Composite refining agent for metallurgy and processing technique thereof

Abstract

The invention relates to a composite refining agent for metallurgy and a processing technique thereof. The refining agent is characterized in that the refining agent comprises the following raw materials by weight percent: 25-38% of CaSi, 3-10% of SiC, 15-40% of CaF2, 5-15% of CaO, 1-5% of rare earth, 10-30% of metal manganese powder, 5-10% of calcium carbide and 2-8% of binder, wherein the binder is formed by natural calcium bentonite, sodium carbonate and cellulose sodium; and the composite refining agent is prepared through grinding, mixing, sieving and drying according to the formula of the components. The composite refining agent has the advantages of short smelting cycle, few product impurities, good molten steel purifying effect, high product quality and low energy consumption.

Description

technical field [0001] The invention relates to an additive for metallurgy, in particular to a compound refining agent for metallurgy and its processing technology. Background technique [0002] Modern electric furnaces generally transfer the task of the reduction period of the electric furnace to the refining furnace outside the furnace to complete. For these electric furnaces, the entire smelting process only has the melting period and the oxidation period. During the oxidation period of electric furnace smelting, the requirement for oxidizability of slag is "high at the front and low at the end". That is to say, in the early stage, there must be enough (Fe0) content to melt the slag, which is beneficial to dephosphorization, temperature rise and adsorption of gases and inclusions; and in the later stage, the (Fe0) content must be greatly reduced, which is not only beneficial to reduce the Consumption, improve the yield of molten steel, and beneficial to the slag for s...

AI Technical Summary

Problems solved by technology

There are three major problems in the practice of some factories: 1. If the deoxidation ability can meet the requirements, the Mg0 content is too low (only 8% to 10%), and the ability of slag to stick and hang slag to protect the furnace is weak: 2. The Mg0 content can meet the slag content. If it is required for sticking and hanging slag to protect the furnace, the deoxidation ability is relatively weak, and the CFeO reduction rate is 18%; 3. If the foaming ability is strong, the deoxidation ability and slag adjustment ability are too low