Haydite prepared from dregs of oil shale, and preparation method

A technology of oil shale slag and ceramsite, applied in applications, household utensils, clay products, etc., can solve the problems of low added value, acidification, and hazards to residents' health, reduce drying shrinkage and deformation, accelerate the drying process, and improve The effect of intensity

Inactive Publication Date: 2006-12-06
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These wastes contain a large amount of toxic or potentially toxic substances, such as heavy metal elements, trace radioactive elements, carcinogens, etc. After being leached or diffused by rainwater, they seriously pollute the surrounding water sources, land and organisms, destroy agricultural production, and poison and acidify the land. Destroy the productive capacity of the soil, thereby endangering the health of residents
The scope of its pollution often exceeds several times the land area it occupies, leading to serious ecological environment pollution
[0003] From the perspective of utilization, oil shale slag is used in road construction like fly ash, although the amount is relatively large, but the added value is too low

Method used

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  • Haydite prepared from dregs of oil shale, and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1-13

[0028] The present invention uses the ceramsite prepared by oil shale slag and the embodiment 1-13 of preparation method thereof, and its method step is:

[0029] (1) Crush the raw materials separately, mix them and grind them finely, add water to make balls; the specific steps are:

[0030] a. Crushing the raw materials into powder respectively;

[0031] b. Raw material allocation: Weigh the required amount of raw materials according to the formula;

[0032] c. Mixing material: Pour the prepared mixed material into the fast grinder, grind for 3-5 minutes, and finally make the particle size of the mixed material meet the following requirements: the particle size is less than 0.1mm, and the weight of particles with a particle size greater than 0.05mm It accounts for 25-35% of the total weight of raw materials, and the weight of particles with a particle diameter less than 0.05mm accounts for 65-75% of the total weight of raw materials.

[0033] d. Forming balls: Method 1, add...

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Abstract

This invention relates to a method for manufacturing ceramic particles from oil shale slag. The method comprises: (1) grinding oil shale slag into particles; (2) drying; (3) sintering at 1000-1300 deg.C; (4) cooling to obtain the final product. The obtained porous ceramic particles have low water absorbency (lower than 3%), and high cylinder compressive strength (higher than 6.5 MPa).

Description

technical field [0001] The invention relates to ceramsite, a lightweight aggregate used in the construction industry, especially ceramsite and a preparation method thereof. Background technique [0002] Oil shale slag is the stripped soil and rock ash produced during the mining, refining and burning of oil shale. Its sources include the residue left after oil shale dry distillation to extract shale oil, the residue after oil shale combustion for power generation, and the slag produced by direct combustion of oil shale as fuel. The main minerals contained in oil shale slag are quartz, kaolin, hematite, mica, corundum, dolomite, pyrite, etc., which are similar pozzolanic barren materials with a small amount of residual carbon, and have a certain particle size. Due to the removal of volatile matter, carbonaceous or other organic acids, etc. in the dry distillation or combustion process, a porous structure is formed, which has good activity. In the early stages of oil shale de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/13C04B33/132C04B14/04
CPCC04B38/009C04B18/023Y02W30/91C04B14/06C04B14/068C04B14/22C04B18/167
Inventor 郭立严春杰王焰新
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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