Diluting and conveying system for beneficiation reagent CMC for large-scale copper-nickel sulfide ore

Abstract

The utility model discloses a system for diluting and conveying a beneficiation reagent CMC (Carboxymethyl Cellulose) for large-scale copper-nickel sulfide ores, belongs to the technical field of dilution of beneficiation reagents, and aims to enable the CMC reagent to be quickly dissolved, diluted and conveyed so as to accelerate beneficiation operation speed and improve operation efficiency. A stirring tank commonly used for beneficiation reagents can be adopted as a bearing body of the reagent dilution two-section stirring system, and liquid medicine diluted by the first-section stirring tank is conveyed to the second-section stirring tank through the conveying pump to be stirred again and then conveyed to a set reagent adding point through the reagent conveying pump to be added after being stirred twice. Through the stirrer for stirring the CMC medicament and the circulating shearing pump, the medicament circularly flows up and down, so that the CMC medicament is prevented from being settled and agglomerated, dynamic circulating stirring is realized, and the stirring strength is enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of ore dressing operations, specifically relates to the technical field of dilution of ore dressing agents, and more specifically relates to a dilution and conveying system of ore dressing agent CMC used for large-scale copper-nickel sulfide ore. Background Art

[0002] CMC mineral processing agent, whose Chinese name is carboxymethyl cellulose, belongs to anionic cellulose ethers. It appears as white or slightly yellow flocculent fiber powder or white powder. It is odorless and non-toxic.

[0003] It is mainly used as a gangue inhibitor in the beneficiation process of copper-nickel sulfide ore, and has a good inhibitory effect on magnesium-containing gangue. It can inhibit the magnesium-containing gangue of copper-nickel sulfide ore with a magnesium content of about 30% in the original ore, and control the magnesium content of the concentrate product below 6%, and has little impact on the nickel-copper recovery rate.

[0004] The dilution and transportation of general mineral processing reagents such as xanthate and copper sulfate are directly carried out in a stirring tank. After the reagents are poured into the stirring tank and stirred to dissolve, they are transported to the place where they are needed by a reagent pump for addition.

[0005] The mineral processing agent CMC is difficult to dissolve and generally takes 10-20 hours to dissolve; it has high dilution requirements and needs constant stirring and dissolution, and the mineral processing plant agent is prone to agglomeration, caking, sedimentation and settling; and the amount of mineral processing agent CMC is large, generally 500-1000g / t; it has high viscosity, generally a 1% solution viscosity reaches 50-70 centipoise. These characteristics make it difficult to add the agent in the mineral processing industry and its application is limited. Utility Model Content

[0006] In view of the problem that the existing mineral processing agent CMC is difficult to dissolve and transport, the utility model provides a dilution and transportation system for the mineral processing agent CMC used in large-scale copper-nickel sulfide ores, which aims to make the CMC agent quickly dissolve, dilute and transport, so as to speed up the mineral processing operation and improve the operation efficiency.

[0007] To this end, the utility model adopts the following technical solutions:

[0008] A dilution and conveying system for CMC, a mineral processing agent used in large-scale copper-nickel sulfide ore, comprising a primary stirring tank and a secondary stirring tank. The material stirred in the primary stirring tank is conveyed to the secondary stirring tank for stirring. The secondary stirring tank is connected to a distribution box, and the distribution box is connected to multiple flotation machines. The material stirred in the secondary stirring tank is conveyed to the distribution box, and then distributed to each flotation machine for use through the distribution box.

[0009] An agitator is installed in the mixing tank, and a number of flow stabilizers are installed on the inner wall of the mixing tank. The flow stabilizers are of a grid plate structure. A circulating shearing device is also connected to the mixing tank. The circulating shearing device is used to transport the materials at the bottom of the mixing tank to the upper part of the mixing tank through a pipeline and a circulating shearing pump to realize the shear circulation of the materials at the upper part and the lower part of the mixing tank. A horizontal sieve plate is also fixed at the lower part of the mixing tank. The sieve plate is fixed on the inner wall of the mixing tank around the sieve plate. The sieve plate is used to intercept block materials with a volume larger than the aperture of the sieve plate.

[0010] The distribution box is also connected to a secondary dilution water delivery pipe, through which water is input to dilute the material; a regulating valve and a flow meter are provided on the pipeline connecting the distribution box to the flotation machine, and the regulating valve and the flow meter are interlocked.

[0011] Furthermore, a horizontal screen is fixed at the feed inlet on the top of the first stirring tank, and the CMC solid medicine is poured onto the screen, and the feeding speed is controlled by the screen.

[0012] Furthermore, the holes on the sieve plate are circular holes, and the diameter of the circular holes is 20 mm.

