Processing system for preparing sodium silicate from iron tailing sand

Abstract

The invention provides a processing system for preparing sodium silicate by using iron tailing sand. The device comprises a primary screening module for receiving crushed particles of a solid sodium silicate crude product and screening and rolling the crushed particles, a reaction tank for receiving the crushed particles treated by the primary screening module, a stirrer for stirring the interior of the reaction tank, a first quantitative liquid inlet device for quantitatively adding pure water into the reaction tank, and a second quantitative liquid inlet device for quantitatively adding pure water into the reaction tank, the heater is used for heating the reaction tank, the circulating flow module is used for discharging filtered-out substances in the reaction tank out of the reaction tank and simultaneously storing filtrate in the reaction tank, the liquid discharge pipe is used for discharging liquid sodium silicate in the reaction tank out of the reaction tank, and the discharge valve is used for controlling the communication condition of the liquid discharge pipe and the reaction tank. The efficient screening and rolling design is adopted, and the preparation efficiency of a sodium silicate product is improved through wave type airflow output, ultrasonic vibration and dynamic limiting plate adjustment.

Description

Technical Field

[0001] The invention relates to the technical field of sodium silicate production, and in particular to a processing system for preparing sodium silicate by utilizing iron tailings sand. Background Art

[0002] Iron tailings are solid wastes generated in the mineral processing process and are an important part of global industrial solid wastes. According to statistics, more than 10 billion tons of tailings and waste rocks are discharged worldwide each year, of which the comprehensive utilization rate of tailings in my country is only 7%, and the amount of stockpiled iron tailings is as high as more than 10 billion tons, accounting for nearly one-third of the total amount of tailings. These stockpiled iron tailings not only occupy a large amount of land resources, but also may cause pollution to the environment. Therefore, how to efficiently utilize iron tailings resources has become a research hotspot in the current industry and academia. The present invention is committed to the comprehensive utilization of solid wastes, focusing on solving the problem of high-value utilization of iron tailings. After the separated iron tailings sand is mixed with sodium hydroxide, a melting reaction is carried out at 700-850°C, and the high temperature is maintained for 30-40 minutes to obtain a solid sodium silicate crude product. It is then dissolved in warm water at 60-80°C, and a high-purity sodium silicate solution can be obtained by simple filtration, and solid sodium silicate is obtained by further removing water. The innovation of the present invention lies in that high-iron content iron tailings sand is used as raw material for the first time, which not only reduces the accumulation of solid waste, but also realizes the high-value utilization of iron tailings; a process for rapid preparation of sodium silicate at low temperature is developed, with a melting time as short as 30-40 minutes; and efficient and low-energy post-treatment is achieved through warm water dissolution and simple filtration to obtain a high-purity sodium silicate product.

[0003] This experimental team has been browsing and studying a large amount of relevant records and materials on the relevant technologies of iron tailings processing for a long time. At the same time, relying on relevant resources and conducting a large number of relevant experiments, after a large number of searches, it was found that the existing prior art such as CN104556079B, CN113058284B, CN113731624B, and CN117599891A disclosed in the prior art, such as a granulation crystallization device used in the preparation process of sodium metasilicate disclosed in the prior art, which relates to the technical field of sodium metasilicate production equipment, including a crystallization tank, a discharging mechanism, a granulation crystallization mechanism, and a wall scraping mechanism. A motor is arranged at the top of the crystallization tank, a slag discharge pipe is arranged at the bottom end of the crystallization tank, a slag discharge valve is arranged on one side of the outer wall of the slag discharge pipe, and a coolant inlet pipe, a raw liquid feed pipe, and a seed feed pipe are arranged on one side of the outer wall of the crystallization tank. The present invention can realize the rapid separation of crystal particles by arranging a crystallization tank, a crystallization bin, a motor, a filter plate, a water absorption cylinder, a water absorption slot hole, a rotating shaft, a spiral blade, a No. 1 connecting rod, a stirring rod, a No. 2 connecting rod, a vertical scraper, a stock solution feeding pipe and a seed crystal feeding pipe, thereby effectively improving the working efficiency of sodium metasilicate crystallization.

[0004] The present invention is made to solve the problems commonly found in the art, such as reliance on fixed physical and mechanical designs without integrated intelligent sensors or data acquisition modules, inability to collect key parameters in the production process in real time, lack of intelligent feedback mechanism, inability to automatically adjust parameters to optimize production efficiency according to changes in the production process, which may lead to unstable product quality, etc. Summary of the invention

[0005] The purpose of the present invention is to propose a processing system for preparing sodium silicate by using iron tailings sand in view of the shortcomings existing in the current art.

