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A microcrystalline foam material prepared from iron tailings and its manufacturing method

A technology of microcrystalline foaming and iron tailings, which is used in the production of ceramic materials, ceramic products, clay products, etc., can solve the problems of low compressive strength, low water absorption, thermal stability, low utilization rate of iron tailings, and few types of raw materials. , to achieve the effects of good thermal stability, easy industrialization, and fewer types of raw materials

Active Publication Date: 2021-07-02
河北恒钏建筑材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention application has a low utilization rate of iron tailings, too many types of raw materials, and the compressive strength of the obtained product is only 7-10MPa, which is low.
[0006] At present, there is no method in my country that can effectively consume a large amount of iron tailings with fewer types of raw materials, and the obtained materials have the advantages of high compressive strength, uniform pores, low water absorption, and good thermal stability.

Method used

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  • A microcrystalline foam material prepared from iron tailings and its manufacturing method
  • A microcrystalline foam material prepared from iron tailings and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation:

[0043] (1) Pulverization: Carry out preliminary pulverization to raw material;

[0044](2) Ball milling: ball mill the raw materials after preliminary crushing for 13 minutes, and the speed of the ball mill is 20rpm, and sieve; iron tailings are sieved through a 325 mesh sieve; silicon carbide is sieved through a 325 mesh sieve; boron nitride is sieved through a 325 mesh sieve Screening; magnesium oxide is screened through a 600-mesh sieve; calcium chloride is screened through a 600-mesh sieve

[0045] (3) Batching: batching is carried out according to the mass percentage requirements, stirring, and the stirring speed is 100rpm;

[0046] (4) Granulation: Transport the prepared raw materials to the granulation tower, atomize and humidify, and atomize and humidify to a humidity of 11%, heat up and dry to 250°C, and heat up and dry to obtain granulated powder;

[0047] (5) Firing forming: Distribute the granulated powder into a box-shaped mold through an a...

Embodiment 2

[0051] Preparation:

[0052] (1) Pulverization: Carry out preliminary pulverization to raw material;

[0053] (2) Ball milling: ball mill the raw materials after preliminary crushing for 18 minutes, and the speed of the ball mill is 18rpm, and sieve; iron tailings are sieved through a 325 mesh sieve; silicon carbide is sieved through a 400 mesh sieve; boron nitride is sieved through a 400 mesh sieve Screening; magnesium oxide is screened through a 500-mesh sieve; calcium chloride is screened through a 500-mesh sieve

[0054] (3) Batching: carry out batching according to mass percentage requirement, stir, and stirring speed is 150rpm;

[0055] (4) Granulation: Transport the prepared raw materials to the granulation tower, atomize and humidify, and atomize and humidify to a humidity of 11%, heat up and dry to 180°C, and heat up and dry to obtain granulated powder;

[0056] (5) Firing forming: Distribute the granulated powder into a box-shaped mold through an automatic distribu...

Embodiment 3

[0060] Preparation:

[0061] (1) Pulverization: Carry out preliminary pulverization to raw material;

[0062] (2) Ball milling: ball mill the raw materials after preliminary crushing for 15 minutes, and sieve the ball mill at a speed of 19 rpm; iron tailings are sieved through a 325 mesh sieve; silicon carbide is sifted through a 350 mesh sieve; boron nitride is sieved through a 400 mesh sieve Screening; magnesium oxide is screened through a 550-mesh sieve; calcium chloride is screened through a 500-mesh sieve

[0063] (3) Batching: carry out batching according to mass percentage requirement, stir, and stirring speed is 150rpm;

[0064] (4) Granulation: Transport the prepared raw materials to the granulation tower, atomize and humidify, and atomize and humidify to a humidity of 11%, heat up and dry to 200°C, and heat up and dry to obtain granulated powder;

[0065] (5) Firing forming: Distribute the granulated powder into a box-shaped mold through an automatic distributing m...

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Abstract

The present application relates to a method for preparing microcrystalline foamed material by utilizing iron tailings. In parts by weight, the raw material is composed of a foaming agent, auxiliary materials, and the balance of iron tailings. It is prepared through the steps of pulverization, ball milling, batching, granulation, and sintering. Experimental tests show that the material preparation method of the present invention can effectively consume a large amount of iron tailings, and the obtained material has the advantages of high compressive strength, uniform pores, low water absorption, and good thermal stability.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of iron tailings resources and materials, and in particular relates to a method for preparing microcrystalline foaming materials from iron tailings. Background technique [0002] Iron tailings are the waste after mineral processing and are the main component of industrial solid waste. According to incomplete statistics, more than 10 billion tons of tailings and waste rocks are discharged in the world every year. At present, there are more than 8,000 state-owned mines and more than 110,000 township collective mines in China, with a stockpiled tailings volume of nearly 5 billion tons and an annual discharge of more than 500 million tons of tailings, of which the annual discharge of ferrous metallurgical mines reaches 1.5 million tons. Faced with such a large amount of iron tailings, my country's comprehensive utilization rate is only 7%, and the stockpiled iron tailings are as high as more...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/02C04B33/132
CPCY02P40/60
Inventor 鲍艳华简军张文俭池宗鹏
Owner 河北恒钏建筑材料有限公司