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Formula and preparation method used for medium high temperature heat storage iron ore thermophysical property reinforcement

An iron ore, medium-high temperature technology, applied in the formulation and preparation of iron ore thermophysical property strengthening, can solve the problems of low thermal conductivity, low specific heat capacity, etc., and achieve excellent thermal performance, good performance stability, and improved thermal performance Effect

Inactive Publication Date: 2019-01-11
LIAONING ZHONGMEI HIGH TEMPERATURE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with phase change materials, sensible heat materials have many advantages. For example, the heat storage system is simple, easy to operate, low cost, and the high temperature performance of sensible heat materials is stable, and the cycle life meets the application requirements. However, sensible heat materials generally have low thermal conductivity. The problem of low specific heat capacity

Method used

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  • Formula and preparation method used for medium high temperature heat storage iron ore thermophysical property reinforcement
  • Formula and preparation method used for medium high temperature heat storage iron ore thermophysical property reinforcement
  • Formula and preparation method used for medium high temperature heat storage iron ore thermophysical property reinforcement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This example provides a formula of modified iron ore for medium and high temperature heat storage, which can produce modified iron ore products with low sintering temperature and good density. In terms of mass percentage, the formula includes the following components :

[0028]

[0029] The above-mentioned preparation method of a modified iron ore for medium and high temperature heat storage comprises the following steps:

[0030] (1) Sieving the crushed and ground iron ore to obtain iron ore powder with a particle size of <300 μm;

[0031] (2) the iron ore after the step (1) sieved and diboron trioxide, silicon dioxide, aluminum sequester are uniformly mixed according to the formula quantity;

[0032] (3) Keep the mixed powder obtained in step (2) under the pressure of 400MPa for 30s, and then sinter. ℃, and keep it warm for 30 minutes, and finally raise the temperature to 800 ℃ at 10 ℃ / min, keep it warm for 2 hours, and then cool it with the furnace. The modifie...

Embodiment 2

[0034] This example provides a formula of modified iron ore for medium and high temperature heat storage, which can produce modified iron ore products with excellent thermal properties. In terms of mass percentage, the formula includes the following components:

[0035]

[0036]

[0037] The above-mentioned preparation method of a modified iron ore brick for medium and high temperature heat storage comprises the following steps:

[0038] (1) Sieving the crushed and ground iron ore to obtain iron ore powder with a particle size of <300 μm;

[0039] (2) the iron ore after the step (1) sieved and bismuth trioxide, pure aluminum, silicon dioxide, aluminum sesquioxide are uniformly mixed according to the formula quantity;

Embodiment -2

[0040] (3) Keep the mixed powder obtained in step (2) under the pressure of 400MPa for 30s, and then sinter. ℃, and keep it warm for 30 minutes, and finally raise the temperature to 850 ℃ at 10 ℃ / min, keep it warm for 2 hours, and then cool it with the furnace. The modified iron ore brick "Example-2" for medium and high temperature heat storage was obtained.

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Abstract

The invention discloses a formula and a preparation method used for medium high temperature heat storage iron ore thermophysical property reinforcement. The formula comprises, by mass, 52 to 75% of iron ore, 3 to 10% of a sintering agent, and 15 to 40% of a modifying agent. The preparation method comprises following steps: 1, iron is subjected to crushing and grinding, and sieving; 2, after sieving in step 1, iron ore is uniformly mixed with the sintering agent and the modifying agent at a formula amount; 3, a mixed powder obtained in step 2 is subjected to compacting moulding and sintering soas to obtain the iron ore heat storage material. The iron ore heat storage material is reasonable in combination, the thermal performance of the modified iron ore products is improved greatly, the specific heat capacity is increased by 25 to 50% to 0.93J / (g.K); the thermal conductivity is increased by 110 to 160% to 7.2W / (m.K); the energy storage density is increased to be 4.2J / cm3.K, and is close to that of phase change heat storage materials. The performance stability of the products at medium and high temperature is excellent; thermal circulating times reach 5000 times; the preparation method is simple and practical; the sintering temperature is low; energy consumption is reduced; the heat storage device size is small; and the industrialized application and popularization value is high.

Description

technical field [0001] The invention belongs to the research field of heat storage technology, and in particular relates to a formula and a preparation method for strengthening the thermophysical properties of iron ore used for medium-high temperature heat storage. Background technique [0002] Energy storage technology is an important part of energy science and technology, and has important economic and social significance. Energy storage is generally divided into electricity storage and heat storage technologies. Electricity storage technology is generally an energy storage technology that only appeared after the industrial revolution, especially the electric revolution. Compared with electricity storage technology, heat storage technology developed earlier. This is because in human activities, the vast majority of energy needs to be converted and utilized in the form and link of heat energy. Especially in my country, this proportion Reaching more than 90%; on the other h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/14
CPCC09K5/14Y02P20/10
Inventor 杨洪茂黎桂宝付伟
Owner LIAONING ZHONGMEI HIGH TEMPERATURE MATERIAL CO LTD
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