Production equipment for smelting manganese-silicon alloy from semi-coke

Abstract

The production equipment for smelting the manganese-silicon alloy through the semi-coke comprises a batching device and a submerged arc furnace, the batching device is connected with the submerged arc furnace through a feeding mechanism, the batching device comprises a powder making machine, a material mixing mechanism, a sintering furnace, a crusher and a screening machine, and the powder making machine and a semi-coke feeding port both extend to the material mixing mechanism; the discharging end of the mixing mechanism is connected with a feeding port of the sintering furnace, and the sintering furnace is connected with the crusher and then connected with the screening machine. The submerged arc furnace comprises a reaction cavity, a cooling system and a waste heat treatment system, wherein the cooling system and the waste heat treatment system are arranged outside the reaction cavity. The waste heat treatment system comprises a tail gas treatment device and a slag waste heat treatment device. The micro-positive pressure in the reaction cavity is 0-100 pa; the submerged arc furnace discharges the electrode according to a preset time gradient; and sintering ore generated in the sintering furnace is treated and then is introduced into the submerged arc furnace for reduction reaction. The system structure of manganese-silicon alloy production equipment is optimized, the energy utilization rate of the equipment is increased, and the production stability of a reaction system is improved.

Description

Technical Field

[0001] The invention relates to the technical field of manganese silicon alloy production equipment, in particular to a production equipment for smelting manganese silicon alloy by blue coke. Background Art

[0002] Blue coke is made by burning clean coal blocks. As a new type of carbon material, it is superior to coke in terms of high fixed carbon, high specific resistivity, high chemical activity, low ash content, low aluminum, low sulfur and low phosphorus. It gradually replaces metallurgical coke and is widely used in the production of calcium carbide, ferroalloys, ferrosilicon, silicon carbide and other products, becoming an irreplaceable carbon material. For example, manganese oxide ore and silica can be used as reaction raw materials, and blue coke can be used as a reducing agent to produce a reduction reaction with the manganese oxide ore in the reactor to prepare manganese silicon alloy. The existing production equipment of the manganese silicon alloy is generally called an electric furnace, but the problems of the existing equipment are: the function of the batching device is single, the energy utilization rate of the electric furnace is low, resulting in insufficient practicality and production stability of the overall production equipment. Based on this, the present invention designs a production equipment for smelting manganese silicon alloy with blue coke to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to provide a production equipment for smelting manganese silicon alloy with blue coke to solve the problems raised by the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a production equipment for smelting manganese silicon alloy with semi-coke, comprising a batching device and a submerged arc furnace, wherein the batching device is connected to the submerged arc furnace through a feeding mechanism, and the batching device comprises: a pulverizer, a mixing mechanism, a sintering furnace, a crusher, and a screening machine, wherein the pulverizer and the semi-coke inlet both extend to the mixing mechanism, the discharge end of the mixing mechanism is connected to the inlet of the sintering furnace, and the sintering furnace is connected to the crusher and then to the screening machine;

[0005] The submerged arc furnace comprises a reaction chamber, and a cooling system and a waste heat treatment system arranged outside the reaction chamber, wherein the cooling system is arranged in sections outside the submerged arc furnace, and the waste heat treatment system comprises a tail gas treatment device and a slag waste heat treatment device, wherein the tail gas treatment device is arranged on the top of the submerged arc furnace, and the slag waste heat treatment device is arranged on the bottom of the submerged arc furnace;

[0006] The reaction chamber is set at a micro-positive pressure of 0-100 Pa; the submerged arc furnace is set to release electrodes according to a preset time gradient pressure; the sintered ore produced in the sintering furnace is processed and then used to pass into the submerged arc furnace for reduction reaction.

[0007] Optionally: the reaction temperature range in the blast furnace is: 1350-1400°C; the single pressure release amount of the electrode is Q≤2cm; the preset time gradient is: 1h, 1.5h, 2h.

[0008] Optionally: the exhaust gas treatment device includes a flue gas purification component and a power generation component, the flue gas is connected to the power generation component after passing through the flue gas purification component, and the power generation component is used to connect to the power storage device.

[0009] Optionally, the screening machine includes a shell, a driving assembly and a feed hole, the feed hole is integrally arranged at the top of the shell, a cover plate is provided on the left side of the top of the shell by hinge and on the right side by a lock, a partition is fixedly provided at the middle end of the shell, a crankshaft fixed on the right side of the motor of the driving assembly rotates and passes through the shell, connecting rods are rotatably sleeved on the left and right sides of the crankshaft, a sliding rod connected to the top of the connecting rod slides through the partition, and the filter screen is nested in the frame.

[0010] Optionally, sealing plates are provided on the upper and lower sides of the front end of the shell body; and a mounting plate made of non-metallic material is fixedly provided on the upper right end of the shell body.

