Resourceful treatment method for soot from copper melting furnace
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A treatment method and technology for a copper smelting furnace are applied in the direction of ammonium sulfite, process efficiency improvement, etc., which can solve the problems of low recovery rate of valuable metals, and the purity of recovered products does not reach the expected effect, and achieve added value of products. The effect of large, small environmental impact and high comprehensive recovery rate
Active Publication Date: 2019-05-21
王柯娜
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But all have the following disadvantages: pyromelting smelting will inevitably produce secondary pollution, the purity of recovered products has not reached the expected effect, and the recovery rate of valuable metals is not high
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Embodiment 1
[0038] A method for recycling copper smelting furnace soot, comprising the following steps:
[0039] (1) High-temperature alkali cooking, slurry the soot with water, add caustic soda, then put it into a sealed reaction kettle, raise the temperature to 145°C, react at this temperature for 75min, and then filter to obtain the filtrate and filter residue, add water to the soot After pulping, the solid content of the pulping material is 27%, the quality of the caustic soda added is 0.33 times of the soot quality, and the reaction process maintains the pressure in the reactor to be 1.4 atmospheres;
[0040] In this step, the amphoteric metals and oxides can be leached efficiently and quickly through the alkali boiling process under high temperature and high pressure. By adjusting the solid content of the slurry, the amount of alkali can be reduced, and the concentration of alkali can be increased at the same time to improve efficiency. Here Compared with leaching at a temperature l...
Embodiment 2
[0063] A method for recycling copper smelting furnace soot, comprising the following steps:
[0064] (1) high-temperature alkali cooking, adding water to the soot, adding caustic soda, then putting it into a sealed reaction kettle, heating up to a temperature of 145°C, reacting at this temperature for 90 minutes, and then filtering to obtain a filtrate and a filter residue;
[0065] (2) the filtrate is passed into hydrogen sulfide, the pH of the adjusted solution is 11, then stirred for 25min, then filtered to obtain the first filtrate and the first filter residue, the first filtrate is continued to pass through the hydrogen sulfide reaction until the pH of the solution is 7.8, Stop reaction then, filter, obtain the second filtrate and the second filter residue, add sulfuric acid to dissolve the second filter residue, then concentrate and crystallize to obtain industrial pure zinc sulfate;
[0066] (3) Add the filter residue obtained in step (1) to hydrochloric acid solution, ...
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Abstract
The invention discloses a resourceful treatment method for soot from a copper melting furnace. The method comprises the following steps: separating lead-copper and tin-arsenic-zinc-antimony in soot byhigh-temperature alkaline cooking; introducing hydrogen sulfide into the obtained filtrate to precipitate tin-arsenic-antimony, then continuously introducing hydrogen sulfide to participate zinc, dissolving zinc participates by adding sulfuric acid, and performing concentration and crystallization to obtain industrial pure zinc sulfate; adding lead-copper to a hydrochloric acid solution, then adding sodium chlorate, and cooling the obtained solution to obtain lead chloride filtering residues and copper chloride filtrate; adding tin-arsenic-antimony filtering residues to hydrochloric acid fordissolution so as to obtain an antimony-containing solution, extracting the antimony-containing solution by adding an extraction agent, then performing reverse extraction with p ammonia water, performing concentration and crystallization on the obtained stripping solution to obtain antimony chloride, adding the obtained fifth filtering residues to a sodium sulfide solution for reaction, and then performing filtering so as to obtain tin-containing filtrate arsenic sulfide residues. By adopting the method provided by the invention, the separation and recovery of valuable metals in the soot are achieved, the recovery rate is high and the product finally obtained has high purity; and meanwhile, most of by-products thereof are recovered, the cost is low and the process is short.
Description
technical field [0001] The invention relates to a method for recycling copper smelting furnace soot, and belongs to the technical field of waste treatment. Background technique [0002] When dealing with miscellaneous copper, the current mainstream process is to melt the miscellaneous copper in a high-temperature melting furnace, then smelt it into a copper anode plate, and then electrolytically refine it to obtain copper cathode. However, in the copper pyrometallurgical industry, the resource consumption is large, the comprehensive utilization rate of secondary resources is low, and a considerable part of the available resources become pollutants. Copper converter soot is a secondary resource that has a large amount of emissions in the copper metallurgical industry and has not been fully utilized so far. It has important theoretical and practical significance to recover valuable elements such as copper, zinc and lead from copper converter soot for comprehensive resource ut...
Claims
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