Si-Al-Ca alloy deoxidizing agent for steel making

Abstract

A Si-Al-Ca alloy deoxidizing agent for steel making can effectively solve the problems that the cost of pure aluminum de-oxidation in steel making is high, nozzle clogging takes place, and labor strength of cleaning is high. The Si-Al-Ca alloy deoxidizing agent comprises, by weight, the metal raw materials including 25-35 kg of silicon iron, 35-45 kg of aluminum metal, 10-20 kg of calcium metal and 10-20 kg of steel blocks. The preparation method for the alloy deoxidizing agent comprises the following steps: crushing silicon iron into blocks of 20-40 cm, crushing aluminum metal powder into particles, crushing the calcium metal into blocks, mixing the blocks and the particles with the steel blocks, preheating an electric furnace to over 800 DEG C, delivering a mixture of the four metals into the electric furnace for smelting, pouring the mixture in the electric furnace into a tundish when the mixture is melted completely and the temperature reaches 1000-1500 DEG C, conducting pouring sizing in an ingot mold, and carrying out packaging and warehouse storage after the product passes detection. The raw materials are abundant, composition is scientific and rational, the preparation method is simple, production is easy, cost is low, use effects are good, adverse factors caused by nozzle clogging can be effectively prevented, labor strength is relieved, production efficiency is increased, steel making conditions are improved, the cost of steel making is saved, and economic and social benefits are huge.

Description

Technical field [0001] The invention relates to the field of steelmaking, in particular to a silicon-aluminum-calcium alloy deoxidizer for steelmaking. Background technique [0002] As we all know, deoxidation is necessary in steelmaking. Deoxidation is generally to add deoxidizers in steelmaking. There are many deoxidizers used in steelmaking. Among them, it is generally believed that pure aluminum has the best deoxidation effect. However, there is an inevitable The defect (disadvantage) is the use of pure aluminum for deoxidation. In the process of steelmaking and tapping, aluminum and oxygen combine to produce aluminum oxide (Al2O3) at the nozzle, which affects normal casting. In order to prevent aluminum oxide from being in the nozzle Nodules require investment of manpower and material resources for processing, and the labor intensity is high. This not only delays the normal production of steelmaking, but also increases the cost of steelmaking. Moreover, the price of pure alu...

AI Technical Summary

Problems solved by technology

[0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a silicon-aluminum-calcium alloy deoxidizer for steelmaking, which can effectively solve the high cost of deoxidation of pure aluminum in steelmaking, nodules at the nozzle, and labor intensity for cleaning. big problem