Slagging constituent for semisteel converter steelmaking and manufacturing method thereof

Abstract

The invention discloses a slagging constituent for semisteel converter steelmaking and a preparation method thereof, wherein the slagging constituent for semisteel converter steelmaking comprises the following compounds in percentage by weight: 45-55% of SiO2, 2-8% of CaO, 5-15% of Al2O3, 2-8% of MnO, 5-15% of MgO, 5-10% of FeO and 10-20% of Fe2O3; the manufacturing method thereof comprises the following steps: scattering quartz sand, manganese ore, corundum slag and converter sludge and grinding till the granularity is below 1mm; and mixing with a bonding agent to obtain a mixture, wherein the mixture is pressed for palletizing and then baked for manufacturing the slagging constituent. The slagging constituent disclosed by the invention has the advantages of being quick in slagging speed, relatively low to control converter gun position integrally, easier to control in sladding process, low in melting point of converter final slag, relatively low for TFe in the slag, high in dephosphorization efficiency, and the like; the efficient production of semisteel converter steelmaking can be ensured; the solid waste of corundum slag is further utilized so that the corundum slag becomes a secondary resource for steelmaking and the cyclic utilization of waste resource is realized; therefore, the slagging constituent for semisteel converter steelmaking and the manufacturing method thereof have better economic value and social value.

Description

technical field [0001] The invention belongs to the technical field of converter semi-steel making, and more specifically relates to a slagging agent for semi-steel converter steelmaking using corundum slag and a manufacturing method thereof. Background technique [0002] Converter smelting of semi-steel Since the content of acidic materials Si and Mn in semi-steel is very small, converter steelmaking is more difficult than ordinary molten iron steelmaking. On the high side, the early slagging time is late, the process smelting slag dries up and the physical and chemical properties of the final steel slag are poor; ② There are many types of slagging auxiliary materials, and there is a lack of sufficient high-level silos to meet production optimization requirements. Therefore, it is necessary to develop a new type of slagging agent to ensure the smooth progress of steelmaking production. [0003] The currently commonly used slagging agent mainly adopts a compound slagging ag...

AI Technical Summary

Problems solved by technology

[0003] The currently commonly used slagging agent mainly adopts a compound slagging agent for semi-steel steelmaking mentioned in the Chinese patent application whose publication date is December 29, 2010 and whose publication number is CN101928806A, but in fact this Due to the small number of slag components, this kind of slagging agent has the problems of difficulty in slag melting, slow slag incoming speed, and high TFe content in the final slag during actual use.