A method for recycling tin from lead-containing tin waste slag

A technology of tin waste slag and lead-tin, which is applied in the field of recycling tin from lead-containing tin waste slag, can solve the problems of large environmental pollution, high cost of secondary smelting, poor metal separation, etc., achieve significant economic benefits, reduce consumption of refined tin, and effectively utilize Effect

Active Publication Date: 2018-06-08
安徽省金鸿再生资源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Tin is widely used in many fields, especially the electronics and material industries. China’s tin ore resource reserves rank first in the world. Tin, antimony, tungsten, and rare earth have become China’s four major strategic resources. At present, most lead smelting enterprises are Kaiku is in the form of tin slag, blowing from the reverberatory furnace to achieve the purpose of recycling tin. The production process of its tin recovery technology is that when the crude lead is melted and cast in the anode pot, 40% of the tin enters the copper removal scum, and 60% enters the crude lead anode plate ; 40% of the tin in the crude lead anode plate is resolved together with the lead during the lead wet point solution, and 60% enters the lead electrolysis anode slime; Lead slag is smelted in a reverberatory furnace to obtain tin slag; when lead anode slime is smelted in a reverberatory furnace, 80% of the tin enters the blown slag, 10% enters the noble lead, and 10% enters the slag. Since the tin-containing slag contains high precious metals, it cannot Directly open the circuit, the tin-containing slag must be repeatedly returned to the furnace for smelting, and the metal separation of the tin-blown slag produced by the slag is poor. The metal lead, bismuth, and silver carried away with the slag are more, especially antimony, which accounts for about 13% of the total antimony amount fed. , which increases the secondary smelting cost of repeated treatment, the output tin slag contains low tin content (10-20%), and the price is low. Some lead smelting enterprises also use reverberatory furnace blowing to directly enrich tin from crude lead to obtain tin Slag blowing, after repeated reduction and smelting of tin blowing slag to obtain a tin alloy with a composition comparable to that of crude solder, and then send it to the tin factory for electrolysis or other processes for recycling. This recycling method still has high energy consumption and large environmental pollution. During the production process The secondary smelting cost of repeated processing is high. These methods are aimed at treating the tin-containing slag in different stages of lead smelting to achieve the purpose of recycling tin. This treatment method exists in the dispersion of tin into different intermediate or final products. Added tin recycling program, and tin as a by-product also affects the quality of lead

Method used

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Examples

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Effect test

Embodiment 1

[0020] A method for reclaiming tin from lead-containing tin waste slag, comprising the following contents:

[0021] (1) Prepare raw materials by weight, 200 parts of lead-tin waste residue, 15 parts of limestone, 47 parts of anthracite, 45 parts of quartz stone, 68 parts of vinegar sawdust, 110 parts of orange peel oil, and 11 parts of adsorbent;

[0022] (2) Lead-tin waste residue, limestone, anthracite, quartz stone, vinegar wood chips, and adsorbent are transported to the side-blowing furnace workshop through sealed conveying pipelines, and then mixed according to the proportion, and added to the smelting furnace for smelting. The smelting process is divided into three stage:

[0023] a. In the oxidation smelting stage, the temperature of the melting pool is controlled at 870°C, the oxygen concentration of oxygen-enriched air is controlled at 80%, and the proportion of orange peel oil in the oxygen introduced is 6%, and the chemical reaction in the furnace is carried out wh...

Embodiment 2

[0030] A method for reclaiming tin from lead-containing tin waste slag, comprising the following contents:

[0031] (1) Prepare raw materials by weight, 200 parts of lead-tin waste residue, 11 parts of limestone, 50 parts of anthracite, 42 parts of quartz stone, 65 parts of vinegar sawdust, 100 parts of orange peel oil, and 9 parts of adsorbent;

[0032] (2) Lead-tin waste residue, limestone, anthracite, quartz stone, vinegar wood chips, and adsorbent are transported to the side-blowing furnace workshop through sealed conveying pipelines, and then mixed according to the proportion, and added to the smelting furnace for smelting. The smelting process is divided into three stage:

[0033] a. In the oxidation smelting stage, the temperature of the molten pool is controlled at 800°C, the oxygen concentration of oxygen-enriched air is controlled at 80%, and the proportion of orange peel oil in the oxygen introduced is 7%, and the chemical reaction in the furnace is carried out whil...

Embodiment 3

[0039] A method for reclaiming tin from lead-containing tin waste slag, comprising the following contents:

[0040] (1) Prepare raw materials by weight, 200 parts of lead-tin waste residue, 18 parts of limestone, 45 parts of anthracite, 47 parts of quartz stone, 70 parts of vinegar sawdust, 120 parts of orange peel oil, and 13 parts of adsorbent;

[0041] (2) Lead-tin waste residue, limestone, anthracite, quartz stone, vinegar wood chips, and adsorbent are transported to the side-blowing furnace workshop through sealed conveying pipelines, and then mixed according to the proportion, and added to the smelting furnace for smelting. The smelting process is divided into three stage:

[0042] a. In the oxidation smelting stage, the temperature of the molten pool is controlled at 1000°C, the oxygen concentration of the oxygen-enriched air is controlled at 80%, the ratio of orange peel oil in the oxygen introduced is 8%, and the chemical reaction in the furnace is carried out while t...

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Abstract

The invention belongs to the technical field of recycling tin from crude lead, and particularly relates to a method for recycling tin from lead-containing tin waste residues. The method comprises the following steps of: raw material preparation, three-stage smelting, refined in preparation and crystallized tin preparation. Compared with the prior art, the method has the advantages that: iron content in crude tin can be effectively controlled by regulating and controlling raw materials and conditions of a smelting process, energy consumption in the smelting process is reduced, tin can be reduced to the greatest extent, refined tin consumption also can be reduced while comprehensive utilization is realized, tin removal efficiency is 99% or more, tin content in lead is smaller than 0.0001%, effective utilization of product resources is realized, energy consumption at a lead and tin separating stage is relatively small, and economic benefits are remarkable.

Description

technical field [0001] The invention belongs to the technical field of recovering tin from crude lead, and in particular relates to a method for recovering tin from lead-containing tin waste residue. Background technique [0002] Tin is widely used in many fields, especially the electronics and material industries. China’s tin ore resource reserves rank first in the world. Tin, antimony, tungsten, and rare earth have become China’s four major strategic resources. At present, most lead smelting enterprises are Kaiku is in the form of tin slag, blowing from the reverberatory furnace to achieve the purpose of recycling tin. The production process of its tin recovery technology is that when the crude lead is melted and cast in the anode pot, 40% of the tin enters the copper removal scum, and 60% enters the crude lead anode plate ; 40% of the tin in the crude lead anode plate is resolved together with the lead during the lead wet point solution, and 60% enters the lead electrolys...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C22B7/04C22B25/06C22B25/02C22B25/08C22B9/02C22B9/10C22B9/04
CPCC22B7/04C22B9/02C22B9/04C22B9/10C22B25/02C22B25/06C22B25/08Y02P10/20
Inventor赵玉华
Owner安徽省金鸿再生资源科技有限公司