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Comprehensive utilization method of precious metal containing iron slag

A precious metal and iron slag technology, which is applied in the field of metal smelting tailings recycling, can solve the problems of high energy consumption, low comprehensive utilization rate, and influence on the smelting process of agglomerate matte making, and achieve the effect of low energy consumption

Inactive Publication Date: 2016-11-16
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In terms of utilization of precious metal-containing smelting iron slag, the Chinese invention patent with application number 201210042401.4 discloses a method of enriching valuable metals from tailings and smelting waste slag by pyrolysis, which uses mixed compaction and matte-making smelting technology Combined treatment of tailings and smelting waste residues, the main problems are: 1. Iron in tailings and smelting waste residues has not been recovered, and the comprehensive utilization rate is low; 2. Separate briquettes are required, so energy consumption is high; 3. Agglomerates It has an influence on the smelting process of matte making

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Iron slag components are Pb3.6%, Fe63.5%, Au2.5g / t iron slag, Ag52g / t iron slag.

[0016] Take 2 tons of iron slag, mix it with gypsum slag and quartz sand according to the mass ratio of 0.4:0.2:0.4, and put it into the lead smelting furnace together with the lead concentrate for smelting after granulation, and continuously inject hot air into the upper layer of the furnace body, The formed molten body is divided into a lead metal layer and a slag layer in the lower layer of the furnace body. After the gold and silver in the iron slag are melted, they enter the crude lead and are released at the lead outlet; the iron enters the slag layer, and enters the water quenching pool from the slag outlet to obtain Quenching slag: cast crude lead into the anode plate for electrolysis to obtain electrolytic lead and lead anode slime enriched with precious metal gold and silver; add 15% coke to the water quenching slag for reduction roasting to obtain crude iron and silicon slag.

...

Embodiment 2

[0021] Iron slag composition is Pb4.3%, Fe80.5%, Au3.8g / t iron slag, Ag125g / t iron slag.

[0022] Take 2 tons of iron slag, mix it with gypsum slag and quartz sand according to the mass ratio of 0.5:0.4:0.1, and put it into the lead smelting furnace together with the lead concentrate for smelting after granulation, and continuously inject hot air into the upper layer of the furnace body, The formed molten body is divided into a lead metal layer and a slag layer in the lower layer of the furnace body. After the gold and silver in the iron slag are melted, they enter the crude lead and are released at the lead outlet; the iron enters the slag layer, and enters the water quenching pool from the slag outlet to obtain Quenching slag: cast crude lead on the anode plate for electrolysis to obtain electrolytic lead and lead anode slime enriched with precious metal gold and silver; add 20% coke to the water quenching slag for reduction roasting to obtain crude iron and silicon slag.

...

Embodiment 3

[0027] Iron slag composition is Pb3.1%, Fe94.7%, Au1.5g / t iron slag, Ag45g / t iron slag.

[0028] Take 2 tons of iron slag, mix it with gypsum slag and quartz sand according to the mass ratio of 0.4:0.4:0.2, granulate it and put it into the lead smelting furnace together with the lead concentrate for smelting, and continuously inject hot air into the upper layer of the furnace body, The formed molten body is divided into a lead metal layer and a slag layer in the lower layer of the furnace body. After the gold and silver in the iron slag are melted, they enter the crude lead and are released at the lead outlet; the iron enters the slag layer, and enters the water quenching pool from the slag outlet to obtain Quenching slag: cast crude lead into the anode plate for electrolysis to obtain electrolytic lead and lead anode slime enriched with precious metal gold and silver; add 15% low calorific value coal to the water quenching slag for reduction roasting to obtain crude iron and s...

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Abstract

The invention discloses a comprehensive utilization method of precious metal containing iron slag, and belongs to the technical field of recovery and utilization of metal smelting tailings. The method is characterized in that the iron slag is treated as a fire lead smelting fluxing material to be fed into a smelting system; gold, silver and the like can be enriched to crude lead under the precious metal gathering effect of lead, so that the precious metal and the iron slag can be preliminarily separated; the crude lead is electrolyzed so as to enrich gold, silver and the like into lead anode sludge, and then the lead anode sludge is conveyed to a precious metal recovery system for directly recycling; the iron slag is reduced into crude iron and silicon slag through a reducing roasting technology, thus achieving high-value utilization. The method is in seamless transition with a lead smelting system; the iron slag is prevented from being individually briquetted, so that the energy consumption is low, a main system is prevented from any influence, and the process is clean and environmentally; the precious metals are effectively utilized, so that secondary pollution can be avoided, and the requirement of clean production is met.

Description

technical field [0001] The invention belongs to the technical field of recycling metal smelting tailings, and in particular relates to a method for comprehensive utilization of precious metal-containing iron slag. Background technique [0002] In the precious metal smelting process, some raw ores have high iron content, and the tailings are basically precious metal-containing iron slag. If the existing hydrometallurgy process is used for processing, a large amount of precious metal leaching reagents will be consumed, and the iron-containing Wastewater cannot be treated and has a great impact on the environment. Therefore, such materials are generally not effectively utilized by gold smelting enterprises, and are sold as iron slag (calculated at the iron price). It is a top priority to develop the land and reflect its economic value. [0003] In terms of utilization of precious metal-containing smelting iron slag, the Chinese invention patent with application number 2012100...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B13/02C22B1/02
CPCC22B1/02C22B7/001C22B7/04C22B13/02Y02P10/20
Inventor 鲁兴武王惠莹陈一博李俞良程亮易超李彦龙马爱军陈文波张恩玉杨刚曹桂银
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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