A new environmentally friendly synthetic slagging material

Abstract

The invention provides a novel environment-friendly synthetic slag forming material which comprises the following raw material components in parts by weight: 11-14 parts of CaO, 5-25 parts of aluminum ash powder, 70-73 parts of SiO2, 1-2 parts of MnO, 8-10 parts of FeO and 2-5 parts of Y2O3. The novel environmental-friendly synthetic slag forming material is environment-friendly, superior in slag forming performance, and wide in raw material sources, belongs to a resource recycling material, is low in pollution on molten steel during the steel-making using process, and small in generated slag quantity, can remarkably improve the comprehensive performance of a steel-making slag system, and improves the quality of molten steel. The novel environment-friendly synthetic slag forming material, namely a slag former, belongs to comprehensive utilization of industrial wastes, and is reliable in process, low in cost, and profitable.

Description

technical field [0001] The invention belongs to the fields of LF / VOD / VD steelmaking and refining, and particularly relates to a novel environment-friendly synthetic slagging material. Background technique [0002] Slagging is an essential part of the steelmaking and ironmaking process. Steelmaking and ironmaking need to reduce the impurities in the steel. These impurities are separated and enter the slag. Because the slag has a light specific gravity and floats on the molten steel, it is easier to remove. In addition, the slag can also protect the molten steel from direct contact with the atmosphere. Slagging is the addition of steelmaking substances called slagging agents, such as calcium fluoride or calcium oxide, during the steelmaking process to form slag. [0003] Under the conditions of the existing steelmaking process, materials such as lime (calcium oxide) and fluorite (calcium fluoride) are mainly used for slagging. In traditional slag-making materials, the lime ...

AI Technical Summary

Problems solved by technology

The disadvantage is that the content of MnO is too high, while the content of FeO most needed for CaO and MgO melting is too low, resulting in slow slagging speed and high cost, which does not meet the conditions required for rapid slagging in the early stage of the converter

Also in the article "Application of Depleted Manganese Ore in Converter Steelmaking Process" in "Steelmaking", Volume 20, No. 2, February 2004, only MnO of depleted manganese ore was used, which increased the Mn content at the end of steelmaking, but did not completely Solve the problem of insufficient slag removal capacity in the early stage of converter

Images