A kind of castable for molten salt furnace and preparation method thereof

A castable and molten salt furnace technology, applied in the field of refractory materials, can solve problems affecting normal production and wasting energy, and achieve high reliability, avoid abnormal looseness, and improve service life

Active Publication Date: 2018-07-06
LUOYANG KECHUANG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the furnace lining is seriously damaged, the furnace must be stopped for repair, which not only wastes a lot of energy, but also seriously affects the normal production

Method used

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  • A kind of castable for molten salt furnace and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Molten salt furnace castable formula:

[0028] Component Particle Size Weight Content

[0029] Gangue clinker 6-0mm 65%

[0030] Coal gangue clinker 200 mesh 10%

[0031] Tabular corundum fine powder 325 mesh 15%

[0032] Hydrated Aluminum Oxide 5%

[0033] Microsilica 5%

[0034] Low melting point explosion-proof fiber 0.05%

[0035] CASTAMENT FS20 0.10%.

[0036] The manufacturing method of this embodiment includes the following steps:

[0037] The first step: raw material preparation and inspection; raw materials are purchased according to technical standards, and raw materials are inspected according to national standards, and can only be put into use after passing the test;

[0038] The second step: the gangue clinker particle preparation process, using the jaw crusher and the roller crusher to make the gangue clinker into the required particle size;

[0039] The third step: magnetic separation and iron removal process, using a super-strong magnetic separat...

Embodiment 2

[0051] Molten salt furnace castable formula:

[0052] Component Particle Size Weight Content

[0053] Gangue clinker 6-0mm 65%

[0054] Coal gangue clinker 200 mesh 10%

[0055] Fused white corundum fine powder 325 mesh 15%

[0056] Hydrated Aluminum Oxide 5%

[0057] Microsilica 5%

[0058] Low melting point explosion-proof fiber 0.05%

[0059] CASTAMENT FS20 0.10%.

[0060] The manufacturing method of this embodiment is the same as that of Embodiment 1.

[0061] The main physical and chemical indicators of the molten salt furnace castable in this embodiment are:

[0062] Chemical Composition: Al 2 o 3 54.3%, SiO 2 44.6%, Fe 2 o 3 0.25%;

[0063] Matrix mineral phase composition: After firing at 1400°C, the matrix XRD results show that the main crystal phase is mullite;

[0064] Thermal Shock Resistance: The number of thermal shocks is 45 times.

[0065] Resistance to CO erosion: The test standard adopts the American "Test Method for Disintegration of Refr...

Embodiment 3

[0067] Molten salt furnace castable formula:

[0068] Component Particle Size Weight Content

[0069] Gangue clinker 6-0mm 65%

[0070] Tabular corundum fine powder 325 mesh 24%

[0071] Hydrated Aluminum Oxide 5%

[0072] Microsilica 6%

[0073] Low melting point explosion-proof fiber 0.06%

[0074] CASTAMENT FS20 0.12%.

[0075] The manufacturing method of this embodiment is the same as that of Embodiment 1.

[0076] The main physical and chemical indicators of the molten salt furnace castable in this embodiment are:

[0077] Chemical Composition: Al 2 o 3 58.7%, SiO 2 40.3%, Fe 2 o 3 0.28%;

[0078] Matrix mineral phase composition: after firing at 1400°C, the matrix XRD results show that the main crystal phase is mullite, and the secondary crystal phase is corundum;

[0079] Thermal Shock Resistance: The number of thermal shocks is 58 times.

[0080] Resistance to CO erosion: The test standard adopts the American "Test Method for Disintegration of Refracto...

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Abstract

The invention specifically relates to a casting material for a molten salt furnace and a preparation method thereof. Its technical plan is: use low-iron gangue clinker and corundum materials that have been treated with reduced iron as the main raw materials, and use hydrated alumina as the binder. After inspection, crushing, iron removal, batching, mixing, sampling and other processes Made into castables for molten salt furnaces with low iron and high thermal shock resistance. The castable has strong CO corrosion resistance and can effectively prevent the furnace lining from becoming abnormally loose. The castable does not contain cement, has high high-temperature strength and excellent thermal shock resistance, and can withstand strong erosion of high-temperature flue gas and coal ash and severe fluctuations in furnace temperature. The low iron and high thermal shock resistance of molten salt furnace castables can significantly increase the service life of the furnace lining and realize the longevity and high reliability of the molten salt furnace lining.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a casting material for a molten salt furnace and a preparation method thereof. Background technique [0002] In the alumina production process, due to the characteristics of high alumina, high silicon, poor grindability and difficult dissolution of diaspore bauxite in my country, the pipeline dissolution method has gradually become a development trend, while the molten salt furnace is It is the most critical heating equipment in the pipeline dissolution system. [0003] At present, the hearth of the molten salt furnace in an alumina plant is usually integrally cast with high-alumina refractory castables, and the fuel used is cheap bituminous coal or anthracite, so the atmosphere in the entire furnace is a strong reducing atmosphere. In this way, when the refractory encounters a strong CO atmosphere at 400-600°C, on the one hand, Fe 2 o 3 Will be gradual...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 马军强
Owner LUOYANG KECHUANG NEW MATERIAL CO LTD
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