[0006] In order to overcome the shortcomings of the prior art, the present invention adopts the following technical solutions:

[0007] A processing system for preparing sodium silicate using iron tailings sand, the preparation steps of preparing sodium silicate using iron tailings sand include:

[0008] Step 1: Mix the iron ore tailings and sodium hydroxide evenly and send them to the horseshoe flame kiln for melting reaction at 700-850 degrees Celsius.

[0009] Step 2: After the iron ore tailings and sodium hydroxide are melted, the resulting molten material is retained in the furnace for 30-40 minutes to obtain a solid crude sodium silicate product, which is then crushed into crushed particles by a crusher.

[0010] Step 3: Add pure water to the crushed particles and slowly heat them to 60-80 degrees Celsius to dissolve them to obtain a solution, filter out the filtrate in the solution, and take the filtrate of the solution as liquid sodium silicate.

[0011] Step 4: adding a mixed acid solution dropwise to the liquid sodium silicate to produce a snowflake-shaped silicic acid precipitate to obtain a mixed solution, wherein the mixed acid is selected from any one of sulfuric acid, hydrochloric acid and nitric acid or a combination of two or more thereof,

[0012] Step 5: Wash the silicic acid precipitate in the mixed solution twice with pure water and filter it to obtain a white filter cake crude product.

[0013] Step 6: Dehydrating the white filter cake at a temperature below 60 degrees Celsius to obtain ultra-pure silicon dioxide solid powder;

[0014] Characterized in that the processing system for preparing sodium silicate using iron tailings sand comprises:

[0015] A primary screening module for receiving the crushed particles and screening and crushing the crushed particles, a reaction tank for receiving the crushed particles after being processed by the primary screening module, an agitator for stirring the reaction tank, a first quantitative liquid inlet for quantitatively adding pure water into the reaction tank, a heater for heating the reaction tank, a circulation module for discharging the filtrate in the reaction tank to the outside of the reaction tank and retaining the filtrate in the reaction tank, a drain pipe for discharging the liquid sodium silicate in the reaction tank to the outside of the reaction tank, and a discharge valve for controlling the connectivity between the drain pipe and the reaction tank.

[0016] Furthermore, the primary screening module includes a box body with connecting openings at the upper and lower ends, a funnel piece connected to the lower end of the box body at the top and connected to the reaction tank at the bottom, a fixed frame sleeved on the outer wall of the box body, a buffer spring column fixedly connected to the fixed frame at the top and fixedly connected to the top wall of the reaction tank at the bottom, a filter plate horizontally arranged in the box body, a movable plate horizontally penetrating one of the side walls of the box body and having an air flow channel inside, a rolling assembly fixed to the movable plate for repeatedly rolling the crushed particles on the filter plate, a plurality of ultrasonic generators respectively laid on the outer walls of the box body, a mobile drive unit for driving the movable plate to move horizontally back and forth, and an air intake unit for conveying air flow to the air flow channel in the movable plate.

[0017] Furthermore, a through hole is arranged on the side wall of the box body, and the movable plate is arranged to pass through the through hole horizontally. Balls are evenly embedded on the inner wall of the through hole, and the balls reduce the resistance of the movable plate during horizontal movement.

[0018] Furthermore, the mobile driving unit includes a vertical plate located outside the box and vertically fixed to the bottom wall of the mobile plate, a linear hydraulic motor fixed to the side wall of the box through a corresponding mounting seat and capable of horizontal telescopic movement, and a locking member for fixing the driving end of the linear hydraulic motor to the vertical plate. The linear hydraulic motor drives the mobile plate to perform smooth horizontal reciprocating motion in the through-opening through a telescopic action.

