Aluminum-silicon light heat insulation brick and preparation method thereof

Abstract

The invention relates to an aluminum-silicon light heat insulation brick and a preparation method thereof. The preparation method comprises the following steps of: uniformly mixing 40-55 percent by weight of light alumina aggregate, 25-40 percent by weight of bauxite chamotte, 5-12 percent by weight of calcium aluminate cement, 8-13 percent by weight of organic polymer, 2-5 percent by weight of silicon powder, 0.05-0.15 percent by weight of water reducing agent and 15-25 percent by weight of water, calendering and molding by casting; curing under the condition of room temperature for 24-48 hours, demolding and drying at the temperature of 100-120 DEG C for 20-36 hours; and preserving heat at the temperature of 1,400-1,550 DEG C for 3-5 hours to obtain the aluminum-silicon light heat insulation brick. The preparation method has the advantages of wide raw materials, simple process and low production cost; the prepared aluminum-silicon light heat insulation brick has the advantages of high compressive strength, low volume density, low heat conductivity, high using temperature, low re-burning linear change rate, high thermal shock stability and the like; the product is applied to various industrial furnace heat insulation layers, has a wide application range and remarkably-reduced energy consumption and temperature outside a furnace, and can be safely and effectively produced.

Description

technical field [0001] The invention belongs to the technical field of lightweight heat-insulating bricks, and in particular relates to an aluminum-silicon light-weight heat-insulating brick and a preparation method thereof. Background technique [0002] Energy shortage is already a severe situation faced by the whole world. Low-carbon environmental protection and energy conservation are one of the important measures for my country to maintain stable economic development. Various industrial kilns and other thermal equipment are important facilities in industrial production and are also large energy consumers. Therefore, heat insulation for kilns and thermal equipment is an important way for their long-term safe use, energy saving and consumption reduction. This is a topic of great significance in order to effectively reduce the surface temperature of the furnace shell, ensure the safe operation of the equipment, and effectively reduce energy consumption. [0003] At presen...

AI Technical Summary

Problems solved by technology

The cost of raw materials for this product is relatively high. Due to the addition of poly light balls, the internal pores of the brick body mainly exist in the form of large pores, and the strength of the material is closely related to the size of the pores. Large pores will inevitably cause stress concentration, resulting in lower strength; In addition, the pore size has a great influence on the thermal conductivity of the material. In the case of the same volume density, the smaller the pore size, the smaller the thermal conductivity. Therefore, the thermal insulation performance of this kind of lightweight heat-insulating brick is average; since the patent is made of inorganic powder , there is no supporting aggregate component, and there is a large line change in high temperature calcination