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A method for separating zinc-cadmium-lead alloy material from copper-cadmium slag and nickel-cobalt slag produced in zinc smelting process

A technology for copper-cadmium slag and nickel-cobalt slag, applied in the field of separating zinc-cadmium-lead alloy materials, can solve the problems of large amount of pollutants, low metal recovery rate, lengthy process, etc., and achieve fast enrichment speed and comprehensive utilization of resources High and simple separation process

Active Publication Date: 2019-12-13
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Based on the problems existing in the prior art, the present invention proposes a method for separating zinc-cadmium-lead alloy materials from copper-cadmium slag and nickel-cobalt slag produced in the zinc smelting process. tedious, low metal recovery, high levels of pollutant generation, and efficient separation of most metals from copper cadmium and nickel cobalt slags

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment provides a method for separating zinc-cadmium-lead alloy materials from copper-cadmium slag and nickel-cobalt slag produced in the zinc smelting process. The dried copper cadmium slag is mixed according to copper cadmium slag: coal powder: quicklime (mass ratio) = 100: 0.5: 0.5. After the ingredients are mixed evenly, use a briquetting machine to press the ball under a pressure of 24MPa to make Put the mixture pellets in a graphite crucible and put them in a vacuum distillation furnace, turn on the vacuum pump, make the pressure in the vacuum furnace below 200Pa, start heating, heat it to 1000°C for 5 hours, and cool down after the heat preservation is over After reaching normal temperature, break the vacuum, and collect the distillate obtained by distillation, which is the separated lead-zinc-cadmium alloy material.

[0027] Weigh the distillation residue, analyze the content of lead, zinc and cadmium, and calculate the volatilization rate of lead, zin...

Embodiment 2

[0029] This embodiment provides a method for separating zinc-cadmium-lead alloy materials from copper-cadmium slag and nickel-cobalt slag produced in the zinc smelting process. The dried copper cadmium slag is mixed according to copper cadmium slag: coal powder: quicklime powder (mass ratio) = 100: 50: 50. After the ingredients are mixed evenly, use a ball pressing machine to press the ball under a pressure of 24MPa to make a ball of φ10mm Put the mixture pellets in a graphite crucible and put them in a vacuum distillation furnace, turn on the vacuum pump to make the pressure in the vacuum furnace below 200Pa, start heating, heat it to 1000°C for 5 hours, and cool down to room temperature after the heat preservation is over. After breaking the vacuum, collecting the distillate obtained by distillation is the separated lead-zinc-cadmium alloy material.

[0030] Weigh the distillation residue, analyze the content of lead, zinc and cadmium, and calculate the volatilization rate o...

Embodiment 3

[0032] This embodiment provides a method for separating zinc-cadmium-lead alloy materials from copper-cadmium slag and nickel-cobalt slag produced in the zinc smelting process. The dried copper cadmium slag is mixed according to copper cadmium slag: coal powder: quicklime powder (mass ratio) = 100: 0.5: 0.5, and after the ingredients are mixed evenly, use a ball pressing machine to press the ball at a pressure of 24MPa to make a ball of φ10mm Put the mixture pellets in a graphite crucible and put them in a vacuum distillation furnace, turn on the vacuum pump to make the pressure in the vacuum furnace below 200Pa, start heating, heat it to 900°C for 0.5 hours, and cool it down to room temperature after the heat preservation is over After breaking the vacuum, collecting the distillate obtained by distillation is the separated lead-zinc-cadmium alloy material.

[0033] Weigh the distillation residue, analyze the content of lead, zinc and cadmium, and calculate the volatilization ...

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Abstract

The invention discloses a method for separating zinc-cadmium-lead alloy materials from copper-cadmium slag and nickel-cobalt slag generated in a zinc smelting process. The method comprises the following steps that a mixture of the copper-cadmium slag, the nickel-cobalt slag or the copper-cadmium slag and the nickel-cobalt slag are prepared into the coal powder and alkaline-earth metal oxide, the mixture is subjected to vacuum distillation, the distillation pressure is less than 200 Pa, heating is started, the distillation temperature ranges from 900 DEG C to 1200 DEG C, then heat preservationis carried out for 0.5h-10h, the distillate obtained by collecting and distilling contains lead, zinc, and cadmium alloy materials, and the distillation residues are copper, nickel, cobalt and the like. According to the method, the lead, the zinc, the cadmium, the copper and the nickel in the copper-cadmium slag and the nickel-cobalt slag are utilized, the lead in the copper-cadmium slag and the nickel-cobalt slag is realized by the vapor pressure difference of the cobalt at different temperatures, zinc, cadmium, copper, nickel and cobalt, a large amount of lead, zinc and cadmium in the distillation process can be separated, and the residual substances in the distillation residues are copper, nickel and cobalt, so that the preliminary separation of metal in the copper-cadmium slag and thenickel-cobalt slag is realized. The method is convenient to operate, high in energy utilization rate and heating efficiency, safe, sanitary and pollution-free.

Description

【Technical field】 [0001] The invention belongs to the field of zinc metallurgy, and relates to the preliminary separation of copper-cadmium slag and nickel-cobalt slag produced in the zinc smelting process, in particular to a method for separating zinc-cadmium-lead alloy materials from the copper-cadmium slag and nickel-cobalt slag produced in the zinc smelting process . 【Background technique】 [0002] Zinc hydrometallurgy is the main method of zinc extraction metallurgy. The zinc hydrometallurgy process mainly includes: roasting of zinc concentrate, leaching of calcine with sulfuric acid solution, purification of zinc sulfate solution, and electrowinning of zinc sulfate solution after purification to produce metallic zinc. The zinc sulfate leaching solution usually contains copper, cadmium, nickel, cobalt and other impurity metals, and the removal method of these metals is mainly the zinc powder reduction method. Due to the different removal conditions of copper, cadmium an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B5/10
CPCC22B5/10C22B7/001C22B7/04Y02P10/20
Inventor 马红周王耀宁
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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