[0011] Optionally, a worm sleeve is provided on the middle end fixing sleeve outside the crankshaft, and a worm wheel is provided on the outside of the worm sleeve by means of gear tooth meshing.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The present invention optimizes the system structure of manganese silicon alloy production equipment, improves the heat treatment system of the production equipment, and improves the energy utilization rate of the equipment;

[0014] 2. Improved the production stability of the manganese silicon alloy reaction system;

[0015] 3. The screening machine of the present invention can reciprocate the filter up and down along the direction of the shell through the design of the vibration function, thereby ensuring the stability of the filter when in use;

[0016] 4. The present invention can continuously cool the slag with the cooled liquid through the design of the liquid circulation function, thereby improving the cooling effect of the slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1A schematic diagram of the structure of a production equipment for smelting manganese silicon alloy from blue coke provided by the present invention;

[0019] Figure 2 A front three-dimensional schematic diagram of a screening machine in an embodiment of the present invention;

[0020] Figure 3 It is a three-dimensional schematic diagram of the interior of the screening machine in an embodiment of the present invention.

[0021] in:

[0022] 100: batching device; 200: submerged arc furnace;

[0023] 1: Shell; 2: Feed hole; 3: Cover plate; 4: Partition plate; 6: Drive assembly; 601: Motor; 602: Crankshaft; 603: Connecting rod; 604: Sliding rod; 605: Frame; 606: Filter; 8: Sealing plate; 9: Mounting plate; 13: Box body; 16: Semiconductor refrigerator; 18: Controller. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The present invention provides a production equipment for smelting manganese silicon alloy with semi-coke, comprising a batching device 100 and a submerged arc furnace 200, wherein the batching device 100 is connected to the submerged arc furnace 200 through a feeding mechanism, and the batching device 100 comprises: a pulverizer, a mixing mechanism, a sintering furnace, a crusher, and a screening machine, wherein the pulverizer and the semi-coke inlet are both extended to the mixing mechanism, the discharge end of the mixing mechanism is connected to the inlet of the sintering furnace, and the sintering furnace is connected to the crusher and then connected to the screening machine; the submerged arc furnace 200 comprises a reaction chamber and a Cooling system and waste heat treatment system. The cooling system is arranged in sections outside the ore-burning furnace 200. The waste heat treatment system includes a tail gas treatment device and a slag waste heat treatment device. The tail gas treatment device is arranged on the top of the ore-burning furnace 200, and the slag waste heat treatment device is arranged on the bottom of the ore-burning furnace 200. The reaction chamber is set at a micro-positive pressure of 0-100 Pa. The ore-burning furnace 200 is set to release the electrode according to a preset time gradient pressure. The sintered ore produced in the sintering furnace is treated and used to pass into the ore-burning furnace 200 for reduction reaction.

[0026] like Figure 1As shown, in the present invention, the front-end pulverizer crushes the incoming manganese ore to obtain ferromanganese ore powder, and then the ferromanganese ore powder and the blue carbon powder are mixed in the mixing mechanism and then enter the sintering furnace for sintering treatment, and then crushed into particles of target specifications after sintering, with a particle diameter of ≤80mm; wherein coal gas is used as fuel for sintering during the sintering process. In addition, the batching device 100 also includes a silica component, which is introduced into the batching device 100 as a reaction auxiliary material.

[0027] After the batching is completed in the batching device 100, the reaction raw materials are introduced into the ore-forming furnace 200, and a preset voltage is released to perform a reduction reaction.

[0028] In the present invention, because the ash melting point of lignite is ≥1250°C, the working temperature of the reducing agent in the submerged arc furnace 200 for smelting manganese silicon alloy is 1350-1400°C. When the temperature in the submerged arc furnace 200 is greater than the ash melting point of lignite, the lignite begins to decompose, and almost simultaneously the lignite as a reducing agent begins to produce a reduction reaction with the manganese oxide ore in the furnace.

[0029] In addition, the reaction temperature range in the ore-fired furnace 200 is: 1350-1400°C; the single pressure release amount of the electrode is Q≤2cm; and the preset time gradient is: 1h, 1.5h, 2h.

[0030] In the above, the voltage applied needs to ensure that the length of the working end of the electrode is 2.4-2.6m, to ensure the effective feeding depth, and to avoid heat loss caused by arc exposure. And the arc should be added in a small amount and in an appropriate amount, and the height of the arc column is standardized, which is required to be maintained at 4.8-5.1m; the electrode pressure and release amount should be adjusted in time according to the process parameters of the electric furnace to ensure that the electrode feeding depth is in a suitable position to maximize the use of thermal energy and electrical energy. In addition, the electrode pressure and release amount should not exceed 2cm each time. If the electric arc furnace is 200 long, the electrode can be pressed and released once every 1, 1.5, or 2 hours according to the real-time furnace conditions. This embodiment does not impose specific restrictions on the time difference of pressing and releasing the electrode, and can be adjusted according to actual adaptability. The present invention ensures that the blue coke is fully reduced in the reaction of making manganese silicon alloy using blue coke as a reducing agent. In addition, the arc design increases the production stability of the production equipment.

