Ramping material for intermediate frequency induction furnace and preparation method thereof

Abstract

The invention relates to ramming mass for a medium-frequency induction furnace and a preparing method thereof. According to the technical scheme, 58-74 wt% of fused corundum, 6-18 wt% of tabular corundum, 8-16 wt% of fused magnesite, 2-9 wt% of alpha-Al2O3 micro powder, 1-3 wt% of aluminum lactate and 1-6 wt% of magnesium lactate are used as raw materials and mixed uniformly to obtain the ramming mass for the medium-frequency induction furnace, wherein the particle size of aluminum lactate and magnesium lactate is smaller than 0.18 mm, the particle size of fused corundum is 0.088-5 mm, and the content of Al2O3 of the fused corundum is 94-99.5 wt%; the particle size of tabular corundum is 0.044-1 mm, the particle size of the fused magnesite is 0.044-1 mm, and the content of MgO of fused magnesite is larger than or equal to 95 wt%; the raw materials are mixed in a mixer for 10-25 min. The preparing method has the advantages of being simple in process and environmentally friendly. The prepared ramming mass for the medium-frequency induction furnace is high in refractoriness, erosion resistance and scouring resistance and long in service life.

Description

technical field [0001] The invention belongs to the technical field of refractory materials for intermediate frequency induction furnaces. In particular, it relates to a ramming material for an intermediate frequency induction furnace and a preparation method thereof. Background technique [0002] The use of intermediate frequency induction furnace is becoming more and more popular, and it has become one of the main production equipment for stainless steel smelting, casting and special alloy smelting. The performance of the lining material directly determines the efficiency of the induction furnace. [0003] The ramming material requires a sintering reaction under medium and high temperature conditions to form a hard sintered dense layer. At present, sintering agents are generally introduced into ramming materials. The sintering agents promote the sintering of ramming materials and at the same time form a liquid phase, which reduces the erosion resistance of the ramming ma...

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Problems solved by technology

Another document (Hu Yaosheng et al. The effect of magnesia addition on the properties of corundum ramming material. Refractories. 2013, 47 (4), 271~273) introduced brown corundum and fused magnesia as the main raw materials, adding boric acid Prepare ramming material with high-temperature binder, boric acid forms a liquid phase at high temperature, reducing the high-temperature performance of ramming material