Method for producing siliceous heat insulation firebrick

Abstract

A method of producing adiabatic fireproof bricks containing silicon. The main component is silex, the raw material also includes expanded perlite. The weight ratio of each component is sliex 70-90, expanded perlite 10-30. The method is characterized in adding expanded perlite into the raw material to replace flammable adding material in the prior raw material. Thus, it could overcome drawbacks inthe current adiabatic fireproof bricks containing silicon. The added expanded perlite is a light material, the content of SiO2 is more than 60%, the main chemical component belongs to silicon and is the glass phrase. In the preparation course, expanded perlite combined with phosphoric quartz could form uniform fine air holes. By replacing flammable adding material by expanded perlite, the invention could save cost, and improve the rate of finished products.

Description

Technical field [0001] The invention belongs to heat insulation material technology, and mainly proposes a production method of silicon heat insulation refractory bricks. Background technique [0002] Silicon heat insulating refractory bricks are mainly used for heat insulation and heat preservation of thermal equipment such as metallurgical building materials and chemicals. China Metallurgical Standards (YB / T386-1994) divides siliceous heat-insulating refractory bricks into GGR1.0-1.2 according to their volume density. At present, siliceous heat-insulating refractory bricks are manufactured by adding combustibles on the basis of silica stone as the main raw material and using the burn-off method. The manufacturing process is: weighing ingredients → adding mineralizers and binders → mixing → billet making → Drying → firing at a temperature of about 1380°C. The mineralizers and binders are generally: ferric chloride powder (mineralizer), lime milk (mineralizer binder), pulp...

AI Technical Summary

Problems solved by technology

A considerable amount of combustibles, such as coal powder and wood powder, are added to the existing siliceous heat-insulating refractory bricks. The combustibles need to be burned during the firing process. The firing temperature curve is heating, heat preservation, and firing time. Longer, generally 9-12 days, when the combustibles are not completely burned, there will be "black hearts" in the product, the single weight exceeds the standard, no sintering, and low compressive strength

Second, combustible residues such as ash remain in the product, which affects the physical and chemical indicators of the product

Its three, burning time is long and causes waste of energy, and the finished product rate is low between 60-80% in addition, and production cost is high