Burnt magnesite brick for replacing paper pulp by dextrose monohydrate and production method of burnt magnesite brick

Abstract

The invention relates to the field of fire resistant materials, in particular to a burnt magnesite brick for replacing paper pulp by dextrose monohydrate and a production method of the burnt magnesitebrick. The burnt magnesite brick comprises, by weight, 22-41 parts of 92 brick-making magnesite, 1-8 parts of 92 waste bricks, 3-5 parts of calcined Al2O3 micro-powder and 3-5 parts of binding agentdextrose monohydrate. The physicochemical indexes of the burnt magnesite brick includes the weight percentage content of MgO is larger than or equal to 92%, the weight percentage content of Al2O3 is smaller than or equal to 0.4%, the weight percentage content of SiO2 is smaller than or equal to 3%, the weight percentage content of Fe2O3 is smaller than or equal to 1.10%, the weight percentage content of CaO is smaller than or equal to 1.05%, compression strength is larger than or equal to 100.4MPa, apparent porosity is smaller than or equal to 17.0, and volume density is larger than or equal to 2.92g/cm<3>. The production method includes the steps: 1) raw material crushing, screening and grinding; 2) distributing; 3) mixing; 4) forming; 5) drying and sintering. According to the burnt magnesite brick and the preparation method, pollution is omitted, environment-friendly effects are achieved, a desulfurization device is omitted, so that flue gas emission standards can be achieved, sintering can be effectively facilitated, cost is saved, and pollution is low.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a fired magnesia brick in which glucose monohydrate is used instead of pulp and a production method thereof. Background technique [0002] Magnesia brick refers to an alkaline refractory material with a magnesium oxide content of more than 90% and periclase as the main crystal phase. Sintered magnesia bricks use high-quality sintered magnesia as the main raw material and pulp as the binder. After kneading and high-pressure molding, it is fired in a high-temperature tunnel kiln above 1550°C. Magnesia bricks have high refractoriness, good alkali slag resistance, high load softening temperature, good thermal stability, corrosion resistance and peeling resistance. Mainly used in steelmaking alkaline open hearth furnace, electric furnace bottom and furnace wall, permanent lining of oxygen converter, non-ferrous metal smelting furnace, high temperature tunnel kiln, calcined magnes...

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Problems solved by technology

On the one hand, it increases the loss of sulfur removal equipment, on the other hand, it also pollutes the atmosphere and causes environmental damage

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