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Method for separating and recycling zinc from secondary zinc resource by using distilling-condensing device

A technology for separation and recovery of secondary resources, applied in the field of metallurgy for the separation and recovery of zinc from secondary zinc resources, and the extraction of metallic zinc, which can solve the problems of various physical occurrence states and complex chemical composition of secondary zinc materials.

Inactive Publication Date: 2013-06-12
KUNMING UNIV OF SCI & TECH TECH IND SALES MANAGEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex chemical composition and various physical occurrence states of these secondary zinc materials, there is currently no general method and equipment for processing them.

Method used

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  • Method for separating and recycling zinc from secondary zinc resource by using distilling-condensing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: Take 1000Kg hot-dip galvanizing slag raw material, containing 93.5% zinc, 3.5% iron, 1.3% aluminum, 0.42% lead, 0.037% silicon, 0.012% magnesium, 0.025% tin, and 0.01% copper. Use a crane to open the sealing cover of the evaporation tank, add hot zinc slag raw materials into the evaporation tank, cover the sealing cover, and seal it. Turn on the power switch, heat up, and when heating for 120 minutes, the temperature in the distillation tank reaches 900°C, and the temperature is kept at a constant temperature through the automatic adjustment of the electrical control cabinet, and the constant temperature time is 10 hours. Then turn off the power switch to reduce the temperature in the evaporation tank to about 450°C. Open the working side door of the lower part of the condenser, release the zinc liquid and cast ingots to obtain 820.4Kg of zinc ingots. After the molten zinc ingot casting is completed, continue to automatically cool the furnace body to 200-3...

Embodiment 2

[0015] Example 2: Take 1000Kg hard zinc raw material, containing 84.3% zinc, 12.6% lead, 0.11% indium, and 1.62% iron. Use a crane to open the sealing cover of the evaporation tank, add the hard zinc raw material into the evaporation tank, cover the sealing cover, and seal it. Turn on the power switch and heat up. After heating for 150 minutes, the temperature in the evaporation tank reaches 1000°C. The temperature is automatically adjusted by the electrical control cabinet to keep the temperature at a constant temperature. The constant temperature time is 8 hours. Then turn off the power switch to reduce the temperature in the evaporation tank to about 470°C. Open the working side door of the lower part of the condenser, release the zinc liquid and cast ingots to obtain 775.1Kg of zinc ingots. After the zinc liquid is put, continue to make the furnace body automatically cool down to 200-300°C, open the round arched sealing cover of the evaporation tank, and take out 223.5K...

Embodiment 3

[0016] Example 3: Take 1000Kg zinc-tin alloy, containing 76.3% zinc, 21.5% tin, 1.1% lead, 0.2% iron, 0.3% copper, and 0.1% calcium. Use a crane to open the sealing cover of the evaporation tank, add the zinc-tin alloy raw material into the evaporation tank, cover the sealing cover, and seal it. Turn on the power switch, heat up, and when heating for 120 minutes, the temperature in the evaporation tank reaches 950°C, and the temperature is kept constant through the automatic adjustment of the electrical control cabinet, and the constant temperature time is 8 hours. Then turn off the power switch to reduce the temperature in the evaporation tank to about 500°C. Open the working side door of the lower part of the condenser, release the zinc liquid and cast ingots to obtain 672.5Kg of zinc ingots. After the zinc liquid is put out, continue to make the furnace body automatically cool down to 200-300°C, open the round arched sealing cover of the evaporation tank, and take out 32...

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Abstract

The invention discloses a method for separating and recycling zinc from secondary zinc resource by using a distilling-condensing device, belongs to the field of thermometallurgy, in particular relates to an extraction metallurgy technique of metal zinc, and relates to a method and a device for separating and recycling zinc from the secondary zinc resource. The method comprises the following steps of: adding a secondary zinc material in which the zinc content is greater than 30wt% into an evaporation tank, sealing the top cover, powering on a sensing heating coil to increase the temperature, increasing the temperature inside the evaporation tank to be at 900-1150 DEG C, generating a zinc liquid and evaporating, preserving the temperature of the zinc steam and introducing into a condenser, condensing and coacervating at the inner of a condensing chamber so as to form liquid zinc, opening the outlet at the lower part of the condenser to discharge the liquid zinc from the outlet, and ingoting so as to obtain zinc ingots. The method is simple in equipment and convenient in operation and has the characteristics of high recovery rate, wide material application range, good economic benefit, rapid investment return and the like.

Description

technical field [0001] The invention belongs to the field of pyrometallurgy, in particular to the extraction metallurgy technology of metal zinc, and relates to a method and a device for separating and recovering zinc from zinc secondary resources. Background technique [0002] In the process of smelting and using zinc metal, zinc wastes and wastes are often produced. These wastes and wastes are mainly composed of zinc and contain valuable metals such as iron, lead, aluminum, indium, silver, tin, antimony or germanium. , called zinc secondary resources. For example: (1) When hot-dip galvanizing is carried out in steel companies, hot-dip galvanizing slag containing zinc, iron, aluminum and other elements will be produced. The main component of this slag is zinc, accounting for 90% to 95% of the total, followed by iron , accounting for 3% to 6%, and a small amount of impurities such as lead, copper, and aluminum. (2) During the distillation process of crude zinc in pyrometa...

Claims

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Application Information

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IPC IPC(8): C22B19/16C22B19/18C22B7/00
CPCY02P10/20
Inventor 魏昶李兴彬李旻廷邓志敢李存兄樊刚
Owner KUNMING UNIV OF SCI & TECH TECH IND SALES MANAGEMENT
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