Process for de-selenizing copper
阅读：445发布：2023-05-04
专利汇可以提供Process for de-selenizing copper专利检索，专利查询，专利分析的服务。并且Molten copper containing selenium is treated with an alkali metal sulfide, added as such or formed in situ by the addition of an alkali metal sulfate and a carbonaceous reducing agent, and a refining matte phase layer containing an alkali metal sulfide as refining agent is formed on the molten copper surface as a result of the treatment. The matte phase layer is retained on the molten copper surface for a period sufficient to enable passage of the selenium into the matte phase layer in amount sufficient to reduce the selenium content of the copper to a desired value. The selenium in the matte phase layer is thereafter separated from the molten copper, for instance by skimming off the matte phase layer.，下面是Process for de-selenizing copper专利的具体信息内容。
2. A process for the removal of selenium from molten copper, which comprises: a. treating the molten copper containing selenium with an alkali metal sulfide by adding the alkali metal sulfide per se to said molten copper; b. forming a refining sulfide matte phase layer containing a refining agent of which the alkali metal sulfide is the major refining constituent on the molten copper surface as a result of the alkali metal sulfide treatment; c. retaining the matte phase layer on the molten copper surface for a period sufficient to enable passage of a sufficient amount of selenium into the matte phase layer to reduce the selenium content of the copper to a desired value; and d. separating the selenium in the matte phase layer from the molten copper.
3. The process of claim 2 wherein the alkali metal sulfide is a substantially anhydrous alkali metal sulfide.
4. The process of claim 2 wherein the selenium in the matte phase layer is separated from the molten copper by skimming the matte phase layer.
5. The process of claim 2 wherein the thus-obtained de-selenized molten copper is subjected to blowing, and subsequently the molten copper is poled.
6. The process of claim 2 wherein the selenium-containing molten copper treated is blister copper.
7. The process of claim 2 wherein the selenium-containing molten copper beneath the molten copper surface is agitated to bring the selenium-containing molten copper in intimate contact with the refining matte phase.
8. The process of claim 7 wherein the agitating is carried out by means of an agitating gas injected beneath the molten copper surface.
9. The process of claim 8 wherein the agitating gas is injected beneath the molten copper surface through the tuyeres of a tuyere-equipped furnace.
10. The process of claim 8 wherein the agitating gas is a reducing gas.
11. The process of claim 8 wherein the agitating gas is natural gas.
12. A process for the removal of selenium from molten copper, which comprises: a. treating the selenium-containing molten copper with an alkali metal sulfate and a carbonaceous reducing agent, the alkali metal sulfate endothermically reacting with the carbonaceous reducing agent in situ to form an alkali metal sulfide; b. forming a thick, foamy, readily separable refining matte phase layer containing the alkali metal sulfide as refining agent on the molten copper surface due to the reaction of the alkali metal sulfate and the carbonaceous reducing agent; c. retaining the refining matte phase layer on the molten copper surface for a period sufficient to enable passage of the selenium into said matte phase layer but insufficient to yield a thin, non-foamy, difficultly-separable matte phase layer on the molten copper surface; and d. separating the readily separable matte phase layer containing the selenium from the molten copper.
13. The process of claim 12 wherein the refining matte phase layer is retained on the molten copper surface for a period of at least about 30 minutes but insufficient to yield a thin, non-foamy, difficultly separable matte phase layer on the molten copper surface.
14. The process of claim 13 wherein the matte phase layer is retained on the molten copper surface for a period in the range of about 30-60 minutes.
15. The process of claim 13 wherein the selenium-containg matte phase layer is of a thickness in the range from about two to about three inches at the time of separation from the molten copper.
16. The process of claim 12 wherein the selenium-containing molten copper treated is blister copper.
17. The process of claim 12 wherein the selenium-containing molten copper beneath the molten copper surface is agitated to bring the selenium-containing molten copper in intimate contact with the refining matte phase.
18. The process of claim 17 wherein the agitating is carried out by means of an agitating gas injected Beneath the molten copper surface.
19. The process of claim 18 wherein the agitating gas is injected beneath the molten copper surface through the tuyeres of a tuyere-equipped furnace.
20. The process of claim 19 wherein the agitating gas is a reducing gas.
21. The process of claim 20 wherein the agitating gas is natural gas.
22. The process of claim 12 wherein the thus-obtained de-selenized molten copper is subjected to blowing, and subsequently the molten copper is poled.
