Clay light-weight brick and preparation method thereof

A lightweight brick and clay technology, applied in the field of lightweight bricks, can solve the problems of difficult dispersion of mullite fiber and high cost of raw materials, and achieve the effect of reducing production cost and energy consumption, low production cost and good compressive strength

Inactive Publication Date: 2013-12-11
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patented technology of "a lightweight porous heat-insulating refractory material and its preparation method and application" (CN101638324A), which uses clay, mullite fiber, and expanded perlite powder as the main raw materials to prepare lightweight porous heat-insulating refractory materials , but the cost of raw materials is high and the mullite fiber is not easy to disperse evenly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A clay lightweight brick and a preparation method thereof. First, 35~40wt% kyanite, 40~45wt% fly ash and 15~25wt% soft clay are used as raw materials, and 35~40wt% closed-cell expanded perlite and 6~8wt% of the raw materials are added. Phosphoric acid, mixed evenly, granulated, dried, and then baked at 120-150°C for 20-28 hours to obtain clay lightweight aggregate.

[0022] Then with 10~20wt% of the first grade clay lightweight aggregate, 20~30wt% of the second grade clay lightweight aggregate, 15~25wt% of the third grade clay lightweight aggregate, 15~20wt% of fly ash, 15-20wt% kyanite and 10-15wt% bentonite are used as a mixture, and 40-45wt% bran and 5-10wt% phosphoric acid are added to the mixture, mixed evenly, semi-dry machine press molding, drying, and Heat preservation at 1200~1250℃ for 8~10h to make clay lightweight bricks.

[0023] The bulk density of the product made in this embodiment 1 is 0.72 ~ 0.8g / cm 3 , compressive strength 7.1~8.5MPa, line change ra...

Embodiment 2

[0025] A clay lightweight brick and a preparation method thereof. First use 35~40wt% kyanite, 40~45wt% fly ash and 15~25wt% bentonite as raw materials, add 35~40wt% rice husk powder and 6~8wt% polychlorinated Aluminum, mixed evenly, granulated, dried, and then baked at 150-180°C for 20-28 hours to obtain clay lightweight aggregate.

[0026] Then with 10~20wt% of the first grade clay lightweight aggregate, 20~30wt% of the second grade clay lightweight aggregate, 15~25wt% of the third grade clay lightweight aggregate, 15~20wt% of fly ash, 15~20wt% of kyanite and 10~15wt% of soft clay are used as a mixture, plus 40~45wt% of closed-cell expanded perlite and 5~10wt% of polyaluminium chloride in the mixture, mixed evenly, semi Dry vibration and pressure molding, drying, and heat preservation at 1250-1300°C for 7-9 hours to make clay lightweight bricks.

[0027] The bulk density of the product made in this embodiment 2 is 0.73 ~ 0.8g / cm 3 , compressive strength 6.7~8.0MPa, line ch...

Embodiment 3

[0029] A clay lightweight brick and a preparation method thereof. First, 35~40wt% of burnt gemstone, 40~45wt% of fly ash and 15~25wt% of soft clay are used as raw materials, plus 40~45wt% of sawdust and 6~8wt% of silica sol, and mixed Homogenize, granulate, dry, and then bake at 180-210°C for 20-28 hours to obtain clay lightweight aggregate.

[0030] Then with 10~20wt% of the first grade clay lightweight aggregate, 20~30wt% of the second grade clay lightweight aggregate, 15~25wt% of the third grade clay lightweight aggregate, 15~20wt% of fly ash, 15~20wt% burnt gemstone and 10~15wt% soft clay are used as a mixture, plus 45~50wt% sawdust and 5~10wt% silica sol of the mixture, mixed evenly, and semi-dry machine press molding, Dry and keep warm at 1300~1350°C for 5~7h to make clay lightweight bricks.

[0031] The bulk density of the product made in this embodiment 3 is 0.64 ~ 0.71g / cm 3 , compressive strength 5.1~6.5MPa, line change rate after burning -1.6~-1.9%, thermal condu...

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Abstract

The invention relates to a clay light-weight brick and a preparation method thereof. The technical scheme is as follows: the preparation method comprises the following steps of: firstly applying 30-40wt% of kyanite or flint clay, 35-45wt% of coal ash and 15-35wt% of plastic clays as raw materials, additionally adding 35-55wt% of pore-forming agents of the raw materials or 2-4wt% of polystyrene spheres, then additionally adding 6-10wt% of bonding agents of the raw materials, uniformly mixing, granulating, drying, and baking at 120-300 DEG C to prepare clay light-weight aggregates; then applying 10-20wt% of first-stage aggregates, 20-30wt% of second-stage aggregates, 15-25wt% of three-stage aggregates, 15-25wt% of the coal ash, 10-20wt% of the kyanite or the flint clay and 10-20wt% of the plastic clays as mixed materials, additionally adding 40-60wt% of the pore-forming agents of the mixed materials or 2-4wt% of the polystyrene spheres, then additionally adding 5-15wt% of the bonding agents of the mixed materials, uniformly mixing, forming, drying, and keeping temperature at 1200-1400 DEG C for 3-10 hours. The preparation method disclosed by the invention has the advantages of low cost, energy conservation and environmental friendliness; the product prepared through the method disclosed by the invention has the advantages of low volume density, good compressive strength as well as small linear changing rate and low heat conduction coefficient after being burnt.

Description

technical field [0001] The invention belongs to the technical field of lightweight bricks. In particular, it relates to a clay lightweight brick and a preparation method thereof. Background technique [0002] In today's energy shortage, energy saving and consumption reduction is an issue that the country pays more and more attention to, and the use of lightweight heat insulation materials is one of the important measures for energy saving and consumption reduction. Heat insulation products made of floating beads (glassy bead-shaped hollow microspheres formed by the ash in fly ash in a high-temperature flame through melting, balling and condensation) as the main raw material have low volume density and high strength. High and low thermal conductivity are widely used in thermal industrial production. However, it is difficult and inefficient to sort out floating beads from fly ash, resulting in a small output of floating beads and relatively expensive prices, which not only l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/135C04B38/06
CPCY02P40/60
Inventor 李远兵向若飞李淑静李亚伟桑绍柏
Owner WUHAN UNIV OF SCI & TECH
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