Technology for cleanly and efficiently processing lead-bearing waste residues

A waste residue, high-efficiency technology, applied in the field of metallurgy, can solve problems such as equipment corrosion, difficulty in raw material preparation, and poor adaptability of raw materials

Pending Publication Date: 2018-12-07
个旧市沙甸永和冶炼厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is mainly to provide a clean and efficient process for treating lead-containing waste residues in view of the problems of low resource recovery rate, poor raw material adaptability, equipment corrosion and raw material preparation difficulties in the existing treatment technology.

Method used

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  • Technology for cleanly and efficiently processing lead-bearing waste residues

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A clean and efficient process for treating lead-containing waste residues is completed according to the following steps:

[0020] (1) The lead-containing waste slag produced by lead smelting (refractory blast furnace slag, rotary kiln slag, reverberatory slag, fuming slag, etc.) produced in the lead smelting production process is mixed with lime at a mass ratio of 1:0.05, at 1200~ The lead-containing slag is pressed at 1300°C into a block, usually in the shape of a brick, and dried naturally for 3 to 5 days; the main components of the lead-containing waste slag are: Pb10-30%, silver 100-130g / t, SO 2 15-25%, Fe15-35%, CaO6-15%;

[0021] Proportioning is carried out according to the mass percentage of 10% coke, 10% silicon dioxide, and 80% lead-containing slag;

[0022] (2) Add the ingredients to the smelting furnace in sequence, the order of feeding is to add coke first, then add lead-containing slag, and finally add silicon dioxide;

[0023] The melting furnace is as ...

Embodiment 2

[0026] A clean and efficient process for treating lead-containing waste residues is completed according to the following steps:

[0027] (1) The rotary kiln slag and lime produced by lead smelting are mixed in a mass ratio of 1:0.03, pressed into massive lead-containing slag at 1200-1300°C, and dried naturally for 3-4 days; 15% by mass Coke, 11% silicon dioxide, and 74% lead-containing slag are used for batching;

[0028] (2) Add the ingredients in order such as figure 1 In the five-stage integrated smelting furnace shown, the order of feeding is first to add coke, then lead-containing slag, and finally silicon dioxide;

[0029] (3) Ignite and start the furnace for oxygen-enriched enhanced smelting. The material passes through the preheating section 2, sintering section 3, semi-melting section 4, smelting section 5 and layered section 6 in the furnace to complete the smelting process of the material; industrial oxygen passes through the ventilation Port 7 enters the furnace ...

Embodiment 3

[0031] A clean and efficient process for treating lead-containing waste residues is completed according to the following steps:

[0032] (1) Mix the rotary kiln slag and lime produced by lead smelting in a mass ratio of 1:0.07, press it into massive lead-containing slag at 1200-1300°C, and dry it naturally for 4-5 days; 7% by mass Coke, 9% silicon dioxide, and 84% lead-containing slag are used for batching;

[0033] (2) Add the ingredients in order such as figure 1 In the five-stage integrated smelting furnace shown, the order of feeding is first to add coke, then lead-containing slag, and finally silicon dioxide;

[0034] (3) Ignite and start the furnace for oxygen-enriched enhanced smelting. The material passes through the preheating section 2, sintering section 3, semi-melting section 4, smelting section 5 and layered section 6 in the furnace to complete the smelting process of the material; industrial oxygen passes through the ventilation Port 7 enters the furnace to sup...

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Abstract

Disclosed is a technology for cleanly and efficiently processing lead-bearing waste residues. The lead-bearing waste residues produced by lead smelting and lime are matched according to the mass ratioof 1:0.03-0.07 and are then pressed into blocky lead-bearing residue blocks, and after natural drying, by mass, 7%-15% of coke, 9%-11% of silica and 74%-84% of the lead-bearing residue blocks are matched. Materials are sequentially added into a five-section integrated type smelting furnace, ignition blowing-in is conducted for oxygen-enriched intensified smelting, materials added from a smeltingfurnace feeding section (1) pass through a preheating section (2), a sintering section (3), a half-melting section (4), a smelting section (5) and a layering section (6), and the smelting process of the materials is completed. Through the technology, material preheating, sintering, smelting and clarification laying are integrated, heavy metal, valuable metal, gangue and the like are selectively separated well, dangerous waste is processed cleanly and efficiently, and the technology has the advantages that the process is short, operation is simple and convenient, and investment is small.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a treatment process for lead-containing waste residue produced by lead smelting. Background technique [0002] Lead-containing waste slag is the waste slag produced by lead smelting, mainly from blast furnace slag, rotary kiln slag, reverberatory slag, fuming furnace slag, etc. Its main valuable metal is lead, some of which contain silver, zinc, etc., and some heavy metals such as arsenic. This kind of waste residue has dual characteristics. On the one hand, it contains heavy metals such as lead, which will have a certain impact on the environment if it is not disposed of effectively; on the other hand, the content of valuable metals is low, making it difficult to develop and utilize. [0003] At present, the methods for recovering valuable elements from lead slag mainly include cement co-processing method, direct reduction method, leaching method, electrolysis method, flotat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B13/02C22B7/04
CPCC22B7/001C22B7/04C22B13/025Y02P10/20
Inventor 于站良黄兴文杨子轩张振华钱琪所
Owner 个旧市沙甸永和冶炼厂
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