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Clean production method of copper smelting smoke and lead-containing secondary material

A clean production and copper smelting technology, applied in the direction of improving process efficiency, can solve problems affecting normal production, increasing burden, unclear separation of copper matte, etc., to improve comprehensive economic benefits, effective separation and recovery, thorough and effective reaction Effect

Active Publication Date: 2020-09-18
方喜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the following disadvantages. First of all, 20-50% of the copper in the copper fume exists in an acid-insoluble form, and the recovery rate is not high. If the recovery rate is increased, it must be melted or burned during the leaching process. The use of strong oxidants will greatly increase the cost; secondly, because the lead slag contains a certain amount of copper, and the lead oxides will be converted into lead sulfate and other substances during the acid leaching process, which will increase the burden of post-process pyrolysis lead recovery. Due to the copper matte formed by sulfur and copper, the mixture of distillate and copper matte in the smelting process is formed, which hinders the normal progress of lead smelting and makes the separation of coarse lead slag and copper matte in the furnace unclear, resulting in serious entrainment of various metals. The metal recovery rate is not high. Due to the dual influence of copper and sulfur, the lead smelting recovery rate is low and the smelting process is difficult. The smelting cannot be produced normally, and even the furnace is dead. A large amount of low-grade copper matte is produced in the smelting process
In addition, because arsenic will accumulate in the smoke and dust during the smelting process, and serious entrainment in slag and products will also affect normal production. Therefore, it is of great significance to develop a clean production method for copper smelting smoke and lead-containing secondary materials.

Method used

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  • Clean production method of copper smelting smoke and lead-containing secondary material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Carry out according to the clean smelting process of the copper smelting smoke and dust, use 500 tons of copper-containing smelting smoke and dust, 150 tons of other lead materials, 243 tons of iron-containing materials, 107 tons of other auxiliary materials, and mix 1000 tons of bricks with a moisture content of 8.5%. Configuration main components: Pb is 18.31%, S is 6.42%, SiO 2 Fe is 19.76%, Fe is 18.25%, and CaO is 5.5%. Putting 150 tons per day into the blast furnace, the total output of crude lead is 150.29 tons, the lead yield is 88.6%, and matte copper is 153.48 tons, containing 5.26% copper and containing lead. 3.2%; output 112.35 tons of iron arsenide, slag composition: Pb 0.86%, Cu 0.45%, CaO 8.56%, Fe 22.34%, SiO 2 It is 30.33%. Under this process condition, the furnace condition is normal, the production is stable, and the separation of copper matte is normal.

Embodiment 2

[0061] Carry out according to the clean smelting process of copper smelting smoke and dust, use 500 tons of copper-containing smelting smoke and dust, 150 tons of other lead materials, 238 tons of iron-containing materials, 112 tons of other auxiliary materials, and mix 1000 tons of bricks with a moisture content of 9%. Configuration main components: Pb is 22.56%, S is 7.26%, Fe is 19.11%, SiO 2 CaO is 21.22%, CaO is 5.8%, put into the blast furnace according to the amount of 150 tons per day, the total output of crude lead is 190.56 tons, the lead recovery rate is 90.45%, matte copper is 148.28 tons, copper is 5.85%, and lead is 3.35%; output 108.45 tons of iron arsenide, slag composition: Pb 0.78%, Cu 0.35%, CaO 9.23%, Fe 23.45%, SiO 2 It is 32.23%. Under this process condition, the furnace condition is normal, the production is stable, and the separation of copper matte is normal.

Embodiment 3

[0063] Implement according to the process flow of the clean smelting method of copper smelting dust, use 500 tons of copper-containing smelting dust, 120 tons of other lead materials, 256 tons of iron-containing materials, 74 tons of other auxiliary materials, and mix 1000 tons of bricks for molding, with a moisture content of 10%. Configuration main components: Pb is 21.85%, S is 7.55%, Fe is 20.25%, SiO 2 CaO is 16.35%, CaO is 8.86%, put into the blast furnace according to the amount of 150 tons per day, the total output of crude lead is 165.44 tons, the lead recovery rate is 81.23%, matte copper is 198.28 tons, copper is 3.85%, and lead is 1.56%. 98.56 tons of iron arsenide, slag composition: Pb is 2.97%, Cu is 0.54%, CaO is 13.03%, Fe is 28.88%, SiO 2 It is 24.04%. Under this process condition, the furnace condition is abnormal, the production is unstable, the copper content in the copper matte separation is low, the lead content is high, and the lead yield is low.

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Abstract

The invention discloses a clean production method of copper smelting smoke and a lead-containing secondary material, and aims to provide a method for smelting smoke using copper and smelting lead using the lead-containing secondary material. The clean production method comprises the steps that silicon, calcium-containing oxide materials, iron-containing oxides and binders are added to copper smelting smoke and / or the lead-containing secondary material and are batched in batches; water is added and the materials are mixed to form a material with a certain shape; and after the material is stacked to solidify and harden, the material is mixed with coke to complete preheating, reduction, smelting and separation in a blast smelting furnace, and metals are recovered in layers. The clean production method uses the principle of preferential formation of copper matte between sulfur and copper without using sintering desulfurization and molten pool smelting conditions, and reaction characteristics of SiO2 with slag, copper matte, and iron oxide during the smelting process. Slag type is adjusted to overcome harmful effects of copper, sulfur, and arsenic on the production process in traditional lead smelting, and the goal of effectively separating and recovering copper, lead, arsenic, sulfur and other metals is achieved. Not only can the problem of environmental protection in the lead smelting process be solved, but also the overall economic benefits of production can be improved.

Description

technical field [0001] The invention belongs to the technical field of heavy metal recovery and pollution prevention, and specifically relates to a simple, reliable and easy-to-implement method developed for the main harmful impurities copper, sulfur and arsenic remaining in the traditional lead smelting process. Background technique [0002] Copper smelting dust usually contains 3-15% copper, 10-30% lead, 1-6% bismuth, 1-3% tin, 5-20% zinc, 3-15% arsenic, and For a small amount of rare metals such as indium, germanium, gold, and silver, the usual recycling process is to first use the wet method to recover zinc, copper, bismuth, arsenic, and then use the fire method to recover lead and other metals. This method has the following disadvantages. First of all, 20-50% of the copper in the copper fume exists in an acid-insoluble form, and the recovery rate is not high. If the recovery rate is increased, it must be melted or burned during the leaching process. The use of strong o...

Claims

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Application Information

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IPC IPC(8): C22B7/02C22B1/248C22B1/244C22B1/243C22B13/02C22B15/00
CPCC22B7/02C22B7/001C22B1/243C22B1/244C22B1/248C22B13/025C22B15/0056Y02P10/20
Inventor 方喜张跃萍
Owner 方喜
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