clinker teat separator

Abstract

The utility model belongs to electrolytic manganese residue processing technical field, concretely relates to a kind of slag ball tear small sorting machine, comprising: sorting tear frame;Sorting structure has several sieve strips, several sieve strips are side by side arranged on sorting tear frame along first direction, and the feed inlet of slag ball tear small sorting machine is above sorting structure;Tear structure has two tear soil cylinders with same rotation direction, two tear soil cylinders are side by side arranged on the sorting tear frame below several sieve strips along second direction, and the axial direction of tear soil cylinder is first direction, several tear soil claws are arranged on tear soil cylinder, and the discharge outlet of slag ball tear small sorting machine is below tear structure.The utility model is when carrying out impurity sorting and primary crushing to electrolytic manganese residue, and sorting and crushing function are integrated in the slag ball tear small sorting machine used, so that sorting and crushing processing efficiency is high.

Description

Technical Field

[0001] This utility model belongs to the field of electrolytic manganese slag treatment technology, specifically relating to a slag clump tearing and sorting machine. Background Technology

[0002] Manganese is a vital foundation and strategic resource for my country's national economy, widely used in high-tech fields such as steel and non-ferrous metal smelting, electronic batteries, aerospace, and defense industries, holding a significant position. my country is the world's largest producer, consumer, and exporter of electrolytic manganese.

[0003] Electrolytic manganese slag is an acidic waste residue generated during the electrolytic production of metallic manganese. Its main components are SiO2, Al2O3, and CaSO4·2H2O, characterized by high moisture content, high viscosity, and low activity. Electrolytic manganese slag is classified as Class II general industrial solid waste. Producing 1 ton of electrolytic manganese metal generates 10-12 tons of electrolytic manganese slag. The stockpiled amount of electrolytic manganese slag in my country's Manganese Triangle region exceeds 100 million tons, with an annual increase exceeding 10 million tons. How to achieve the "harmlessness, reduction, and resource utilization" of manganese-containing waste residue, and how to comprehensively recycle and utilize electrolytic manganese slag to minimize its harmful effects, has become a focus of attention for manganese-related enterprises and local governments, and is also a crucial link in achieving high-quality development of the electrolytic manganese industry.

[0004] Existing technologies for treating and disposing of electrolytic manganese slag mainly include water washing, leaching, electrochemical methods, solidification, and the recovery of valuable metals. However, these technologies generally suffer from drawbacks such as high water consumption, high costs, and low throughput, making it difficult to achieve large-scale harmless treatment or resource utilization. Furthermore, recent standards and regulations, such as the "Technical Specification for Pollution Control of Manganese Slag" (HJ 1241-2022), the "Technical Guidelines for Pollution Prevention and Control of Solid Waste Recycling" (HJ 1091-2020), and the "Standard for Storage and Landfill of General Industrial Solid Waste" (GB 18599-2020), highlight the significant importance of developing safe and efficient technologies for the harmless treatment and resource utilization of manganese slag for the development of the electrolytic manganese industry and pollution prevention. Utility Model Content

[0005] The present invention addresses the aforementioned technical problems by providing a slag clump tearing and sorting machine.

[0006] A slag agglomeration tearing and sorting machine, the slag agglomeration tearing and sorting machine comprising:

[0007] Sorting and tearing racks;

[0008] The sorting structure has a plurality of screen bars, which are arranged side by side along a first direction on the sorting and tearing frame. The feed inlet of the slag clump tearing and sorting machine is located above the sorting structure.

[0009] The tearing structure has two tearing rollers rotating in the same direction. The two tearing rollers are arranged side by side on the sorting and tearing frame below a plurality of screen bars along a second direction perpendicular to the first direction. The axial direction of the tearing rollers is the first direction. A plurality of tearing claws are arranged on the tearing rollers. The discharge port of the slag clump tearing and sorting machine is located below the tearing structure.

[0010] Optionally, the soil-tearing roller is provided with several sets of soil-tearing claws arranged along the axial direction, and each set of soil-tearing claws is provided with several soil-tearing claws evenly arranged along the circumference.

[0011] Optionally, the center of the soil-tearing claw is located between two adjacent screen bars.

[0012] Optionally, the soil-tearing claw extends into or out between two adjacent screen bars.

[0013] Optionally, the centers of two axially adjacent tearing claws are offset clockwise by a first preset distance in the circumferential direction of the tearing roller.

[0014] Optionally, the two soil-tearing rollers share the same adjustable speed motor, which drives the two soil-tearing rollers to rotate in the same direction simultaneously through a gear transmission mechanism.

[0015] Optionally, there is a preset gap between the tearing claws on the two tearing rollers.

[0016] Optionally, the slag agglomeration tearing and sorting machine further includes:

[0017] Dust covers are respectively installed over the sorting structure and the tearing structure. The top of the sorting structure is an open opening to serve as the feed inlet of the slag agglomeration tearing and sorting machine, and the bottom of the tearing structure is an open opening to serve as the discharge outlet of the slag agglomeration tearing and sorting machine.

[0018] Optionally, the sorting structure is further provided with an openable door on one side, and a downwardly inclined guide plate is provided on the outside of the door.

[0019] Optionally, the sorting structure is also provided with an openable and closable door on one side.

[0020] The sorting structure also has a sorting outer frame and a sorting inner frame. A plurality of the screen bars are arranged on the sorting inner frame. The sorting outer frame is slidably connected to the sorting tearing frame. The sorting outer frame can slide out of the hood. The sorting inner frame can rotate around a first direction or a second direction and is connected to the sorting outer frame. A recycling trough is provided on the side of the sorting tearing frame.

[0021] When it is necessary to clean the remaining impurities on the screen bars, open the cover, slide the outer sorting frame relative to the sorting tearing frame and extend it behind the cover, rotate the inner sorting frame so that the inner sorting frame is tilted, and the remaining impurities on the screen bars fall into the recycling tank under the action of gravity. After cleaning is completed, the inner sorting frame and the outer sorting frame are reset.

[0022] Optionally, the soil-tearing claw adopts a plate-like structure with a trapezoidal cross-section. The bottom end of the soil-tearing claw is fixed to the soil-tearing roller, and soil-tearing protrusions are respectively provided on the two axial sides of the top end of the soil-tearing claw.

[0023] Optionally, the soil-tearing protrusion is disposed on both axial sides of the top end of the soil-tearing claw on the side of the rotation direction of the soil-tearing roller.

[0024] Optionally, the soil-tearing protrusion is integrally formed with the soil-tearing claw.

[0025] Beneficial effects: This utility model has at least one or more of the following advantages:

[0026] 1. In the process of sorting impurities and crushing primary crushing of electrolytic manganese slag, the slag clump tearing sorting machine of this utility model integrates sorting and crushing functions, which makes the sorting and crushing process highly efficient.

