Infrared energy-saving coating of high-temperature kiln and preparation method thereof

An energy-saving coating and high-temperature kiln technology, which is applied in the field of infrared radiation ceramic materials, can solve problems such as low operating temperature, poor thermal shock resistance, and unstable energy-saving effect, and achieve energy saving, prolonging kiln life, and simple preparation methods Effect

Inactive Publication Date: 2013-01-16
CHINA SILICON ZIBOCERAMIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the simple mechanical mixing of most radiant filler powders, there are still prob...

Method used

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  • Infrared energy-saving coating of high-temperature kiln and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First weigh 4.3 kg of ferric oxide, 2.0 kg of cobalt oxide, 2.89 kg of nickel oxide, 8.7 kg of manganese dioxide, and 2.0 kg of nano-scale lanthanum oxide, and grind them in a ball mill after mixing evenly, wherein the ball-to-material ratio is 10:1. The grinding time is 2 hours, the ground powder is heated up to 1200°C at 3°C / min, kept for 4 hours, then air-cooled to room temperature to obtain a spinel solid solution doped with nano-rare earth oxides, and the obtained sintered body is crushed, Crush and pass through a 350-mesh sieve to make infrared radiation powder.

[0025] Take by weighing again 25 kilograms of silica sol, 2 kilograms of inorganic bentonite, 21 kilograms of quartz powder, 5.25 kilograms of calcined alumina, 8.75 kilograms of refractory clinker, 4 kilograms of hydroxycellulose, 3 kilograms of sodium hexametaphosphate and 12 kilograms of water, and infrared radiation The powder is fully mixed, dispersed in a stirring disperser at a speed of 4500r / ...

Embodiment 2

[0027] First weigh 3.8 kg of ferric oxide, 2.2 kg of cobalt oxide, 2.5 kg of nickel oxide, 7.8 kg of manganese dioxide, and 1.8 kg of nano-scale lanthanum oxide, and grind them in a ball mill after mixing evenly, wherein the ball-to-material ratio is 15:1. The grinding time is 3 hours, and the ground powder is heated up to 1350°C at a rate of 5°C / min. After holding the temperature for 3 hours, it is air-cooled to room temperature to obtain a spinel solid solution doped with nano-rare earth oxides. The obtained sintered body is crushed, Crush and pass through a 350-mesh sieve to make infrared radiation powder.

[0028] Take by weighing again 27 kilograms of silica sol, 2.2 kilograms of inorganic bentonite, 25 kilograms of quartz powder, 5.5 kilograms of calcined alumina, 9.2 kilograms of refractory clinker, 3.8 kilograms of hydroxycellulose, 2.8 kilograms of sodium hexametaphosphate and 10 kilograms of water, and infrared radiation The powder is fully mixed, dispersed in a st...

Embodiment 3

[0030] First weigh 4.5 kg of ferric oxide, 2.7 kg of cobalt oxide, 1.8 kg of nickel oxide, 8 kg of manganese dioxide, and 1.5 kg of nano-scale lanthanum oxide, and grind them in a ball mill after mixing evenly, wherein the ball-to-material ratio is 12:1. The grinding time is 2.5 hours. The ground powder is heated up to 1300°C at 4°C / min, kept for 3.5 hours and then air-cooled to room temperature to obtain a spinel solid solution doped with nano-rare earth oxides. The obtained sintered body is crushed, Crush and pass through a 350-mesh sieve to make infrared radiation powder.

[0031] Take by weighing again 30 kilograms of silica sol, 2.6 kilograms of inorganic bentonite, 26 kilograms of quartz powder, 5.5 kilograms of calcined alumina, 8.5 kilograms of refractory clinker, 3.5 kilograms of hydroxycellulose, 2.5 kilograms of sodium hexametaphosphate and 11 kilograms of water, and infrared radiation The powder is fully mixed, dispersed for 1.5 hours in a stirring and dispersing...

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Abstract

The invention relates to the field of infrared radiating ceramics materials, in particular to an infrared energy-saving coating of a high-temperature kiln and a preparation method of the infrared energy-saving coating. The infrared energy-saving coating comprises the following raw materials in parts by mass: 10 to 30 parts of infrared radiating filler, 30 to 40 parts of filling material, 20 to 30 parts of silica sol, 8 to 20 parts of assistant and 10 to 15 parts of water, wherein the infrared radiating filler comprises the following raw materials in parts by mass: 10 to 20 parts of iron sesquioxide, 5 to 10 parts of cobalt oxide, 0 to 30 parts of nickel oxide, 20 to 50 parts of manganese dioxide, and 5 to 10 parts of nanoscale lanthanum oxide. The preparation method comprises the steps of mixing raw materials, diffusing, grinding, homogenizing to reach the average grain size of 350 to 500 meshes, filtering, encapsulating to obtain the product. According to the infrared radiating coating prepared by the method provided by the invention, a multi-phase composite ceramics layer is sintered at a lining of an inorganic kiln during heating; and the infrared radiating coating can be used for a long time at higher temperature, the energy consumption can be saved, and the service life of a kiln can be prolonged.

Description

technical field [0001] The invention relates to the field of infrared radiation ceramic materials, in particular to an infrared energy-saving coating for a high-temperature furnace and a preparation method thereof. Background technique [0002] The development and rational use of energy is an important national policy of our country. Radiation heating has become the primary method of material heating because it is insensitive to the atmosphere (oxygen and nitrogen) in the furnace chamber and has low heat loss. Most of the furnace body materials of high-temperature industrial furnaces are silicon, aluminum refractory bricks and amorphous castables, which are both structural materials and insulation materials of the furnace. The heating temperature of these kilns is generally above 1000°C, and their energy is generally concentrated in the 1-5μm band. The emissivity of ordinary kiln materials in the above band is 0.45~0.5, so the utilization rate of radiation heating is gener...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 李永周广振张秀山
Owner CHINA SILICON ZIBOCERAMIC TECH
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