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Preparation method of complex-shaped fire-resistant and heat-insulating tile for heavy-duty gas turbine
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A gas turbine and complex shape technology, applied in the field of castables, can solve the problems of poor uniformity of the green body, affecting the high temperature performance of the material, and complicated preparation procedures.
Pending Publication Date: 2020-11-06
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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Problems solved by technology
[0004] At present, the two methods of preparing corundum-mulliterefractory and heat-insulating tiles have the following problems: the machine pressing method, the material has a complicated preparation process, and the uniformity of the green body is poor; the casting method, it is easy to introduce impurities to affect the high temperature performance of the material
Due to the existence of the above problems, the better popularization and application of corundum-mulliterefractory insulation tiles is limited.
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Embodiment 1
[0015] The heavy-duty gas turbine is a complex-shaped refractory and heat-insulating castable material, and its components include: 70 parts of aggregate, 30 parts of fine powder, 4 parts of added water, and 0.5 part of Isobam-104.
[0016] Among the aggregates, there are 46 parts of mullite coarse aggregate of 3~5 mm, 15 parts of medium mullite aggregate of 1~3 mm, and 39 parts of fine aggregate of 0~1 mm.
[0017] In fine powder, 0~10 μm Al 2 o 3 60 parts of fine powder, 0~0.5 μm Al 2 o 3 Micron submicron powder 40 parts.
[0018] Each component was weighed according to the proportion and mixed evenly in a forced mixer, poured into the mold, cured at room temperature for 3 days, kept at 110°C for 24 hours, and kept at 1680°C for 4 hours after demoulding.
Embodiment 2
[0020] The heavy-duty gas turbine is a complex-shaped castable for refractory and heat-insulating tile materials. The components include: 65 parts of aggregate, 35 parts of fine powder, 6 parts of added water, and 0.3 parts of Isobam-104 and Isobam-600.
[0021] Among the aggregates, there are 46 parts of mullite coarse aggregate of 3~5 mm, 15 parts of medium mullite aggregate of 1~3 mm, and 39 parts of fine aggregate of 0~1 mm.
[0022] In fine powder, 0~10 μm Al 2 o 3 70 parts of fine powder, 0~0.5 μm Al 2 o 3 30 parts of micron submicron powder.
[0023] Weigh each component according to the ratio and mix them evenly in a forced mixer, pour them into a mold, maintain at room temperature for 3 days, keep warm at 110°C for 24 hours, and demould Afterwards, they were incubated at 1700 °C for 4 h.
Embodiment 3
[0025] The heavy-duty gas turbine is a complex-shaped refractory and heat-insulating castable material, and its components include: 60 parts of aggregate, 40 parts of fine powder, 5 parts of added water, and 0.5 part of Isobam-104.
[0026] Among the aggregates, there are 40 parts of mullite coarse aggregate of 3~5 mm, 15 parts of medium mullite aggregate of 1~3 mm, and 45 parts of fine aggregate of 0~1 mm.
[0027] In fine powder, 0~10 μm Al 2 o 3 30 parts of fine powder, 0~0.5 μm Al 2 o 3 70 parts of micronized submicron powder. Weigh each component according to the ratio and mix them evenly in a forced mixer, pour them into a mold, maintain at room temperature for 3 days, keep warm at 110°C for 24 hours, and demould Afterwards, it was incubated at 1710 °C for 4 h.
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Abstract
The invention discloses a preparation method of a complex-shaped fire-resistant and heat-insulating tile for a heavy-duty gas turbine. Mullite particles are adopted as the aggregate, Al2O3 is taken asfine powder and Isobam is used as a solidification forming agent, and preparing the fire-resistant and heat-insulating tile for the heavy-duty gas turbine in a net near size by adopting a casting forming technology. According to the method, in the green body forming-drying-sintering process, materials are hardly changed linearly, and net near-size forming of the complex-shaped fire-resistant andheat-insulating tile is achieved; meanwhile, a corundum-mullitesystem is selected as the material, no impurity is introduced in the preparation process, and the material has the characteristics of high purity, high temperature resistance, thermal shock resistance, excellent mechanical properties and the like.
Description
technical field [0001] The invention relates to the technical field of castables, in particular to a preparation method of complex-shaped refractory and heat-insulating tiles for heavy-duty gas turbines. Background technique [0002] Heavy-duty gas turbines are known as the "crown jewel" of the equipment manufacturing industry. They are by far the most efficient heat-to-power conversion power generation equipment. They are the core equipment in the field of power generation and drive, and are related to national energy security, national defense security and industrial competition. For decades, with the development of industrial technology, in order to pursue higher thermal efficiency of gas turbines, the temperature of gas turbinecombustion chambers has been continuously increased, and the temperature of combustion chambers has increased from less than 1000 °C initially to more than 1600 °C. In this extremely harsh service environment (high temperature, high pressure, impa...
Claims
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Application Information
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