[0019] Furthermore, the rolling assembly includes a base plate located in the box body and horizontally laid on the bottom wall of the movable plate, at least two rolling rollers rotatably fixed to the bottom of the base plate through corresponding bearing seats, a limit plate vertically arranged below the base plate, a telescopic driving member whose top end is fixedly connected to the base plate and whose bottom end is fixedly connected to the limit plate, and an insulating sleeve sleeved on the outer wall of the telescopic driving member, and the initial posture of the rolling assembly is the posture of the limit plate abutting against the box side wall provided with the through hole;

[0020] The main function of the limit plate is to intercept the crushed particles that have not been crushed to the preset particle size, and accumulate them in the rolling area between the rolling roller and the box body to form a high-density crushed particle layer to improve the rolling efficiency of the rolling roller. At the same time, during the operation of the rolling assembly, the limit plate can be controlled to dynamically intercept the crushed particles of different particle sizes through the extension drive of the telescopic drive member to improve the rolling efficiency of the crushed particles by the rolling assembly;

[0021] The insulating sleeve is a folded tube structure formed by connecting a plurality of annular folded corrugations. The insulating sleeve can freely expand or contract with the movement of the telescopic drive member. At the same time, the insulating sleeve is made of silicone coated fiber cloth and has dustproof and tear-resistant properties.

[0022] Furthermore, the movable plate includes a plate body, air outlet holes evenly distributed on the bottom wall of the plate body, connecting holes arranged on the side walls of the plate body, a main air flow channel horizontally arranged inside the plate body and connected to the connecting holes, a branch flow channel vertically extending from the main air flow channel to each air outlet hole in sequence, and an air inlet pipe airtightly connected to the connecting holes;

[0023] The bottom wall of the movable plate is divided into a left side where the vertical plate is fixed and a right side where the rolling assembly is fixed by the limiting plate, and the air outlet is correspondingly arranged in the area on the left side of the movable plate.

[0024] Furthermore, the air intake unit includes a compressed air pump mounted on the side wall of the box body through a corresponding fixed base, a connecting pipe for connecting the air outlet of the compressed air pump with the air intake pipe so that each air outlet generates an airflow of a preset strength, and a control unit for controlling the negative pressure air pump to output the airflow.

[0025] Furthermore, the control unit controls the compressed air pump to output the air flow velocity P(t) according to the operation time of the linear hydraulic motor:

[0026]

[0027] Among them, t is the continuous working time of the linear hydraulic pressure, P(t) is the air flow velocity output by the compressed air pump corresponding to the continuous working time t of the linear hydraulic pressure, and the unit of t is seconds, Qmin is the minimum air flow velocity output by the compressed air pump, which is not limited here, the unit of Qmin is square meters per second, A is the range of air flow intensity variation, and A∈[0.5×Qmin,2×Qmin], u is the period adjustment factor, the unit of u is seconds, u∈[1 second,10 seconds], and in order to avoid the air outlet being blocked by dust particles, Qmin is set greater than 0.

[0028] The beneficial effects achieved by the present invention are:

[0029] 1. The present invention adopts an efficient screening and rolling design, and improves the uniformity and dissolution efficiency of the crushed particles through wave-like airflow output, ultrasonic vibration and dynamic limit plate adjustment, ensuring the high purity and stability of the sodium silicate product, effectively solving the problem of the difficulty in efficient utilization of iron tailings, and effectively improving the utilization of solid waste resources and green production.

[0030] 2. The processing system of the present invention realizes precise optimization of the particle size of crushed particles through dynamic adjustment and intelligent control, significantly improves the uniformity and dissolution efficiency of the crushed particles, thereby greatly improving the preparation efficiency of sodium silicate. The processing system of the present invention adopts efficient crushing and screening design, reduces manual intervention, and improves the degree of automation and stability of equipment operation. The system has wide applicability and provides efficient technical support for enhancing the industrial value of preparing sodium silicate from iron tailings resources.

[0031] 3. In the process of rolling and screening, the present invention combines wave airflow, ultrasonic vibration and dynamic rolling components to improve the processing efficiency of crushed particles. The high-strength material and precision processing of the filter plate ensure the durability and accuracy of the equipment. The intelligent adjustment and dynamic adaptability of the overall system provide a stable, efficient and energy-saving solution for the efficient screening of iron tailings and the preparation of sodium silicate in industry.

[0032] 4. The present invention not only improves the utilization rate of the dissolved solution through precise separation of the filtrate and the filtrate, but also significantly improves the reaction efficiency and product purity of the sodium silicate preparation, significantly improves the utilization efficiency of iron tailings resources and the reaction efficiency of sodium silicate preparation, solves the problem that iron tailings are difficult to effectively utilize, and provides an environmentally friendly, efficient and economical technical solution for the production of sodium silicate. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0034] Figure 1 It is a partial structural schematic diagram of a processing system for preparing sodium silicate using iron tailings sand according to the present invention.