[0013] Furthermore, the pore size of the sieve is 10 mm×10 mm.

[0014] Furthermore, the flow stabilizing plate is made of steel grating, and the flow stabilizing plate is vertically welded to the inner wall of the stirring tank.

[0015] The design principle of the utility model is as follows:

[0016] 1. Establish a two-stage stirring system for the CMC reagent dilution system. The utility model adopts a two-stage stirring system, and can use a stirring tank commonly used in mineral processing reagents as the carrier of the two-stage stirring system for reagent dilution. The liquid diluted in the first stirring tank is transported to the second stirring tank by a delivery pump for re-stirring. After two stirrings, it is transported to the designated dosing point by a reagent delivery pump for dosing. Through the agitator and circulating shear pump for CMC reagent stirring, the reagent is circulated up and down to prevent the CMC reagent from settling and agglomerating, realize dynamic circulation stirring, and enhance the stirring intensity.

[0017] 2. The utility model installs a stirrer inside the two-stage stirring tank of the CMC agent, so that the liquid medicine rotates and flows fully inside the stirring tank, and its rotation speed can reach more than 150r / min.

[0018] 3. The utility model adds a flow stabilizing device to the CMC agent stirring tank. Flow stabilizing plates are installed around the cylinder inside the stirring tank, and the rib plate structure is used for reinforcement, so that the flow stabilizing plates are fixed to the inner wall of the stirring tank, thereby stabilizing the flow direction of the agent. The liquid medicine impacts and breaks large particles through the centrifugal force of the agitator, thereby increasing the CMC dissolution rate. The flow stabilizing plate is made of steel grating to strengthen the collision and shearing of the block CMC agent with the flow stabilizing plate, and enhance the agent breaking effect.

[0019] 4. The utility model adds a circulating shear device and a circulating shear pump to the CMC agent stirring tank to accelerate the circulation and flow speed inside the agent, so that the CMC liquid in the stirring tank is always in a dynamic flow state, thereby achieving the purpose of strengthening the stirring intensity, and using the pump impeller to cut large pieces of material to reduce the volume of colloidal particles, and then cooperate with the sieve plate to separate large pieces, thereby increasing the dissolution rate of CMC.

[0020] 5. The utility model adds a carbon steel sieve plate (circular sieve hole size R=20mm) at the bottom of the CMC reagent stirring tank to screen out the blockage caused by large pieces of reagent entering the pump and conveying pipeline, allowing the large pieces of material to continue to dissolve until they can reach the size of the sieve plate. The dissolved liquid medicine and small pieces of material pass through the sieve plate into the next stage of stirring and conveying system.

[0021] 6. The utility model adds a screen (10*10mm) at the inlet of a pharmaceutical stirring tank to disperse and add CMC materials, blocking the entire material from entering the stirring tank and causing large pieces of material to agglomerate.

[0022] 7. The utility model installs a large-caliber screw pump or impeller pump below the secondary mixing tank, and installs a matching large-caliber pipeline to transport the CMC agent to the grinding and flotation area, installs a liquid distributor in the flotation area, installs a branch pipeline on the distributor, and the branch pipeline transports the liquid to each adding point. A valve and a flow meter are installed between the branch pipeline and the distribution box, and the dosage of each dosing point is controlled by controlling the opening of the valve. A secondary dilution water pipe is installed in the distribution box to dilute the agent twice before flowing into each dosing point, reducing the probability of the agent blocking the pipeline.

[0023] The beneficial effects of the utility model are:

[0024] Through the implementation and application of the utility model, the problem of adding CMC reagent to large-scale copper-nickel sulfide ores is solved, the reagent dissolution rate is greatly improved, the reagent stirring and conveying system is simple, and a large number of stirring tanks and conveying pumps are not required, which saves site area and investment costs. The most important thing is that the reagent addition is carried out normally, and the problem of clogging the pipeline and burning the pump during production of the mineral processing reagent CMC is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the utility model;

[0026] In the figure: 1-primary stirring tank, 2-secondary stirring tank, 3-circulating shear pump, 4-transfer pump, 5-distribution box, 6-regulating valve, 7-flow meter, 8-flotation machine, 9-screen, 10-screen plate. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0028] A dilution and conveying system for a mineral processing agent CMC used in a large-scale copper-nickel sulfide ore, the dilution and conveying system comprising a primary stirring tank 1 and a secondary stirring tank 2, the material stirred in the primary stirring tank 1 is conveyed to the secondary stirring tank 2 for stirring, the secondary stirring tank 2 is connected to a distribution box 5, and the distribution box 5 is connected to a plurality of flotation machines 8; the material stirred in the secondary stirring tank 2 is conveyed to the distribution box 5, and then distributed to each flotation machine 8 for use through the distribution box 5.

