Inorganic radiation coating material for kiln interior walls

A radiation coating and interior wall technology, which is applied in the field of inorganic materials, can solve problems affecting the use effect and service life, cracking and falling off of radiation materials, easy cracking and falling off of coatings, etc., and achieves low-cost sources, convenient use, and source wide range of effects

Inactive Publication Date: 2017-06-09
罗周
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in recent years, the application of energy-saving radiant inorganic coatings in kilns has been widely recognized, but in the use of existing kilns, the coatings are easy to crack and fall off, which affects the use effect and service life
[0003] For the problem of cracking and falling off of radiant materials, the existing solutions focus on improving the bonding strength between the binder in the coating composition and the matrix material in the furnace, but during the heating and cooling process of the radiant coating in the kiln, due to The difference in thermal expansion between the filling material and radiation material in the coating and the base material can also easily cause cracking and peeling off of the coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A method for preparing an inorganic radiation coating material for an inner wall of a kiln, comprising the following steps:

[0012] (1) Weigh 1 kg of kaolin, 50 kg of silica sol, and 50 kg of chromite powder;

[0013] (2) Mix the powdery raw materials evenly and mix them with the silica sol evenly, then the coating operation in the kiln can be carried out.

[0014] Performance Testing:

[0015] Radiation performance: According to the experimental method of GB4653-84, the total normal emissivity is measured, and the normal total emissivity of the above coating ε n =0.89, which is higher than the standard normal full emissivity ε n Should not be less than 0.85 technical conditions.

[0016] Thermal Shock Stability: The test was carried out according to the test method of YB / T134-1998. The test temperatures were 1000°C and 1200°C respectively. The result: after more than 9 times of rapid cooling and rapid heating, no peeling and cracking of the detected coating occurre...

Embodiment 2

[0018] A method for preparing an inorganic radiation coating material for an inner wall of a kiln, comprising the following steps:

[0019] (1) Weigh 2 kg of kaolin, 60 kg of silica sol, 58 kg of chromite powder, and 2 kg of ferric oxide;

[0020] (2) Mix the powdery raw materials evenly and mix them with the silica sol evenly, then the coating operation in the kiln can be carried out.

[0021] Performance Testing:

[0022] Radiation performance: According to the experimental method of GB4653-84, the total normal emissivity is measured, and the normal total emissivity of the above coating ε n =0.9, which is higher than the standard normal full emissivity ε n Should not be less than 0.85 technical conditions.

[0023] Thermal Shock Stability: The test was carried out according to the test method of YB / T134-1998. The test temperatures were 1000°C and 1200°C respectively. The result: after more than 9 times of rapid cooling and rapid heating, no peeling and cracking of the det...

Embodiment 3

[0025] A method for preparing an inorganic radiation coating material for an inner wall of a kiln, comprising the following steps:

[0026] (1) Weigh 2 kg of kaolin, 60 kg of silica sol, 58 kg of chromite powder, and 2 kg of silicon carbide;

[0027] (2) Mix the powdery raw materials evenly and mix them with the silica sol evenly, then the coating operation in the kiln can be carried out.

[0028] Performance Testing:

[0029] Radiation performance: According to the experimental method of GB4653-84, the total normal emissivity is measured, and the normal total emissivity of the above coating ε n =0.92, which is higher than the standard normal full emissivity ε n Should not be less than 0.85 technical conditions.

[0030] Thermal Shock Stability: The test was carried out according to the test method of YB / T134-1998. The test temperatures were 1000°C and 1200°C respectively. The result: after more than 9 times of rapid cooling and rapid heating, no peeling and cracking of the...

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PUM

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Abstract

The invention discloses an inorganic radiation coating material for kiln interior walls, produced from, by weight, 1-2 parts of kaolin, 50-60 parts of silica sol, and 50-60 parts of radiation material, wherein the radiation material is composed of, by weight, 48-58 parts of chromite powder, 0-3 parts of silicon carbide, 0-2 parts of iron sesquioxide, 0-2 parts of cerium oxide, and 0-2 parts of manganese dioxide. The inorganic radiation coating material for kiln interior walls provides high bonding strength of a coating layer, and has good thermal shock resistance and stable radiation performance.

Description

technical field [0001] The invention relates to the technical field of inorganic materials, in particular to an inorganic radiation coating material for the inner wall of a kiln. Background technique [0002] The refractory material of the kiln body has to absorb and dissipate a large amount of heat generated by the combustion of fuel in the kiln during the heating and heating process of the kiln, which has become one of the main reasons for the energy consumption of the kiln. For kilns used in the ceramic industry, most of the refractory materials are A1 2 o 3 -SiO 2 system of inorganic materials, if the lining of the kiln is coated with a coating material with a high emissivity coefficient, it will improve the A1 2 o 3 -SiO 2 The radiation performance of the refractory system, the heat of fuel combustion is more effective on the heated product due to the improvement of the radiation performance of the kiln lining, and the external wall insulation reduces heat loss, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66
Inventor 罗周
Owner 罗周
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