High-strength and anti-stripping type homogenous composite castable and preparation method

Abstract

The invention provides a high-strength and anti-stripping type homogenous composite castable and a preparation method, and belongs to the technical field of refractory castables. The composite castable comprises the following raw materials by mass percent: 40 to 70% of aggregate and powder of bauxite-based homogenized grogs, 3 to 10% of alumina powder, 2 to 7% of silica powder, 1 to 7% of inorganic binding agent, 5 to 30% of auxiliary raw material, and 0.1 to 0.45% of additive. An efficient dispersing agent and proper additive components are adopted and are prepared into the high-strength and anti-stripping type homogenous composite castable through the blending technique. The high-strength and anti-stripping type homogenous composite castable has the advantages that the composition and structure are uniform, the problems that the conventional high-alumina and corundum castables are low in high-temperature strength, easy to desquamate and crack at high temperature, and poor in resistance to corrosion due to alkali, chlorine and sulfur, can be effectively solved, the life cycle is prolonged, and the plannable performance respect to the maintenance and repair time is improved at the same time.

Description

technical field [0001] The invention belongs to the technical field of refractory castables, in particular to a high-strength anti-stripping homogeneous composite castable and a preparation method thereof. Background technique [0002] From the late 1990s to the present, China's new dry process cement production has developed rapidly, especially large-scale new dry process cement kilns, such as new dry process cement production technology and equipment with a daily output of 5,000 tons and a daily output of 10,000 tons have reached the international advanced level. my country has become the world's cement manufacturing center. At present, there are more than 1,100 large-scale dry-process cement kiln production lines with a daily output of more than 2,000 tons in China. [0003] The substantial increase in the level of production technology and production capacity, and the phased kiln shutdown have put forward new requirements for the dry process cement production line. For e...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a high-strength anti-flaking homogeneous composite castable and its preparation method, which utilizes the chemical composition of the alumina-based homogeneous material, has uniform structure, stable performance, and the main crystal phase is mullite. The linear change is small, and the crystals interpenetrate each other microscopically. , has excellent high-temperature strength, and at the same time has a certain flexibility, and is well combined with the surrounding matrix to improve the current high-alumina bauxite and corundum castables with low high-temperature strength, poor resistance to mechanical stress and thermal stress at high temperatures, and easy to peel off , cracks and other shortcomings, to prepare a high-strength anti-stripping homogeneous composite castable

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