[0027] 2. Through the ingenious positioning of the tearing claw, the particle size of the blocky manganese slag after primary crushing can be less than 6cm. Attached Figure Description

[0028] Figure 1 This is a schematic diagram showing the partial system positional relationship of this utility model;

[0029] Figure 2A This is a schematic diagram of a slag clump tearing and sorting machine according to the present invention;

[0030] Figure 2B for Figure 2A Top view;

[0031] Figure 2C for Figure 2A A sectional view;

[0032] Figure 2D for Figure 2A An axial elevation view of a soil-tearing claw;

[0033] Figure 2E for Figure 2A A circumferential elevation view of a soil-tearing claw;

[0034] Figure 2F for Figure 2A Top view of the soil tearing claw;

[0035] Figure 2G for Figure 2A A magnified view of a portion of the image;

[0036] Figure 3A This is a schematic diagram of the internal structure of the hammering section of the drying kiln of this utility model.

[0037] Figures 3B to 3D This is a schematic diagram showing the partial distribution of pounding devices of different lengths inside the drying drum. Detailed Implementation

[0038] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are only for illustrating the essential spirit of the technical solution of the present invention.

[0039] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the art will recognize that embodiments may be practiced without one or more of these specific details. In other instances, well-known apparatuses, structures, and techniques associated with this application may not have been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0040] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0041] In the following description, in order to clearly demonstrate the structure and working method of this utility model, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0042] Reference Figures 1 to 3D This utility model provides a harmless treatment system for electrolytic manganese slag, which includes a sorting and shredding machine 10, a drying kiln 20, a calcining kiln 30, and a cooling kiln 40.

[0043] This invention uses a sorting and shredding machine 10 to separate impurities from electrolytic manganese slag raw materials and then performs primary crushing on the sorted materials. The sorting and shredding machine 10 is preferably located on the side of the feed inlet of the drying kiln 20. The discharge outlet of the sorting and shredding machine 10 is connected to the feed inlet of the drying kiln 20 via a conveyor, so that the primary crushed electrolytic manganese slag raw materials are conveyed to the drying kiln 20 for dehydration and drying treatment, thereby significantly reducing the moisture content of the electrolytic manganese slag raw materials and simultaneously performing ammonia removal treatment. The conveyor can be an existing device such as a feeding belt conveyor or elevator.

[0044] The feed inlet of the roasting kiln 30 is connected to the discharge outlet of the drying kiln 20 via a conveyor. Preferably, the conveyor here is... Figure 1 The feeding conveyor belt 31 of the roasting kiln transports the dehydrated and dried electrolytic manganese slag to the roasting kiln 30 for roasting (also known as calcination). The heat treatment in the roasting kiln 30 helps to reduce the Pb content in the electrolytic manganese slag. 2+ Cu 2+ and Cr 2+ This addresses the problem of heavy metal ion pollution and reduces the water-soluble salt content of electrolytic manganese slag to <2%, thus solving the problem of harmless treatment of electrolytic manganese slag.

[0045] The inlet of the cooling kiln 40 is connected to the outlet of the calcining kiln 30, and the cooling kiln 40 cools the cementitious material obtained after calcination. The cementitious material cooled by the cooling kiln 40 is preferably discharged via a discharge belt conveyor.

[0046] This invention sorts impurities in electrolytic manganese slag before drying and roasting, and crushes the lumpy manganese slag in a primary stage. Through crushing, the harmful gases (key gases are ammonia and sulfur dioxide) in the manganese slag are released more quickly, and the roasting process is accelerated, the roasting efficiency is improved, and the roasting cost is effectively reduced.

[0047] In one embodiment, the sorting and shredding machine 10 can adopt a separate sorting and crushing structure as in the prior art, and preferably adopts an integrated design of the sorting and shredding machine 10 as follows:

[0048] Reference Figures 2A to 2C The sorting and shredding machine 10, also known as the slag clump tearing and sorting machine, includes a sorting and shredding frame 11, a sorting structure, and a shredding structure. The sorting structure has several screen bars 12, and the shredding structure has two tearing rollers 13 rotating in the same direction.

[0049] Several screen bars 12 are arranged side-by-side along a first direction on the sorting and shredding frame 11, with the feed inlet of the sorting and shredding machine 10 located above the sorting structure. Figure 2A and Figure 2BAs shown, let the first direction be the X-axis direction and the second direction be the Y-axis direction. The X-axis direction is perpendicular to the Y-axis direction. Then, several screen bars 12 are arranged side by side on the sorting and tearing frame 11 along the X-axis direction at a preset distance, and the length direction of each screen bar 12 is the Y-axis direction.

[0050] Two tearing rollers 13 are arranged side-by-side along the second direction, i.e., the Y-axis, on a sorting and tearing frame 11 below several screen bars 12. The axial direction of the tearing rollers 13 is the first direction, i.e., the X-axis. When the tearing rollers 13 are mounted on the sorting and tearing frame 11, they can be installed on the frame 11 via a rotating shaft passing through their center, bearings, and bearing seats. The rotating shaft is driven by a drive mechanism, which in turn drives the tearing rollers 13 to rotate. The two tearing rollers 13 rotate in the same direction. Figure 2C As shown, all rotations are counterclockwise.

[0051] Several tearing claws 14 are arranged on the tearing roller 13, and the discharge port of the sorting shredder 10 is located below the tearing structure.

[0052] When the sorting and shredding machine 10 of this embodiment is working, the electrolytic manganese slag raw material can be transported to the sorting structure by the conveyor. Under the obstruction of the screen bars 12, large metal impurities in the electrolytic manganese slag raw material are retained above the screen bars 12, and the electrolytic manganese slag raw material falls into the shredding structure through the gap between two adjacent screen bars 12. With the rotation of the tearing drum 13, the tearing claws 14 rotate accordingly. The rotating tearing claws 14 perform primary crushing on the falling electrolytic manganese slag raw material. The electrolytic manganese slag raw material after primary crushing continues to fall to the discharge port of the sorting and shredding machine 10, and is finally transported to the feed port of the drying kiln 20 by the conveyor.

[0053] In one embodiment, several sets of soil-tearing claws are arranged axially on the soil-tearing roller 13, and each set of soil-tearing claws has several soil-tearing claws 14 evenly arranged circumferentially. That is, the soil-tearing claws 14 in the same set of soil-tearing claws have the same axial position on the soil-tearing roller 13 but different circumferential positions.

[0054] In one embodiment, the center of the tearing claw 14 is located between two adjacent screen bars 12.

[0055] The tearing claws 14 can be arranged organically according to the diameter and axial length of the tearing roller 13. For example, each group of tearing claws has two symmetrically arranged tearing claws 14 in the radial direction, and the center distance between two adjacent groups of tearing claws is 80mm. At the same time, the center of each tearing claw 14 should be in the middle of the two screen bars 12 above it.

[0056] In one embodiment, the soil-tearing claw 14 extends into or out between two adjacent screen bars 12.

