2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 1: D'Abreu Intl. Symp. / Iron and Steel Making
| Editors: | Kongoli F, Noldin JH, Takano C, Lins F, Gomez Marroquin MC, Contrucci M |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 320 pages |
| ISBN: | 978-1-987820-37-9 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Experimental Study on the Dephosphorization Capacity of Heterogeneous Fluxes
Xuegong BI1;1WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY, Wuhan, China;
Type of Paper: Regular
Id Paper: 46
Topic: 2
Abstract:
The progressive exhaustion and rising prices of high-quality iron ore resources compel people to use in large quantities iron ores with high phosphorus contents and it is better to deliver high phosphorus hot metal to the steelmaking converter after has been pretreated for removing phosphorus. It is urgent to solve a series of techno-economical difficult problems for the dephosphorization pretreatment technology of high phosphorus hot metal, and their solutions can be summed up as the attainment of pretreatment fluxes with high dephosphorization capacity, of small consumption, being environmentally friendly and convenient for recovery and reuse through optimizing the design of dephosphorization flux contents. In this paper, the phosphorus distribution ratio between carbon-saturated hot metal and a kind of heterogeneous dephosphorization flux were measured by accepting the indirect method and several microcosmic measuring techniques were applied to the study of the presence forms of phosphorus in the heterogeneous fluxes. The results demonstrated that, for the dephosphorization of high phosphorus hot metal, the increase of solid to liquid ratio and a control of lower FeO content in the liquid slag are beneficial to the increase of phosphorus distribution ratios; the phosphorus contents in liquid slag are extremely low and it mainly presents in the solid solutions, the maximum P content in the solid solutions is 14.23 pct, and there are two kinds of phosphorus-containing phases, i.e. Ca15(PO4)2(SiO4)6 (low phosphorus phase) and Ca5(PO4)2SiO4 (high phosphorus phase), and the P content phase content is higher at a lower solid to liquid ratio.