Quartz sand ore tailing or silica sand ore tailing based high-strength ceramic plate and preparation method thereof

A technology of ore tailings and silica sand, which is applied in the field of high-strength ceramic plates and its preparation, can solve problems such as high sintering temperature, difficult processing, and complex raw material components, and achieve low sintering temperature, reduced maintenance costs, and comprehensive performance. Good results

Active Publication Date: 2015-04-08
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese patent with the publication number CN103570340A discloses a kind of building ceramics and its technology prepared by using industrial solid waste slag dry method. The patent uses 30-60% of ceramic polishing waste slag and industrial solid waste Ceramic raw materials and 1% to 3% ceramic additives are used to prepare building ceramics. This method does not involve the utilization of quartz sand ore tailings or silica sand ore tailings, and the composition of the raw materials is relatively complex, the processing is difficult, and the sintering temperature is also high ( 1155~1220℃)

Method used

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  • Quartz sand ore tailing or silica sand ore tailing based high-strength ceramic plate and preparation method thereof
  • Quartz sand ore tailing or silica sand ore tailing based high-strength ceramic plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Raw material ratio (mass percentage): 76% of quartz placer tailings or silica sand ore tailings, 11% of calcium carbonate, 10% of borax, and 3% of water glass.

[0032] Put the raw materials into a ball mill for ball milling, drying and sieving, take the powder between 200 and 300 mesh, mix it evenly, put it in a mold and press it into a mold, the molding pressure is 15MPa, fully dry the formed green body, put it into Sinter in a sintering furnace, the heating rate is 3°C / min, the sintering temperature is 900°C, and the temperature is kept for 0.5 hours.

[0033] The bending strength of the prepared ceramic plate is 33MPa, and the compressive strength is 210MPa. Bulk density 2.25g / cm 3 , water absorption 7.69%, acid resistance 98.76%, alkali resistance 99.13%.

Embodiment 2

[0035] Raw material ratio (mass percentage): 80% of quartz placer tailings or silica sand ore tailings, 5% of calcium carbonate, 10% of borax, and 5% of water glass.

[0036] Put the raw materials into a ball mill for ball milling, drying and sieving, take the powder between 200 and 300 meshes, mix them evenly, put them in a mold and press them for molding, the molding pressure is 20MPa, fully dry the molded green bodies, put them into Sinter in a sintering furnace, the heating rate is 5°C / min, the sintering temperature is 950°C, and the temperature is kept for 2 hours.

[0037] The bending strength of the prepared ceramic plate is 32MPa, the compressive strength is 217MPa and the volume density is 2.11g / cm 3 , water absorption 8.36%, acid resistance 98.81%, alkali resistance 99.38%.

Embodiment 3

[0039] Raw material ratio (mass percentage): 80% of quartz placer tailings or silica sand ore tailings, 10% of feldspar, 5% of borax, and 5% of water glass.

[0040] Put the raw materials into a ball mill for 3 hours, dry, sieve, take the powder between 200 and 300 mesh, mix it evenly, put it in a mold and press it into a mold, the molding pressure is 20MPa, and fully dry the molded green body. Put it into a sintering furnace for sintering, the heating rate is 5°C / min, the sintering temperature is 950°C, and the temperature is kept for 2 hours.

[0041] The bending strength of the prepared ceramic plate is 34MPa, the compressive strength is 220MPa, and the bulk density is 2.28g / cm 3 , water absorption 8.32%, acid resistance 98.54%, alkali resistance 99.29%.

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Abstract

The invention discloses a quartz sand ore tailing or silica sand ore tailing based high-strength ceramic plate and a preparation method thereof. The ceramic plate is prepared by carrying out blank making and sintering on quartz sand ore tailing and / or silica sand ore tailing, a ceramic raw material and a sintering assistant. The method has the characteristics of simple preparation technique, mild reaction conditions and low raw material cost. The prepared ceramic plate has the characteristics of high utilization ratio of the quartz sand ore tailing or silica sand ore tailing, high strength, favorable chemical stability, no water accumulation, no secondary pollution and the like. The volume density is 2.11-2.38 g / cm<3>, the water absorptivity is 7.69-8.83%, the bending strength is 32-37 MPa, the compression strength is 210-229 MPa, the acid resistance is 98.45-98.81%, and the alkali resistance is 98.78-99.38%. The ceramic plate is especially suitable to be used as a floor decoration material.

Description

technical field [0001] The invention relates to a high-strength ceramic plate with quartz sand mine tailings or silica sand mine tailings as the main raw material and a preparation method thereof, belonging to the technical field of ceramic materials. technical background [0002] Quartz placer tailings or silica sand ore tailings mainly refer to the waste residue produced during the mining process of quartz placer and silica sand ore, tailings and tailings produced during processing, of which tailings account for the vast majority. Tailings are mainly crystalline quartz aggregates with finer grain size, and the chemical composition is mainly SiO 2 , The impurity minerals are mainly clay, feldspar, mica, iron minerals, etc., and their quality varies greatly due to the quality of the raw ore and the production process. Compared with fine sand, SiO in tailings chemical composition 2 The content is obviously low, while the Al 2 o 3 , Fe 2 o 3 、TiO 2 and other impurities ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B35/622
Inventor 卢安贤俞其兵官立民李卓郑志勇罗志伟郭海彬李秀英
Owner CENT SOUTH UNIV
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