Freon-free slagging agent for rotating furnace

Abstract

The invention discloses a freon-free slagging agent for a rotating furnace, mainly comprising the following materials in parts by weight: 5-30 parts of manganese (Mn), 0-20 parts of silicon dioxide (SiO2) and 10-50 parts of total iron (TFe). The freon-free slagging agent is prepared into 5-50mm particles and the adding amount thereof is determined according to the silicon content in molten iron and is controlled to be within 5-7kg / t steel. The freon-free slagging agent has the advantages of prolonging the service life of a rotating furnace body, reducing the wastage rate of fettling material, accelerating the joint concentration of steelmaking of the rotating furnace, and reducing the time of daily maintenance and overhauling. Under the condition that the materials and the status of equipment are not changed, after the rotating furnace is added with the freon-free slagging agent, the technical indexes are all improved with different degrees, also the blowing is stable, the slagging is good, the phenomenon that the slag is re-dried is avoided, the operating conditions of steelmaking of the rotating furnace are improved, certain main consumption indexes of the rotating furnace take on downward trend, and the effects of dephosphorization and desulfurization are superior to that of other slagging agents.

Description

technical field [0001] The invention relates to a converter slag-forming flux specially used for the steelmaking industry, in particular to a fluoride-free slag agent for a converter. Background technique [0002] In the traditional steelmaking process at home and abroad, fluorite is used as the main flux for converter steelmaking slag, and its main component is calcium fluoride (CaF 2 ). Due to its low melting point, it can make CaO and 2CaO·SiO which hinder the melting of lime 2 The melting point of the shell is significantly lowered, and the action is rapid, so it can accelerate the melting of lime and improve the fluidity of slag. However, the use of fluorite as a converter slag agent has certain limitations: on the one hand, the fluorine in fluorite will seriously erode the lining of the converter, resulting in reduced converter life, air pollution, and increased consumption of steel materials; on the other hand, in recent years Affected by the shortage of fluorspar ...

AI Technical Summary

Problems solved by technology

However, the use of fluorite as a converter slag agent has certain limitations: on the one hand, the fluorine in fluorite will seriously corrode the lining of the converter, resulting in reduced converter life, polluted air, and increased consumption of steel materials; on the other hand, in recent years Affected by the shortage of fluorspar resources, the price of fluorspar fluctuates greatly, which greatly increases the production cost of steelmaking enterprises

However, due to the rising price of aluminum iron ore and the defects in use, people in the industry are still working hard to find other slagging agents with better performance