High-aluminum insulating refractory raw material with titanium-iron slag as main material and preparation method thereof

Abstract

The invention relates to a high-aluminum insulating refractory raw material with titanium-iron slag as a main material and a preparation method thereof. The preparation method comprises the following steps: immersing crushed titanium-iron slag in water of 90-95 DEG C for 1-2 h, filtering, drying, and screening; adding a hydrochloric acid solution into the screened titanium-iron slag particles, stirring, washing and carrying out suction filtration, and wet-grinding to obtain wet-ground titanium-iron slag powder; adding the wet-ground titanium-iron slag powder and aluminum powder into a mixer, and mixing to obtain a mixture; Adding a phosphoric acid solution into the mixture, uniformly mixing, vibrating for moulding, and maintaining; finally placing the product into a muffle furnace, heating to 1355-1420 DEG C at the heating rate of 3-5 DEG C/min, carrying out thermal insulation, cooling with the furnace to room temperature, and crushing to obtain the high-aluminum insulating refractory raw material with titanium-iron slag as the main material. The method of the invention has characteristics of simple process, low production cost and no special requirements on equipment. The prepared high-aluminum insulating refractory raw material with titanium-iron slag as the main material has small heat conductivity coefficient, high cylinder compressive strength and good resistance to corrosion of slag.

Description

technical field [0001] The invention belongs to the technical field of high-alumina heat-insulating refractory raw materials. Specifically, it relates to a high-aluminum heat-insulating refractory raw material with ferro-titanium slag as the main material and a preparation method thereof. Background technique [0002] Ferro-titanium slag is the by-product of slag derived from the smelting of ferro-titanium alloy, the main chemical composition is Al 2 o 3 、TiO 2 and CaO, which can be used to prepare high-alumina raw materials, such as the patented technology of "Regenerated high-alumina refractory raw materials with ferro-titanium slag as the main material and its preparation method" (201410161089.X), using ferro-titanium slag as the main raw material to prepare regenerated high-alumina refractory materials Raw materials, the process is simple, which reduces the production cost of high-alumina refractory raw materials, but the high-alumina refractory raw materials prepared...

AI Technical Summary

Problems solved by technology

However, the disadvantages of the foaming method are as follows: first, the process is more complicated, especially the stability of the bubbles is difficult to control; second, the introduction of the foaming agent is easy to introduce new impurities, which reduces the strength and slag erosion resistance of high-alumina raw materials

However, the pores formed by the burn-off method are closely related to the size of the burn-off, and the size is relatively large, which seriously reduces the strength of high-alumina raw materials.