Low-heat conductance silicon corundum brick material and silicon corundum composite brick made of same

Abstract

The invention relates to a low-heat conductance silicon corundum brick material and a silicon corundum composite brick made of the same, and belongs to the technical field of refractory materials. The low-heat conductance silicon corundum brick material comprises a liquid bonding agent and the following solid raw materials in parts by weight: 38-45 parts of bauxite chamotte granules with the content of Al2O3 of more than or equal to 87 percent by weight, 15-20 parts of silicon carbide powder with the content of SiC of more than or equal to 90 percent by weight and the content of free carbon of not less than 5 percent, 8-13 parts of electric smelting white corundum powder with the Al2O3 content of more than or equal to 99 percent by weight, 6-8 parts of andalusite powder with the Al2O3 content of more than or equal to 55 percent by weight, 3-5 parts of SiO2 ultramicro powder with SiO2 content of more than or equal to 95 percent by weight, 0.5-1 part of monatomic silicon ultramicro powder, 0.5-1 part of monatomic aluminum ultramicro powder, 3-5 parts of floating beads with the Al2O3 content of more than or equal to 30 percent by weight and the SiO2 content of more than or equal to 50 percent by weight and 8-10 parts of soft refractory clay with the Al2O3 content of more than or equal to 30 percent by weight. The silicon corundum composite brick made of the low-heat conductance silicon corundum brick material is obtained by carrying out double-surface mechanical pressing and burning on two materials, namely the low-heat conductance silicon corundum brick material and a heavy brick material. When the silicon corundum composite brick provided by the invention is used for building the transitional zone of a cement rotary kiln, the mean temperature of a cylinder body is low and is only 186 DEG C.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, in particular to a silicon corundum brick with low thermal conductivity, and also to a silicon corundum composite brick made of the brick. Background technique [0002] With the continuous update of cement production technology, cement production equipment is becoming more and more large-scale and energy-saving. Increasing production, improving quality, saving energy and reducing consumption, and reducing costs have become the key to increasing the benefits of enterprises. [0003] At present, spinel bricks and silica bricks are still the mainstream refractory bricks for rotary kilns, but these two types of bricks have the defects of high thermal conductivity and large waste of heat energy. For this reason, some manufacturers and scientific research units have carried out a lot of research work, and introduced some composite bricks combining heavy and light weight. However, because ...

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Problems solved by technology

On the one hand, the temperature of the outer wall of the cylinder is too high, which will increase the heat dissipation of the kiln cylinder, thereby increasing the heat consumption of clinker and increasing the unit cost of clinker; The probability of damage to the equipment accelerates the deformation of the cylinder, and the deformation of the cylinder accelerates the mechanical damage of the inner lining. The result is brick falling and kiln shutdown, which affects the operation rate of the cement rotary kiln.

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