[0035] Figure 2 It is a partial structural schematic diagram of the primary screening module of the present invention.

[0036] Figure 3 This is a schematic diagram of the structure of the rolling assembly of the present invention.

[0037] Figure 4 It is another structural schematic diagram of the rolling assembly of the present invention.

[0038] Figure 5 It is a structural schematic diagram of the movable plate of the present invention.

[0039] Figure 6 It is a partial structural schematic diagram of the filter cartridge of the present invention.

[0040] Figure 7 This is an experimental deduction diagram of the air flow velocity output by the compressed air pump of the present invention.

[0041] Explanation of the accompanying figures: 1-box; 2-fixed frame; 3-buffer spring column; 4-agitator; 5-reaction tank; 6-drain pipe; 7-circulation pipe; 8-liquid inlet pipe; 9-filter cartridge; 10-movable plate; 11-bearing seat; 12-rolling roller; 13-filter plate; 14-funnel piece; 15-linear hydraulic motor; 16-vertical plate; 17-telescopic drive member; 18-base plate; 19-limiting plate; 20-isolating sleeve; 21-inlet pipe; 22-plate body; 23-air outlet; 24-diversion channel; 25-main air flow channel; 26-cylinder body; 27-slant interception plate; 28-arc interception plate. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is further described in detail in combination with its embodiments below; it should be pointed out that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present case. For those skilled in the art, after reviewing the following detailed description, other systems, methods and / or features of this embodiment will become apparent. And the terms describing the positional relationship in the accompanying drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0043] Embodiment 1: Combining with Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 , Attachment Figure 6 and attached Figure 7 This embodiment constructs a processing system for preparing sodium silicate using iron tailings, wherein the preparation steps of preparing sodium silicate using iron tailings include:

[0044] Step 1: Mix the iron ore tailings and sodium hydroxide evenly and send them to a horseshoe flame kiln for melting reaction at 700-850 degrees Celsius;

[0045] Step 2: After the iron ore tailings and sodium hydroxide are melted, the resulting molten material is retained in the furnace for 30-40 minutes to obtain a solid crude sodium silicate product, and the solid crude sodium silicate product is crushed into crushed particles by a crusher;

[0046] Step 3: adding pure water to the crushed particles and slowly heating to 60-80 degrees Celsius to dissolve them to obtain a solution, filtering out the filtrate in the solution, and taking the filtrate of the solution as liquid sodium silicate;

[0047] Step 4: adding a mixed acid solution dropwise to the liquid sodium silicate to produce a snowflake-shaped silicic acid precipitate to obtain a mixed solution, wherein the mixed acid is selected from any one of sulfuric acid, hydrochloric acid and nitric acid or a combination of two or more thereof;

[0048] Step 5: Wash the silicic acid precipitate in the mixed solution twice with pure water and then filter to obtain a white filter cake crude product;

[0049] Step 6: Dehydrate the white filter cake at a temperature below 60 degrees Celsius to obtain ultra-pure silica solid powder.

[0050] The processing system for preparing sodium silicate using iron tailings sand includes: a primary screening module for receiving the crushed particles and screening and rolling the crushed particles, a reaction tank for receiving the crushed particles after being processed by the primary screening module, an agitator for stirring the reaction tank, a first quantitative liquid inlet for quantitatively adding pure water into the reaction tank, a heater for heating the reaction tank, a circulation module for discharging the filtrate in the reaction tank to the outside of the reaction tank and retaining the filtrate in the reaction tank, a drain pipe for discharging the liquid sodium silicate in the reaction tank to the outside of the reaction tank, and a discharge valve for controlling the connection between the drain pipe and the reaction tank.

[0051] The processing system screens and crushes the crushed particles through the primary screening module, and the processed crushed particles enter the reaction tank. At the same time, the first quantitative liquid inlet accurately controls the injection of pure water into the reaction tank, and the heater raises the temperature in the reaction tank to 60-80 degrees Celsius. Under the uniform stirring action of the agitator, the crushed particles are dissolved in the dissolution tank to obtain a dissolved liquid.

