Low-phosphorous silicon iron product and smelting method thereof

Abstract

The invention provides a low-phosphorous silicon iron product. Chemical components of the low-phosphorous silicon iron product include, by weight percent, 75% or larger of Si, 0.1% or less of Al, 0.1%or less of Ca, 0.015% or less of C, 0.1% or less of Mn, 0.1% or less of Cr, 0.02% or less of P, 0.01% or less of S, 0.05% or less of Ti, 0.4% or less of Ni, 0.1% or less of Cu, 0.05% or less of V andthe balance Fe and impurities. According to the low-phosphorous silicon iron product and a smelting method thereof, refined silica, semi-coke and silicon steel sheets are adopted to smelting production, the refined materials are mixed according to a specific proportion to achieve the purpose of reducing the content of microelements in the product, the problem that the phosphorus content in existing silicon iron is relatively high is solved, and the low-phosphorus silicon iron product with 0.02 wt% or less of P can be stably produced to meet the production requirement.

Description

Technical field [0001] The invention relates to the technical field of ferrosilicon smelting, in particular to a low-phosphorus ferrosilicon product and a smelting method thereof. Background technique [0002] With the technological progress of the iron and steel industry and the adjustment of product structure in recent years, the requirements for trace elements in ferrosilicon (such as Ti, P, C, Al, Ca, etc.) have become stricter and stricter. What is the content of trace elements in ferrosilicon? Determines the quality of ferrosilicon. [0003] Phosphorus and pure ferrite form an unstable solid solution, which has the disadvantage of increasing the grains of pure ferrite. Phosphorus can increase the strength of steel, but it will greatly reduce the plasticity and toughness of steel. At present, the content of phosphorus on the market is generally not More than 0.05wt%, the current production of ferrosilicon includes low-phosphorus high-purity ferrosilicon. Due to resource, cost...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a low-phosphorus ferrosilicon product and its smelting method, using selected furnace materials for smelting and production, to achieve the purpose of reducing the content of trace elements in the product, and to solve the defect of high phosphorus content in existing ferrosilicon. It can stably produce low-phosphorus ferrosilicon products with P≤0.02wt% to meet production needs

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