Method for preparing magnesia-hercynite refractory material

A technology of iron-aluminum spinel and aluminum spinel is applied in the field of preparation of magnesia-iron-aluminum spinel refractory materials, which can solve the problems of poor hydration resistance, poor kiln skin property, poor thermal shock resistance, etc. Good thermal shock resistance, easy to hang kiln skin, good corrosion resistance to cement clinker
CN101891491AInactive Publication Date: 2010-11-24XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
Publication Date
2010-11-24
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a method for preparing a magnesia-hercynite refractory material. The method comprises the following steps of: synthesizing the hercynite by using an electric smelting method; uniformly mixing the hercynite, magnesia and spent pulping liquor serving as raw materials according to a certain proportion, and sealing and baling the mixture; placing the prepared mixture into a mould for compression molding; drying the molded sample for 12 to 24 hours in a drying box; sintering the sample in a high temperature electric furnace; and cooling the sample to obtain the sintered magnesia-hercynite refractory material. The magnesia-hercynite refractory material prepared by the method has high kiln coating adherence, superior high temperature structural flexibility and superior cement clinker erosion resistance. The method has the advantages of simple process, high applicability and capability of being widely applied to various industries such as metallurgy, building materialsand the like.
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Description

technical field

[0001] The invention belongs to the technical field of inorganic non-metallic materials, in particular to a preparation method of magnesium oxide iron aluminum spinel refractory material. technical background

[0002] In the 1960s and 1970s, magnesia-chrome refractory materials were widely used in the firing zone of cement rotary kilns due to their good kiln skin and chemical corrosion resistance of cement clinker, but after use, magnesia-chrome refractory bricks The compound containing hexavalent chromium in it is a water-soluble carcinogen and will cause long-term pollution to the environment. Therefore, chromium-free refractories for cement rotary kilns are an inevitable trend. At present, the chromium-free refractory materials used in the firing zone of cement rotary kiln mainly include magnesia dolomite bricks and magnesia aluminum spinel bricks. Magnesia-dolomite bricks have good chemical compatibility with cement clinker and excellent kiln-hanging pro...

Claims

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