[0052] The heater is a heating device of the prior art and will not be described in detail again. The primary screening module includes a box body with connecting openings at the upper and lower ends, a funnel piece connected to the lower end of the box body at the top and connected to the reaction tank at the bottom, a fixed frame sleeved on the outer wall of the box body, a buffer spring column with a top end connected and fixed to the fixed frame and a bottom end fixed to the top wall of the reaction tank, a filter plate horizontally arranged in the box body, a movable plate horizontally penetrating one of the side walls of the box body and having an air flow channel inside, a rolling assembly fixed to the movable plate for repeatedly rolling the crushed particles on the filter plate, a plurality of ultrasonic generators respectively laid on the outer walls of the box body, a mobile drive unit for driving the movable plate to move horizontally back and forth, and an air intake unit for conveying air flow to the air flow channel in the movable plate.

[0053] A through hole is arranged on the side wall of the box body, and the movable plate is arranged to pass through the through hole horizontally. Balls are evenly embedded on the inner wall of the through hole, and the balls reduce the resistance of the movable plate during horizontal movement.

[0054] The mobile driving unit includes a vertical plate located outside the box and vertically fixed to the bottom wall of the moving plate, a linear hydraulic motor fixed to the side wall of the box through a corresponding mounting seat and capable of horizontal telescopic movement, and a locking member for fixedly connecting the driving end of the linear hydraulic motor to the vertical plate. The linear hydraulic motor drives the moving plate to perform smooth horizontal reciprocating motion in the through-opening through a telescopic action.

[0055] The rolling assembly includes a base plate located in the box body and horizontally laid on the bottom wall of the movable plate, at least two rolling rollers rotatably fixed to the bottom of the base plate through corresponding bearing seats, a limiting plate vertically arranged below the base plate, a telescopic driving member whose top end is fixedly connected to the base plate and whose bottom end is fixedly connected to the limiting plate, and an insulating sleeve mounted on the outer wall of the telescopic driving member, and the initial posture of the rolling assembly is the posture in which the limiting plate is abutted against the side wall of the box provided with a through opening.

[0056] The main function of the limit plate is to intercept the crushed particles that have not been crushed to the preset particle size, and accumulate them in the rolling area between the rolling roller and the box to form a high-density crushed particle layer to improve the rolling efficiency of the rolling roller. At the same time, during the operation of the rolling assembly, the extension drive of the telescopic drive member can control the limit plate to dynamically intercept the crushed particles of different particle sizes to improve the rolling efficiency of the rolling assembly on the crushed particles.

[0057] The isolation sleeve is a folded cylinder structure formed by connecting a plurality of annular folded corrugations. The isolation sleeve can freely expand or contract with the movement of the telescopic drive member. At the same time, the isolation sleeve is made of silicone coated fiber cloth, which has dustproof and tear-resistant properties and is suitable for complex dust and particle working environments. The flexible structure of the isolation sleeve can effectively isolate the telescopic drive member from erosion by particles, dust and liquids, thereby extending the service life of the telescopic drive member and ensuring the smoothness of the movement of the telescopic drive member. The rolling rods are arranged in parallel.

[0058] The processing system of the present invention realizes accurate optimization of the particle size of crushed particles through dynamic adjustment and intelligent control, significantly improves the uniformity and dissolution efficiency of the crushed particles, and thus greatly improves the preparation efficiency of sodium silicate. The processing system of the present invention adopts efficient crushing and screening design, reduces manual intervention, and improves the degree of automation and stability of equipment operation. The system has wide applicability and provides efficient technical support for enhancing the industrial value of preparing sodium silicate from iron tailings resources.

[0059] Embodiment 2: Combining with Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 , Attachment Figure 6 and attached Figure 7 In addition to the contents of the above embodiments, the movable plate includes a plate body, air outlet holes evenly distributed on the bottom wall of the plate body, connecting holes arranged on the side walls of the plate body, a main air flow channel horizontally arranged inside the plate body and connected with the connecting holes, branch channels vertically extending from the main air flow channel to each air outlet hole in sequence, and an air inlet pipe airtightly connected with the connecting holes.

[0060] Among them, the bottom wall of the movable plate is divided into a left side where the vertical plate is fixed and a right side where the rolling assembly is fixed by the limiting plate, and the air outlet is correspondingly arranged in the area on the left side of the movable plate. The air intake unit includes a compressed air pump installed on the side box wall of the box body through a corresponding fixed base, a connecting pipe that connects the air outlet end of the compressed air pump with the air inlet pipe so that each air outlet generates an airflow of preset intensity, and a control unit for controlling the negative pressure air pump to output the airflow.

