A kind of ceramsite and preparation method thereof

A technology of ceramsite and particle size, which is applied in the field of ceramsite and its preparation, can solve the problems of preparation of ceramsite, poor swelling, no compounding, etc., achieve the effect of hard shell, reduce production cost, and improve utilization rate

Active Publication Date: 2022-07-15
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 raw 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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  • A kind of ceramsite and preparation method thereof

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preparation example Construction

[0038] The present invention also provides a preparation method of ceramsite, and the preparation method is used to prepare the ceramsite, including:

[0039] S1: Both the quartz mica schist A and the quartz mica schist B are crushed, and the particle size is ensured to be less than 8 mm;

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

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

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

[0043] S5: Put the raw pellets into an oven, and dry them at a temperature of 90 to 110° C. for 1 to 3 hours;

[0044] S6: put the dried raw pellets into a high-temperature furnace that has been heated to 300-500°C, and perform high-temperature...

Embodiment 1

[0052] S1: Both the quartz mica schist A and the quartz mica schist B are crushed, and the particle size is ensured to be less than 8 mm;

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

[0054] S3: By mass percentage, mix 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, and grind them To form a raw meal:

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

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

[0057] S6: put the dried raw pellets into a high-temperature furnace heated to 300°C, and perform high-temperature calcination after heating at 20°C / min, and the temperature during calcination is 1240°C and the time is 10min;

[0058] S7: Naturally cool the raw pellets calcined at high temperature to obtain ceramsite, and the bulk density of ceramsite ...

Embodiment 2

[0060] S1: Both the quartz mica schist A and the quartz mica schist B are crushed, and the particle size is ensured to be less than 8 mm;

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

[0062] S3: By 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 are mixed and ground to Form the raw meal:

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

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

[0065] S6: put the dried raw pellets into a high-temperature furnace heated to 300°C, and perform high-temperature calcination after heating at 20°C / min, and the temperature during calcination is 1250°C and the time is 15min;

[0066] S7: Naturally cool the raw pellets calcined at high temperature to obtain ceramsite, and the bulk density of ceramsite is 3...

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Abstract

The invention discloses a ceramsite and a preparation method thereof. The ceramsite includes quartz mica schist A, quartz mica schist B, phosphogypsum and additives, etc., which do not need to consume clay, shale and fly ash and are expensive Instead of using widely distributed quartz mica schist A and quartz mica schist B as raw materials, it not only improves the utilization rate of minerals, but also reduces the production cost of ceramsite. Moreover, when the ceramsite is prepared, the ceramsite does not crack and has good stability during calcination, the product shell is hard, and the bulk density is 200-500kg / m 3 , can reach 100~300kg / m 3 The ultra-light range, the 1h water absorption rate is 0.5% to 2%, especially suitable for the preparation of low-density concrete.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a ceramsite and a preparation method thereof. Background technique [0002] Metamorphic rocks are one of the three major categories of rocks and are the main components of the crust. They are widely distributed around the world. They are magmatic or sedimentary rocks that were first formed in the crust. Under the influence of changes in environmental conditions, mineral composition, chemical It is 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 more than one million squ...

Claims

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Application Information

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Patent Type & Authority Patents(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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