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Preparation method of red mud iron reduction furnace slag light foamed ceramic and iron reduction furnace

A technology of lightweight foam and reduction furnace, applied in ceramic products, improvement of process efficiency, application, etc., can solve problems such as waste, low added value, serious environmental pollution, etc., to reduce production costs, save energy, and reduce environmental pollution Effect

Inactive Publication Date: 2012-06-20
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Industrial waste red mud is a waste produced during aluminum smelting and industrial alumina production, which seriously pollutes the environment, and there is no effective treatment method in the world
At present, sintering method or Bayer red mud is mainly used as refractory materials, cement or various fillers, but due to poor product performance, high production cost and low added value, it cannot be widely used.
In addition, the above-mentioned red mud contains a large amount of iron, and if it is treated according to the above method, it will cause a lot of waste because the iron cannot be recovered.

Method used

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  • Preparation method of red mud iron reduction furnace slag light foamed ceramic and iron reduction furnace
  • Preparation method of red mud iron reduction furnace slag light foamed ceramic and iron reduction furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Ingredients: 35% of red mud, 15% of raw coke gemstones, 10% of waste glass powder, 15% of quartz sand, 20% of coal gangue, 5% of titanium dioxide, and mix them evenly to make a mixture. Among them, the iron of red mud The content is 8%;

[0025] (2) Preparation of foaming agent: magnesium carbonate, water glass and waste glass powder are uniformly mixed at a weight ratio of 60:20:20, dried and fired at 700°C for 1 hour, and then ground to a fine particle size of 10 μm;

[0026] (3) Smelting reduction: The above-mentioned mixture plus 1% coal powder is fully mixed and fully reduced in a reducing atmosphere at a temperature of 1200°C, and then the briquettes are put into the molten pool 2 in the iron reduction furnace 1 through the feeder 5, The temperature is 1550°C, the atmosphere is an oxidizing atmosphere, and the briquette sinks below the liquid level of the slag melt and melts. The height h2 of the bottom is used to control the feeding speed of the feeder 5, so...

Embodiment 2

[0032] (1) Ingredients: 58% red mud, 9% raw coke gemstones, 7% waste glass powder, 8% quartz sand, 15% coal gangue, 3% titanium dioxide, and mix them evenly to make a mixture. Among them, iron in red mud The content is 24%;

[0033] (2) Preparation of foaming agent: Magnesium carbonate, calcium carbonate, water glass and waste glass powder are uniformly mixed in a weight ratio of 40:35:12:13, dried and fired at 550°C for 2 hours, and then ground to a fine particle size of Made of 15μm;

[0034] (3) Smelting reduction: The above-mentioned mixture plus 3% coal powder is fully mixed and fully reduced in a reducing atmosphere at a temperature of 1100°C, and then put into the molten pool 2 in the iron reduction furnace 1 through the feeder 5 briquetting, The temperature is 1600°C, the atmosphere is an oxidizing atmosphere, and the briquette sinks below the liquid level of the slag melt and melts. The height h2 of the bottom is used to control the feeding speed of the feeder 5, so...

Embodiment 3

[0040] (1) Ingredients: 82.5% red mud, 3% raw coke gemstones, 3% waste glass powder, 1% quartz sand, 10% coal gangue, 0.5% titanium dioxide, and mix them evenly to make a mixture. Among them, iron in red mud The content is 40%;

[0041] (2) Preparation of foaming agent: Calcium carbonate, calcium sulfate, magnesium carbonate, magnesium sulfate, water glass and waste glass powder are evenly mixed in a weight ratio of 20:20:20:30:5:5, and then dried and kept at 400°C Fired for 3 hours, then ground to a fine particle size of 20 μm;

[0042] (3) Smelting reduction: the above mixture plus 5% coal powder is fully mixed and fully reduced in a reducing atmosphere at a temperature of 1200 ° C, and then put into the molten pool 2 in the iron reduction furnace 1 through the feeding machine 5 briquetting , the temperature is 1650 ° C, the atmosphere is an oxidizing atmosphere, the briquette sinks below the liquid level of the slag melt and melts, and the distance between the upper surfac...

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Abstract

The invention discloses a preparation method of red mud iron reduction furnace slag light foamed ceramic and an iron reduction furnace. A red mud iron reduction furnace is characterized by comprising an iron reduction furnace 1, a melting bath 2, a furnace slag melting bath 3, a molten iron melting bath 4, a feeding machine 5, a molten iron channel 6, a molten iron inlet 7, a furnace slag melt outlet 8, a furnace slag melt channel 9, a furnace slag melt feeding hole 10, a foaming agent inlet 11, a stirring machine 12, a float glass kiln body 13, a foaming section 14, a foam stabilizing section 15 and an annealing section 16; red mud is taken as a main material, and green coke precious stone, waste glass dust, quartz sand, coal gangue and titanium dioxide are added; and the ceramic consists of the following components in percentage by weight: 35-82.5 percent of red mud, 3-15 percent of green coke precious stone, 3-10 percent of waste glass dust, 1-15 percent of quartz sand, 10-20 percent of coal gangue and 0.5-5 percent of titanium dioxide. Industrial waste is taken as a major raw material, so that production cost is reduced, environmental pollution is lowered, and economic efficiency and environmental friendliness are realized; waste can be recycled; and a prepared red mud iron reduction furnace slag light foamed ceramic tile has high strength, high heat preserving property and high decorating characteristic.

Description

technical field [0001] The invention relates to a preparation method of red mud iron reduction slag lightweight foam ceramics and an iron reduction furnace, which belong to the technical field of building ceramic preparation technology. Background technique [0002] Red mud iron reduction slag lightweight foam ceramics are mainly used in interior and exterior walls and insulation materials. At present, ceramic floor tiles, polished tiles, and marble slabs are widely used, which are building decoration materials that consume natural resources and have high manufacturing costs. [0003] Industrial waste red mud is a waste produced during aluminum smelting and industrial alumina production, which seriously pollutes the environment, and there is no effective treatment method in the world. At present, sintering method or Bayer red mud is mainly used as refractory material, cement or various fillers, but due to poor product performance, high production cost and low added value, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C21B13/00
CPCY02P10/20
Inventor 唐竹兴王洪忠李国昌
Owner SHANDONG UNIV OF TECH
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