[0061] The control unit controls the compressed air pump to output the air flow velocity P(t) according to the operation time of the linear hydraulic motor:

[0062]

[0063] Wherein, t is the continuous working time of the linear hydraulic pressure, P(t) is the air flow velocity output by the compressed air pump corresponding to the continuous working time t of the linear hydraulic pressure, and the unit of t is seconds, Qmin is the minimum air flow velocity output by the compressed air pump, the unit of Qmin is square meters per second, A is the air flow intensity variation range, and A∈[0.5×Qmin,2×Qmin], u is the period adjustment factor, the unit of u is seconds, u∈[1 second,10 seconds], and in order to avoid the air outlet being blocked by dust particles, Qmin is set to be greater than 0. The specific value of Qmin is determined by those skilled in the art based on actual needs and the actual operating conditions of the compressed air pump, and is not limited here.

[0064] The control unit enables the compressed air pump to generate wave-like intensity airflow fluctuations with a cycle of 2u during the operation of the rolling component. The control unit is used to control the compressed air pump to generate wave-like intensity airflow, and drive the crushed particles on the screen plate to move through periodic changes, thereby reducing the screening blind area and making the rolling and screening process of the rolling component more efficient.

[0065] The steps of crushing the crushed particles by the primary screening module are as follows:

[0066] S101: crushed particles enter the box of the primary screening module;

[0067] S102: A plurality of ultrasonic generators are arranged on the outer wall of the box, and the vibration signals of the ultrasonic generators and the support of the buffer spring columns are used to promote the dispersion and screening of the crushed particles in the box;

[0068] S103: The linear hydraulic motor in the mobile drive unit drives the rolling assembly to move horizontally back and forth from the initial posture, and the rolling roller can rotate freely under the support of the bearing seat. When the moving plate moves back and forth, the rolling roller repeatedly rolls the crushed particles on the filter plate to crush the larger crushed particles;

[0069] S104: The air outlet outputs a wave-like airflow P(t) controlled by a compressed air pump to further disperse the particles, prevent the crushed particles in the filter plate from being accumulated and blocked, and further promote the dispersion and screening of the crushed particles in the box;

[0070] s105: The crushed particles pass through the sieve plate and enter the reaction tank.

[0071] The cross-sectional areas of the funnel pieces decrease from top to bottom. The filter plate is made of wear-resistant alloy steel. The thickness of the filter plate is more than 10 mm, and it has excellent wear resistance and strength. The filter holes on the filter plate are evenly distributed, and the spacing between the filter holes is 2 mm. The filter holes are processed by laser cutting technology to ensure that the aperture is accurate and the hole edges are smooth and burr-free. The surface of the filter plate is quenched to improve wear resistance and impact resistance. The hardness of the filter plate reaches HRC50, which can effectively resist the crushing and wear of iron tailings particles.

[0072] The present invention combines wave airflow, ultrasonic vibration and dynamic rolling components in the rolling and screening process to improve the processing efficiency of crushed particles. The high-strength material and precision processing of the filter plate ensure the durability and accuracy of the equipment. The intelligent adjustment and dynamic adaptability of the overall system provide a stable, efficient and energy-saving solution for the efficient screening of iron tailings and the preparation of sodium silicate in industry.

[0073] Embodiment 3: Combining with Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 , Attachment Figure 6 and attached Figure 7 In addition to the contents of the above embodiments, the circulation module includes a circulation pipe, a liquid expelling pump, a filter cartridge and a liquid inlet pipe, the filter cartridge includes a cylinder body and an interception net horizontally arranged inside the cylinder body, and the filter cartridge is arranged adjacent to the reaction tank.

[0074] One end of the circulation tube is connected to the bottom of the reaction tank and the other end extends to the top of the filter cartridge. The circulation tube is used to drain the dissolved liquid in the reaction tank to the filter cartridge.

[0075] The liquid discharge pump is used to drive the dissolved liquid in the reaction tank to flow from the circulation pipe to the filter cartridge. One end of the liquid inlet pipe is connected to the bottom of the filter cartridge, and the other end of the liquid inlet pipe is connected to the side wall of the reaction tank. The other end of the liquid inlet pipe is higher than the upper limit liquid level of the reaction tank.

[0076] The interception net is provided with interception holes for intercepting the filtrate. The filtrate in the dissolved liquid flows back into the reaction tank through the liquid inlet pipe after passing through the filter cartridge, and the filtrate in the mixed liquid is intercepted in the filter cartridge.

