Novel ceramsite and preparation method thereof

A new technology of ceramsite, which is applied in the field of building materials, can solve the problems of ceramsite preparation, no compounding, poor swelling performance, etc., and achieve the effect of reducing production cost, improving utilization rate, and hard shell

Active Publication Date: 2021-02-26
HUAXIN CEMENT
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Problems solved by technology

At present, many scientific researchers have studied the preparation of ceramsite from different solid wastes, and achieved a series of results. For example, Chinese invention patent application CN110862270A discloses a light fly ash ceramsite and its preparation method. Not only consumes kaolin resources, but also uses a large amount of fly ash which is not low in the market today as the main raw material, and the formula is not economical to prepare ceramsite; Chinese invention patent application CN108569910A discloses a construction ceramsite and its preparation method , which uses iron tailings as the main raw material to prepare a new type of ceramsite, with a high water absorption rate, generally above 2%, and uses 10% to 20% fly ash as raw material, and its iron tailings utilization rate is 60% to 60%. 80%; Chinese invention patent application CN110683833A discloses a ceramsite process using iron tailings as the main raw material. It does not compound other materials or use admixtures, but only uses iron tailings as raw materials to prepare ceramsite , the utilization rate of iron tailings reaches 100%, but the bulk density of the prepared ceramsite is too high, at 1000kg / m 3 Above, poor inflammability
[0005] However, at present, regional metamorphic rock (i.e. cheap solid waste) is mainly used as the main raw material in the preparation process of ceramsite, and there is no relevant content on how to use schist with different degrees of metamorphism to prepare ceramsite

Method used

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  • Novel ceramsite and preparation method thereof

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preparation example Construction

[0038] The present invention also provides a kind of preparation method of novel ceramsite, described preparation method is used for preparing described novel ceramsite, comprises:

[0039] S1: Crushing both the quartz mica schist A and the quartz mica schist B, and ensuring that the particle size is less than 8mm;

[0040] S2: put the crushed quartz-mica schist A and quartz-mica schist B into an oven, and dry at a temperature of 100-110° C. for 1-3 hours;

[0041] S3: In terms of mass percentage, 60% to 70% of crushed quartz mica schist A, 25% to 35% of crushed quartz mica schist B, 2% to 4% of phosphogypsum and 0.5% to 1% additives are blended and ground to form a raw meal:

[0042] S4: Put the raw meal into the granulator to form raw meal balls;

[0043] S5: put the raw meal balls into an oven, and dry at a temperature of 90-110°C for 1-3 hours;

[0044] S6: Put the dried raw meal balls into a high-temperature furnace heated to 300-500°C, heat up at 15-25°C / min, and then...

Embodiment 1

[0052] S1: Crushing both the quartz mica schist A and the quartz mica schist B, and ensuring that the particle size is less than 8mm;

[0053] S2: put the crushed quartz-mica schist A and quartz-mica schist B into an oven, and dry at a temperature of 105° C. for 2 hours;

[0054] S3: In terms of mass percentage, 70% of crushed quartz mica schist A, 26.5% of crushed quartz mica schist B, 3% of phosphogypsum and 0.5% of silicon carbide powder were mixed and ground To form raw meal:

[0055] S4: Put the raw meal into the granulator to form raw meal balls;

[0056] S5: put the raw meal balls into an oven, and dry them at a temperature of 105°C for 2 hours;

[0057] S6: Put the dried raw meal balls into a high-temperature furnace heated to 300°C, heat up at 20°C / min, and then perform high-temperature calcination, and the temperature for calcination is 1240°C, and the time is 10 minutes;

[0058] S7: Naturally cool the raw material balls that have been calcined at high temperatur...

Embodiment 2

[0060] S1: Crushing both the quartz mica schist A and the quartz mica schist B, and ensuring that the particle size is less than 8mm;

[0061] S2: put the crushed quartz-mica schist A and quartz-mica schist B into an oven, and dry at a temperature of 105° C. for 2 hours;

[0062] S3: In terms of mass percentage, 61.5% of crushed quartz mica schist A, 35% of crushed quartz mica schist B, 3% of phosphogypsum and 0.5% of aluminum powder were mixed and ground to obtain Form raw meal:

[0063] S4: Put the raw meal into the granulator to form raw meal balls;

[0064] S5: put the raw meal balls into an oven, and dry them at a temperature of 105°C for 2 hours;

[0065] S6: Put the dried raw meal balls into a high-temperature furnace heated to 300°C, heat up at 20°C / min, and then perform high-temperature calcination, and the temperature for calcination is 1250°C, and the time is 15 minutes;

[0066] S7: The new type of ceramsite can be obtained by natural cooling of the raw material...

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Abstract

The invention discloses novel ceramsite and a preparation method thereof. The novel ceramsite comprises quartz mica schist A, quartz mica schist B, ardealite, additives and the like, high-price materials such as clay, shale and coal ash do not need to be consumed, but the widely-distributed quartz mica schist A and quartz mica schist B are used as raw materials, not only is the utilization rate ofminerals increased, but also the production cost of the ceramsite is reduced. Moreover, during preparation of the novel ceramsite, the ceramsite does not crack and has good stability during calcination, the shell of the product is hard, the stacking density is 200-500 kg / m < 3 > and can reach an ultra-light range of 100-300 kg / m < 3 >, the 1h water absorption rate is 0.5%-2%, and the novel ceramsite is particularly suitable for preparing low-density concrete.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a novel ceramsite and a preparation method thereof. Background technique [0002] Metamorphic rocks belong to one of the three major types of rocks and are the main components of the earth's crust. They are widely distributed around the world. They are igneous rocks or sedimentary rocks that were first formed in the earth's crust. Under the influence of changes in environmental conditions, mineral composition, chemical Formed by changes in composition and structure. According to the type of metamorphism, metamorphic rocks are divided into contact metamorphic rocks, dynamic metamorphic rocks, regional metamorphic rocks and migmatites. Among them, regional metamorphic rocks are the most widely distributed, and regional metamorphic rocks have a large exposed area on shields and blocks. , often tens of thousands to hundreds of thousands of square kilometers, sometimes up ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/02C04B20/06
CPCC04B18/027C04B20/06C04B18/023C04B14/20C04B22/144
Inventor 田建平孙航蔡肖胡东甫陶磊
Owner HUAXIN CEMENT
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