[0029] A stirrer is installed in the mixing tank, and a number of flow stabilizers are installed on the inner wall of the mixing tank. The flow stabilizers are made of a grating structure and made of steel grating. The flow stabilizers are vertically welded to the inner wall of the mixing tank. The mixing tank is also connected to a circulating shearing device, which is used to transport the materials at the bottom of the mixing tank to the upper part of the mixing tank through a pipeline and a circulating shearing pump 3, so as to realize the shear circulation of the materials at the upper part and the lower part of the mixing tank; a horizontal sieve plate 10 is also fixed at the lower part of the mixing tank, and the sieve plate 10 is fixed on the inner wall of the mixing tank around, and the sieve plate 10 is used to intercept block materials whose volume is larger than the aperture of the sieve plate 10. The holes on the sieve plate 10 are circular holes, and the aperture of the circular holes is 20mm.

[0030] The distribution box 5 is also connected to a secondary dilution water delivery pipe, through which water is input to dilute the material; a regulating valve and a flow meter are provided on the pipeline connecting the distribution box 5 to the flotation machine 8, and the regulating valve and the flow meter are interlocked.

[0031] A horizontal screen 9 is fixed at the top feed port of the first stirring tank, and the aperture of the screen 9 is 10 mm×10 mm. The CMC solid medicine is poured on the screen 9, and the feeding speed is controlled by the screen 9.

[0032] In a large-scale copper-nickel sulfide mine, the ore processing capacity is 17,000t / d. The main magnesium-reducing agent is CMC. Due to the large demand for the agent, 12 tons of agent are needed every day. According to the dilution concentration of 1%, 1,200 cubic meters of liquid need to be diluted and transported every day.

[0033] The on-site CMC agent dilution process is that the diluted agent is pumped into the CMC secondary stirring tank 2 (230 cubic meters) after being diluted by three primary stirring tanks 1 (each with 80 cubic meters). The lower part of the secondary stirring tank 2 is equipped with an agent adding pump to directly pump into the on-site flotation machine 8, and the stirring tank speed is 150r / min. The original design of the agent system has insufficient dissolution time and dissolution capacity, which can only reach 180~200g / t; after applying the utility model patent, the agent dissolution time is accelerated, and it only takes 3 hours to dissolve. The agent dilution and transportation capacity reaches 800g / t, which meets the on-site needs.

Claims

1. A dilution and delivery system for CMC, a ore dressing agent used in large-scale copper-nickel sulfide ore, characterized in that: The dilution and conveying system includes a primary stirring tank and a secondary stirring tank. The material stirred in the primary stirring tank is conveyed to the secondary stirring tank for stirring. The secondary stirring tank is connected to a distribution box, and the distribution box is connected to multiple flotation machines. The material stirred in the secondary stirring tank is conveyed to the distribution box, and then distributed to each flotation machine for use through the distribution box. An agitator is installed in the mixing tank, and a number of flow stabilizers are installed on the inner wall of the mixing tank. The flow stabilizers are of a grid plate structure. A circulating shearing device is also connected to the mixing tank. The circulating shearing device is used to transport the materials at the bottom of the mixing tank to the upper part of the mixing tank through a pipeline and a circulating shearing pump to realize the shear circulation of the materials at the upper part and the lower part of the mixing tank. A horizontal sieve plate is also fixed at the lower part of the mixing tank. The sieve plate is fixed on the inner wall of the mixing tank around the sieve plate. The sieve plate is used to intercept block materials with a volume larger than the aperture of the sieve plate. The distribution box is also connected to a secondary dilution water delivery pipe, through which water is input to dilute the material; a regulating valve and a flow meter are provided on the pipeline connecting the distribution box to the flotation machine, and the regulating valve and the flow meter are interlocked.

2. The dilution and delivery system of CMC, a ore dressing agent used in large-scale copper-nickel sulfide ore according to claim 1, is characterized in that: A horizontal screen is fixed at the top feed port of the first stirring tank, and the CMC solid medicine is poured onto the screen, and the feeding speed is controlled by the screen.

3. The dilution and delivery system of CMC for ore dressing used in large-scale copper-nickel sulfide ore according to claim 1, characterized in that: The holes on the sieve plate are circular holes, and the diameter of the circular holes is 20 mm.

4. The dilution and delivery system of CMC for ore dressing agent used in large-scale copper-nickel sulfide ore according to claim 2 is characterized in that: The aperture of the sieve is 10 mm×10 mm.

5. The dilution and delivery system of CMC, a ore dressing agent used in large-scale copper-nickel sulfide ore according to claim 1, is characterized in that: The flow stabilizing plate is made of steel grating, and the flow stabilizing plate is vertically welded to the inner wall of the stirring tank.

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