[0077] The interception net comprises an arc interception piece with an arc structure and two inclined interception pieces symmetrically fixed at both ends of the arc interception piece. The middle part of the arc interception piece is relatively protruding upward and the end of the arc interception piece is relatively extending downward.

[0078] The relatively lower end of the sloped intercepting piece is used to be connected and fixed to the arc intercepting piece, while the relatively upper end of the sloped intercepting piece is connected and fixed to the inner tank wall of the reaction tank.

[0079] The arc design of the arc interception piece combined with the inclination angle of the sloped interception piece allows the intercepted particles to be evenly distributed on both sides of the cylinder to avoid material accumulation in a single area of ​​the interception net. The upward protruding design of the middle part of the arc interception piece provides a priority channel for the filtrate, which helps to quickly discharge the filtrate, reduce the filtrate retention time, and increase the filtration speed of the filtrate.

[0080] The arc interception piece disperses the impact force from the particles, avoiding single-point force damage to the arc interception piece. At the same time, the inclined interception piece transfers part of the particle load to the inner wall of the cylinder, further enhancing the stability of the overall structure of the interception net.

[0081] The present invention not only improves the utilization rate of the dissolved solution by accurately separating the filtrate from the filtrate, but also significantly improves the reaction efficiency and product purity of the sodium silicate preparation, significantly improves the utilization efficiency of iron tailings resources and the reaction efficiency of the sodium silicate preparation, solves the problem that the iron tailings are difficult to effectively utilize, and provides an environmentally friendly, efficient and economical technical solution for the production of sodium silicate.

[0082] Although the present invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the present invention. That is, the methods, systems and devices discussed above are examples. Various configurations may appropriately omit, replace or add various processes or components. For example, in alternative configurations, the method may be performed in an order different from that described, and / or various components may be added, omitted and / or combined. Moreover, the features described with respect to certain configurations may be combined in various other configurations, such as different aspects and elements of the configuration may be combined in a similar manner. In addition, as technology develops, the elements therein may be updated, i.e., many elements are examples and do not limit the scope of the present disclosure or claims. And it should be understood that after reading the contents of the record of the present invention, the technician may make various changes or modifications to the present invention, and these equivalent changes and modifications also fall within the scope defined by the claims of the present invention.

Claims

1. A processing system for preparing sodium silicate using iron tailings, wherein the steps for preparing sodium silicate using iron tailings include: Step 1: Mix the iron ore tailings and sodium hydroxide evenly and send them to the horseshoe flame kiln for melting reaction at 700-850 degrees Celsius. Step 2: After the iron ore tailings and sodium hydroxide are melted, the resulting molten material is retained in the furnace for 30-40 minutes to obtain a solid crude sodium silicate product, which is then crushed into crushed particles by a crusher. Step 3: Add pure water to the crushed particles and slowly heat them to 60-80 degrees Celsius to dissolve them to obtain a solution, filter out the filtrate in the solution, and take the filtrate of the solution as liquid sodium silicate. Step 4: adding a mixed acid solution to the liquid sodium silicate to produce a snowflake-shaped silicic acid precipitate to obtain a mixed solution, wherein the mixed acid is selected from any one of sulfuric acid, hydrochloric acid and nitric acid or a combination of two or more thereof, Step 5: Wash the silicic acid precipitate in the mixed solution twice with pure water and filter it to obtain a white filter cake crude product. Step 6: Dehydrating the white filter cake at a temperature below 60 degrees Celsius to obtain ultra-pure silicon dioxide solid powder; Characterized in that the processing system for preparing sodium silicate using iron tailings sand comprises: A primary screening module for receiving the crushed particles and screening and crushing the crushed particles, a reaction tank for receiving the crushed particles after being processed by the primary screening module, an agitator for stirring the reaction tank, a first quantitative liquid inlet for quantitatively adding pure water into the reaction tank, a heater for heating the reaction tank, a circulation module for discharging the filtrate in the reaction tank to the outside of the reaction tank and retaining the filtrate in the reaction tank, a drain pipe for discharging the liquid sodium silicate in the reaction tank to the outside of the reaction tank, and a discharge valve for controlling the connectivity between the drain pipe and the reaction tank.

