Reproducible high-aluminum fireproof raw material utilizing ferrotitanium slag as main material and preparation method thereof

Abstract

The invention relates to a reproducible high-aluminum fireproof raw material utilizing ferrotitanium slag as a main material and a preparation method thereof. The technical scheme is as follows: grinding ferrotitanium slag globules until the granularity is less than or equal to 100 mu m, putting the ferrotitanium slag powder into a muffle furnace, and incinerating at a temperature of 700-750 DEG C for 3-5 hours; adding 1-3mol / L hydrochloric acid solution into the incinerated ferrotitanium slag powder, wherein the mass ratio of the incinerated ferrotitanium slag powder to the hydrochloric acid solution is 1:(2-3); stirring, washing with water and performing suction filtration, thereby obtaining precursor ferrotitanium slag powder; then adding water which accounts for 10-15wt% of the precursor ferrotitanium slag powder into the precursor ferrotitanium slag powder, performing wet grinding until the granularity is less than or equal to 60 mu m, performing vacuum mud extrusion molding, and ageing the mixture for 36-48 hours; and putting the mixture into a resistance furnace, heating to 1500-1550 DEG C, performing heat preservation for 1-3 hours, and crushing, thereby obtaining the reproducible high-aluminum fireproof raw material utilizing the ferrotitanium slag as the main material. The preparation method has the characteristics of simple process, low production cost and no special requirements on equipment; and the prepared reproducible high-aluminum fireproof raw material is high in fire resistance and favorable in sintering performance.

Description

technical field [0001] The invention belongs to the technical field of solid waste recycling. Specifically, it relates to a regenerated high-alumina refractory raw material with ferro-titanium slag as the main material and a preparation method thereof. Background technique [0002] Ferro-titanium slag is the slag produced by smelting ferro-titanium alloy. Using ilmenite as the main raw material, aluminum as the reducing agent, and limestone as the slag-forming agent, the preparation of ferro-titanium alloys by aluminothermic reaction under high temperature conditions (generally above 1900°C) is a widely used and mature industrial technology at present. Since the specific gravity of slag and ferro-titanium alloy is different, the two are easy to separate. However, most enterprises use the discarded slag as industrial waste landfill or simple crushing treatment for the building materials industry, which not only causes a waste of resources but also seriously pollutes the env...

AI Technical Summary

Problems solved by technology

However, the use of high alumina bauxite raw materials to prepare high alumina refractory raw materials is affected by impurities in the raw material minerals (SiO 2 ) content, especially Al 2 o 3 with SiO 2 The secondary mullitization in the high-temperature sintering process affects the sintering performance of high-alumina refractory raw materials, resulting in more complicated process control for the preparation of high-alumina refractory raw materials; while using industrial alumina as the starting raw material, the raw material needs to be highly Finely pulverize, pre-calcine, and introduce a sintering accelerator to improve the sintering performance of industrial alumina, and then produce a sintered dense high-alumina refractory raw material, which undoubtedly increases the industrial production cost of high-alumina refractory raw materials. The equipment for preparing high alumina refractory raw materials puts forward higher requirements