Foamed dephosphorization pellet and preparation method thereof

Abstract

The invention provides a foamed dephosphorization pellet and a preparation method thereof. The pellet consists of the following components: 15 to 40 percent of calcium oxide (CaO), 15 to 40 percent of carbon (C), 20 to 30 percent of ferric oxide (Fe2O3), 1 to 3 percent of sodium oxide (Na2O) and 20 to 40 percent of caustic soda. The preparation method for the pellet comprises the following steps of: preparing limestone, low-sulfur coal powder, iron oxide red and soda ash according to the component content of the foamed dephosphorization pellet, mixing the materials uniformly by using a mixer, then adding a little amount of adhesive into the mixture, and pelleting the mixture by using a disc pelleting machine. The dephosphorization pellet of the invention does not produce pollution to the environment, so the pellet is favorable for environmental protection; the pellet has good dephosphorization effect and is favorable for improving the quality of the steel; and the pellet has little corrosion to a furnace lining, can reduce the using amount of lime fed into the furnace so as to simplify the operation in front of the furnace, and has obvious comprehensive economic benefit.

Description

technical field [0001] The invention belongs to the technical field of steelmaking, and in particular relates to a foaming dephosphorization pellet for electric furnace steelmaking such as an electric arc furnace, an LF furnace and an intermediate frequency induction furnace and a preparation method thereof. Background technique [0002] Modern electric furnaces use lime to solve the problem of dephosphorization. Due to the unstable quality of lime, especially the low activity of lime and low effective utilization rate, the consumption of lime in electric furnace smelting in actual production is as high as 100-150kg per ton of steel. The increase in the amount of slag leads to problems such as large consumption of steel materials, high power consumption, and long smelting time. Due to the need for slag making and slag adjustment in the smelting process, adding iron ore, fluorite, carbon powder, etc. from the feeding port of the electric furnace also makes the on-site operati...

AI Technical Summary

Problems solved by technology

The dephosphorization pellets have low melting point, fast melting speed and high activity CaO in slag, but the dephosphorization pellets do not have foaming components, so they cannot form foamy slag, and cannot be used as dephosphorization agent for electric arc furnace dephosphorization Slagging