[0057] The soil-tearing claw 14 can rotate within the gap between two adjacent screen bars 12, or it can extend out of the gap between two adjacent screen bars 12 to rotate. For example... Figures 2A to 2C , Figure 2G As shown, the preferred soil-tearing claw 14 extends out of the gap between two adjacent screen bars 12 and rotates.

[0058] In one embodiment, the centers of two axially adjacent tearing claws 14 are offset clockwise by a first preset distance around the tearing roller 13.

[0059] like Figure 2B As shown, the soil-tearing claws 14 in the same group of soil-tearing claws have the same axial position but different circumferential positions on the soil-tearing roller 13. The axial and circumferential positions of adjacent soil-tearing claws in two adjacent groups are also different. The axial position of the soil-tearing claws can be determined by the arrangement distance of the screen bars 12, ensuring that the center of each soil-tearing claw is located between two adjacent screen bars 12. The circumferential position of the soil-tearing claws is staggered, meaning that the centers of adjacent soil-tearing claws in two adjacent groups are staggered clockwise on the outer arc surface of the soil-tearing roller 13, for example, by 112mm. This first preset distance can be determined according to the specific diameter of the soil-tearing roller 13, so that each soil-tearing claw 14 on the soil-tearing roller 13 can be evenly arranged axially on the outer arc surface of the soil-tearing roller 13.

[0060] By cleverly positioning the tearing claws, the particle size of the lumpy manganese slag after primary crushing can be less than 6cm.

[0061] In one embodiment, the two soil-tearing rollers 13 share the same adjustable speed motor, which drives the two soil-tearing rollers 13 to rotate in the same direction simultaneously through a gear transmission mechanism.

[0062] The gear transmission mechanism can directly adopt existing technology, as long as the adjustable speed motor can drive both soil-tearing rollers 13 to rotate in the same direction simultaneously. The motor is an adjustable speed motor, which can ensure that the speed of the soil-tearing roller 13 is adjustable between 0.2 rpm and 2 rpm.

[0063] In one embodiment, there is a predetermined gap between the tearing claws 14 on the two tearing rollers 13.

[0064] like Figure 2C As shown, when the radius of the tearing roller 13 is 250mm and the radial length of the tearing claw 14 is 200mm, the center distance between the two tearing rollers 13 is 950mm. That is to say, the preset gap is 50mm.

[0065] In one embodiment, reference is made to Figures 2A to 2CThe sorting and shredding machine 10 also includes a dust cover 15, which covers the sorting structure and the shredding structure respectively. The top of the sorting structure is an open opening to serve as the feed inlet of the sorting and shredding machine 10, and the bottom of the shredding structure is an open opening to serve as the discharge outlet of the sorting and shredding machine 10.

[0066] In one embodiment, reference is made to Figure 2A The sorting structure is also provided with an openable door 151 on one side, and a downwardly inclined guide plate 152 is provided on the outside of the door 151.

[0067] When it is necessary to clean the remaining impurities on the screen bar 12, open the cover door 151 for cleaning. The impurities can fall along the guide plate 152. In practice, a recycling tank can be placed at the bottom of the guide plate 152 to recover the impurities.

[0068] In one embodiment, an openable hood is provided on one side of the sorting structure. The sorting structure also has a sorting outer frame and a sorting inner frame, with a plurality of screen bars 12 disposed on the sorting inner frame. The sorting outer frame is slidably connected to the sorting tearing frame 11 and can slide out of the hood. The sorting inner frame can rotate around a first direction or a second direction and is connected to the sorting outer frame. A recycling trough is provided on the side of the sorting tearing frame 11.

[0069] When it is necessary to clean the remaining impurities on the screen bar 12, open the cover, slide the outer frame relative to the screen tearing frame 11 and extend it behind the cover, rotate the inner frame so that the inner frame is tilted, and the remaining impurities on the screen bar fall into the recycling tank under the action of gravity. After cleaning, the inner frame and outer frame are reset.

[0070] In one embodiment, reference is made to Figures 2D to 2G The soil tearing claw 14 adopts a plate-like structure with a trapezoidal cross section. The long side of the bottom end of the soil tearing claw 14 is fixed to the soil tearing roller 13, and the top short side of the soil tearing claw 14 is provided with soil tearing protrusions 141 on both sides.

[0071] In one embodiment, the soil-tearing protrusion 141 is provided on both sides of the top end of the soil-tearing claw 14 on the rotation direction side of the soil-tearing roller 13.

[0072] In other words, the soil-tearing protrusion 141 does not cover both sides of the top axial direction of the soil-tearing claw 14, but is located at a portion of the top axial direction of the soil-tearing claw 14, and this position is consistent with the rotation direction of the soil-tearing roller 13. For example Figure 2C In the middle, the soil-tearing roller 13 rotates counterclockwise, therefore, as Figure 2D and Figure 2G As shown, the soil-tearing protrusion 141 is located on the left half of the top half of the soil-tearing claw 14.

[0073] In practice, the top surface of the soil-tearing protrusion 141 is flush with the top surface of the soil-tearing claw 14, so that the top surface of the soil-tearing claw 14 presents a T-shaped structure.

[0074] In one embodiment, the soil-tearing protrusion 141 and the soil-tearing claw 14 are integrally formed.

[0075] In one embodiment, the tearing claw 14 is made of steel, and the steel of the tearing claw 14 has a higher strength than the materials of other devices in the sorting and shredding machine 10.

[0076] In one embodiment, the thickness of the screen bar 12 and the thickness of the soil tearing claw 14 are the same, preferably 20 mm. That is, the gap between two adjacent screen bars 12 should be greater than 20 mm.

[0077] In one embodiment, reference is made to Figure 1 The drying kiln 20 performs secondary crushing on the raw materials. The drying kiln 20 is divided into a drying section 20a and a hammering section 20b from the feed inlet to the discharge outlet. The crushing device for secondary crushing is located in the hammering section 20b.

[0078] Typically, the electrolytic manganese slag raw material after primary crushing has a high moisture content, ranging from 20% to 45%, and its composition includes hydrophilic dihydrate gypsum, with the moisture existing in the capillary pores of the manganese slag. If secondary crushing is performed near the feed inlet of the drying kiln 20, the high moisture content of the raw material is not conducive to crushing and easily causes it to stick to the crushing device, reducing crushing efficiency and quality. Therefore, in this embodiment, the secondary crushing of the raw material is performed in a section away from the feed inlet of the drying kiln 20. After the raw material enters the drying kiln 20, it is first dried, and then crushed, resulting in higher crushing efficiency and quality.

[0079] In this embodiment, the crushing device can be an existing device for crushing raw materials using the prior art, and preferably adopts the following design:

[0080] Reference Figure 1 and Figure 3A The drying kiln 20 includes a drying drum 21 and a plurality of hammering devices 22.

[0081] The drying drum 21 is rotatable. The drying drum 21 is inclined and the height of the inlet end is lower than the height of the outlet end. The drying drum 21 is divided into a drying section 20a and a pounding section 20b from the inlet to the outlet.

