Improved pyrorefining process

A technology for copper refining and refining slag, applied in the direction of process efficiency improvement, welding medium, welding/cutting medium/material, etc., can solve the problems of reducing copper recovery rate, low solder output, occupying furnace volume, etc., and achieves widening acceptance standards Effect

Active Publication Date: 2020-08-21
METALLO BELGIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, in US 3,682,623, the solder yield per round is rather low relative to the amount of copper processed, and there is also a relatively large amount of ineffective slag diluent material that must pass through the slag reprocessing furnace, which takes up furnace volume, reducing the Copper recovery in the selective copper reduction step, resulting in additional losses of copper in the solder product, which means a burden for its downstream processing into higher purity lead and tin metal products

Method used

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  • Improved pyrorefining process
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Examples

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Embodiment approach

[0248] In an embodiment, the method according to the invention further comprises the step of: cooling the first coarse solder metal composition and / or the second coarse solder metal composition and / or the pre-refined solder metal composition to a temperature of at most 825°C, to produce a bath containing a first upper layer of dross that floats under the force of gravity above the first liquid melt conditioned solder phase. Applicants discovered that this further downstream processing step was able to remove significant amounts of copper and other unwanted metals from the raw solder. More details of this step can be found in WO 2018 / 060202 A1. Applicants have further discovered that this cooling step, in combination with some other downstream processing steps of the lead / tin stream, can at least partially replace the pretreatment with silicon metal mentioned elsewhere herein. This is advantageous because metallic silicon is a relatively rare process chemical, and it would be ...

Embodiment

[0271] The following examples illustrate preferred embodiments of the invention. This example is in figure 1 is further shown, where figure 1 A flowchart showing the core parts of the method according to the invention. In this process, starting with a black copper composition 1, a refined anodic grade copper product 9, a high copper metal composition by-product 22, two crude solder metal composition products 18 and 26 and three Kinds of waste residues 12, 20 and 28 etc.

[0272] exist figure 1 In , numbers indicate the following claimed features:

[0273] 1. to the black copper composition feeding of step b) (100)

[0274] 2. Fresh feed to step b) (100)

[0275] 3. The first copper refining slag

[0276] 4. The first copper-enriched metallic phase

[0277] 5. Fresh feed to step h) (200)

[0278] 6. Second copper refining slag

[0279] 7. Second copper-rich metal phase

[0280] 8. The third copper refining slag

[0281] 9. The third copper-rich metal phase - anodic ...

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PUM

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Abstract

Disclosed is a process for producing at least one concentrated copper product together with at least one crude solder product, starting from a black copper composition comprising at least 50% of copper together with at least 1.0%wt of tin and at least 1.0%wt of lead, the process comprising the step of partially oxidizing the black copper thereby forming a first copper refining slag, followed by partially reducing the first copper refining slag to form a first lead-tin based metal composition and a first spent slag, whereby the total feed to the reducing step comprises an amount of copper thatis at least 1.5 times as high as the sum of the amounts of Sn plus Pb present, and whereby the first spent slag comprises at most 20%wt total of copper, tin and lead together.

Description

technical field [0001] The present invention relates to the production of non-ferrous metals, in particular copper (Cu), by pyrometallurgy. More specifically, the present invention relates to an improved process for the co-production of copper and solder streams from primary and secondary feedstocks as primary products for further upgrading to commercially desirable purity metal products. Solder streams are typically metal compositions or families of alloys that contain significant amounts of tin (Sn), but often not necessarily lead (Pb) at the same time. Background technique [0002] Non-ferrous metals can be produced from newly mined ore (also called primary source) or recycled material (also called secondary raw material) or a combination thereof as starting material. Recyclable materials may be, for example, by-products, waste materials, and end-of-life materials. The recovery of non-ferrous metals from secondary raw materials has become a vital activity over the years...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04
CPCC22B7/04C22B5/02C22B13/025C22B15/0054C22B15/0056C22B25/02C22C1/06Y02P10/20B23K35/268C22C9/00C22C11/06C22C3/005
Inventor 伯特·克莱蒂让·迪尔克·A·戈里斯伊夫·德维斯切查尔斯·格南沃尔特·冈斯尼可·莫伦史蒂文·斯迈特斯安迪·布莱尤格尔曼斯
Owner METALLO BELGIUM
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