[0031] The exhaust gas treatment device includes a flue gas purification component and a power generation component. The flue gas is connected to the power generation component after passing through the flue gas purification component, and the power generation component is used to connect to the power storage device. That is, in the embodiment of the present invention, the waste heat in the flue gas is used for waste heat power generation after preliminary purification, so as to utilize the heat in the flue gas to improve the energy utilization rate of the production equipment. At the same time, it also includes further processing and purifying the flue gas after power generation into safe gas that can be discharged.

[0032] In summary, the present invention optimizes the system structure of the manganese silicon alloy production equipment, improves the heat treatment system of the production equipment, and improves the energy utilization rate of the equipment; at the same time, it improves the production stability of the manganese silicon alloy reaction system.

[0033] It should be noted that, in this embodiment, there is no specific limitation on the structures of the tail gas treatment device and the slag treatment device, and the treatment may be performed with reference to relevant existing tail gas treatment devices.

[0034] The following is combined with Figure 2 and Figure 3 The screening machine of the present invention is described in detail:

[0035] The screening machine in the present invention includes a shell 1 and a feed hole 2, the feed hole 2 is integrally arranged at the top of the shell 1, a cover plate 3 is hinged on the left side of the top of the shell 1 and locked on the right side, a partition 4 is fixedly arranged at the middle end of the shell 1, and a driving assembly 6 arranged on the outer wall of the shell 1 includes a motor 601 fixedly arranged at the lower end of the left side of the outside of the shell 1, a crankshaft 602 fixedly arranged on the right side of the motor 601 rotates and passes through the shell 1, a connecting rod 603 is rotatably sleeved on the left and right sides of the crankshaft 602, a sliding rod 604 connected to the top of the connecting rod 603 slides through the partition 4, a frame 605 fixedly arranged on the top of the sliding rod 604 is slidably connected to the shell 1, and a filter screen 606 is nested in the frame 605.

[0036] The operator pours the slag into the shell 1 through the feed hole 2, closes the cover plate 3 and then turns on the motor 601. The motor 601 drives the crankshaft 602 to drive the connecting rod 603, the linkage slide rod 604, the frame 605 and the filter screen 606 to move up and down reciprocatingly along the direction of the shell 1, so that the filter screen 606 can screen out impurities in the slag, so that the impurities can pass through the filter screen 606 and be discharged into the lower end of the shell 1. In this way, not only can impurities be prevented from clogging the filter screen 606, but also the smoothness of impurities passing through the filter screen 606 and being discharged into the lower end of the shell 1 can be ensured.

[0037] In addition, sealing plates 8 are provided on the upper and lower sides of the front end of the outer shell 1, and the left side of the sealing plate 8 is hingedly connected to the shell 1, and the right side of the sealing plate 8 is lockably connected to the shell 1. A non-metallic mounting plate 9 is fixedly provided at the upper right end of the outer shell 1. A box body 13 is fixedly provided at the rear end of the inner shell 1, a water pump is fixedly provided at the top of the box body 13, a water pipe is fixedly provided at the bottom of the water pump and passes through the box body 13, a semiconductor refrigerator 16 is fixedly provided at the top, and a connecting pipe of the water pump is fixedly provided and passes through the shell 1. A controller 18 is fixedly provided on the outer wall of the shell 1, and the controller 18 is electrically connected to the motor 601 and the semiconductor refrigerator 16.

[0038] It can be implemented that a worm sleeve is provided on the fixed sleeve at the middle end of the crankshaft 602, and a worm wheel is provided on the outside of the worm sleeve by means of gear meshing. The rotation of the crankshaft 602 drives the filter screen 606 to vibrate and screen the slag.

[0039] As can be seen from the above, when the staff turns on the motor 601, the water pump and the semiconductor refrigerator 16 are turned on, and the semiconductor refrigerator 16 cools the liquid inside the box body 13, and the water pump discharges the cold liquid into the shell 1, that is, the cooling liquid cools the slag, and the cooled liquid and the slag pass through the filter 606 and are discharged into the lower end of the shell 1. At this time, the liquid in the shell 1 can flow back to the inside of the box body 13, ensuring that the liquid is in a circulating manner to cool the slag. In addition, a one-way valve can be set to prevent the liquid inside the box body 13 from being discharged into the shell 1.

[0040] The motor 601 drives the crankshaft 602 to drive the worm sleeve, the worm wheel and the rotating rod to rotate. When the slag is cooled, the water pump is turned off first, and the motor 601 is controlled to stop running by the controller 18. At this time, the sealing plate 8 is opened to take the slag out of the shell 1.