[0082] Several hammering devices 22 are located in the hammering section 20b, and the several hammering devices 22 are rotatably connected in the hammering section 20b.

[0083] In this embodiment, the drying drum 21 rotates. Since the drying drum 21 is inclined, the raw material inside it is constantly turned and moved slowly from the drying section 20a to the pounding section 20b during its rotation. When the raw material moves to the pounding section 20b, several pounding devices 22 in the pounding section 20b perform secondary pounding / crushing on the raw material while rotating.

[0084] In this embodiment, after sorting and removing impurities from the raw materials, primary crushing and secondary crushing are carried out in sequence. Through impurity sorting and secondary crushing of lumpy materials, damage to the equipment by the raw materials can be avoided and the heat treatment efficiency can be improved.

[0085] In one embodiment, reference is made to Figures 3A to 3D The pounding device 22 includes a pounding connecting rod 221 and a pounding head 222. One end of the pounding connecting rod 221 is rotatably connected to the inner wall of the pounding section 20b about the axial direction of the drying drum 21. The pounding head 222 is fixed to the other end of the pounding connecting rod 221.

[0086] When the drying drum 21 rotates, for example Figures 3B to 3D When rotating clockwise, the hammering connecting rod 221 in the hammering section 20b of the drying drum 21 swings freely. When the hammering connecting rod 221 swings freely, the hammering connecting rod 221 and the hammering head 222 at its end perform secondary hammering / crushing on the raw material after a certain drying process.

[0087] In practice, one end of the hammering connecting rod 221 can be hinged to the inner wall of the hammering section 20b.

[0088] In one embodiment, reference is made to Figure 3A Several hammering devices 22 are arranged along the axial direction, and two adjacent hammering devices 22 are offset clockwise by a second preset distance within the inner circumference of the hammering section 20b.

[0089] Of course, the two adjacent hammering devices 22 can also be offset counterclockwise by a second preset distance in the circumferential direction within the hammering section 20b.

[0090] The second preset distance can be determined according to the inner diameter of the drying drum 21, so that each of the pounding devices 22 in the pounding section 20b can be evenly arranged along the axial direction on the inner arc surface of the pounding section 20b.

[0091] For example, the inner diameter of the drying drum 21 is 1500mm, the axial length of the pounding section 20b is 5000mm, the axial length of the pounding head 222 is 200mm, and the second preset distance is 184mm.

[0092] In one embodiment, reference is made to Figure 3ASeveral hammering devices 22 are divided into several hammering device groups along the axial direction. Each hammering device group has several hammering devices 22. While the hammering devices 22 in the same group are offset clockwise by a second preset distance in the inner circumference of the hammering section 20b, the hammering connecting rod 221 gradually shortens.

[0093] like Figure 3A As shown, a set of hammering devices has three hammering devices 22, but it can also have two, four, or more than four. The three hammering devices 22 are staggered clockwise on the inner circumference of the hammering section 20b, while the three hammering connecting rods 221 gradually shorten. For example... Figures 3B to 3D As shown, the length of the longest hammering connecting rod 221 should ensure that its combined length with the hammering head 222 does not exceed the radius of the drying drum 21. When the inner diameter of the drying drum 21 is 1500mm, the length of the longest hammering connecting rod 221 is preferably 630mm, and the length of the hammering connecting rod 221 decreases sequentially to 420mm and 210mm.

[0094] By cleverly positioning the hammering device, the particle size of the manganese slag after secondary crushing can be less than 2.5 cm.

[0095] In one embodiment, the center distance between two adjacent hammering devices 22 is consistent with the axial length of the hammering head 222.

[0096] For example, when the axial length of the hammer head 222 is 200mm, the center distance between two adjacent hammering devices 22 is also 200mm.

[0097] In one embodiment, the inner diameter of the drying drum 21 is 1500 mm, and the axial length of the pounding section 20b is 5000 mm. The axial length of the pounding head 222 is greater than the diameter of the pounding connecting rod 221, and the axial length of the pounding head 222 is 200 mm.

[0098] In one embodiment, both the drying kiln 20 and the calcining kiln 30 are variable frequency electromagnetic eddy current rotary furnaces. The variable frequency electromagnetic eddy current rotary furnace is equipped with a temperature sensor. The temperature sensor detects the current temperature value of the variable frequency electromagnetic eddy current rotary furnace and controls the working power of the electromagnetic coil of the variable frequency electromagnetic eddy current rotary furnace according to the current temperature value. When the current temperature value reaches the preset temperature range, the variable frequency electromagnetic eddy current rotary furnace stops working.

[0099] In practical implementation, multiple temperature sensors can be arranged in sections of the variable frequency electromagnetic eddy current rotary furnace to achieve multi-point temperature measurement. The current temperature value is calculated from the temperature values ​​of multiple temperature sensors, such as the average value. The current temperature is compared with the set target temperature to obtain the temperature deviation. Based on the temperature deviation, the output power value is calculated using a PID algorithm. The calculated power value is then controlled by PWM or frequency regulation, such as adjusting the frequency or duty cycle through a variable frequency power supply, to control the eddy current intensity and thus the working power of the electromagnetic coil. The above automatic control method can be timed, such as cycling once per second or millisecond, to achieve constant temperature or programmed temperature rise. For example, a temperature rise curve can be set to achieve gradient control.

[0100] In this embodiment, both the drying kiln and the calcining kiln adopt variable frequency electromagnetic eddy current rotary furnaces. Through automatic control technology, variable frequency technology, and electromagnetic eddy current heating technology, electrolytic manganese slag is heat-treated, resulting in thorough removal of pollutants, stable performance, low cost, heating speed down to the second level, high efficiency, and stable product quality. This allows the production line to be heated to the preset temperature throughout the 24 / 7 production process, with high heat utilization rate and low experimental heat loss rate. It has significant automation integration capabilities, operability, and scalability, which aligns with the Chinese policy "Industrial Energy Efficiency Improvement Action Plan," which explicitly promotes the replacement of coal-fired / resistance furnaces with induction heating.

[0101] In one embodiment, the power (P) of the electromagnetic coil is related to the target temperature (T), the current temperature (T0), the material heat capacity (C), and the system heat loss (k, the system heat loss of this invention is 2.7%, therefore k=97.3%). The frequency conversion technology and the basic equation for power regulation used in this embodiment are as follows:

[0102]

[0103] in, Indicates the target temperature; Indicates the initial temperature; =97.3%; This indicates the specific heat capacity of the kiln material (unit: J / ℃). This indicates the system's temperature-related heat loss (unit: W).

[0104] This example preferably uses AI-based precise control. To achieve precise control, a PID algorithm is used to dynamically adjust the power. Therefore, the formula for adjusting the working power of the electromagnetic coil of the variable frequency electromagnetic eddy current rotary furnace based on the current temperature value is as follows:

[0105]

[0106]

[0107] in, This indicates the operating power of the electromagnetic coil that needs to be adjusted at time t; This represents the target temperature at time t; This represents the current temperature at time t; Indicates proportional gain; Indicates integral gain; This represents the differential gain.