23. The process of claim 12 wherein the temperature of the molten copper is maintained sufficiently elevated to prevent solidification of the copper due to cooling thereof by reason of the endothermic reaction of the alkali metal sulfate and carbonaceous reducing agent.
24. The process of claim 23 wherein the selenium-containing molten copper treated is blister copper.
25. The process of claim 23 wherein the temperature of the molten copper is maintained sufficiently elevated to prevent the cooling solidification of the copper by introducing sufficient superheat into the molten copper prior to adding the alkali metal sulfate and carbonaceous reducing agent thereto.
26. The process of claim 23 wherein the temperature of the molten copper is maintained above 1115*C.
27. The process of claim 26 wherein the molten copper temperature is maintained above 1115*C. by treating the selenium-containing molten copper with the substantially maximum quantity of the alkali metal sulfate and solid carbonaceous reducing agent that will not result in cooling the copper below 1115*C.
28. The process of claim 27 wherein the alkali metal sulfate is sodium sulfate and the carbonaceous reducing agent is coke.
29. The process of claim 23 wherein the selenium-containing molten copper beneath the molten metal surface is agitated to bring the selenium-containing molten copper in intimate contact with the refining matte phase.
30. The process of claim 29 wherein the agitating is effected by means of an agitating gas injected beneath the molten copper surface.
31. The process of claim 27 wherein after separating the refining matte phase layer containing the selenium from the copper, the molten copper at a temperature of above 1115*C. is treated with another addition of the alkali metal sulfate and carbonaceous fuel reducing agent, followed by the retention of the refining matte phase layer on the molten copper for a period sufficient to enable passage of the selenium into the refining matte phase layer but insufficient to yield a thin, non-foamy, difficulty separable matte phase layer on the molten copper surface, and separation of the readily separable matte phase layer from the molten copper.
32. The process of claim 31 wherein the procedure is repeated a desired number of times.
33. The process of claim 23 wherein the thus-obtained de-selenized molten copper is subjected to blowing, and subsequently the molten copper is poled.
34. The process of claim 31 wherein the selenium-containing molten copper beneath the molten metal surface is agitated to bring the selenium-containing molten copper in intimate contact with the refining matte phase.
35. The process of claim 32 wherein the selenium-containing molten copper beneath the molten metal surface is agitated to bring the selenium-containing molten copper in intimate contact with the refining matte phase.
| 标题 | 发布/更新时间 | 阅读量 |
|---|---|---|
| 一种改善皮革箱包易开裂的加工工艺 | 2020-05-08 | 720 |
| PVC木塑发泡抗菌板及其制备方法 | 2020-05-08 | 885 |
| 一种应用在板式家具免漆贴面纸表面的水性凹版印刷抗刮耐磨罩光油及其制备方法 | 2020-05-08 | 491 |
| 具有紫外(UV)可固化表面涂层的表面覆盖物 | 2020-05-12 | 431 |
| 一种聚酯HOY纤维及其制备方法 | 2020-05-11 | 759 |
| 一种抗菌氨纶的制备方法 | 2020-05-08 | 466 |
| 一种可视角度变色木地板的油漆工艺 | 2020-05-11 | 572 |
| 一种耐候低光粉末涂料 | 2020-05-11 | 362 |
| 全消光面料的染色工艺 | 2020-05-08 | 557 |
| 蓄电装置用外包装材料、蓄电装置用外包装壳体及蓄电装置 | 2020-05-11 | 231 |
高效检索全球专利专利汇是专利免费检索,专利查询,专利分析-国家发明专利查询检索分析平台，是提供专利分析，专利查询，专利检索等数据服务功能的知识产权数据服务商。
我们的产品包含105个国家的1.26亿组数据，免费查、免费专利分析。
分析报告
专利汇分析报告产品可以对行业情报数据进行梳理分析，涉及维度包括行业专利基本状况分析、地域分析、技术分析、发明人分析、申请人分析、专利权人分析、失效分析、核心专利分析、法律分析、研发重点分析、企业专利处境分析、技术处境分析、专利寿命分析、企业定位分析、引证分析等超过60个分析角度，系统通过AI智能系统对图表进行解读，只需1分钟，一键生成行业专利分析报告。
QQ群二维码
意见反馈
意见反馈