High Level Material Ferro Silicon 70

Combined with the chemical composition of low ferrosilicon 70 tailings, the mass ratio of this kind of ceramsite raw materials is determined to be 70% iron tailings, 20% bentonite and 10% bauxite. The optimal sintering system of low ferrosilicon tailings ceramsite is as follows: preheating temperature 400°C, preheating time 20 min, sintering temperature 1140°C, sintering time 15 min.Under the condition of this process, the bulk density of low ferrosilicon tailings ceramsite is 705 kg·m-3, the apparent density is 1612 kg·m-3, the water absorption rate is 9.67%, and the cylinder compressive strength is 6.81 MPa, which meets the requirements of national specifications.

1.A kind of titanium-ferrosilicon 70 alloy with high titanium and low silicon, and its preparation method, belongs to the field of comprehensive utilization of vanadium and titanium resources and ferroalloy smelting technology. The titanium ferrosilicon alloy has the characteristics of titanium content higher than 40wt%, containing 40~70% Ti, 8~40% Si, 3~15% Fe and unavoidable impurities according to the weight ratio. The preparation method of the titanium-ferrosilicon alloy is to add an admixture to the high-titanium blast furnace slag for molten thermal reduction reaction to prepare a titanium-ferrosilicon alloy with high titanium and low silicon. The weight ratio of high-titanium blast furnace slag and admixture is as follows: blast furnace slag: admixture = 1: 0.4~0.8; Described admixture comprises 40~80% reducing agent by weight ratio; The main component of the reducing agent is metal aluminum. Titanium-ferrosilicon alloy can replace titanium-iron as a titanium alloy agent, which can promote the popularization and application of titanium-ferro-silicon alloy, and the method is conducive to improving the environment and improving resource utilization.

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