[0108] The control and commissioning methods for variable frequency electromagnetic eddy current rotary furnaces include:

[0109] Pre-set =0、 =0, gradually increase Until the system oscillates, Then take 50% as initial ;

[0110] Introduction Eliminate static error, from the initial Start with ×0.01, then add = ×0.1 suppresses overshoot.

[0111] The variable frequency electromagnetic eddy current rotary furnace using the above control method was tested according to GB / T26185-2010 standard, and the heating efficiency of the variable frequency electromagnetic eddy current rotary furnace was 97.3%.

[0112] In one embodiment, the electrolytic manganese slag harmless treatment system further includes a heat circulation recovery device, which includes a plate heat exchanger. The plate heat exchanger has a first channel and a second channel for heat exchange. The first channel is connected to the discharge port of the roasting kiln 30 and / or the feed port of the cooling kiln 40, and the second channel is connected to the drying kiln 20. The heat in the raw materials sent from the roasting kiln 30 to the cooling kiln 40 is transferred to the drying kiln 20 through heat exchange via the plate heat exchanger.

[0113] After the material enters the cooling kiln, the material temperature drops from 600℃ to below 100℃. In this embodiment, a heat recovery device is also used to realize heat recovery and recycling, transferring the waste heat to the drying kiln, which makes the drying efficiency high and reduces the production cost.

[0114] like Figure 1 As shown, heat recovery pipe 50 is the second channel.

[0115] In one embodiment, the electrolytic manganese slag harmless treatment system also includes a dust removal device. The air inlet of the dust removal device is connected to the air outlet of the drying kiln 20 through a pipeline, and the dust removal device removes dust from the flue gas discharged from the drying kiln 20.

[0116] The dust removal equipment can be installed near the air outlet of the drying kiln 20.

[0117] Existing technologies can be directly adopted for dust removal equipment.

[0118] In one embodiment, the electrolytic manganese slag harmless treatment system further includes a drying kiln flue gas recovery device, which includes at least one or a combination of a first waste gas purification spray tower, a second waste gas purification spray tower, and a carbon box.

[0119] During the dehydration and drying process of raw materials in the drying kiln 20, a large amount of ammonia gas is released. It is necessary to recover the ammonia gas in the flue gas before discharging it into the external environment.

[0120] The inlet of the first waste gas purification spray tower is connected to the outlet of the drying kiln 20 or the outlet of the dust removal equipment via a pipeline. The spray nozzles of the first waste gas purification spray tower are connected to the first liquid tank via the first circulating pump. The first liquid tank contains acid solution for ammonia removal treatment. The flue gas discharged from the drying kiln 20 is sent directly or after being dedusted by the dust removal equipment before being sent to the first waste gas purification spray tower. The acid solution is sprayed out through the spray nozzles, and reacts with the ammonia in the flue gas to achieve the purpose of ammonia removal treatment. The acid solution is dilute sulfuric acid (H2SO4), phosphoric acid (H3PO4), or hydrochloric acid (HCl), preferably hydrochloric acid.

[0121] The outlet of the first waste gas purification spray tower is connected to the external environment or connected to the inlet of the second waste gas purification spray tower or connected to the inlet of the carbon box via a pipeline.

[0122] The inlet of the second waste gas purification spray tower is connected via a pipeline to the outlet of the drying kiln 20, the outlet of the dust removal equipment, or the outlet of the first waste gas purification spray tower. The spray nozzles of the second waste gas purification spray tower are connected to a second liquid tank containing water via a second circulating pump. The flue gas discharged from the drying kiln 20 is either directly sent to the second waste gas purification spray tower, or first passed through the dust removal equipment before being sent to the second waste gas purification spray tower, or sequentially passed through the dust removal equipment and the first waste gas purification spray tower before being sent to the second waste gas purification spray tower. Water is sprayed out through the spray nozzles, and the water reacts with ammonia gas to achieve the purpose of ammonia removal.

[0123] The outlet of the second waste gas purification spray tower is connected to the external environment or connected to the inlet of the carbon box through a pipeline.

[0124] The inlet of the carbon box is connected via a pipeline to the outlet of the drying kiln 20, the outlet of the dust removal equipment, the outlet of the first waste gas purification spray tower, or the outlet of the second waste gas purification spray tower. Activated carbon is placed inside the carbon box. The outlet of the carbon box is directly or via a pipeline connected to the external environment. The flue gas discharged from the drying kiln 20 is either directly fed into the carbon box, first treated by the dust removal equipment, then purified by the first waste gas purification spray tower, or sequentially treated by the dust removal equipment and then purified by the first and second waste gas purification spray towers before being fed into the carbon box. Ammonia removal is achieved through adsorption by the activated carbon in the carbon box. In practice, the activated carbon in the carbon box should be replaced periodically.

[0125] This embodiment allows for a customized approach based on the ammonia concentration of the electrolytic manganese slag. For example, when the electrolytic manganese slag is new slag (ammonia concentration >1000ppm), purification is performed sequentially using a first waste gas purification spray tower, a second waste gas purification spray tower, and a carbon box. Prior to purification using a drying kiln flue gas recovery device, dust removal is preferably performed first. Alternatively, when the electrolytic manganese slag is from a closed slag storage facility (ammonia concentration 50ppm~1000ppm), purification is performed solely using a carbon box.

[0126] This embodiment addresses the dust and flue gas issues during the electrolytic manganese slag treatment process by using dust removal equipment and / or various flue gas recovery devices, achieving a better harmless treatment objective.

[0127] In one embodiment, the drain port of the first waste gas purification spray tower is connected to a first liquid tank via a pipeline. A first pH probe is installed inside the first liquid tank to detect the first pH value of the acid solution in the first liquid tank. When the first pH value reaches a preset pH value, an alarm is triggered. With this design, the liquid after the first waste gas purification spray tower absorbs ammonia is recycled and reused. By detecting the pH value, it is possible to predict whether the ammonia solution in the first liquid tank is saturated. When the ammonia solution in the first liquid tank is saturated, an alarm is triggered, prompting the user to replace the liquid solution in the first liquid tank.

[0128] Similarly, the drain outlet of the second waste gas purification spray tower is connected to the second liquid tank through a pipeline. The second liquid tank is equipped with a second pH probe, which detects the second pH value of the water in the second liquid tank. When the second pH value reaches the preset pH value, an alarm is triggered.

[0129] In one embodiment, stirring pumps are respectively installed in the first liquid tank and the second liquid tank.

[0130] In one embodiment, the first liquid tank and the second liquid tank are each provided with a dosing pipeline connected to the liquid tank, and a metering pump is provided on the dosing pipeline for adding a measured amount of acid or water.

[0131] In one embodiment, the electrolytic manganese slag harmless treatment system further includes a roasting kiln flue gas recovery device. The roasting kiln flue gas recovery device includes a third waste gas purification spray tower. The air inlet of the third waste gas purification spray tower is connected to the air outlet of the roasting kiln 30 through a pipeline. The spray nozzle of the third waste gas purification spray tower is connected to a third liquid tank through a third circulating pump. The third liquid tank contains water.

