Red-mud coal ash baking-free brick

A technology for fly ash and non-burning bricks, which is applied in the field of building materials, can solve problems such as environmental pollution, and achieve the effects of obvious economic benefits, improved compressive strength, and cost savings.

Inactive Publication Date: 2008-06-25
LUOYANG ZHONGCHAO NEW MATERIAL SHARES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes red mud fly ash unburned bricks, the purpose of which is to solve the problem of environmental pollution caused by the stacking of red mud, the waste residue produced in the alumina production process, and to achieve resource utilization of red mud

Method used

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  • Red-mud coal ash baking-free brick

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The weight percent of its raw materials and the amount added (all ingredients are the dry material ratio of various raw materials) red mud 40, fly ash 29, aggregate 20, quicklime 10, quick gypsum 1; in the aggregate, coarse sand 10, crushed Gravel 10.

[0024] Its production process is as attached figure 1 Shown: After the above raw materials (except aggregate) are added and mixed in proportion, among them, the red mud is a wet material (about 45% of water content, and the weight is calculated after deducting the water when batching), and the others are dry materials; Chemicalization (cover the uniformly mixed material tightly with plastic cloth and let it stand for a certain period of time), add aggregate, and then roll grinding, molding (the prepared material contains 10-14% water content and is directly pressurized by a brick press), curing , to obtain products, wherein the aging time is controlled at about 24 hours, and the molding pressure is 20Mpa. According to ...

Embodiment 2

[0026] The weight percent of its raw materials and added amount (all ingredients are the dry material ratio of various raw materials) red mud 30, fly ash 20, aggregate 40, quicklime 8, quick gypsum 2; among its aggregates, coarse sand 10, crushed Gravel 30.

[0027] Its production process is the same as that of Example 1. As a result of testing, the 7d strength is 26.68Mpa, and the 28d strength is 28.90Mpa.

Embodiment 3

[0029] The weight percent of its raw materials and addition amount (all ingredients are the dry material ratio of various raw materials) red mud 22, fly ash 33, aggregate 30, quicklime 12, quick gypsum 3. Among its aggregates, there are 5 coarse sand and 25 crushed gravel.

[0030] Its production process is the same as that of Example 1. As a result of testing, the 7d strength is 23.41Mpa, and the 28d strength is 29.50Mpa.

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Abstract

The invention belongs to construction material,Which provides material components and weight percentage rate of a baking-free brick with red mud and flyash are: 22-40 of the red mud, 20-35 of the flyash, 20-40 of aggregate, 8-12 of lime and 1-3 of plaster.With the aim of realizing the largest utilization quantity of the red mud and economizing the cost, through the researches and experiments, the invention uses the red mud and the flyash as main material and uses grit and friable rubbles as the aggregate so as to facilitate compressive strength of the products; the lime and the plaster is added to improve plasticity of the blank material, strength of a semi-finished blank brick and the compressive strength of the products. The invention can satisfy the utilization performance of the products and at the same time completely can meet the national standard requirement, thus solving the problem of the environmental pollution caused by the discharge of the red mud in larger sense.

Description

technical field [0001] The invention belongs to building materials, and mainly provides a red mud fly ash non-burning brick. Background technique [0002] With the continuous development of alumina industrial production, the amount of waste residue produced in the production process—red mud has also increased significantly. The problem of stacking and disposal of red mud has become a major problem in alumina production. It not only increases the cost of production, but also occupies arable land and causes serious pollution to the environment. Therefore, the resource utilization of red mud has become an obstacle restricting the development of aluminum industry. Foreign countries generally use sea discharge to dispose of red mud. Domestic enterprises are all inland, and the cost of ocean disposal is too high. Although there are many studies on the utilization of red mud resources, including preparation of cement, production of ceramics, plastic fillers, etc. Small or high pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/30C04B18/08C04B22/06C04B22/14C04B14/06C04B14/02
CPCC04B2111/00017C04B28/021Y02W30/91
Inventor 裴广斌吴建华陈伟秦新新
Owner LUOYANG ZHONGCHAO NEW MATERIAL SHARES CO LTD
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