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Ultralight ceramsite and preparation method thereof

A technology of ultra-light pottery and ceramsite, applied in the field of building materials, can solve the problems of uneconomical formula and low utilization rate, and achieve the effect of less openings, low water absorption rate, and improved utilization rate

Active Publication Date: 2021-03-05
HUAXIN CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, some scientific researchers have studied the resource utilization of mine stripped soil, and achieved a series of results. For example, the Chinese invention patent application CN110862270A discloses a cement production process using limestone mine stripped soil, which utilizes 9.2% to 9.8% Exfoliated soil replaces part of clay and limestone, and adopts appropriate technological measures to produce cement with better performance, but the utilization rate is still low; Jia Xiaozhao's "Research on the Preparation of Lightweight Ceramsite Using Waste High Plastic Red Clay in Mine" shows: The utilization rate of abandoned high plastic red clay in the mine has reached 85.5%, but 7% of ordinary clay, 3.5% of compound L (a confidential commercially available chemical agent), and 1% of coal powder are used. The formula is not economical, and compound L is also Undisclosed, when the bulk density of the prepared ceramsite is 420kg / m3, the cylinder compressive strength is only 11% higher than the standard, and the 1h water absorption rate is 10.7%.

Method used

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  • Ultralight ceramsite and preparation method thereof
  • Ultralight ceramsite and preparation method thereof

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preparation example Construction

[0035] The present invention also provides a preparation method of ultra-light ceramsite, the preparation method is used to prepare the ultra-light ceramsite, comprising:

[0036] S1: crush the stripped soil and ensure that the particle size is less than 8mm;

[0037] S2: put the crushed exfoliated soil into an oven, and dry at a temperature of 100-110° C. for 1-3 hours;

[0038] S3: In terms of mass percentage, 80%-95% of exfoliated soil, 5%-20% of alkaline feldspar and 2%-4% of phosphogypsum are mixed and ground to form raw meal:

[0039] S4: Put the raw meal into the granulator to form raw meal balls;

[0040] S5: Put the raw meal balls into an oven, and dry them at a temperature of 60-80°C for 2-3 hours;

[0041] S6: Put the dried raw meal balls into a high-temperature furnace for preheating;

[0042] S7: heating the high-temperature furnace at a heating rate of 15-25° C. / min, so as to perform high-temperature calcination on the raw meal balls located in the high-temper...

Embodiment 1

[0050] S1: crush the stripped soil and ensure that the particle size is less than 8mm;

[0051] S2: put the crushed exfoliated soil into an oven, and dry at a temperature of 105° C. for 2 hours;

[0052] S3: In terms of mass percentage, 91.5% of exfoliated soil, 5% of alkaline feldspar and 3.5% of phosphogypsum are mixed and ground to form raw meal, and the sieve rate when the particle size of the raw meal is 80 μm Not more than 40% of:

[0053] S4: Put the raw meal into a granulator to form raw meal balls, and the particle size of the raw meal balls is 8mm-12mm;

[0054] S5: Put the raw meal balls into an oven, and dry them at a temperature of 70°C for 2 hours;

[0055] S6: Put the dried raw meal balls into a high-temperature furnace for preheating, and the temperature of the preheating treatment is 350°C for 25 minutes;

[0056] S7: heating the high-temperature furnace at a heating rate of 20°C / min to perform high-temperature calcination on the raw meal balls located in t...

Embodiment 2

[0063] S1: crush the stripped soil and ensure that the particle size is less than 8mm;

[0064] S2: put the crushed exfoliated soil into an oven, and dry at a temperature of 105° C. for 2 hours;

[0065] S3: In terms of mass percentage, 87% of exfoliated soil, 9.5% of alkaline feldspar and 3.5% of phosphogypsum are mixed and ground to form raw meal, and the sieve rate when the particle size of the raw meal is 80 μm Not more than 40% of:

[0066] S4: Put the raw meal into a granulator to form raw meal balls, and the particle size of the raw meal balls is 8mm-12mm;

[0067] S5: Put the raw meal balls into an oven, and dry them at a temperature of 70°C for 2 hours;

[0068] S6: Put the dried raw meal balls into a high-temperature furnace for preheating, and the temperature of the preheating treatment is 320°C for 25 minutes;

[0069] S7: heating the high-temperature furnace at a heating rate of 20°C / min to perform high-temperature calcination on the raw meal balls located in t...

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Abstract

The invention discloses ultralight ceramsite and a preparation method thereof. The ultralight ceramsite comprises stripping soil, alkaline feldspar and ardealite, high-price materials such as clay, shale and fly ash do not need to be consumed, the stripping soil and the alkaline feldspar which are widely distributed are used as raw materials, thus the utilization rate of minerals is increased, andthe production cost of the ceramsite is also reduced. Moreover, when the ultralight ceramsite is prepared, the ceramsite does not crack and has good stability during calcination, and the ceramsite has the advantages of hard and smooth surface, few open pores, low water absorption and high cylinder compressive strength.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an ultra-light ceramsite and a preparation method thereof. Background technique [0002] Many mines in my country often encounter stripped soil (i.e. mine surface miscellaneous soil) during the mining process. As the mine height decreases during mining, the stripped amount also increases. After stripping, a large amount of accumulation will seriously affect the normal operation of the mine. Mining, if the stripping is continued, it will increase the cost of mining, and it is easy to cause natural disasters such as soil erosion and mudslides. The resource utilization of mine stripped soil is still limited to partial replacement of raw materials, cement admixture, concrete admixture, and fine aggregate, which are used to prepare cement and concrete. The recycling rate is low and the effect is not good. [0003] Ceramsite belongs to artificial light aggregate, which is ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/19C04B35/622
CPCC04B35/19C04B35/62204C04B2235/3418C04B2235/3427C04B2235/448C04B2235/77C04B2235/96Y02P40/60Y02W30/91
Inventor 孙航田建平胡东甫蔡肖陶磊
Owner HUAXIN CEMENT
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