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A burn-free brick prepared from iron tailings and its preparation method

A technology for iron tailings and non-burning bricks, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of less research and achieve the effect of large consumption

Active Publication Date: 2018-05-04
BEIJING BUILDING MATERIALS ACADEMY OF SCI RES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many scholars have conducted research on the preparation of unburned bricks from coal gangue and construction waste, but there are relatively few studies on the direct preparation of unburned bricks from iron tailings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A non-burning brick prepared by using iron tailings, the raw material components of the non-burning brick include: iron tailings, alkaline activator, steel slag powder, waste and old broken tile powder and gypsum powder, the weight and number ratio of each raw material component is for:

[0043] Iron tailings 40~50

[0044] Basic activator 5~10

[0045] Steel slag powder 5~10

[0046] Waste broken tile powder 10~20

[0047] Gypsum powder 10~40.

[0048] The alkaline activator is carbide slag or sodium silicate.

[0049] The preparation method when using sodium silicate as the alkaline activator is:

[0050] A. Crush the four materials of iron tailings, steel slag powder, waste and broken ceramic tiles, and sodium silicate to less than 20mm respectively, and pass through a 10mm sieve.

[0051] B. Use a kneader to first add iron tailings, steel slag powder and waste broken tile powder into the steam heating mixing tank according to the above weight ratio, and dry mi...

Embodiment 2

[0061] Further optimization on the basis of Example 1. Sodium silicate was selected as the alkaline activator.

[0062] Crush the iron tailings, steel slag, waste and old broken ceramic tiles, and sodium silicate to less than 20mm, and pass through a 10mm sieve. , steel slag powder, and waste and old broken tile powder in proportions of 45%, 5%, and 10% (accounting for the total weight of unburned bricks) were added to the mixing tank, dry-mixed for 5 minutes, and then 10% of sodium silicate (accounted for unburned bricks) was added to the mixing tank. The ratio of the total weight of raw materials) and 30% of gypsum powder (accounting for the total weight of unburned brick raw materials) and water are added and stirred together, the moisture content of the material is controlled at 10%, the temperature of the mixing tank is heated to 110°C with steam, and wet mixed for 10 minutes , to make the mixture uniform; put the stirred slurry material into a self-made abrasive tool wi...

Embodiment 3

[0064] Further optimization on the basis of Example 1. Sodium silicate was selected as the alkaline activator.

[0065] Crush the iron tailings, steel slag, waste and old broken ceramic tiles, and sodium silicate to less than 20mm, and pass through a 10mm sieve. , steel slag powder, and waste and old broken tile powder are added to the mixing tank at a ratio of 50%, 10%, and 10% (accounting for the total weight of unburned brick raw materials), dry-mixed for 5 minutes, and then 10% sodium silicate (accounting for unburned bricks) The proportion of the total weight of raw materials) and 20% of gypsum powder (accounting for the total weight of unburned brick raw materials) and water are added and stirred together, the moisture content of the material is controlled at 10%, the temperature of the mixing tank is heated to 105°C with steam, and wet mixing is carried out for 8 minutes , to make the mixture uniform; put the stirred slurry material into a self-made abrasive tool with ...

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Abstract

The invention discloses a baking-free brick prepared from iron tailings and a preparation method of the baking-free brick. The baking-free brick is prepared from raw material components as follows: 40-50 parts of the iron tailings, 5-10 parts of an alkali activator, 5-10 parts of steel slag powder, 10-20 parts of waste broken ceramic tile powder and 10-40 parts of gypsum powder, wherein the alkali activator is carbide slag or sodium silicate, and different preparation methods are adopted when different alkali activators are used. The baking-free brick applicable to paving of an urban road is prepared from solid waste such as the iron tailings, steel slag, waste broken ceramic tiles, the carbide slag, gypsum and the like, problems about solid waste treatment in China are solved, waste can be treated with waste, land occupied by the tailings can be reduced, and resource utilization of the tailings is realized.

Description

technical field [0001] The invention relates to the field of solid waste reuse, in particular to iron tailings recycling technology, in particular to an unburned brick prepared by using iron tailings and a preparation method thereof. Background technique [0002] The steady development of my country's economy is inseparable from the pillar role of mineral resources. With the rapid development of economy and the improvement of science and technology, mineral resources are more and more developed and utilized by people, and their application scope is also wider and wider. About 70% of my country's industrial output value is occupied by basic industries and related processing industries that use mineral products as materials. However, after mining, a large number of tailings will be associated. According to incomplete statistics, the amount of tailings abandoned in the world every year has exceeded 100 billion tons. [0003] According to statistics in 2010, a quarter of my co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B18/12
CPCC04B18/12C04B28/14C04B2201/50C04B18/0481C04B18/142C04B18/165C04B22/08Y02W30/91
Inventor 李春萍黄乐
Owner BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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