Refractory material for carbon furnace and preparation method thereof

Abstract

The invention belongs to a refractory material field, and concretely, relates to a refractory material for a carbon furnace and a preparation method thereof. The refractory material for the carbon furnace contains 50-70% of flint clay, 10-30% of bauxite clinker, 5-18% of silicon carbide, 5-15% of alumina, and 5-10% of binding clay, and further contains 3-7% by total weight of binder, wherein the binder is phosphoric acid or phosphate solution with proportion being 1.4-1.5g / cm3, and the refractory material for the carbon furnace of the invention can be obtained by the following steps: batching, mixedly grinding, ageing, forming, roasting under 500-600 DEG C, etc. The refractory material has the advantages of high overpressure resistant intensity, high load softening temperature, good creep resistant performance, low porosity, good thermal shock resistance stability, small linear expansion coefficient, good CO resistant performance, etc., thereby greatly increasing the service life of the carbon furnace. Particularly, the refractory material is roasted without high temperature, so the purposes of energy saving and emission reduction, are achieved.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a refractory material for a carbon roasting furnace and a preparation method thereof. Background technique [0002] At present, the 36-chamber, 42-chamber and even 54-chamber carbon roasting furnaces in the carbon industry are constantly being promoted and applied in my country, and the demand for refractory materials is also increasing. However, the subsidence and breakage of the transverse wall bricks and flue wall bricks of the roaster have become the fatal points that affect the life of the roaster. The standard of low-creep clay bricks on the market was first sourced from abroad. If you want to meet the real low-creep requirements, the price should be around 4,000 yuan / ton, but in the market, it is impossible for the owner to pay such a high price , so the difference between the use effect of low-creep bricks and ordinary clay bricks is not obvious. There ar...

AI Technical Summary

Problems solved by technology

However, the subsidence and breakage of the transverse wall bricks and flue wall bricks of the roaster have become the fatal points that affect the life of the roaster

The standard of low-creep clay bricks on the market was first sourced from abroad. If you want to meet the real low-creep requirements, the price should be around 4,000 yuan / ton, but in the market, it is impossible for the owner to pay such a high price , so the difference between the use effect of low creep bricks and ordinary clay bricks is not obvious

There are also secondary high-alumina bricks. Although their compressive strength and load softening temperature are higher than those of clay bricks, the change rate of the reburning line is relatively large, and the furnace wall is prone to subsidence and fracture during high-temperature use. Thereby reducing the service life of the roaster