Lightweight refractory for glass smelting kiln

Abstract

The invention discloses a lightweight refractory for a glass smelting kiln. The lightweight refractory is prepared from the following raw materials in percentage by weight: 40-60% of micropored lightweight mullite aggregates, 5-15% of high-temperature cement, 5-10% of silica powder, 6-18% of high-alumina powder, 4-12% of clay powder, 2-8% of expansion agents and 0.1-0.3% of water reducing agent. The lightweight refractory has the advantages of small proportion, light weight, high strength, good thermal shock resistance, high refractoriness (higher than 1650 DEG C), low thermal conductivity and the like. Being used for the glass smelting kiln instead of the common large clay brick materials, the lightweight refractory can greatly reduce the weight of the kiln by 30-60% and reduce the heat capacity and has good thermal shock resistance, thus greatly improving the service life of the kiln; meanwhile, the lightweight refractory has low coefficient of heat conductivity, good heat insulation effect and little heat loss, saves the cost, obviously improves the heat utilization efficiency and saves the energy.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a lightweight refractory material for a glass melting furnace. 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 kiln is the main energy-consuming equipment in industrial production, and its energy-saving problem is an important topic at present. Taking the float glass industrial furnace as an example, at present, the float glass industrial furnace is generally built with large clay bricks, and the bulk density of the bricks is usually greater than 2.40...

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Problems solved by technology

Taking the float glass industrial furnace as an example, at present, the float glass industrial furnace is 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), the glass industrial kiln built with this brick has a large heat capacity, fast heat dissipation, poor thermal insulation performance and thermal shock resistance, which leads to high energy consumption of the glass kiln , low thermal efficiency, difficult temperature control, and short service life

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