2. The processing system according to claim 1, characterized in that: The primary screening module includes a box body with connecting openings at the upper and lower ends, a funnel piece connected to the lower end of the box body at the top and connected to the reaction tank at the bottom, a fixed frame sleeved on the outer wall of the box body, a buffer spring column with a top end connected and fixed to the fixed frame and a bottom end fixed to the top wall of the reaction tank, a filter plate horizontally arranged in the box body, a movable plate horizontally penetrating one of the side walls of the box body and having an air flow channel inside, a rolling assembly fixed to the movable plate for repeatedly rolling the crushed particles on the filter plate, a plurality of ultrasonic generators respectively laid on the outer walls of the box body, a mobile drive unit for driving the movable plate to move back and forth horizontally, and an air intake unit for conveying air flow to the air flow channel in the movable plate.

3. The processing system according to claim 2, characterized in that: A through hole is arranged on the side wall of the box body, and the movable plate is arranged to pass through the through hole horizontally. Balls are evenly embedded on the inner wall of the through hole, and the balls reduce the resistance of the movable plate during horizontal movement.

4. The processing system according to claim 3, characterized in that: The mobile driving unit includes a vertical plate located outside the box and vertically fixed to the bottom wall of the moving plate, a linear hydraulic motor fixed to the side wall of the box through a corresponding mounting seat and capable of horizontal telescopic movement, and a locking member for fixedly connecting the driving end of the linear hydraulic motor to the vertical plate. The linear hydraulic motor drives the moving plate to perform smooth horizontal reciprocating motion in the through-opening through a telescopic action.

5. The processing system according to claim 4, characterized in that: The rolling assembly includes a base plate located in the box body and horizontally laid on the bottom wall of the moving plate, at least two rolling rollers rotatably fixed to the bottom of the base plate through corresponding bearing seats, a limit plate vertically arranged below the base plate, a telescopic driving member with a top end fixedly connected to the base plate and a bottom end fixedly connected to the limit plate, and an insulating sleeve sleeved on the outer wall of the telescopic driving member, and the initial posture of the rolling assembly is the posture of the limit plate abutting against the box side wall provided with the through hole; The main function of the limit plate is to intercept the crushed particles that have not been crushed to the preset particle size, and accumulate them in the rolling area between the rolling roller and the box body to form a high-density crushed particle layer to improve the rolling efficiency of the rolling roller. At the same time, during the operation of the rolling assembly, the limit plate can be controlled to dynamically intercept the crushed particles of different particle sizes through the extension drive of the telescopic drive member to improve the rolling efficiency of the crushed particles by the rolling assembly; The insulating sleeve is a folded tube structure formed by connecting a plurality of annular folded corrugations. The insulating sleeve can freely expand or contract with the movement of the telescopic drive member. At the same time, the insulating sleeve is made of silicone coated fiber cloth and has dustproof and tear-resistant properties.

6. The processing system according to claim 5, characterized in that: The movable plate comprises a plate body, air outlet holes evenly distributed on the bottom wall of the plate body, connecting holes arranged on the side walls of the plate body, a main air flow channel horizontally arranged inside the plate body and connected with the connecting holes, a branch flow channel vertically extending from the main air flow channel to each air outlet hole in sequence, and an air inlet pipe airtightly connected with the connecting holes; The bottom wall of the movable plate is divided into a left side where the vertical plate is fixed and a right side where the rolling assembly is fixed by the limiting plate, and the air outlet is correspondingly arranged in the area on the left side of the movable plate.

7. The processing system according to claim 6, characterized in that: The air intake unit includes a compressed air pump installed on the side box wall of the box body through a corresponding fixed base, a connecting pipeline that connects the air outlet end of the compressed air pump with the air intake pipe so that each air outlet produces an airflow of preset intensity, and a control unit for controlling the negative pressure air pump to output airflow.

8. The processing system according to claim 7, characterized in that: The control unit controls the compressed air pump to output the air flow velocity P(t) according to the operation time of the linear hydraulic motor: Among them, t is the continuous working time of the linear hydraulic pressure, P(t) is the air flow velocity output by the compressed air pump corresponding to the continuous working time t of the linear hydraulic pressure, and the unit of t is seconds, Qmin is the minimum air flow velocity output by the compressed air pump, which is not limited here, the unit of Qmin is square meters per second, A is the range of air flow intensity variation, and A∈[0.5×Qmin,2×Qmin], u is the period adjustment factor, the unit of u is seconds, u∈[1 second,10 seconds], and in order to avoid the air outlet being blocked by dust particles, Qmin is set greater than 0.

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