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What are the strict standards for the manufacture of extra-high alumina bricks

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What are the strict standards for the manufacture of extra-high alumina bricks

Date of release:2018-06-06 Author: Click:

The production process of high alumina brick is based on the characteristics of raw materials, high alumina brick requirements, production conditions and other factors to determine the specific technical measures. Strict classification of raw materials, particle classification, storage and iron removal are important links to improve and stabilize the quality of raw materials.




高铝砖


Bauxite clinker was first used for rigorous grading selection. Avoid mixing. According to the quality requirements of different grades of refractory bricks, different grades of raw materials can be used reasonably. Try not to use as many raw materials as possible. Quality requirements for bauxite clinker: the quality of the clinker depends on the temperature at which it is calcined, usually at or slightly above the sintering temperature of bauxite. In order to ensure the material is fully sintered and as high as possible, it can be completed in the calcining process.



Bauxite clinker quality control, in addition to the need for a certain chemical composition, is also determined by the volume density: special grade greater than 3.00mm; Vision Ⅰ grade 2.80 mm; Vision Ⅱ grade 2.55 mm; Ⅲ magnitude 2.45 mm or more.



Choice of formula 1: adhesive: bond with soft clay, and add a small amount of organic binder (such as pulp waste liquid, etc.) to improve the formability of ingredients and enhance the strength of the car body. For Ⅰ Ⅱ composition of high alumina brick, cement shoulds not be too much. General fluctuations in the 5 ~ 10% Ⅲ high aluminum brick, clay is basically not Ⅲ alumina, such as what kind of reaction of secondary mullite.



Therefore, according to the molding and sintering process requirements and the quality requirements of refractory bricks, an appropriate amount of 15~20% refractory bricks can be added. 2) different levels of clinker mixing: two alumina mixing formula, can adjust the composition, namely Al2O3 content, improve the matrix composition of firebrick, mixture should be mixed with the adjacent layer of raw materials can be taken. Al2O3 content of high alumina clinker, it is appropriate to add fine powder.



Choice of particles. The particle composition of high alumina brick is similar to that of multi - clinker clay brick. (3 ~ coarse particles within 1 mm), 1 ~ 0.088 (C), <0.088 (fine) three levels of cooperation, according to the "two big middle small" intermediate particles reduce, increase fine powder, appropriate increase the critical particle size, you can get lower porosity, load high thermal shock resistance under high refractory, brick structural strength.



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Key word:高铝砖,高铝砖价格,湖州高铝砖

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