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Composite heat storage material based on steel slag-coal gangue and preparation method thereof

A technology of composite heat storage material and coal gangue, which is applied in the direction of heat exchange materials, ceramic material production, chemical instruments and methods, etc., can solve environmental protection and energy problems, environmental pollution, land occupation and other problems, and achieve low cost and reduction Cost, wide range of effects

Active Publication Date: 2021-10-19
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in general, it is still far from meeting the needs of the industry for the treatment of these wastes. At the same time, improper treatment will cause new environmental protection and energy problems.
For example, the filling treatment of steel slag not only causes a waste of resources, but also occupies a large amount of land untreated steel slag, forming a new environmental pollution problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Adding steel slag for adding modified materials, sintering aids, coal gangue composites:

[0031] (1) Use the crusher to separate the steel slag, coal gangue, silicon powder, kaolin, zirconia, and screen according to the desired particle size using the sieve of the corresponding number of visits, and the larger particle size powder of the screen can be in the mortar. Ball milling is carried out using a ball mill for ball milling, continuing to refine until a particle size requirement is met, and the sieve screen is reused, and the sample powder required to obtain the desired particle size. Each powder is then placed in an oven at 100 ° C for 8 h.

[0032] (2) Taking the mass fraction, it is weighed, and after drying, 45 parts of the powder particle diameter of <10 μm, 40 parts of the powder particle diameter of <5 μm, silicon powder 3 of the powder particle size <1 μm 3 Part, kaolin, 3 zirconia, sintering aid, 3 parts of gratis oxide, 1 boron oxide, 3 parts of titanium oxid...

Embodiment 2

[0036] Adding steel slag for adding modified materials, sintering aids, coal gangue composites:

[0037] (1) Use the crusher to screened steel slag, coal gangue, silicon powder, kaolin, alumina, and use the sieve of the respective number of meshes according to the required particle size, and the larger particle size powder of the screen can be in the mortar. Ball milling is carried out using a ball mill for ball milling, continuing to refine until a particle size requirement is met, and the sieve screen is reused, and the sample powder required to obtain the desired particle size. Each powder is then placed in an oven at 120 ° C for 8 h.

[0038] (2) Taking the mass fraction, 35 parts of the steel slag of the powder particle diameter of <10 μm, 50 parts of the powder particle size of 5 μm, 3 parts of the powder particle size of <1 μm, 3 parts of the powder particle size of <1 μm, 4 parts of kaolin, 3 alumina, sintering aid 2 parts of zinc oxide, 2 parts of titanium oxide, 1 barium...

Embodiment 3

[0042] Adding steel slag for adding modified materials, sintering aids, coal gangue composites:

[0043] (1) Use the crusher to screened steel slag, coal gangue, silicon powder, alumina, zirconia, and use the sieve of the corresponding number of meshes using the desired granularity, and the sieved large particle size powder can be in the mortar The polishing is carried out or the ball mill is used for ball milling, continuing to refine until the particle size requirements are met, and the screen screen is reused, and the sample powder required for the required particle size is obtained. Each powder is then placed in an oven at 120 ° C for 8 h.

[0044] (2) After the mass fraction, 45 parts of steel slag after the powder particle size of <10 μm, 45 parts of the powder particle size of <5 μm, 2 parts of the powder particle size of <1 μm, 2 parts, 2 parts of alumina, 2 zirconia, 2 parts of titanium oxide, 1 corrurium oxide, 1 part of cerium oxide, and mixed with mixing until mixed un...

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Abstract

The invention relates to a composite heat storage material based on steel slag-coal gangue and a preparation method thereof. The heat storage material comprises the following components in percentage by mass: 35-45% of steel slag, 40-50% of coal gangue, 0-10% of a sintering aid and 0-10% of a modifier. According to the invention, after the raw materials are subjected to the procedures of crushing, grinding, mixing, compression molding, sintering and the like, the obtained heat storage material is high in strength, the specific heat capacity is 1.1-1.3 J / g.DEG C, the heat conductivity is 2-3 W / m.K, and the cost is only 1 / 3 of that of a current marketized heat storage material; the heat storage material is wide in application range, low in cost, safe, reliable, long in service life, and simple in related preparation process, special process and equipment requirements do not exist, and further industrial production can be realized; and industrial wastes such as steel slag, coal gangue and the like are fully utilized in the formula, so that the environmental pollution caused by the solid wastes and the like can be greatly relieved, and the resource utilization of the solid wastes is realized.

Description

Technical field [0001] The present invention relates to a formulation and preparation method of preparing hot waste material steel slag, coal gangue, belonging to the technical field of energy and energy-saving energy-saving materials. Background technique [0002] Energy and environmental issues are the main problems faced by current social development, involving energy conversion and utilization. As the main way of energy storage and utilization, heat storage technology has played a crucial role in the input of energy inputs and outputs. [0003] In China, in three main heat storage forms, only the thermal technology has been widely produced and used in industrial, such as latent heat and thermochemistry, are not yet mature. The thermal storage heat is mainly used to achieve heat storage with temperature changes with temperature changes. The heat storage process and apparatus of the thermal heat storage process and the device can achieve heat storage phase intensity and propert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/14
CPCC09K5/14Y02P40/60
Inventor 马慧博马士平李宝让李文瀚
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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