A kind of high-strength ceramsite and preparation method thereof

A high-strength ceramsite, combined technology, applied in the field of artificial lightweight aggregates, can solve the problems of restricting the large-scale use of coal slime, unqualified water absorption, increasing the cost of raw materials, etc., and achieves the effect of improving the internal porous structure, light bulk density, and improved bulk density.

Active Publication Date: 2021-03-19
TIANJIN CEMENT IND DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Due to the requirements for high-strength ceramsite in the GB / T17431.1-2010 standard: strength label ≧ 25MPa, water absorption ≦ 10%, 600Kg / m 3 ≦Density grade≦1200Kg / m 3 Cylinder compressive strength≧4MPa; Therefore, the ceramsite preparation method disclosed in the above-mentioned patent either has insufficient strength, or unqualified water absorption, or the utilization rate of coal slime≦30%, which limits the large-scale use of coal slime; in addition, adding 15%-30 % Additives such as quartz sand and feldspar, increase raw material cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A preparation method of high-strength ceramsite, the method comprises the following steps:

[0055] S1, decarbonized coal slime, engineering spoil and iron ore are crushed respectively, and then mixed together with the batching ratio in Table 2;

[0056] Table 2 Ingredients Scheme 1

[0057] name Decarbonized coal slime Engineering spoil iron ore Proportion 43％ 50％ 7％

[0058] S2. Grind in a small ball mill to 80 μm and sieve 15%, and use a disc granulator to make raw meal spheres, and the particle size of the raw meal spheres is 5-20mm;

[0059] S3, drying the raw material spheres in an oven at 105° C. for 2 hours;

[0060] S4. Put the dried raw material spheres into the muffle furnace, heat up from room temperature to 200°C, heat up for 25 minutes, and keep warm for 20 minutes; then heat up from 200°C to 600°C, heat up for 45 minutes, and keep warm for 20 minutes; finally Raise the temperature from 600°C to 1180°C for 65 minutes, keep war...

Embodiment 2

[0063] A preparation method of high-strength ceramsite, the method comprises the following steps:

[0064] S1, decarbonized coal slime, engineering spoil and iron ore are crushed respectively, and then mixed together with the batching ratio in Table 3;

[0065] Table 3 Ingredients Scheme 2

[0066] name Decarbonized coal slime Engineering spoil iron ore Proportion 55％ 40％ 5％

[0067] S2. Grind in a small ball mill to 80 μm and sieve 20%, and use a disc granulator to make raw meal spheres. The particle size of the raw meal spheres is 5-20mm;

[0068] S3, drying the raw material spheres in an oven at 105° C. for 2 hours;

[0069] S4. Put the dried raw material spheres into the muffle furnace, heat up from room temperature to 200°C, heat up for 25 minutes, and keep warm for 20 minutes; then heat up from 200°C to 600°C, heat up for 45 minutes, and keep warm for 20 minutes; finally Raise the temperature from 600°C to 1195°C for 65 minutes, heat for 25 ...

Embodiment 3

[0072] A preparation method of high-strength ceramsite, the method comprises the following steps:

[0073] S1, decarbonized coal slime, engineering spoil and iron ore are crushed respectively, and then mixed together with the batching ratio in Table 4;

[0074] Table 4 Ingredients Scheme 3

[0075] name Decarbonized coal slime Engineering spoil iron ore Proportion 70％ 27％ 3％

[0076] S2. Grind in a small ball mill to 80 μm and sieve 25%, and use a disc granulator to make raw meal spheres. The particle size of the raw meal spheres is 5-20mm;

[0077] S3, drying the raw material spheres in an oven at 105° C. for 2 hours;

[0078] S4, then put the dried raw material spheres into the muffle furnace, heat up from room temperature to 200°C, heat up for 20 minutes, and keep warm for 15 minutes; then heat up from 200°C to 600°C, heat up for 40 minutes, keep warm for 15 minutes; finally Raise the temperature from 600°C to 1185°C for 55 minutes, keep warm f...

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Abstract

The invention belongs to the technical field of artificial lightweight aggregates and discloses a high-strength ceramsite and a preparation method thereof. The high-strength ceramsite comprises the raw materials: decarbonized coal slime, project spoil and iron raw materials; the method comprises the following steps: S1, mixing the decarbonized coal slime, the project spoil and a small deal of ironraw materials according to the mass percentage, and then, grinding the mixture by using a ball mill to obtain 15%-30% of 80-m um sieving residues; and S2, preparing a raw sphere by using a disc pelletizer; raising the temperature from the room temperature to 200 DEG C in a muffle furnace, and keeping the temperature; then, raising the temperature to 600 DEG C, and keeping the temperature; and finally, raising the temperature to 1180-1195 DEG C, keeping the temperature, and carrying out natural cooling to the normal temperature to obtain a finished product of the high-strength ceramsite. The high-strength ceramsite is prepared without adding other additives such as 15-30% of quartz sand and feldspar, and the prepared ceramsite has the advantages such as hard surface texture, relatively light volume weight, high cylinder compressive strength and low water absorption rate.

Description

technical field [0001] The invention belongs to the technical field of artificial lightweight aggregates, in particular to a high-strength ceramsite and a preparation method thereof. Background technique [0002] Ceramsite is a common name for artificial lightweight aggregate; due to its multifunctional characteristics such as light weight, corrosion resistance, frost resistance, earthquake resistance and good insulation, ceramsite is widely used in building materials, gardening, sewage treatment, refractory insulation materials, chemical industry, Petroleum and other fields; [0003] At present, the raw materials for the preparation of ceramsite are mainly clay or shale. Since clay is a precious natural resource, vigorous development of clay ceramsite will inevitably lead to the destruction and loss of a large amount of high-quality cultivated land; and the production of ceramsite from shale will destroy natural vegetation. and the environment, and to some extent break the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/132C04B38/00C04B38/06
CPCC04B33/132C04B33/1321C04B38/009C04B38/0675Y02P40/60
Inventor 韩辉王秀龙王彬
Owner TIANJIN CEMENT IND DESIGN & RES INST
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