Wet process dust collecting and leaching electrodeposition integrated technology for zinc-contained solid waste disposal

A wet dust collection and leaching technology, which is applied in the direction of photography technology, photography auxiliary technology, and improvement of process efficiency, can solve the problems of frequent replacement cycles, environmental pollution, and high operating costs, so as to save investment in infrastructure equipment and land occupation, The effect of reducing the process and saving capital investment

Active Publication Date: 2015-10-21
JIANGXI JINBOLAI RESOURCES RECYCLING NEW TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 3. The efficiency of removing fluorine and chlorine in the alkali washing process is low, and the amount of fluorine and chlorine-containing wastewater produced is large, which is difficult to recycle, causing a great waste of water resources; it is easy to cause secondary pollution
[0006] 4. High operating cost and large investment in equipment
[0007] 5. Construction machinery and production equipment are easily corroded and damaged by acid-containing gas, and the repair and maintenance costs are high
[0008] 6. The dust collection bag is easy to block, the replacement cycle is frequent, and the cost is high; the fine dust easily floats in the air through the bag, causing harm to the health of workers and polluting the environment
[0009] 7. Dust collection needs to be packaged and transported to the zinc leaching system. Dust drifts during the transportation process and pollutes the environment
[0010] The above process can no longer meet the national requirements for environmental protection, energy, sanitation, etc.

Method used

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  • Wet process dust collecting and leaching electrodeposition integrated technology for zinc-contained solid waste disposal
  • Wet process dust collecting and leaching electrodeposition integrated technology for zinc-contained solid waste disposal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 4

[0066] Raw material A, Zn45.2%, Fe4.2%, Pb5.8%, Cl8.5%, F0.6%; add 50gA to 1000ml solution containing ammonium chloride 300g / L, temperature is 50℃, reaction 1 Hours, Zn21.5g / L, Pb2.84g / L, zinc leaching rate 95.13%, lead leaching rate 97.93%; Purification: Zinc powder is added according to 0.4 times of the lead content in the leaching solution, and the purification time is 1.5 hours. The temperature is 40°C, and the lead content (dry basis) of the filter press purification residue is 85%. After purification, 2g / L zinc powder is added to the deep purification, and the impurity content (mg / L) of the filtrate is: Pb0.1, Cu0.05, Cd0 .05 ; This solution was subjected to electrolysis.

[0067] Electrolysis uses graphite as the anode, aluminum plate as the cathode, the distance between the same electrodes is 70mm, and the current density is 400A / m 2 , the electrolysis temperature is 50°C, the cell voltage is 2.72 volts, the pH value of the electrolysis is controlled by adding 25% amm...

Embodiment 5

[0070] Raw material B, composition (%): Zn48, Cu4.5, Pb2.6, 100g of B was added to 1000ml of ammonium chloride 250g / L solution, the leaching temperature was 65°C, and the leaching time was 1 hour. The composition of the filtrate after leaching (g / l): Zn45.2, Pb2.45, Cu4.3, the leaching rate of zinc is 94.17%, the leaching rate of lead is 94.23%, and the leaching rate of copper is 95.56%; add copper to the leaching solution content of 1 times zinc powder, the purification time is 0.5 hours, the purification temperature is 50 ℃, the sponge copper content (dry basis) is 75%, and then 0.4 times the lead content of zinc powder is added to obtain the lead content of the purified slag (dry basis) It is 80%, and the filtrate is electrolyzed after deep purification.

[0071] Electrolysis uses graphite as anode, aluminum plate as cathode, current density 500A / m 2 , the electrolysis temperature is 65°C, the cell voltage is 2.8 volts, 25% ammonia water is added to control the pH at 4.0-...

Embodiment 6

[0074] Raw material C, composition (%): Zn38, Pb12.8, Cl 17.2; add 100g of C into 1000ml of ammonium chloride 250g / L solution, the reaction temperature is 50°C, and the leaching time is 1 hour. The composition of the filtrate after leaching (g / l): Zn36.5, Pb12.3, the leaching rate of zinc is 96.05%, and the leaching rate of lead is 96.09%; add zinc powder 0.4 times the lead content to the leaching solution, and the purification time is 1.5 hour, the purification temperature is 50°C, and the lead (dry basis) content of the purified slag is 90%, and then 2g / L zinc powder is added for deep purification and then electrolyzed.

[0075] Electrolysis uses graphite as anode, aluminum plate as cathode, current density 450A / m 2 , the electrolysis temperature is 70°C, the cell voltage is 2.7 volts, 25% ammonia water is added to control the pH at 4.0-7, the waste liquid contains 12.5g / L of zinc, the current efficiency is 96%, and the DC power consumption of zinc precipitation is 2680Kwh / ...

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Abstract

The invention relates to a wet process dust collecting and leaching electrodeposition integrated technology for zinc-contained solid waste disposal, and belongs to technological methods for treating low-grade zinc materials such as volatile oxidized ore and leaching residues. Main technological processes comprise high-temperature oxide reduction, spraying dust collecting, pneumatic emulsification with a pneumatic emulsification device and electric mist removing. After spraying and dust collecting are carried out, slurry liquid is drained to a leaching reaction kettle, and filter-press filter liquor is conveyed to a zinc purification working procedure; and filter slag is returned for high-temperature oxide reduction. The aim that the low-grade zinc materials are directly converted into zinc leaching liquid is achieved, and the leaching liquid is directly conveyed to a zinc purification system; and then press filter slag is returned for high-temperature oxide reduction. Valuable metal indium tin bismuth and the like are gathered, and the discharged smoke reaches the national emission standard.

Description

technical field [0001] The invention relates to an integrated process of wet dust collection and leaching and electrodeposition for zinc-containing solid waste disposal, which belongs to a process for processing low-grade zinc materials such as volatile oxide ore and leaching slag. Background technique [0002] Domestically, the commonly used technological process for processing low-grade zinc materials such as volatile oxide ore and leaching slag is: high temperature reduction oxidation-surface cooling-bag dust collection-alkali elution of fluorine and chlorine-sulfuric acid leaching-electrodeposition. This process has the following disadvantages: [0003] 1. The operation is discontinuous and the production efficiency is low. [0004] 2. The operating environment is harsh and the labor intensity is high. Working in a high-dust environment for a long time, the operating process can easily cause occupational diseases of the respiratory system. [0005] 3. The e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/16C22B7/00C22B15/00C22B13/00
CPCY02P10/20
Inventor 邓海云
Owner JIANGXI JINBOLAI RESOURCES RECYCLING NEW TECH CO LTD
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