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A method for comprehensive utilization of lead-zinc smelting slag resources

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

Active Publication Date: 2022-04-12
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%, MgO 1.12%, 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%, MgO4.89%, 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: d...

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%, MgO2.5%, 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: dry...

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Abstract

The invention discloses a method for comprehensive utilization of lead-zinc smelting slag resources. The dried lead-zinc smelting slag is mixed with a slag-type reconstruction agent, an additive and a binder, and the base material is obtained after mixing evenly; After drying, slag-type reconstruction is carried out to obtain oxide fumes and metallized agglomerates rich in zinc and lead valuable metals; the soot is used as the raw material for extracting zinc and lead; Clarification and separation are carried out in the high-temperature clarification and separation device to obtain iron nuggets and SiO containing more than 90% iron 2 ‑CaO binary slag, SiO 2 ‑CaO binary system slag is used as cement raw material; the present invention solves the existing problems based on FeO‑SiO 2 ‑CaO ternary slag type pyrometallurgy method is difficult to deal with the problem of low-grade lead-zinc smelting slag, avoids resource waste and environmental problems caused by waste lead-zinc smelting slag, and has good economic, social and environmental benefits.

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 Patents(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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