[0132] During the high-temperature calcination of raw materials in the calcining kiln 30, ammonia nitrogen is released. The ammonia nitrogen further volatilizes and decomposes into nitric acid, so it also needs to be recovered through a spray tower.

[0133] In one embodiment, the electrolytic manganese slag harmless treatment system further includes a reactor, the first inlet of the reactor being connected to a first liquid tank and / or a second liquid tank via a pipeline and a metering pump, and the second inlet of the reactor being connected to a third liquid tank via a pipeline and a metering pump.

[0134] The drain outlet of the first waste gas purification spray tower is connected to the first liquid tank through a pipeline. The first liquid tank is equipped with a first pH probe. The first pH probe detects the first pH value of the liquid in the first liquid tank. When the first pH value reaches the preset pH value, the liquid in the first liquid tank is sent into the reactor through the first feed inlet by a metering pump.

[0135] The drain outlet of the second waste gas purification spray tower is connected to the second liquid tank through a pipeline. The second liquid tank is equipped with a second pH probe, which detects the second pH value of the water in the second liquid tank. When the second pH value reaches the preset pH value, the liquid in the second liquid tank is sent to the reactor through the first feed inlet by a metering pump.

[0136] The discharge port of the third waste gas purification spray tower is connected to the third liquid tank through a pipeline. The liquid in the third liquid tank is sent to the reactor through the second feed port by a metering pump. The reactor realizes the reaction between saturated ammonia water and nitric acid to produce ammonium nitrate.

[0137] In this embodiment, the ammonia water in the first and / or second liquid tanks, after forming saturated ammonia water, is fed into the reactor. In the reactor, at a temperature range of 100°C to 200°C and under normal pressure or a pressure of 1.5 MPa to 2 MPa (15 atm to 20 atm), the saturated ammonia water reacts with nitric acid to produce nitrogen fertilizer (such as ammonium nitrate), thus converting it into a valuable product. The nitric acid can be the nitric acid recovered from the third liquid tank during the roasting process.

[0138] Example 1:

[0139] Parameters for the design and implementation of a production line for the harmless treatment of electrolytic manganese slag:

[0140] Density of electrolytic manganese slag: 2.5 tons / m³3 (Sampling from Jindi slag storage); Bulk density: Theoretical 1.6 tons / m³ 3 (Actual measurement: 1.3 tons / m³) 3 (Sampling of the three slag storage areas); Drying kiln body diameter: 1.5m; Drying kiln body length: 20m; Firing kiln body diameter: 1.3m; Firing kiln body length: 24m;

[0141] Production capacity is calculated based on raw material input:

[0142] Minimum capacity = 3.14 0.75 0.75 (kiln body radius) 15% (kiln utilization rate) 20m (kiln body length) 1.3 (bulk density) + 3.14 0.65 0.65 (kiln body radius) 15% (kiln utilization rate) 24m (kiln body length) 1.3 = 11.664 tons / hour;

[0143] Maximum capacity = 3.14 0.75 0.75 (kiln body radius) 20% (kiln utilization rate) 20m (kiln body length) 1.3 (bulk density) + 3.14 0.65 0.65 (kiln body radius) 20% (kiln utilization rate) 24m (kiln body length) 1.3 = 17.463 tons / hour;

[0144] Daily output: 279.936 tons ~ 419.112 tons / day;

[0145] Annual production (considering maintenance, based on 300 days / year): 83,981 tons to 125,773 tons / year.

[0146] The electrolytic manganese slag harmless treatment system has a full-load total power of 2704.5 kW, with a reserved power of 204.5 kW (for the fan, kiln operation, feed inlet, and discharge outlet conveyors), resulting in a total production line power of 2704.5 kW. The maximum hourly power consumption (due to the use of frequency conversion technology, experimental statistics show an energy consumption of 177 kWh per ton; in pilot-scale testing, 3 kg to 8 kg of manganese were roasted per hour) is 2704.5 kWh.

[0147] Maximum energy consumption per ton: 231.86 kWh ~ 154.870 kWh; Industrial electricity price: 0.62 yuan / kWh; Maximum cost per ton (power loss): 143.75 yuan ~ 96.01 yuan.

[0148] This utility model embodiment also provides a method for harmless treatment of electrolytic manganese slag, which is preferably implemented using the electrolytic manganese slag harmless treatment system provided in the above embodiments of this utility model.

[0149] The method for harmlessly treating electrolytic manganese slag includes the following specific steps:

[0150] S1, Primary Crushing: Primary crushing of electrolytic manganese slag.

[0151] In one embodiment, S1, sorting and primary crushing: In step S1, before primary crushing of the electrolytic manganese slag, the electrolytic manganese slag is sorted to remove impurities. Sorting removes impurities such as metal blocks to avoid damage to subsequent crushing equipment.

[0152] In one embodiment, in step S1, after primary crushing of the electrolytic manganese slag, the particle size of the electrolytic manganese slag is less than 6 cm, preferably 5 cm.

[0153] In one embodiment, in step S1, existing sorting devices can be used to remove impurities from electrolytic manganese slag, and existing crushing devices can be used to perform primary crushing of electrolytic manganese slag.

[0154] The sorting and shredding machine 10 provided in the above embodiments of this utility model is preferably used to remove impurities and perform primary crushing on electrolytic manganese slag.

[0155] S2, Dehydration and Drying Treatment: The electrolytic manganese slag is dehydrated and dried within a preset drying temperature range, while simultaneously undergoing ammonia removal treatment, so that the moisture content of the electrolytic manganese slag is reduced to within a preset moisture content. The preferred preset moisture content is 13%.

[0156] Because of the high moisture content of electrolytic manganese slag raw materials, ranging from 20% to 45%, and the presence of hydrophilic dihydrate gypsum in its composition, the moisture exists in the capillary pores of the manganese slag. Ordinary evaporation and air drying can only reduce the free water in the manganese slag but not this moisture. Therefore, drying treatment is required in order to prepare cementitious materials.

[0157] In one embodiment, S2, dehydration and drying treatment and secondary crushing: In step S2, when the electrolytic manganese slag is dehydrated and dried, it is also subjected to secondary crushing so that the particle size of the predetermined part of the electrolytic manganese slag is less than 2.5 cm, preferably less than 2 cm.

[0158] In this embodiment, since the secondary crushing is carried out simultaneously with the drying process, for example in a drying device, which is typically a relatively sealed environment, the electrolytic manganese slag can be crushed to a smaller particle size during this process. The preset ratio is preferably 90%, meaning that after secondary crushing, 90% of the particles are smaller than 2.5 cm. Through primary and secondary crushing, the release of harmful gases (key gases being ammonia and sulfur dioxide) from the manganese slag during drying and subsequent roasting processes can be accelerated. Simultaneously, the roasting process is sped up, roasting efficiency is improved, and roasting costs are effectively reduced.

