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Production method of red mud filler

A production method, red mud technology, applied in fibrous filler, dyeing physical treatment, dyeing low-molecular organic compound treatment, etc., can solve the problems of particle size not meeting the requirements, high iron content in powder, dust pollution, etc. Achieve the effect of low production cost, less environmental pollution and no secondary pollution

Active Publication Date: 2014-01-01
山东绿生洁环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the powder obtained by using the process of this invention is only 600-800 mesh, the particle size cannot meet the requirements, the production process is long, and the efficiency is low; the powder obtained after baking is high in energy consumption, and the powder obtained after grinding High iron content and dust pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The grinder used in this example adopts the wet method vertical stirring grinder produced by Kunshan Miyou Crushing Equipment Co., Ltd.; the flash dryer adopts the XSG series rotary flash dryer produced by Changzhou Maijieke Drying Equipment Co., Ltd.; The CM type impact ultra-fine grinding machine produced by the Powder Engineering Center of Xianyang Non-metallic Mineral Research and Design Institute; the classifier adopts the FW series airflow classifier produced by Qingdao Micron Powder Technology Equipment Co., Ltd.; the modification machine adopts Qingdao Zhongyi PSC powder surface modification machine equipped with heating device and spray nozzle produced by Machinery Equipment Co., Ltd.

[0021] (1) Wet grinding: send the 80-120 mesh coarse red mud slurry from the red mud classification process into the grinder, and perform wet grinding to 1250-5000 mesh to obtain fine red mud slurry;

[0022] (2) Dehydration: Put the fine red mud slurry into a plate and frame fi...

Embodiment 2

[0028] The equipment is the same as in Example 1.

[0029] (1) Wet grinding: send the 80-120 mesh coarse red mud slurry from the red mud classification process into the grinder, and perform wet grinding to 1250-5000 mesh to obtain fine red mud slurry;

[0030] (2) Dehydration: Put the fine red mud slurry into a plate and frame filter press for press dehydration, and press it into a red mud filter cake with a water content of less than 25%; the temperature of the press filter is normal temperature, and the pressure is 0.6-0.8 MPa;

[0031] (3) Drying: send the filter cake into a flash dryer for pulverization and drying, the drying temperature is 500°C, and the drying time is 25 minutes to obtain a powder with a moisture content of less than 0.5%;

[0032] (4) Grinding: the powder is ultrafinely ground using an impact ultrafine pulverizer to obtain ultrafine powder of 1250 to 6000 mesh;

[0033] (5) Classification: adopt a classifier to classify the superfine mill discharge to...

Embodiment 3

[0036] The equipment is the same as in Example 1.

[0037] (1) Wet grinding: send the 80-120 mesh coarse red mud slurry from the red mud classification process into the grinder, and perform wet grinding to 1250-5000 mesh to obtain fine red mud slurry;

[0038] (2) Dehydration: Put the fine red mud slurry into a plate and frame filter press for press dehydration, and press it into a red mud filter cake with a water content of less than 25%; the temperature of the press filter is normal temperature, and the pressure is 0.6-0.8 MPa;

[0039] (3) Drying: send the filter cake into a flash dryer for pulverization and drying, the drying temperature is 600°C, and the drying time is 20 minutes to obtain a powder with a moisture content of less than 0.5%;

[0040] (4) Grinding: the powder is ultrafinely ground using an impact ultrafine pulverizer to obtain ultrafine powder of 1250 to 6000 mesh;

[0041] (5) Classification: adopt a classifier to classify the superfine mill discharge to...

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PUM

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Abstract

The invention discloses a production method of red mud filler. The method includes the steps of: (1) wet levigation: sending a coarse red mud slurry from a red mud grading process into a grinding machine, conducting wet levigation to obtain a fine red mud slurry; (2) dehydration: bringing the fine red mud slurry into plate-and-frame filter press to press it into a red mud filter cake with a water content of less than 25%; (3) drying: sending the filter cake into a flash dryer to carry out crushing and drying so as to obtain powder with a water content of less than 0.5%; (4) grinding: subjecting the powder to superfine grinding in an impact type superfine powder mill to obtain 1250-6000 mesh superfine powder; (5) grading: grading the superfine ground material by a grader to obtain fine powder; and (6) modification: putting the fine powder into a modification machine, adding a modifier by spraying, and carrying out heat preservation reaction for 20-30min. The method provided in the invention realizes integration of material superfine processing and surface modification, simplifies the process, and no leakage exists in the production process. The method has the advantages of less environmental pollution, fast speed, high efficiency, environmental protection and energy saving, and no secondary pollution.

Description

technical field [0001] The invention relates to the technical field of red mud processing, production and reuse, in particular to a process for producing plastic fillers by using red mud. Background technique [0002] Red mud is the insoluble residue discharged after extracting alumina from bauxite in the alumina industry, that is, the solid waste generated during the production of alumina using bauxite as raw material. These slags are reddish-brown because they are rich in iron oxide. They are called red mud slags, which are hazardous solid wastes. The lower the grade of raw materials, the greater the amount of red mud produced. Its main component is SiO 2 、Al 2 o 3 , CaO, Fe 2 o 3 Wait. With different raw materials and process conditions, the names of red mud are also different, including Bayer red mud, sintering red mud, and combined red mud. In the alumina industry, about 1.2 to 1.8 tons of red mud are produced for every ton of alumina produced. The world’s alumina...

Claims

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Application Information

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IPC IPC(8): C09C1/40C09C3/04C09C3/08C09C3/12
Inventor 张釜维王立通
Owner 山东绿生洁环保科技有限公司
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