Mica tailings aerated building block and preparation method thereof
A technology of mica tailings and aerated blocks, which is applied in ceramic products, climate sustainability, and other household appliances, etc.
Active Publication Date: 2017-05-10
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
[0005] The purpose of the present invention is to provide a mica tailings aerated block and its preparation method, aiming to provide an effective way for the large-scale resource utilization of mica tailings, and to solve the problem of using mica tailings as siliceous raw materials to prepare aerated blocks Technological issues such as the fineness of the block, the design of the mix ratio, and the corresponding parameters of the autoclave system
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[0021] like figure 1 Shown: the preparation method of the mica tailings aerated block provided by the embodiment of the present invention comprises the following steps:
[0022] S101: Grind the mica tailings to a fineness of less than 20% of the 80μm sieve;
[0023] S102: Weigh 20%-50% of calcium components, 0.05%-0.2% of aluminum powder, 1%-5% of reinforcing components, 1%-5% of auxiliary components and ground mica tailings 40 by mass ratio %~70%, add to the mixer; add 25%~40% water of the mixed powder mass, stir evenly, put it into the mold, and let it rest for 1 hour to 1.5 hours at 40℃~80℃ to gas;
[0024] S103: After demoulding, cut it into the required size, put it into an autoclave for autoclave curing, the temperature is 160°C to 230°C, and the autoclave time is 5 hours to 10 hours;
[0025] S104: After cooling, take out the kettle to obtain mica tailings aerated blocks.
[0026] The embodiment of the present invention provides a mica tailings aerated block, the com...
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The invention discloses a mica tailings aerated building block and a preparation method thereof. The preparation method includes: grinding mica tailings into 80um with lower than 20% of sieve residue, weighing calcium component, aluminum powder, enhancement component and assistant component to be mixed with the ground mica tailings, adding water, stirring, putting in a mold for aeration, demolding, putting in an autoclave for autoclaved curing, cooling, taking out of the autoclave to obtain the mica tailings aerated building block which is composed of the mica tailings, the calcium component, the aluminum powder, the enhancement component and the assistant component. Using amount of the mica tailings according to a matching ratio can be up to 70%; the building block has following performances: compressive strength of 1.0-15.0MPa, dry density of 300-1000kg / m3, drying shrinkage value smaller than 0.5mm / m, freezing resistance: mass loss smaller than 5% and heat conduction coefficient (dry state) smaller than 0.20W / m.K.
Description
technical field [0001] The invention belongs to the technical field of resource utilization of industrial solid waste, and in particular relates to a mica tailings aerated block and a preparation method thereof. Background technique [0002] In the process of mica production, a large number of tailings are produced, and their storage not only occupies a large amount of land, but also causes serious environmental pollution, which is in urgent need of resource utilization. [0003] The currently used building aerated blocks mainly use quartz powder, clay, fly ash, etc. as the main siliceous raw materials, which are combined with calcareous raw materials, and are produced by an autoclave process. [0004] At present, there is no effective utilization method of mica tailings. If mica tailings are used as siliceous raw materials to prepare aerated blocks for construction projects, they can be consumed in large quantities and turn waste into treasure. However, the chemical compos...
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Patent Timeline
Login to View More IPC IPC(8): C04B38/02C04B28/10C04B28/00C04B18/12
CPCC04B28/00C04B28/10C04B2201/20C04B2201/32C04B2201/50C04B18/12C04B14/42C04B14/46C04B16/02C04B22/143C04B18/08C04B18/142C04B18/141C04B22/04C04B38/02C04B40/024Y02W30/91
Inventor 封孝信刘刚王春梅杨立荣胡晨光
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY