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Method for smelting metal zinc powder from zinc calcine by using electric furnace

A technology of electric furnace smelting and zinc calcination, which is applied in the field of non-ferrous metal smelting, can solve the problems of low oxygen content and low production cost of metal zinc powder, and achieve the effects of low production cost, good product quality and low energy consumption

Inactive Publication Date: 2012-06-06
云南天浩稀贵金属股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to address the limitations of the existing electric furnace zinc smelting powder, which cannot produce high-quality metal zinc powder (used in coatings, precision instrument processing, pharmaceutical preparations, etc.) and the production of high-quality zinc powder must use high-quality zinc ingots as raw materials , the method integrates electric furnace smelting, zinc refining, and metal zinc powder production into three independent production processes. Zinc calcined sand can be directly used as raw material. The metal zinc powder produced has low oxygen content and strong activity, and has direct metal recovery rate. High, wide source of raw materials, low energy consumption, good product quality, low production cost

Method used

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  • Method for smelting metal zinc powder from zinc calcine by using electric furnace
  • Method for smelting metal zinc powder from zinc calcine by using electric furnace

Examples

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Effect test

Embodiment 1

[0010] Example 1: In a 1250KVA electric furnace, 14t of zinc calcined sand is continuously cast, the calcined sand contains 50% zinc, and the continuous operation is 24 hours. The temperature of the evaporating furnace is 1200°C, the cadmium tower is rectified, and the rectifying temperature is 1000-1300°C. After cooling, the zinc liquid is put into the evaporating furnace at 580-650°C and evaporated at 1200-1300°C to obtain the product metal zinc powder 5.54t, B No. 1.4t of zinc, 75kg of hard zinc, 9.5kg of crude lead, 18.8kg of high-cadmium zinc, 99.30% zinc in metal zinc powder, 0.5% ZnO content, 79.14% zinc direct recovery rate, and 95% comprehensive recovery rate.

Embodiment 2

[0011] Example 2: Continuously put 28t of zinc sand into a 1250KVA electric furnace, the sand contains 55% zinc, and feeds continuously for 48 hours. The temperature of the electric furnace is 1250-1300°C, the slag of the electric furnace contains 3.2% zinc, and the rectification temperature of the lead tower is 1200-1300°C , the rectification temperature of cadmium tower is 1150~1250℃, the temperature of zinc evaporation furnace is 1200℃, and the product is 12.10t, B zinc 2.98t, hard zinc 171kg, crude lead 22kg, high cadmium zinc 33.08kg, metal zinc powder contains zinc 99.38% , ZnO content 0.5%, zinc direct recovery rate 80%, comprehensive recovery rate 95.4%.

Embodiment 3

[0012] Example 3: Continuously put 28t of zinc sand into a 1250KVA electric furnace, the sand contains 52% zinc, and feeds continuously for 48 hours, the temperature of the electric furnace is 1300-1350°C, the slag of the electric furnace contains 2.9% zinc, and the rectification temperature of the lead tower is 1200-1300°C , the rectification temperature of cadmium tower is 1150~1250℃, the temperature of zinc evaporation furnace is 1200℃, and 11.78t of products are obtained, 2.35t of B zinc, 170kg of hard zinc, 22kg of crude lead, 33.28kg of high cadmium zinc, and the direct gold recovery rate is 80.38%. The comprehensive recovery rate was 96.42%.

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Abstract

The invention relates to a non-ferrous metal smelting process, in particular to a zinc powder smelting process belonging to the technical field of non-ferrous metal smelting. The process comprises the following steps of: putting zinc calcine containing 50-55wt% of zinc into an electric furnace; cooling zinc steam into zinc liquid at the furnace temperature of 1,300+ / -100 DEG C and the negative pressure of 7,000pa-8,000pa; making the zinc liquid enter into a lead tower for rectifying at the rectification temperature of 1,100-1,300 DEG C under the condition of keeping the temperature at 580-650DEG C; then cooling into the zinc liquid again and making the zinc liquid enter into a rectification tower for rectifying at the temperature of 1,000-1,300 DEG C; cooling the zinc liquid and then putting the zinc liquid into a vaporizing furnace at the temperature of 580-650 DEG C; and vaporizing at the temperature of 1,200-1,300 DEG C, condensing the zinc steam and then grading and vacuumizing. The invention integrates the three independent production processes of electric furnace smelting, zinc refining and metal zinc powder production and has the characteristics of high metal direct recovery rate, wide raw material resource, low energy consumption, high product quality and low production cost.

Description

technical field [0001] The invention relates to a production technology for smelting nonferrous metals, in particular to a production technology for smelting metal zinc powder, and belongs to the technical field of smelting nonferrous metals. Background technique [0002] Traditional electric furnace smelting zinc powder produces zinc powder with high impurity content, high zinc oxidation rate and 90-92% effective zinc, which can only be used for electrolyte purification in zinc hydrometallurgy. The traditional production method of metal zinc powder with a wider application range is to use high-quality zinc ingots as raw materials and produce them by blowing or atmospheric distillation. The disadvantage is that high-grade zinc ingots must be used as raw materials. , the obtained zinc powder has coarse particle size, high oxygen content and poor activity. Contents of the invention [0003] The purpose of this invention is to address the limitations of the existing electric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/20
Inventor 孙浩然
Owner 云南天浩稀贵金属股份有限公司
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