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Method for comprehensively recovering valuable metals from zinc smelting slag

A technology for valuable metals and zinc smelting slag, which is applied in the field of comprehensive recovery of valuable metals and synchronous recovery of multiple valuable metals from zinc smelting slag, which can solve the secondary pollution of final slag, low comprehensive utilization of resources, heavy metal elements No problems such as solidification have been achieved, and the effect of high recovery rate of valuable metals, strong material adaptability, and comprehensive utilization can be achieved

Inactive Publication Date: 2014-04-09
KUNMING UNIV OF SCI & TECH TECH IND SALES MANAGEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] From the above analysis, it can be seen that the current methods for dealing with zinc smelting slag or zinc smelting smelting method only recycle one of the slags, and the recovered metals are only one or a small amount of metals, and the comprehensive utilization rate of resources is low; At the same time, most of the heavy metal elements remaining in the slag treatment process have not been solidified, and the final slag produced has secondary pollution

Method used

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  • Method for comprehensively recovering valuable metals from zinc smelting slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 : Blast furnace slag, alumite slag and lead-silver slag taken from a factory, its chemical composition is respectively: Blast furnace slag: Zn 9.5%, Pb 9.2%, Cu 1.5%, Fe 27.6%, In 15g / t, Ag 33g / t t, Au 1g / t; Lead-silver slag: Zn 6.2%, Pb5.5%, Cu 1.2%, In 210g / t, Ag 195g / t, Au 1g / t; Alumite slag: Zn 4.5%, Pb 4.1% , Cu 0.4%, In 35g / t, Ag 122g / t, Au 1.2g / t. Get respectively 100kg of the above-mentioned blast furnace slag, 200kg of alumina slag, and 100kg of lead-silver slag (the mass ratio of alumina slag: lead-silver slag: blast furnace slag is 1:2:1), and the blast furnace slag, alumina slag and lead-silver slag that will be taken out are The slag was mixed with a tank mixer for 5 minutes, and 20kg of water was added during the mixing process. It was detected that the water content of the mixture was 12%. The mixture was compacted with a hydraulic molding machine, and the agglomerate was dried at 30° C. for 72 hours to obtain 393 kg of dried agglomerate. Add ...

Embodiment 2

[0038] Example 2: Blast furnace slag, jarosite slag and lead-silver slag taken from a factory, their chemical composition are: blast furnace slag: Zn 7.2%, Pb 0.47%, Cu 0.98%, In 31g / t, Ag 24g / t, Au 0.4g / t. Lead-silver slag: Zn 6.9%, Pb 5.9%, Cu 0.42%, In 131g / t, Ag 113g / t, Au 2g / t; Alumite slag: Zn 5.3%, Pb 4.7%, Cu 0.28%, In 45g / t t, Ag 126g / t, Au 0.2g / t. Get respectively 150kg of the above-mentioned blast furnace slag, 300kg of alumina slag, and 100kg of lead-silver slag (the mass ratio of alumina slag: lead-silver slag: blast furnace slag is 1.5:3:1), and the blast furnace slag, alumina slag and lead-silver slag that will be taken out are The slag was mixed with a tank mixer for 8 minutes, and 44kg of water was added during the mixing process. It was detected that the water content of the mixture was 14%. The mixture was compacted with a hydraulic forming machine, and the agglomerate was dried at 100° C. for 48 hours to obtain 517 kg of dried agglomerate. Add 517kg o...

Embodiment 3

[0040] Example 3: Blast furnace slag, alumite slag and lead-silver slag taken from a factory, their chemical composition are: blast furnace slag: Zn 7.5%, Pb 0.43%, Cu 1.01%, In 24g / t, Ag 12g / t, Au 0.3g / t; Lead-silver slag: Zn 7.2%, Pb 5.3%, Cu 0.74%, In 125g / t, Ag 161g / t, Au 2.1g / t; Alumite slag: Zn 5.9%, Pb 3.6%, Cu 0.86% , In 72g / t, Ag 92g / t, Au 0.32g / t. Get respectively 200kg of above-mentioned blast furnace slag, 400kg of alumina slag, and 100kg of lead-silver slag (the mass ratio of alumina slag: lead-silver slag: blast furnace slag is 2:4:1), and the blast furnace slag, alumina slag and lead-silver slag that will take out The slag was mixed with a tank mixer for 10 minutes, and 70kg of water was added during the mixing process. It was detected that the water content of the mixture was 18%. The mixture was compacted with a hydraulic molding machine, and the agglomerate was dried at 200° C. for 12 hours to obtain 644 kg of dried agglomerate. Add 644kg dry agglomerate...

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Abstract

The invention relates to a method for comprehensively recovering valuable metals from zinc smelting slag, belonging to the technical fields of metallurgy and chemical industry. The method comprises the following steps: proportioning blast furnace slag, iron alum slag and lead silver slag in a mass ratio of (1-2):(2-4):1, mixing, briquetting and drying; smelting the briquette, coke and a fluxing agent in a mass ratio of (4-8):(0.5-2):1 in a matting furnace at 1050-1400 DEG C; collecting dust from matting furnace gas to obtain indium-rich zinc oxide smoke dust; and settling the fused mass while keeping temperature at 1000-1400 DEG C to obtain lead copper matte and harmless furnace slag. The method implements synchronous enrichment and recovery of valuable elements in the zinc smelting slag by the one-step smelting process, and has the characteristics of simple technical process, high comprehensive recovery rate of valuable metals, high cleanness and high efficiency.

Description

technical field [0001] The invention relates to a method for comprehensively recovering valuable metals from zinc smelting slag, which belongs to the technical field of metallurgy and chemical industry, and in particular relates to a new technology for synchronously recovering multiple valuable metals from zinc smelting slag. Background technique [0002] Zinc smelting processes are mainly divided into two categories: pyrometallurgy and hydrometallurgy. At present, the dominant zinc smelting method is hydrometallurgy, which accounts for more than 80% of zinc production. High-temperature and high-acid leaching in wet zinc smelting is a commonly used zinc smelting method. The feature of this method is that the neutral leaching slag is leached with hot acid, zinc and iron are dissolved into the leaching solution, and insoluble elements such as lead, silver, and copper are If it is not leached, it forms the final leaching slag—lead-silver slag; at the same time, in order to remo...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B15/00C22B19/36C22B11/00C22B13/00C22B58/00
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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