Large compound energy-saving refractory brick and production method thereof

Abstract

The invention discloses a large compound energy-saving refractory brick. The brick is composed of a heavy layer and a light layer, wherein the heavy layer adopts a refractory material comprising 50-70wt% of sal refractory aggregates, 5-15wt% of high temperature cement, 5-10wt% of silicon micropowder, 6-18wt% of high aluminum micropowder, 4-14wt% of clay powder, and 0.1-0.3wt% of a water reducer; and the light layer adopts a refractory material comprising 50-70wt% of microporous mullite light aggregates, 5-15wt% of the high temperature cement, 5-10wt% of the silicon micropowder, 6-18wt% of the high aluminum micropowder, 4-14wt% of the clay powder, 2-8wt% of an expanding agent and 0.1-0.3wt% of the water reducer. The large compound energy-saving refractory brick of the invention has the advantages of light whole specific gravity, light weight, strong strength, good thermal shock resistance, high refractoriness (above 1730DEG C), small thermal conduction coefficient, installation convenience and the like.

Description

technical field [0001] The invention relates to a composite energy-saving refractory large brick and a production method thereof. Background technique [0002] my country is the largest developing country in the world, and also the second largest energy producer and consumer in the world. However, my country's energy utilization efficiency is low, only about 35%, far below the level of developed countries. In order to achieve sustainable economic and social development, we must take the road of saving resources, and at the same time continuously improve energy utilization efficiency. [0003] Industrial kilns are the main energy-consuming equipment in industrial production, and energy saving is an important topic at present. At present, glass melting furnaces and other thermal equipment are generally built with large clay bricks, and the bulk density of the bricks is usually greater than 2.40g / cm 3 , the thermal conductivity is greater than 1.00W / m·k (hot surface 1000°C), ...

AI Technical Summary

Problems solved by technology

At present, glass melting furnaces and other thermal equipment are generally built with large clay bricks, and the bulk density of the bricks is usually greater than 2.40g / cm 3 , the thermal conductivity is greater than 1.00W / m·k (hot surface 1000°C), glass melting furnaces and other thermal equipment built with this brick have large heat capacity, fast heat dissipation, poor thermal insulation performance and thermal shock resistance, so lead to Glass melting furnaces and other thermal equipment have high energy consumption, low thermal efficiency, difficult temperature control, and short service life

[0004] CN101768006A discloses a lightweight refractory material for a glass melting furnace, which has the characteristics of small specific gravity, light weight, and small thermal conductivity, but the microporous mullite lightweight aggregate and expansion agent added to the composition make the refractory After the material is made of refractory bricks, it has a loose expansion structure, which reduces the density and thermal conductivity of the refractory bricks, but the compressive strength of the refractory bricks is affected. As a supporting matrix, it will affect the overall strength of the glass melting furnace and affect its service life.

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