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Ceramic-based heat-storage material based on iron tailings and preparation method of same

A heat storage material and iron tailings technology, applied in the field of ceramic-based heat storage, can solve the problem of not showing resource advantages, and achieve the effects of solving the accumulation of land occupation and polluting the environment, high erosion resistance, and preventing loss.

Inactive Publication Date: 2017-10-24
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the composition, mineral phase and structural characteristics of iron tailings are not considered, the products developed based on iron tailings do not reflect the resource advantages of this raw material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A ceramic-based heat storage material based on iron tailings and a preparation method thereof. The preparation method of this embodiment is:

[0041] The first step, 40~50wt% iron tailings, 30~40wt% Al 2 (SO 4 ) 3 18H 2 O, 0.1-1wt% lanthanum oxide powder, and 10-20wt% anhydrous oxalic acid are mixed, and ground at room temperature for 0.5-2 hours to obtain the abrasive.

[0042] In the second step, 20~30wt% Al(NO 3 ) 3 9H 2 O, the potassium nitrate of 40~50wt%, the cobalt powder of 10~20wt%, the manganese powder of 10~20wt% and the germanium powder of 10~20wt% are mixed uniformly, press molding under the condition of 50~100MPa, in nitrogen atmosphere and 400 Heat treatment at ~500°C for 0.5-1 hour, pulverize, ball mill, dry at 90°C for 12 hours, and sieve to obtain sieve material A with a particle size of 0.088-1mm and sieve material B with a particle size of less than 0.088mm.

[0043] The third step is to mix 20~30wt% of grinding material, 20~30wt% of sieving ...

Embodiment 2

[0046] A ceramic-based heat storage material based on iron tailings and a preparation method thereof. The preparation method of this embodiment is:

[0047] In the first step, 45~55wt% iron tailings, 20~30wt% Al(NO 3 ) 3 9H 2 O. Mix 1-5wt% zirconia powder and 20-30wt% citric acid monohydrate, and grind for 0.5-2 hours at room temperature to obtain the abrasive.

[0048] In the second step, 30~40wt% Al 2 (SO 4 ) 3 18H 2 O, the sodium nitrate of 30~40wt%, the cobalt powder of 10~20wt%, the manganese powder of 10~20wt% and the germanium powder of 10~20wt% are mixed uniformly, under the condition of 50~100MPa compression molding, in argon atmosphere and Heat treatment at 500-600°C for 1-3 hours, pulverize, ball mill, dry at 90°C for 12 hours, and sieve to obtain sieve material A with a particle size of 0.088-1mm and sieve material B with a particle size of less than 0.088mm.

[0049] The third step is to mix 30~40wt% of grinding material, 20~30wt% of sieving material A, 20...

Embodiment 3

[0052] A ceramic-based heat storage material based on iron tailings and a preparation method thereof. The preparation method of this embodiment is:

[0053] The first step, 50~60wt% iron tailings, 20~30wt% Al 2 (SO 4 ) 3 18H 2 O, 5-10wt% zirconia powder and 10-20wt% citric acid monohydrate are mixed, and ground at room temperature for 0.5-2 hours to obtain the abrasive.

[0054] In the second step, 20~30wt% Al 2 (SO 4 ) 3 18H 2 O, the sodium nitrate of 30~40wt%, the cobalt powder of 20~30wt%, the manganese powder of 10~20wt% and the germanium powder of 10~20wt% are mixed uniformly, under the condition of 50~100MPa compression molding, in nitrogen atmosphere and 400 Heat treatment at ~500°C for 0.5-1 hour, pulverize, ball mill, dry at 90°C for 12 hours, and sieve to obtain sieve material A with a particle size of 0.088-1mm and sieve material B with a particle size of less than 0.088mm.

[0055] The third step is to mix 40~50wt% of grinding material, 10~20wt% of sieving...

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Abstract

The invention relates to a ceramic-based heat-storage material based on iron tailings and a preparation method of same. In a technical scheme, the method includes the steps of: 1) mixing the iron tailings, aluminum salt, a stabilizing agent and a complexing agent and grinding the mixture to obtain a ground material; 2) uniformly mixing the aluminum salt, an inorganic salt, cobalt powder, manganese powder and germanium powder, press-shaping the mixture, thermally treating the mixture in a neutral atmosphere at 400-600 DEG C, ball-milling the mixture, and drying and sieving the mixture to obtain a sieved material A with granularity being 0.088-1 mm and a sieved material B with granularity being less than 0.088 mm; 3) uniformly mixing 20-50 wt% of the ground material, 10-30 wt% of the sieved material A, 20-40 wt% of the sieved material B and 5-10 wt% of the inorganic salt, press-shaping the mixture, and thermally treating the mixture in a neutral atmosphere at 400-600 DEG C to produce the ceramic-based heat-storage material based on iron tailings. The preparation method has plenty sources of raw materials, is low in production cost and has simple process. The material is high in heat storage density and heat conductivity, and is excellent in compression strength and thermal shock resistance.

Description

technical field [0001] The invention belongs to the technical field of ceramic-based heat storage. In particular, it relates to a ceramic-based heat storage material based on iron tailings and a preparation method thereof. Background technique [0002] Heat storage material is a new type of functional material that is widely used at present. It is mainly used in the fields of industrial waste / waste heat recovery and utilization, comprehensive development of solar energy, and high temperature energy saving. It mainly includes sensible heat storage materials and latent heat storage materials. The heat storage material belongs to the sensible heat storage material, and the refractory material is used as the main body to absorb heat. Since the heat absorption only depends on the change of the sensible heat capacity of the refractory material, this heat storage material has the advantages of large volume, high cost, large thermal inertia and output Disadvantages such as gradual...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 王周福桂舜刘浩王玺堂马妍
Owner WUHAN UNIV OF SCI & TECH
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