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| 含铂族金属硅铁合金熔炼脱硅预处理工艺研究 |
| Study on the pretreatment process of smelting desiliconization of Si-Fe alloy containing platinum group metals |
| 投稿时间：2020-10-12 |
| DOI： |
| 中文关键词: 铂族金属 硅铁合金 熔炼 预处理 |
| 英文关键词: platinum group metals Si-Fe alloy smelting pretreatment |
| 基金项目:云南省科技人才和平台计划项目(2018HB112)；云南省重大科技专项(2018ZE001)；固废资源化专项(2019YFC1907505) |
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| 中文摘要: |
| 失效汽车尾气催化剂经等离子熔炼后得到富集了铂族金属的硅铁合金，其硅含量高，难以酸溶除铁。采用熔炼法对其进行脱硅预处理研究，得到最优条件为:氧化剂Fe2O3用量为理论用量的1.4倍、造渣剂CaO用量为原料量的20%，经1600℃熔炼120 min，物料中硅的去除率达到95%，物料中硅含量由10%降低至0.5%。经过脱硅预处理后物料主体为单质铁，易于酸溶除铁，有利于精炼回收铂族金属。 |
| 英文摘要: |
| Spent automobile exhaust catalysts were smelted by a plasma smelting method to obtain ferrosilicon alloys which enrich with platinum group metals. It is difficult to remove iron inSi-Fe alloys by an acid dissolution method due to their high silicon content. The Si-Fe alloys were studied by a desiliconization pretreatment smelting method. The optimum conditions are as follows: the dosage of oxidant Fe2O3 is 1.4 times of the theoretical dosage, and the dosage of slagging agent CaO is 20% of the raw material, and smelting at 1600℃ for 120 min. Under the optimal conditions, the removal rate of silicon in the material reached 95%, and the silicon content in the material was reduced to 0.5% from 10%. And the principal component was elemental iron which is easy to dissolve and refine. |
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