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Ceramic material prepared from red mud, and preparation method of ceramic material

A technology of ceramic materials and red mud, applied in the field of comprehensive utilization of solid waste resources, can solve problems such as limited, achieve the effects of good mechanical properties, low water absorption, not easy to burn and deform

Inactive Publication Date: 2016-06-22
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the latter three fields mentioned above can increase the added value of red mud utilization, their consumption is very limited compared to the field of building materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] According to the performance requirements of the formula, the weight percentage of each component is as follows: 10% red mud, 60% clay, 5% silicon-aluminum-rich raw material, namely shale, 5% quartz-based raw material, namely silica, 5% magnesium-rich raw material, namely Talc 20%, made into slurry and then spray-dried. The sprayed dry powder is pressed into shape. After drying, the moisture content of the green body is less than 1%, and it is calcined in a roller kiln. The optimum firing temperature is 1080°C and the firing time is 67 Minutes, the flexural strength of the product after firing is 108.29MPa, and the water absorption rate is 0.13%, which is an excellent ceramic material.

Embodiment 2

[0045] Ingredients are formulated according to the performance requirements of the formula. The weight percentage distribution of each component is: red mud 16%, clay 16%, silicon-aluminum-rich raw materials, shale 10%, quartz-based raw materials, that is, silica 32%, magnesium-rich raw materials, that is, Baiyun Stone 26%, made into mud and spray-dried, the sprayed dry powder is pressed into shape, after drying, the moisture content of the green body is less than 1%, and it is calcined in a roller kiln. The optimum firing temperature is 1120°C and the firing time is 45 Minutes, the flexural strength of the product after firing is 102.68MPa, and the water absorption rate is 0.36%, which is an excellent ceramic material.

Embodiment 3

[0047] According to the performance requirements of the formula, the weight percentage of each component is as follows: 20% red mud, 35% clay, 20% silicon-aluminum-rich raw material, namely fly ash, 5% quartz raw material, namely silica, after making mud Spray drying, the sprayed dry powder is pressed into shape, after drying, the moisture content of the green body is less than 1%, and it is calcined in a roller kiln. The optimum firing temperature is 1110°C, and the firing time is 38 minutes. After firing, the product is resistant to bending The strength is 95.76MPa and the water absorption rate is 0.30%. It is an excellent ceramic material.

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Abstract

The invention relates to a ceramic material prepared from red mud, and a preparation method of the ceramic material, belonging to the field of comprehensive utilization of resources of solid wastes. The ceramic material is prepared by mixing the following raw materials by mass percent: 10-70% of red mud, 0-60% of clay, 5-35% of silicon-rich aluminum raw material, 5-40% of quartz raw material and 0-30% of magnesium-rich raw material; the preparation method adopts the traditional ceramics preparation technology, and comprises the steps of crushing the raw materials, blending, grinding, granulating, molding and carrying out other technologies to form a ceramic green body, drying the ceramic green body, enabling the dried ceramic green body to enter a ceramic kiln, and firing to obtain the ceramic material product, wherein the sintering temperature is 1060-1180 DEG C, the sintering time is 35-70 minutes, the breaking strength value of the prepared ceramic material exceeds 35MPa, the water absorption value of the prepared ceramic material is less than 1%, and if a optimal ratio is adopted, the breaking strength value of the ceramic material exceeds 100MPa, and the water absorption value of the ceramic material is less than 0.5%. After the preparation method is adopted, the red mud can be used for producing general construction ceramics / ceramic sintered bricks and high-strength industrial ceramic materials; the preparation method is easy and feasible, and is beneficial to industrial production.

Description

technical field [0001] The invention relates to a ceramic material produced by using red mud and a preparation method thereof, belonging to the field of comprehensive utilization of solid waste resources. Background technique [0002] Red mud is industrial solid waste that is discharged after refining alumina from bauxite. In general, for every ton of alumina produced on average, 1.0-1.2 tons of red mud is attached. my country discharges millions of tons of red mud every year, and a large amount of red mud cannot be effectively used. It basically relies on large-scale stacking, which takes up a lot of land and causes serious pollution to the environment. [0003] The development and utilization of red mud is currently mainly in the following four fields: building materials, environmental materials, recovery of valuable metals and other composite materials. Although the above-mentioned last three fields can increase the added value of red mud utilization, their consumption i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/135C04B33/16
CPCC04B33/1322C04B33/1352C04B33/16C04B2235/321C04B2235/96Y02P40/60
Inventor 李宇裴德健张玲玲刘晓明苍大强
Owner UNIV OF SCI & TECH BEIJING
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