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A kind of heat exchanger ceramic material for intensive flue-cured tobacco room and its preparation method

A technology of ceramic materials and heat exchangers, which is applied in the field of ceramic materials and its preparation for heat exchangers used in dense flue-cured tobacco rooms, can solve the problems of poor thermal shock resistance, low expansion, thermal stability, etc., and achieve good thermal shock resistance , high temperature creep performance, high density effect

Inactive Publication Date: 2011-12-14
湖北省烟叶公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of alumina ceramics as heat exchangers is their poor thermal shock resistance, but this can be compensated by introducing materials with low expansion and good thermal stability

Method used

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  • A kind of heat exchanger ceramic material for intensive flue-cured tobacco room and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing a heat exchanger ceramic material for a dense flue-cured room, comprising the steps of:

[0026] 1) Preparation of batch materials: according to the mass percentages of each raw material in the batch materials: Yuanan soil 15%, bauxite 40%, purple wood knot 38%, wollastonite 2%, talc 5%, select Yuanan soil, bauxite, purple wood knot, wollastonite and talc;

[0027] The said Yuan'an soil is the soil of Yuan'an County, Hubei Province.

[0028] The dispersant is hexametaphosphoric acid.

[0029] The raw material source used in the present invention and main chemical composition are shown in Table 1:

[0030] The chemical composition (mass percentage composition) of each raw material of table 1

[0031] chemical components

SiO 2

Al 2 o 3

MgO

CaO

Fe 2 o 3

TiO 2

Loss on ignition

place of origin

Yuan Antu

46.23

41.78

0.11

0.19

0.20

0.20

11.29

Hub...

Embodiment 2

[0042] A method for preparing a heat exchanger ceramic material for a dense flue-cured room, comprising the steps of:

[0043] 1) Preparation of batch materials: According to the mass percentages of each raw material in the batch materials: Yuanan soil 10%, bauxite 50%, purple wood knot 34%, wollastonite 1%, talc 5%, select Yuanan soil, bauxite, purple wood knot, wollastonite and talc;

[0044] The Yuan'an soil, bauxite, purple wood knot, wollastonite and talc are all ground in a ball mill with water, dried and passed through a 300-mesh sieve, and then mixed to obtain batch materials;

[0045] Described Yuan'an soil is the soil of Yuan'an County, Hubei Province;

[0046] Described dispersant is hexametaphosphoric acid;

[0047] 2) Preparation of slurry: according to the mass percentage of each component: batch material 64.25%, water 35%, dispersant 0.75%, select batch material, water and dispersant; add water and dispersant to the batch material in a ball mill Ball milling ...

Embodiment 3

[0053] A method for preparing a heat exchanger ceramic material for a dense flue-cured room, comprising the steps of:

[0054] 1) Preparation of batch materials: according to the mass percentages of each raw material in the batch materials: Yuanan soil 14%, bauxite 33%, purple wood knot 42%, wollastonite 3%, talc 8%, select Yuanan soil, bauxite, purple wood knot, wollastonite and talc;

[0055] The Yuan'an soil, bauxite, purple wood knot, wollastonite and talc are all ground in a ball mill with water, dried and passed through a 300-mesh sieve, and then mixed to obtain batch materials;

[0056] Described Yuan'an soil is the soil of Yuan'an County, Hubei Province;

[0057] Described dispersant is hexametaphosphoric acid;

[0058] 2) Preparation of slurry: according to the mass percentage of each component: batch material 75%, water 24.25%, dispersant 0.75%, select batch material, water and dispersant; add water and dispersant to the batch material in a ball mill Ball milling ...

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Abstract

The invention relates to a heat exchanger ceramic material for a bulk tobacco flue-curing house and a preparation method thereof. A heat exchanger ceramic material for a bulk tobacco flue-curing house is characterized in that the material is made from the following components of: by weight, 64.25-75% of a batch material, 24.25-35% of water and 0.75-1.25% of a dispersant. The batch material contains the following raw materials of, by weight, 10-23% of Yuan'an clay, 33-50% of bauxitic clay, 34-42% of knar clay, 1-3% of wollastonite and 5-8% of talcum. The heat exchanger ceramic material has high strength, high density, high thermal conductivity and good thermal shock resistance.

Description

technical field [0001] The invention relates to a heat exchanger ceramic material for a dense flue-cured room and a preparation method thereof. Background technique [0002] As an advanced form of tobacco leaf curing at present and in the future, intensive curing barns will be fully promoted, and the scale will reach 810,000 in the country within three years. At present, my country's intensive flue-cured tobacco rooms mainly use steel heat exchangers with poor corrosion resistance, and the fuel is mainly coal. The sulfur-containing flue gas produced after coal combustion is extremely corrosive to the heat exchanger, so the use of steel heat exchangers Shorter lifespan. However, if an acid-resistant alloy steel heat exchanger is used, its price is high, and the comprehensive cost of flue-cured tobacco is greatly improved. The high-temperature creep performance of the metal heat exchanger is poor, which also makes the heat of the flue gas in the high-temperature section unusa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/13C04B35/10C04B35/622
Inventor 熊吉程金树袁红涛汤李缨梅东海陆平程曦
Owner 湖北省烟叶公司
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