Heating slag melting agent for smelting low-silicon liquid iron and preparation method of the heating slag melting agent

The invention relates to a heating slag melting agent for smelting low-silicon liquid iron and simultaneously relates to a preparation method of the heating slag melting agent, belonging to the technical field of metallurgy. The heating slag melting agent consists of the chemical ingredients in mass percent as follows: 41-46% of SiC, 5-10% of FeSi, 35-40% of FeO plus Fe2O3, 0-6% of CaO, 0-3% of MgO and 5-10% of CaC2. The preparation method includes the steps of smelting quartz sand and coke into silicon carbide, grinding and mixing materials, and stirring to uniform for formation. In the invention, the characteristic of low melting point of calcium carbide is utilized for assisting silicon carbide and iron silicide in reacting with oxidized iron sheets to emit a large quantity of heat, and simultaneously with good heat conducting property, the silicon carbide rapidly transmit the generated heat during the smelting process, therefore, the slag melting speed is accelerated and the flowability of the liquid iron