The invention discloses a
slag high-heat-strength blast-furnace
magnesium filler which is prepared from the following raw materials in percentage by
mass: 70-90% of light-burned
magnesium powder, 1-8% of binding agent, 5-12% of aggregate and 2-11% of water. The
slag high-heat-strength blast-furnace
magnesium filler comprises the following components in percentage by
mass: 60-75% of MgO, 4-14% of SiO2, 2-6% of CaO, 2-8% of H2O, and 12-17% of binding agent and other components. The raw materials are pressed into oblate spheroids under the
mechanical force of a briquetting
machine; and the physical dimension of the
oblate spheroid magnesium filler is 35-65mm, and the compression strength at
room temperature is 1500-3500N. The magnesium filler has the advantages of small volume and high compression strength, is convenient for addition, does not increase the
thermal energy consumption of the blast-furnace
smelting, improves the comprehensive metallurgical properties of furnace
slag, relieves the wind resistance of the
blast furnace, promotes the yield increase, consumption reduction and effect enhancement of the
blast furnace, and enhances the economic benefit of the
blast furnace.