[0159] In one embodiment, in step S2, the electrolytic manganese slag is dehydrated and dried by a drying kiln. The drying kiln is divided into a drying section and a crushing section from the feed inlet to the discharge outlet. The electrolytic manganese slag is subjected to secondary crushing in the crushing section.

[0160] Preferably, the drying kiln 20 provided in the above embodiments of this utility model is used to dehydrate and dry the electrolytic manganese slag and perform secondary crushing.

[0161] In one embodiment, in step S2, when dehydrating and drying the electrolytic manganese slag, the dehydration and drying temperature does not exceed 300°C, and preferably the dehydration and drying temperature is 200°C to 300°C. The dehydration and drying time is 30 minutes to 50 minutes, and preferably 40 minutes.

[0162] In this embodiment, low temperature (maximum temperature not exceeding 300℃) is used to dehydrate and dry the raw electrolytic manganese slag. Because primary crushing is carried out before dehydration and drying, and especially secondary crushing is carried out during dehydration and drying, the entire dehydration and drying process is relatively short, that is, the moisture content of the electrolytic manganese slag can be reduced to the preset moisture content in 30 to 50 minutes.

[0163] In one embodiment, in step S2, during the ammonia removal process, at least one or more combinations of the following are employed: spraying acid solution from a waste gas purification spray tower to absorb ammonia, spraying water from a waste gas purification spray tower to absorb ammonia, and using activated carbon adsorption.

[0164] The preferred method for ammonia removal is to use the drying kiln flue gas recovery device provided in the above embodiments of this utility model.

[0165] In step S2, the concentration of Mn2+ ions, water-soluble salts, and pH value in the electrolytic manganese slag raw material are reduced. Specifically, during the heating process:

[0166] Step 1. Evaporation of free water (physical change) (conducted in a drying kiln at 0℃~100℃)

[0167] Free water in manganese slag is removed from the solid through evaporation when the temperature is raised to 100°C.

[0168]

[0169] Step 2. Decomposition of water of crystallization (chemical change) (conducted in a drying kiln at 100℃~200℃)

[0170] As the temperature continues to rise to 100℃~200℃, manganese hydroxide and hydrated manganese sulfate release water of crystallization.

[0171] Decomposition of manganese hydroxide:

[0172] Decomposition of hydrated manganese sulfate:

[0173] Decomposition of hydrated manganese ferric sulfate:

[0174] Simultaneously, ammonia removal treatment is carried out.

[0175]

[0176] Ammonia gas is captured and dissolved in water to form ammonia water (physical change):

[0177]

[0178] The resulting saturated ammonia solution is produced at temperatures ranging from 100°C to 200°C, and the reaction typically takes place at atmospheric pressure or pressures of 1.5 to 2 MPa (15 to 20 atm).

[0179]

[0180] The reaction produces nitrogen fertilizer (such as ammonium nitrate), which is then converted into a valuable product.

[0181] S3, roasting treatment: The electrolytic manganese slag is roasted within a preset roasting temperature range to achieve desulfurization of the electrolytic manganese slag and reduce the water-soluble salt content of the electrolytic manganese slag to within the preset water-soluble salt limit.

[0182] In this step, heat treatment is used to remove Pb from the electrolytic manganese slag. 2+ Cu 2+ and Cr 2+ The problem of heavy metal ion pollution was addressed, and the water-soluble salt content of electrolytic manganese slag was reduced to a preset limit, such as <2%, thus solving the problem of harmless treatment of electrolytic manganese slag.

[0183] In one embodiment, in step S3, when roasting the electrolytic manganese slag, the roasting temperature does not exceed 600°C, preferably 400°C to 600°C, and more preferably 600°C. The roasting time does not exceed 60 minutes, preferably 30 to 50 minutes.

[0184] The roasting process is preferably achieved using the roasting kiln 30 provided in the above embodiments of this utility model.

[0185] In one embodiment, in step S3, when roasting the electrolytic manganese slag, flue gas denitrification technology (SCR) is also used to recover nitric acid.

[0186] The preferred method for recovering nitric acid is to use the calcining kiln flue gas recovery device provided in the above embodiments of this utility model.

[0187] In one embodiment, the saturated ammonia water obtained during the deammoniation treatment in step S2 is reacted with the nitric acid obtained in step S3 to obtain ammonium nitrate.

[0188] The reactors provided in the above embodiments of this invention are preferably used to react and obtain ammonium nitrate.

[0189] In step S3,

[0190] Step 3. Decomposition of sulfates and pyrite (chemical change) (carried out in a roasting kiln at 400℃~600℃)

[0191] Decomposition of sulfate minerals:

[0192]

[0193] Pyrite decomposes into iron oxide and sulfur oxides at 400℃~600℃:

[0194]

[0195] The decomposition process of sulfates and pyrite constitutes the desulfurization process, with an efficient desulfurization temperature range of 400–600℃. This temperature range is suitable for decomposing most sulfides and sulfates, achieving efficient desulfurization.

[0196] Further volatilization and decomposition of ammonia nitrogen:

[0197]

[0198] This stage involves converting ammonia into nitric acid. In industrial processes, flue gas denitrification (SCR) technology is used, with the reaction temperature controlled between 250°C and 450°C to increase the reaction rate. The reaction steps are as follows:

[0199]

[0200]

[0201] Nitric acid (HNO3) is the main product of the reaction, while nitrous acid (HNO2) is a byproduct. Nitrous acid can further react with oxygen to form nitric acid.

[0202]

[0203] The nitric acid produced in this stage continues to react with the ammonia water from Step 2 to produce ammonium nitrate.

[0204] S4, cooling the product after roasting.

[0205] The product after calcination is the cementitious material. In this step, the cementitious material at 600℃ can be cooled down to below 100℃ using a cooling kiln.

[0206] This utility model embodiment also provides a cementing material, which includes raw materials in the following mass ratios: 32%~40% silicon dioxide (SiO2), 7%~9% aluminum oxide (Al2O3), 6%~9% ferric oxide (Fe2O3), and 8%~14% calcium oxide (CaO).

[0207] Cement mainly consists of four materials: silicon dioxide, aluminum oxide, ferric oxide, and calcium oxide, accounting for more than 95%. The cementitious material provided in this embodiment of the invention has a maximum proportion of these four materials of 72%, therefore the cementitious material can replace part of the cement and completely replace part of the traditional fine aggregate.

[0208] In one embodiment, the cementitious material further includes the following raw materials in the following mass ratios: 0.5% to 1.5% magnesium oxide (MgO) and 4% to 7% manganese oxide (MnO).

[0209] In other words, the cementitious material in this embodiment includes the following raw materials in the following mass ratios: 32%~40% silicon dioxide, 7%~9% aluminum oxide, 6%~9% ferric oxide, 8%~14% calcium oxide, 0.5%~1.5% magnesium oxide, 4%~7% magnesium oxide, and the remainder is water and necessary impurities.

