Method for synthesizing cordierite refractory raw material by solid-phase reaction sintering method

Abstract

The invention relates to a method for synthesizing a cordierite refractory raw material by a solid-phase reaction sintering method, which comprises the following steps: by using binding clay, talcum powder, flint clay powder and alumina which are wide in source and low in cost as raw materials, mixing, drying, grinding, forming and sintering to prepare the cordierite refractory raw material. The cordierite refractory raw material prepared through the method is low in thermal expansion coefficient, a refractory material prepared from the refractory raw material has good thermal shock resistancestability, and the comprehensive quality of the synthesized refractory material can be improved when the refractory raw material prepared through the preparation method is applied to the aspect of refractory material synthesis.

Description

technical field [0001] The invention relates to the field of inorganic chemical industry, in particular to a method for synthesizing cordierite refractory raw material by a solid phase reaction sintering method. Background technique [0002] Cordierite has many excellent properties, especially its low thermal expansion coefficient, excellent thermal shock stability and excellent mechanical properties, making cordierite an ideal raw material for many thermal kilns and thermal equipment for refractory products. However, natural cordierite is relatively scattered, distributed in many metamorphic rocks, magmatic rocks and pegmatites, generally with low content, and rarely enriched into ore. Therefore, it is still difficult to directly use natural cordierite as an industrial raw material. This is why It is necessary to synthesize cordierite from different ways. [0003] Many researchers at home and abroad have done a lot of research on the synthesis methods of cordierite, such a...

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Problems solved by technology

In contrast, although the sol-gel method can appropriately reduce the synthesis temperature, it is difficult to control the synthesis purity; the glass crystallization method can obtain high-purity cordierite powder at low temperature, but the operation process is cumbersome and the cost is high. It is not conducive to industrialization; the solid phase reaction method is the easiest to operate, and the cost is the lowest, and it is most suitable for large-scale industrial production

The commonly used raw materials for the synthesis of cordierite by solid-state reaction are high-purity oxides and natural minerals. The synthesis temperature of high-purity oxide chemical raw materials for cordierite synthesis is relatively low, and the purity of the product is high, but the cost is high, which is not conducive to large-scale production. Industrial production; and the use of natural minerals to synthesize cordierite is low in cost and suitable for industrial production, but the coefficient of thermal expansion is high, which leads to a decrease in the thermal shock stability of the product

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