Calcium deoxidizer with calcium silicide as main component and preparation method thereof

Abstract

The invention discloses a calcium deoxidizer with calcium silicide as the main component. The calcium deoxidizer is characterized by being prepared from the following raw materials by weight part: 33-38 of calcium silicide, 10-12 of calcareous shale, 14-18 of silicon carbide, 3-4.5 of polyvinylpyrrolidone, 2-3 of silica sand, 42-50 of 10% acetic acid, and 3-4 of carbon fiber. The calcium deoxidizer provided by the invention has reasonable composition proportion, the process is special and is convenient for industrial control, calcium silicide, silicon carbide, silica sand and the like are prepared into particles, the particles are then sintered into porous particles, thus being conducive to forming negative pressure, fully reacting with oxygen in molten steel, and improving the deoxidization efficiency. Specifically, the silica sand is crushed into small particle powder to improve dispersibility in molten steel, thereby enhancing molten steel fluidity, effectively removing inclusions in steel, improving molten steel purity, and preventing tundish nozzle clogging.

Description

technical field [0001] The invention relates to the technical field of deoxidizers for steelmaking, in particular to a calcium-based deoxidizer mainly composed of calcium silicide and a preparation method thereof. Background technique [0002] With economic development and scientific and technological progress, the demand for steel is increasing in industry and daily life, and the requirements for steel quality are also getting higher and higher. Therefore, in addition to increasing the improvement of steelmaking equipment and the innovation of production technology, it is also very important to strengthen the research and development of deoxidized alloys for steelmaking materials. The quality and performance of the final steel are directly affected by the level of oxygen content in the steel. High oxygen content will cause the carbon and oxygen to oxidize again during the condensation process of molten steel, which will cause bubbles in the steel and affect the quality of ...

AI Technical Summary

Problems solved by technology

This deoxidation and alloying method is affected by the end point C of molten steel, the tapping temperature and the amount of slag, resulting in large fluctuations in the composition of Mn in the steel and unstable recovery rates of alloying elements.

And when the amount of deoxidizer added is too large, the acid-soluble aluminum in molten steel exceeds a certain level, which will lead to the formation of solid Al 2 o 3 Clustered inclusions, the viscosity of molten steel increases, the inclusions increase and are not easy to float up and get rid of, eventually leading to nodules at the tundish nozzle