[0210] In one embodiment, the cementing material is prepared by the harmless treatment method for electrolytic manganese slag provided in the above embodiments of this utility model.

[0211] Example 2:

[0212] The manganese slag from Sanhe Slag Depot (moisture content 23-25%) and the manganese slag from Jindi Slag Depot (moisture content approximately 30%) were treated using the following method:

[0213] S1, the sorting and shredding machine 10 of this utility model is used to remove impurities and perform primary crushing on the electrolytic manganese slag, so that the particle size of the electrolytic manganese slag is less than 6cm.

[0214] S2, the drying kiln 20 of this utility model is used to dehydrate and dry the electrolytic manganese slag and perform secondary crushing. The dehydration and drying temperature is 280℃ and the dehydration and drying time is 40 minutes, which reduces the moisture content of the electrolytic manganese slag to less than 13% and 90% of the particles in the electrolytic manganese slag are smaller than 2.5cm.

[0215] S3, the calcining kiln 30 of this utility model is used to calcine the electrolytic manganese slag. The parameters during the calcination process are shown in Table 1 below.

[0216] S4, cool the calcined cementitious material to below 100°C.

[0217] Table 1: Statistical Table of Calcination Tests

[0218]

[0219] The product states after roasting in step S3 are shown in Tables 2 and 3 below.

[0220] Table 2: State of manganese slag after roasting at Sanhe Slag Storage

[0221]

[0222] Table 3: State of manganese slag after roasting at Jindi Slag Storage

[0223]

[0224] The product of the manganese slag roasted from the Jindi slag storage was used as a cementing material for testing. The test results are shown in Table 4.

[0225] Table 4: Test Results

[0226]

[0227] Roasted electrolytic manganese slag Solid waste conversion Key indicators for solid waste are:

[0228]

[0229] According to Tables 2 to 4, at a roasting temperature of 600℃, the water-soluble salt concentration is <20 mg / kg, and the heavy metal elements are: copper (Cu) ≤100 mg / L, zinc (Zn) ≤100 mg / L, cadmium (Cd) ≤1 mg / L, lead (Pb) ≤5 mg / L, chromium (Cr) ≤15 mg / L, nickel (Ni) ≤5 mg / L, arsenic (As) ≤5 mg / L, and mercury (Hg) ≤0.1 mg / L. This meets the requirements of the "Identification Standard for Hazardous Waste - Leaching Toxicity Identification" (GB5085.3-2007). Requirements for solid waste. Therefore, the roasting temperature should not exceed 600℃, and 600℃ is preferred.

[0230] The cementitious material obtained after calcination and cooling of the above sample number LMZ600 was tested, and the test results are shown in Table 5.

[0231] Table 5: Main Components of Roasted Electrolytic Manganese Slag as a Cementitious Material

[0232]

[0233] As shown in Table 5, the six main materials in the roasted electrolytic manganese slag—silicon dioxide, aluminum oxide, ferric oxide, calcium oxide, magnesium oxide, and manganese oxide—account for 72%. Therefore, the roasted electrolytic manganese slag has certain cementitious material characteristics and can replace part of the cement and completely replace 40% of the fine aggregate in the traditional primary road water-stabilized layer.

[0234] In addition, the gelling properties of gelling materials can be activated by using readily soluble sodium silicate, water glass, or alkaline materials.

[0235] The preferred embodiments of this utility model have been described in detail above. However, it should be understood that after reading the above teachings, those skilled in the art can make various alterations or modifications to this utility model. These equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A slag lumps tearing and sorting machine, characterized in that, The slag agglomeration tearing and sorting machine includes: Sorting and tearing racks; The sorting structure has a plurality of screen bars, which are arranged side by side along a first direction on the sorting and tearing frame. The feed inlet of the slag clump tearing and sorting machine is located above the sorting structure. The tearing structure has two tearing rollers rotating in the same direction. The two tearing rollers are arranged side by side on the sorting and tearing frame below a plurality of screen bars along a second direction perpendicular to the first direction. The axial direction of the tearing rollers is the first direction. A plurality of tearing claws are arranged on the tearing rollers. The discharge port of the slag clump tearing and sorting machine is located below the tearing structure.

2. The slag agglomeration tearing and sorting machine as described in claim 1, characterized in that, The soil tearing roller is provided with several sets of soil tearing claws arranged along the axial direction, and each set of soil tearing claws is provided with several soil tearing claws evenly arranged along the circumference. And / or, the center of the soil-tearing claw is located between two adjacent screen bars.

3. The slag agglomeration tearing and sorting machine as described in claim 2, characterized in that, The soil-tearing claw extends into or out between two adjacent screen bars; And / or, the centers of two axially adjacent tearing claws are offset clockwise by a first preset distance in the circumferential direction of the tearing roller.

4. The slag agglomeration tearing and sorting machine as described in claim 1, characterized in that, The two soil-tearing rollers share the same adjustable speed motor, which drives the two soil-tearing rollers to rotate in the same direction simultaneously through a gear transmission mechanism.

5. The slag agglomeration tearing and sorting machine as described in claim 1, characterized in that, There is a preset gap between the tearing claws on the two tearing rollers.

6. The slag agglomeration tearing and sorting machine as described in claim 1, characterized in that, The slag fragment tearing and sorting machine also includes: Dust covers are respectively installed over the sorting structure and the tearing structure. The top of the sorting structure is an open opening to serve as the feed inlet of the slag agglomeration tearing and sorting machine, and the bottom of the tearing structure is an open opening to serve as the discharge outlet of the slag agglomeration tearing and sorting machine.

7. The slag agglomeration tearing and sorting machine as described in claim 6, characterized in that, The sorting structure is also provided with an openable door on one side, and a downwardly inclined guide plate is provided on the outside of the door. Alternatively, the sorting structure may also have an openable hood on one side; the sorting structure may also have an outer sorting frame and an inner sorting frame, with a plurality of screen bars disposed on the inner sorting frame, the outer sorting frame slidably connected to the sorting tearing frame, the outer sorting frame being slidably extended out of the hood, the inner sorting frame being rotatably connected to the outer sorting frame around a first direction or a second direction, and a recycling trough disposed on the side of the sorting tearing frame.

8. The slag agglomeration tearing and sorting machine as described in claim 1, characterized in that, The soil-tearing claw adopts a plate-like structure with a trapezoidal cross-section. The bottom end of the soil-tearing claw is fixed to the soil-tearing roller, and soil-tearing protrusions are respectively provided on the two axial sides of the top end of the soil-tearing claw.

9. The slag agglomeration tearing and sorting machine as described in claim 8, characterized in that, The soil-tearing protrusions are located on both axial sides of the top end of the soil-tearing claw on the side of the rotation direction of the soil-tearing roller.

10. The slag agglomeration tearing and sorting machine as described in claim 8, characterized in that, The soil-tearing protrusion and the soil-tearing claw are integrally formed.

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