[0041] From the foregoing, it can be seen that the screening machine in the present invention moves the filter screen 606 up and down reciprocatingly along the direction of the shell, thereby ensuring the stability of the filter screen 606 when in use; in addition, the present invention can continuously cool the slag with the cooled liquid through the design of the liquid circulation function, thereby improving the cooling effect of the slag.

[0042] Finally, the present invention provides a production equipment for smelting manganese silicon alloy with lignite, including a batching device 100 and an induction furnace 200. The batching device 100 is connected to the induction furnace 200 through a feeding mechanism. The batching device 100 includes: a powder making machine, a mixing mechanism, a sintering furnace, a crusher, and a screening machine. The powder making machine and the lignite inlet both extend to the mixing mechanism. The discharge end of the mixing mechanism is connected to the inlet of the sintering furnace. The sintering furnace is connected to the crusher and then to the screening machine; the induction furnace 200 includes a reaction chamber and a cooling system and a waste heat treatment system arranged outside the reaction chamber. The waste heat treatment system includes a tail gas treatment device and a slag waste heat treatment device; the reaction chamber is set at a micro-positive pressure of 0-100 Pa; the induction furnace 200 is set to release the electrode according to a preset time gradient pressure; the sintered ore produced in the sintering furnace is treated and then passed into the induction furnace 200 for a reduction reaction. The present invention optimizes the system structure of manganese silicon alloy production equipment, improves the energy utilization rate of the equipment, and improves the production stability of the reaction system.

Claims

1. A production device for smelting manganese silicon alloy with blue coke, comprising a batching device (100) and a submerged arc furnace (200), wherein the batching device (100) is connected to the submerged arc furnace (200) via a feeding mechanism, and is characterized in that: The batching device (100) comprises: a powder making machine, a mixing mechanism, a sintering furnace, a crusher, and a screening machine, wherein the powder making machine and the blue coal inlet both extend to the mixing mechanism, the discharge end of the mixing mechanism is connected to the inlet of the sintering furnace, and the sintering furnace is connected to the crusher and then to the screening machine; The submerged arc furnace (200) comprises a reaction chamber, and a cooling system and a waste heat treatment system arranged outside the reaction chamber, the cooling system being arranged in sections outside the submerged arc furnace (200), the waste heat treatment system comprising a tail gas treatment device and a slag waste heat treatment device, the tail gas treatment device being arranged at the furnace top of the submerged arc furnace (200), and the slag waste heat treatment device being arranged at the furnace bottom of the submerged arc furnace (200); The reaction chamber is set at a micro-positive pressure of 0-100 Pa; the submerged arc furnace (200) is set to release electrodes according to a preset time gradient pressure; and the sintered ore produced in the sintering furnace is processed and then introduced into the submerged arc furnace (200) for a reduction reaction.

2. The production equipment for smelting manganese silicon alloy by using blue coke according to claim 1, characterized in that: The reaction temperature range in the ore-fired furnace (200) is: 1350-1400° C.; the single pressure release amount of the electrode is Q≤2 cm; and the preset time gradient is: 1 h, 1.5 h, 2 h.

3. The production equipment for smelting manganese silicon alloy by using blue coke according to claim 2, characterized in that: The exhaust gas treatment device includes a flue gas purification component and a power generation component. The flue gas is connected to the power generation component after passing through the flue gas purification component. The power generation component is used to connect to the power storage device.

4. The production equipment for smelting manganese silicon alloy by using blue coke according to claim 1, characterized in that: The screening machine comprises a shell (1), a driving assembly (6) and a feed hole (2), wherein the feed hole (2) is integrally arranged at the top of the shell (1), a cover plate (3) is provided on the left side of the top of the shell (1) by hinge connection and on the right side by lock, a partition plate (4) is fixedly provided at the middle end of the shell (1), a crankshaft (602) fixedly provided on the right side of the motor (601) of the driving assembly (6) rotates and passes through the shell (1), connecting rods (603) are sleeved on the left and right sides of the crankshaft (602), a sliding rod (604) connected to the top of the connecting rod (603) slides and passes through the partition plate (4), and a filter screen (606) is nested in a frame (605).

5. The production equipment for smelting manganese silicon alloy by using blue coke according to claim 4, characterized in that: Sealing plates (8) are provided on the upper and lower sides of the front end of the shell (1); and a mounting plate (9) made of non-metallic material is fixedly provided on the upper right end of the shell (1).

6. The production equipment for smelting manganese silicon alloy by using blue coke according to claim 4, characterized in that: A worm sleeve is provided on the fixed sleeve at the middle end of the crankshaft (602), and a worm wheel is provided on the outside of the worm sleeve in a gear-meshing manner.

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