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Preparation method of breakable red mud ceramic

An easy-to-pulverize, red mud technology, applied in the production of ceramic materials, clay products, applications, etc., can solve the problems of high strength of sintered products, few research reports, low economic value, etc. low effect

Active Publication Date: 2018-01-23
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conventional calcination method is easy to sinter the red mud, and the sintered product has high strength, is not easy to break, and has low economic value. Therefore, the application of red mud in the field of roadbed backfill is very limited.
The development of a method for preparing easily crushed red mud ceramics can effectively solve the above problems, but there are very few related research reports in this area

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Ingredients according to mass percentage: 65% red mud and 35% bauxite powder, the main components of red mud include: 33.27% Fe 2 o 3 , 24.0% Al 2 o 3 , 17.8% SiO 2 , 13.9% Na 2 O, 6.49% TiO 2 , 2.62% CaO, 0.703% SO 3 , 0.282%P 2 o 5 , 0.197% MgO, 0.193% ZrO 2 , 0.165% Cr 2 o 3 , 0.142% Cl, 0.128% K 2 O, 0.0717% MnO, 0.0224% NiO and 0.0159% PbO, after adding water and mixing according to the ratio of water to material 80:100, ball milled on a fast ball mill for 15 minutes;

[0016] (2) Dry the slurry ground in step (1) at 130°C for 1 hour, then crush the dried raw material and sieve it to obtain powder, and then manually manufacture granules;

[0017] (3) Put the granules prepared in step (2) into a mold and mold them at 200 MPa to obtain a red mud ceramic green body. After drying the green body, apply glaze on its surface. The main component of the glaze is Comprising: 47.36% SiO 2 , 24.37% Al 2 o 3 , 6.67% BaO, 4.57% CaO, 3.65% B 2 o 3 , 3.40%K ...

Embodiment 2

[0019] (1) Ingredients according to mass percentage: 80% red mud and 20% bauxite powder, the main components of red mud include: 33.27% Fe 2 o 3 , 24.0% Al 2 o 3 , 17.8% SiO 2 , 13.9% Na 2 O, 6.49% TiO 2 , 2.62% CaO, 0.703% SO 3 , 0.282%P 2 o 5 , 0.197% MgO, 0.193% ZrO 2 , 0.165% Cr 2 o 3 , 0.142% Cl, 0.128% K 2 O, 0.0717% MnO, 0.0224% NiO and 0.0159% PbO, after adding water and mixing according to the ratio of water to material 80:100, ball milled on a fast ball mill for 15 minutes;

[0020] (2) Dry the slurry ground in step (1) at 130°C for 1 hour, then crush the dried raw material and sieve it to obtain powder, and then manually manufacture granules;

[0021] (3) Put the granules prepared in step (2) into a mold and mold them at 200 MPa to obtain a red mud ceramic green body. After drying the green body, apply glaze on its surface. The main component of the glaze is Comprising: 47.36% SiO 2 , 24.37% Al 2 o 3 , 6.67% BaO, 4.57% CaO, 3.65% B 2 o 3 , 3.40%K ...

Embodiment 3

[0023] (1) Ingredients according to mass percentage: 90% red mud and 10% bauxite powder, the main components of red mud include: 33.27% Fe 2 o 3 , 24.0% Al 2 o 3 , 17.8% SiO 2 , 13.9% Na 2 O, 6.49% TiO 2 , 2.62% CaO, 0.703% SO 3 , 0.282%P 2 o 5 , 0.197% MgO, 0.193% ZrO 2 , 0.165% Cr 2 o 3 , 0.142% Cl, 0.128% K 2 O, 0.0717% MnO, 0.0224% NiO and 0.0159% PbO, after adding water and mixing according to the ratio of water to material 80:100, ball milled on a fast ball mill for 15 minutes;

[0024] (2) Dry the slurry ground in step (1) at 130°C for 1 hour, then crush the dried raw material and sieve it to obtain powder, and then manually manufacture granules;

[0025] (3) Put the granules prepared in step (2) into a mold and mold them at 200 MPa to obtain a red mud ceramic green body. After drying the green body, apply glaze on its surface. The main component of the glaze is Comprising: 47.36% SiO 2 , 24.37% Al 2 o 3 , 6.67% BaO, 4.57% CaO, 3.65% B 2 o 3 , 3.40%K ...

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Abstract

The invention provides a preparation method of a breakable red mud ceramic and belongs to the technical field of solid waste recycling. The preparation method comprises the following steps: firstly, taking materials according to the following mass percentage: 65 to 90 percent of red mud and 10 to 35 percent of bauxite powder; then adding water for mixing according to the ratio of water to materials being 80:100, carrying out ball milling on a fast ball mill for 15 minutes, and drying the obtained slurry at the temperature of 130 DEG C for 1 hour; crushing the dried raw materials and passing through a sieve to obtain powder, preparing pellets by using a manual method, putting the prepared pellets into a mold and carrying out compression molding at the pressure of 200 MPa to obtain a red mudceramic green body; drying the green body and applying glaze to the surface of the green body; finally, putting the green body into a roller kiln and firing at the temperature of 1170 DEG C, whereinthe firing period is 45 minutes, thus obtaining the breakable red mud ceramic. The method has the advantage of simple process flow, low price of raw materials and short production cycle and facilitation for industrialized production. The prepared red mud ceramic is easy to crush; breccia-like particles can be obtained by carrying out a simple crushing process for treatment.

Description

technical field [0001] The invention provides a method for preparing easily crushed red mud ceramics, which belongs to the technical field of solid waste recycling. Background technique [0002] Red mud is a by-product produced in the alumina production process, and 1-2 kg of red mud will be produced for every 1 kg of alumina produced. The annual output of alumina in the world is very high. In 2015, China alone produced millions of tons of alumina. Based on this, it is estimated that the annual discharge of red mud is very large. Therefore, the development of red mud recycling technology has attracted extensive attention. . Due to the fine particle size of red mud, high alkalinity, easy dissolution, and heavy metal substances, simple landfill and accumulation will cause water pollution and soil pollution. These factors make it difficult to directly recycle red mud. At present, the application of red mud as a raw material to fill roadbeds, produce foam insulation materials ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/34C03C8/00
CPCY02P40/60
Inventor 李成峰王文浩张伟姚奇恒袁飞张辉
Owner SHANDONG UNIV OF TECH