Method for preparing sintered water-permeable material from pottery clay

A water-permeable material and clay technology, which is applied in the field of comprehensive utilization of inferior mineral resources, can solve the problems of high cost, difficulty in large-scale utilization of clay, and complicated process, and achieve the effects of enhanced strength, excellent mechanical properties and water permeability

Inactive Publication Date: 2019-05-21
ZUNYI ENERGY & MINERAL INVESTMENT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The above 4 patents are porous ceramics prepared by using clay and other raw materials, but the chemical reaction foaming method is used to form pores, which is costly, easy to form closed pores, complicated process, and difficult to use resources such as clay on a large scale
At the same time, there is no report on the industrial production of clay in the field of architectural ceramics to prepare porous materials or permeable materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A method for preparing permeable bricks by using pottery clay, the preparation method comprising the steps of:

[0040] Step S11, mixing 15-85% clay with 0-30% bauxite tailings, 0-60% siliceous rock, 0-80% weathered rock, 0-20% calcareous rock or A variety of mixtures are mixed and ground according to the mass percentage, and the balance of the 200-mesh sieve of the powder is controlled to be less than 3%;

[0041] Step S12, directly granulating the obtained powder to prepare ceramic powder particles, and sieving them according to the particle size to obtain classified particles of 10-20 mesh size and 20-40 mesh size;

[0042] Step S13, drying the obtained graded granules, controlling the water content to 6-13% by mass; then using 20-40 mesh granules in the bottom layer and 10-20 mesh granules added with coloring agents in the surface layer The particles of the particle size are pressed at 1.5-2.5 MPa to obtain a green body, and the ratio of the compressed height of th...

Embodiment 2

[0050] A method for preparing permeable bricks by using pottery clay, the preparation method comprising the steps of:

[0051] Step S21, mixing 60% of pottery clay, 25% of siliceous rock, and 15% of bauxite tailings according to the mass percentage, and obtaining the mixture powder after dry grinding, and the grinding fineness is less than 3% after a 200-mesh sieve;

[0052] Step S22, sieving the mixed material powder, granulating through a granulator, and selecting 20-40 mesh size particles;

[0053] Step S23, drying the obtained graded granules, controlling the water content to 6-13% by mass; then pressing and molding them into green bodies at 1.5-2.5 MPa, with a compression ratio of 0.43;

[0054] Step S24, drying the green body, controlling the moisture content to <1%; sending the dried ceramic body into a ceramic kiln for firing, the optimum firing temperature is 1160°C, and clay ceramic permeable bricks are obtained after firing.

[0055] The flexural strength of the cl...

Embodiment 4

[0060] This example provides a method for using pottery clay to prepare permeable bricks. The preparation method of this example is the same as the preparation method in Example 2. The difference is that the ratio of raw materials used is: pottery clay 60% , siliceous rock 23%, bauxite tailings 17%. After the raw material is ground and granulated, the particle size of 10-30 meshes is selected for molding, the compression ratio is 0.42, and the firing temperature adopted is 1140°C.

[0061] The flexural strength of the clay ceramic permeable brick obtained in this example is 10.5MPa, and the water permeability coefficient is 2.5×10 - 2 cm / s.

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Abstract

The invention discloses a method for preparing a water-permeable brick from pottery clay. The method comprises the following steps: mixing and grinding one or more of the following raw materials: 15-85% of clay, 0-30% of bauxite tailings, 0-60% of silicalite, 0-80% of weathered rocks and 0-20% of calcareous rocks according to the mass percentage, and controlling the screen residue rate of powder of 200 meshes to be less than 3%; directly granulating the powder to prepare ceramic powder particles, screening the particles to obtain graded particles, and drying the graded particles until the water content of the dried particles is 6-13 mass%; carrying out compression molding on the dried particles at a compression ratio of 0.38-0.48; and drying the obtained compressed green body, and firingthe dried compressed green body at 1100-1180 DEG C to obtain the sintered water-permeable material. The preparation method has the advantages of realization of high value-added value batch use of thepottery clay and tailings, simplicity, easiness in implementation, and facilitation of realization of industrial production; and the prepared sintered water-permeable brick can be used as a sponge city water-permeable paving material, a filter material and an adsorption material, has a flexural strength of above 4.5 MPa and a water permeability coefficient of 2 * 10<-2> cm/s, and has excellent performances.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of inferior mineral resources, in particular to a method for utilization of inferior mineral resources and preparation of novel porous materials. Background technique [0002] Pottery clay is a kind of ceramic raw material with few clay components, and it is distributed all over the country. Guizhou Province is rich in mineral resources, among which there are tens of billions of tons of clay resources of various types, mainly in northern Guizhou, Qingzhen and southwestern Guizhou. In Yuqing, Guizhou, it has been proven that the resources of clay deposits exceed 3.1 billion tons, all of which are open-pit mining. However, due to the low content of clay minerals and high content of impurity components such as high calcium and high iron in Guizhou clay ore-forming rocks, most of them have not been effectively utilized except for a very small number of them used in the cement industry. The t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/13C04B33/132C04B38/00
CPCY02P40/60
Inventor 李宇李化聪周剑飞何伟
Owner ZUNYI ENERGY & MINERAL INVESTMENT CO LTD
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