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A method for industrialized treatment of lead-removing slag produced by fire antimony smelting

A technology for removing lead slag and smelting antimony, which is applied in the field of antimony smelting by fire method, and achieves the effects of sufficient combustion, high comprehensive recovery rate, and high thermal efficiency

Active Publication Date: 2016-11-09
云南祥云中天锑业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to carry out industrialized batch processing of the lead-removing slag through the lead-removing slag remelting furnace, and the operation is simple, the heating is fast, the thermal efficiency is high, and the melting and reduction reactions are sufficient , the production process does not produce three wastes, can effectively improve the comprehensive recovery rate of antimony and lead in the lead removal slag, and basically has no pollution to the environment

Method used

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  • A method for industrialized treatment of lead-removing slag produced by fire antimony smelting
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Examples

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Effect test

Embodiment 1

[0023] A method for carrying out industrialized treatment to the lead-removing slag produced by pyrochemical smelting of antimony, comprising the processing steps of the following sequence:

[0024] (1) Selection of raw and auxiliary materials: A lead-removing slag selects lead-removing slag produced by phosphate refining and lead-removing in the reverberatory furnace reduction smelting process. The antimony content in the lead-removing slag is 15% and the lead content is 3%. Iron filings with a diameter of 20cm are used, soda ash is used for C alkali, the mass fraction of sodium carbonate in the soda ash is 95%; D bituminous coal is selected from high-quality bituminous coal with a particle size of 25mm, the mass fraction of fixed carbon in the bituminous coal is 55%, and the ash content is 15% %, the moisture content is 4%;

[0025] (2) Raw material pretreatment: crush the lead removal slag into particles with a diameter of 60mm;

[0026] (3) Melting and reduction: 4000kg o...

Embodiment 2

[0033] A method for carrying out industrialized treatment to the lead-removing slag produced by pyrochemical smelting of antimony, comprising the processing steps of the following sequence:

[0034] (1) Selection of raw and auxiliary materials: A lead-removing slag selects lead-removing slag produced by phosphate refining and lead-removing in the reverberatory furnace reduction smelting process. The antimony content in the lead-removing slag is 30% and the lead content is 10%. Iron filings with a diameter of 3cm are selected, soda ash is selected as C alkali, and the mass fraction of sodium carbonate in soda ash is 96%; D bituminous coal is selected as high-quality bituminous coal with a particle size of 15mm, the mass fraction of fixed carbon in the bituminous coal is 60%, and the percentage of ash content is 20%, and the moisture content is 6%;

[0035] (2) Raw material pretreatment: crush the lead removal slag into particles with a diameter of 80mm;

[0036] (3) Melting an...

Embodiment 3

[0040] A method for carrying out industrialized treatment to the lead-removing slag produced by pyrochemical smelting of antimony, comprising the processing steps of the following order:

[0041] (1) Selection of raw and auxiliary materials: A lead-removing slag is the lead-removing slag produced by phosphate refining and lead-removing in the reverberatory furnace reduction smelting process. The antimony content in the lead-removing slag is 20%, the lead content is 5%, and the iron The scraps were selected as iron filings with a diameter of 10 cm, and the rest were the same as those in Example 1.

[0042] (2) Raw material pretreatment: same as Example 1.

[0043] (3) Melting and reduction: add the 3000kg of lead-removing slag charge after pretreatment in step (2) into the furnace pool of the lead-removing slag re-smelting furnace, and the two sides of the lead-removing slag re-smelting furnace are respectively There are 2 furnace doors, and then high-quality bituminous coal i...

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Abstract

The invention discloses an industrialized treatment method for deleading slag generated by pyrogenic-process antimony smelting, belonging to the technical field of pyrogenic-process antimony smelting. The method sequentially comprises the following steps: (1) raw and auxiliary material selection: the sum of mass of antimony and lead in the deleading slag is greater than or equal to 18%, the scrap iron adopts a scrap iron wire with the diameter of 3-20cm, the alkali adopts soda ash in which the mass percent of sodium carbonate is greater than or equal to 95%, and the bituminite adopts high-quality bituminite with the particle size of 15-25mm; (2) raw material pretreatment: crushing the deleading slag to obtain granules with the diameter of 60-80mm; (3) melting and reducing; (4) slag removal; (5) discharging; and (6) dust collection. By performing industrialized mass treatment on the deleading slag through a deleading slag reprocessing furnace, the method is simple to operate, has the advantages of high heating speed, high heat efficiency and sufficient melting and reduction reaction, does not generate three wastes in the production process, can effectively enhance the comprehensive recovery rate of antimony and lead in the deleading slag, and lowers the antimony and lead content in the scum to 0.5% and below.

Description

technical field [0001] The invention belongs to the technical field of antimony smelting by pyrotechnics, and in particular relates to a method for treating lead-removing slag produced by phosphate refining and lead-removing in a reverberatory furnace reduction smelting process of antimony. Background technique [0002] The lead associated with antimony ore will mostly enter crude antimony in the process of antimony smelting, and the final product, refined antimony or antimony trioxide, has strict requirements on lead content. For this reason, lead removal is an indispensable process in the pyrometallurgical smelting of antimony. From the perspective of the lead slag removal process, the production of refined antimony is basically still based on reverberatory furnace reduction smelting. Phosphate is generally used as a lead removal agent. During the refining process, phosphate and lead generate lead phosphate or lead metaphosphate and become floating The slag is separated f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B30/02
CPCY02P10/20
Inventor 张玉良谭大国姚光合
Owner 云南祥云中天锑业有限责任公司