High-antimony bismuth-containing material treatment technology

A processing technology and material technology, applied in the processing technology field of high antimony and bismuth-containing materials, can solve the problems of high time consumption, high cost and high energy consumption

Active Publication Date: 2014-08-20
JIANGXI COPPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For many years, various bismuth manufacturers have been using traditional processes to process this material, that is, the material is directly reduced and smelted in a reverberatory furnace to obtain rough bismuth, and the rough bismuth is refined and removed to obtain 99.99% refined bismuth products. Refining and removing antimony takes a lot of time, High fuel consumption, long operation cycle and low production efficiency
Due to the grade of antimony in the material is 10-30% in this process, the content of antimony in crude bismuth reaches 15-20%. The traditional bismuth refining process requires high energy consumption and high cost.

Method used

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  • High-antimony bismuth-containing material treatment technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Reverberatory furnace reduction smelting process

[0025] The high-antimony bismuth-containing material mainly contains Sb and a small amount of Cu impurity elements. The high-antimony bismuth-containing material and bismuth sulfide are mixed evenly, and then added to the reverberatory furnace together with lime, soda ash, iron filings and coke powder for reduction smelting. 500°C and smelting time of 2 hours. After the smelting is over, remove the slag to obtain thick bismuth, thin slag and sticky slag for later use; wherein, the amount of bismuth sulfide added is 20% by mass of the high-antimony bismuth-containing material, and the lime The addition accounts for 8% of the mass percentage of high antimony and bismuth-containing materials, the addition of said soda ash accounts for 20% of the mass percentage of high antimony and bismuth-containing materials, and the addition of said iron filings accounts for 5% of the mass percentage of high antimony and bismuth-cont...

Embodiment 2

[0039] (1) Reverberatory furnace reduction smelting process

[0040] The high-antimony bismuth-containing material mainly contains Sb and a small amount of Cu impurity elements. The high-antimony bismuth-containing material and bismuth sulfide are mixed evenly, and then added to the reverberatory furnace together with lime, soda ash, iron filings and coke powder for reduction smelting. 600°C, smelting time of 8 hours, after the smelting, remove the slag, obtain thick bismuth, thin slag and sticky slag, and set aside; wherein, the added amount of the bismuth sulfide accounts for 15% of the mass percentage of the high-antimony bismuth-containing material, and the lime Addition accounted for high antimony bismuth material mass percentage is 5%, said soda ash addition accounts for high antimony bismuth material mass percentage is 10%, said iron filings addition accounts for high antimony bismuth material mass percentage is 2.5%; Melting After finishing, the slag is removed to obta...

Embodiment 3

[0054] (1) Reverberatory furnace reduction smelting process

[0055] The high-antimony bismuth-containing material mainly contains Sb and a small amount of Cu impurity elements. The high-antimony bismuth-containing material and bismuth sulfide are mixed evenly, and then added to the reverberatory furnace together with lime, soda ash, iron filings and coke powder for reduction smelting. 700°C and smelting time of 12 hours. After the smelting is over, remove the slag to obtain thick bismuth, thin slag and sticky slag for later use; wherein, the amount of bismuth sulfide added is 10% by mass of the high-antimony bismuth-containing material, and the lime The addition amount accounts for 3% of the mass percentage of high antimony and bismuth-containing material, the addition of said soda ash accounts for 5% of the mass percentage of high antimony and bismuth-containing material, and the addition of said iron filings accounts for 1% of the mass percentage of high antimony and bismuth...

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Abstract

The invention relates to a high-antimony bismuth-containing material treatment technology. The technology concretely comprises the following steps: 1, adding a certain amount of bismuth sulfide, limes, soda ash, iron filings and coke powder in the reduction smelting process of a high-antimony bismuth-containing material mainly containing Sb and a small amount of Cu impurity element in a reverberatory furnace, smelting at 500-700DEG C for 2-12h, and removing slag to obtain crude bismuth, lean slag and bonded slag; 2, dissolving the lean slag in a liquid alkali with the concentration of 20-60g/l, heating to 85DEG C, and reacting for 2-8h to make most antimony enter a liquid phase; and 3, adjusting the pH value of an alkaline solution obtained in step 2 to 4-7, heating to 40-85DEG C, reacting for 2-6h, and introducing air for oxidation to obtain crude sodium antimonite. Antimony and bismuth in the high-antimony bismuth-containing material can be directly separated in the smelting process of the reverberatory furnace through the high-antimony bismuth-containing material treatment technology, and the recovery rate of each of antimony and bismuth reaches above 95%.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal extraction metallurgy, in particular to a new process for separating bismuth and antimony from materials containing high antimony and bismuth, producing high-grade and low-impurity coarse bismuth, and providing high-quality raw material coarse bismuth for the refining process of a refined bismuth production line. Treatment process for high antimony and bismuth-containing materials. [0002] Background technique [0003] Traditional bismuth smelting mainly adopts the process of "rough smelting in reverberatory furnace-rough bismuth refining". First, bismuth-containing materials are roughly smelted in a reverberatory furnace to form bismuth-containing alloys, and then refined through processes such as "melting to remove copper and chloride to remove antimony" . During the smelting process in the reverberatory furnace, it is difficult to separate antimony from bismuth. There are a large ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B30/02
CPCY02P10/20
Inventor 杨兴文涂相林吴杰祝志兵倪明星邹志武钟志燕
Owner JIANGXI COPPER
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