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Method for resource comprehensive utilization of lead-zinc smelting slag

A technology of smelting slag and lead-zinc, which is applied to the improvement of process efficiency and cement production, etc. It can solve the problem that the valuable metals in smelting slag cannot be recovered comprehensively, and achieve the effects of high recovery rate, improved production efficiency and reduced reduction time

Active Publication Date: 2020-05-01
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to overcome the above problems, the present invention transforms FeO-SiO 2 -CaO ternary slag transforms into SiO 2 -CaO binary system slag; during the slag type reconstruction process, lead and zinc in lead and zinc smelting slag are reduced to gaseous metal lead and zinc, and then oxidized in the flue gas to form lead and zinc oxides to obtain valuable metals such as lead and zinc Soot and metallized agglomerates are clarified and separated at high temperature to obtain metallic iron nuggets and SiO 2 -CaO binary system slag, the binary system slag can be used to produce different types of cement after adjusting the composition, which solves the problem that the valuable metals in the smelting slag in the prior art cannot be comprehensively recovered to a certain extent, and realizes iron, lead Efficient recovery and utilization of components such as , zinc, tin, etc., and the final slag can be used as a resource, and no waste slag is generated

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for comprehensive utilization of lead-zinc smelting slag resources. In this embodiment, the lead-zinc smelting slag contains the following chemical components in mass percentage: Zn 7.96%, Pb 0.49%, Sn 0.11%, FeO 20.09%, CaO 19.76%, SiO 2 24.74%, MgO1.12%, Al 2 o 3 1.06%, S 0.11%, the specific implementation steps are as follows:

[0032] (1) Material pretreatment

[0033] Ingredients: Mix the dried lead-zinc smelting slag with slag-type restructuring agent, additives and binders, and mix evenly to obtain the base material. The slag-type restructuring agent is coal powder, and the dosage is lead-zinc smelting slag 10% of the weight; the additive is lime, and the additive amount is 1% of the weight of the lead-zinc smelting slag; the binder is clay, and the adding amount is 0.5% of the weight of the lead-zinc smelting slag;

[0034] Agglomeration: making the reduced base material into agglomerates to obtain a 2mm agglomerate with a certain strength;

[00...

Embodiment 2

[0041] A method for comprehensive utilization of lead-zinc smelting slag resources. In this embodiment, the lead-zinc slag contains the following chemical components in mass percentages: Zn 1.0%, Pb 5.0%, Sn 0.98%, FeO 35.0%, CaO 9.02%, SiO 2 13.45%, MgO 4.89%, Al 2 o 3 9.93%, S 1.05%, the specific implementation steps are as follows:

[0042] (1) Material pretreatment

[0043] Ingredients: Mix the dried lead-zinc smelting slag with slag-type restructuring agent, additives and binders, and mix evenly to obtain the base material. The slag-type restructuring agent is coal powder, and the dosage is lead-zinc smelting slag 10% of the weight; the additive is lime, and the additive amount is 10% of the weight of the lead-zinc smelting slag; the binder is clay, and the adding amount is 1% of the weight of the lead-zinc smelting slag;

[0044] Agglomeration: making the reduced base material into agglomerates to obtain a 6mm agglomerate with a certain strength;

[0045] Drying: ...

Embodiment 3

[0051] A method for comprehensive utilization of lead-zinc smelting slag resources. In this embodiment, the lead-zinc slag contains the following chemical components in mass percentage: Zn 2.83%, Pb0.78%, Sn 0.15%, FeO 25.74%, CaO10.31%, SiO 2 20.91%, MgO 2.5%, Al 2 o 3 4.56%, 0.65%, the specific implementation steps are as follows:

[0052] (1) Material pretreatment

[0053] Ingredients: mix the dried lead-zinc smelting slag with slag-type restructuring agent, additives and binders, and mix evenly to obtain the base material. The slag-type restructuring agent is coke, and the dosage is the weight of lead-zinc smelting slag 30%; the additive is quartz stone, and the additive amount is 15% of the weight of the lead-zinc smelting slag; the binder is lime, and the adding amount is 5% of the weight of the lead-zinc smelting slag;

[0054] Agglomeration: making the reduced base material into agglomerates to obtain a 3mm agglomerate with a certain strength;

[0055] Drying: dr...

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Abstract

The invention discloses a method for resource comprehensive utilization of lead-zinc smelting slag. Dried lead-zinc smelting slag, a slag type reconstruction agent, an additive and a binder are mixedand prepared, and after uniform mixing, a base material is obtained; the base material is briquetted, after drying, slag type reconstruction is carried out, oxide smoke rich in zinc and lead valuablemetal and metallization blocks are obtained; the smoke serves as raw materials for extraction of zinc and lead; and the metallization blocks are subjected to clarification separation in a high-temperature clarification separation device at the temperature ranging from 1350 DEG C to 1650 DEG C, iron blocks with the iron content larger than 90% and SiO2-CaO binary slag are obtained, and the SiO2-CaObinary slag serves as cement raw materials. According to the method, the problems that in an existing pyrogenic smelting method based on FeO-SiO2-CaO ternary system slag types, low-grade lead-zinc smelting slag is hard to treat is solved, the resource waste and environment problems caused by waste lead-zinc smelting slag are avoided, and good economic, social and environment benefits are achieved.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of lead-zinc smelting slag resources, and in particular relates to a method for comprehensive utilization of lead-zinc smelting slag resources. Background technique [0002] Lead smelting methods are divided into two categories: traditional method and direct lead smelting method. Before 2002, my country's lead smelting has been using the traditional sintering-blast furnace smelting process. Although the lead smelters put into operation or to be built in recent years mostly adopt advanced smelting technology, at present, the traditional process is still the main method for lead smelting in my country, and the output accounts for more than 50% of the output of mineral lead. [0003] Zinc smelting is mainly based on hydrometallurgy, accounting for about 85% of zinc production; pyrometallurgy accounts for 15%. The leaching slag obtained in the conventional zinc hydrometallurgy process usuall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B7/02C22B1/24C21B13/00C22B13/02C22B19/20C22B19/30C22B25/02C22B25/06C04B7/153
CPCC22B7/04C22B7/02C22B1/2406C21B13/00C22B13/025C22B19/20C22B19/30C22B25/02C22B25/06C04B7/153Y02P10/20Y02P40/10
Inventor 魏昶李旻廷李兴彬邓志敢
Owner KUNMING UNIV OF SCI & TECH
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