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Industrialized treatment method for deleading slag generated by pyrogenic-process antimony smelting

A technology for removing lead slag and smelting antimony, which is applied in the field of pyrotechnic antimony smelting, and achieves the effects of easy handling, improved melting and reduction reaction capabilities, and fast heating.

Active Publication Date: 2015-10-07
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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  • Industrialized treatment method for deleading slag generated by pyrogenic-process antimony smelting

Examples

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Embodiment 1

[0023] A method for carrying out industrialized treatment of lead-removing slag produced by pyrometallurgy, comprising the following steps:

[0024] (1) Selection of raw and auxiliary materials: A. The deleading slag is the deleading slag produced by using phosphate refining to remove lead during the reduction smelting process of the reverberatory furnace. The antimony content in the deleading slag is 15%, and the lead content is 3%. Iron filing wire with a diameter of 20cm is selected, C is alkali, soda ash is selected, and the mass fraction of sodium carbonate in 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 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 to particles with a diameter of 60mm;

[0026] (3) Melting and reduction: Add 4000kg of raw materials for removing lead...

Embodiment 2

[0033] A method for carrying out industrialized treatment of lead-removing slag produced by pyrometallurgy, comprising the following steps:

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

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

[0036] (3) Melting and reduction: Add 3000kg of lead slag removal charge after pretreatment in step (2) ...

Embodiment 3

[0040] A method for carrying out industrialized treatment of lead-removing slag produced by pyrometallurgy, comprising the following steps:

[0041] (1) Selection of raw and auxiliary materials: A. The deleading slag is the deleading slag produced by using phosphate refining to remove lead during the reduction smelting process of the reverberatory furnace. The antimony content in the deleading slag is 20%, and the lead content is 5%. Shavings select the iron filing wire that diameter is 10cm for use, and all the other are the same as embodiment 1.

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

[0043] (3) Melting and reduction: Add 3000kg of lead slag removal charge after pretreatment in step (2) into the furnace pool of the lead removal slag recycling furnace, and the two sides of the furnace pool of the lead removal slag recycling furnace are respectively There are 2 furnace doors, and then high-quality bituminous coal is added into the combustion chamber, a...

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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 fire method, and in particular relates to a method for treating lead-removing slag produced by adopting phosphate refining to remove lead during the reverberatory furnace reduction smelting process of antimony. Background technique [0002] Most of the lead associated with antimony ore enters the crude antimony during the process of pyrochemical smelting, and the final product, refined antimony or antimony trioxide, has strict requirements on the lead content. For this reason, removing lead is an indispensable process in the fire method of antimony smelting. From the point of view of lead slag removal process, reverberatory furnace reduction smelting is basically used to produce refined antimony, and phosphate is generally used as lead removal agent. During the refining process, phosphate and lead produce lead phosphate or lead metaphosphate to become floating The slag is separated f...

Claims

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Application Information

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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
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