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Molten salt furnace pouring material and preparation method thereof

A castable and molten salt furnace technology, applied in the field of refractory materials, can solve problems such as wasting energy and affecting normal production, and achieve the effects of avoiding abnormal looseness, high reliability, and excellent thermal shock resistance

Active Publication Date: 2015-12-09
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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  • Molten salt furnace pouring material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Castable formula for molten salt furnace:

[0028] Component particle size weight content

[0029] Coal gangue clinker 6-0mm65%

[0030] Coal gangue clinker 200 mesh 10%

[0031] Tabular corundum fine powder 325 mesh 15%

[0032] Hydrated alumina 5%

[0033] Silicon powder 5%

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

[0035] CASTAMENTFS 200.10%.

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

[0037] The first step: raw material preparation and inspection; purchase raw materials according to technical standards, and inspect raw materials according to national standards, and then put them into use only after they are qualified;

[0038] The second step: preparation process of coal gangue clinker particles, using jaw crusher and counter-roll crusher to make coal gangue clinker into the required particle size;

[0039] The third step: magnetic separation and iron removal process, using super-strong magnetic separator to carry out strong mag...

Embodiment 2

[0051] Castable formula for molten salt furnace:

[0052] Component particle size weight content

[0053] Coal gangue clinker 6-0mm65%

[0054] Coal gangue clinker 200 mesh 10%

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

[0056] Hydrated alumina 5%

[0057] Silicon powder 5%

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

[0059] CASTAMENTFS 200.10%.

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

[0061] The main physical and chemical indexes of molten salt furnace castables 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℃, the matrix XRD results show that the main crystal phase is mullite;

[0064] Thermal shock resistance: The number of thermal shocks is 45.

[0065] CO corrosion resistance: The test standard adopts the American "Test Method for Disintegration of Refractories in CO Atmosphere" (ASTMC288). The test ...

Embodiment 3

[0067] Castable formula for molten salt furnace:

[0068] Component particle size weight content

[0069] Coal gangue clinker 6-0mm65%

[0070] Tabular corundum fine powder 325 mesh 24%

[0071] Hydrated alumina 5%

[0072] Silicon powder 6%

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

[0074] CASTAMENTFS 200.12%.

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

[0076] The main physical and chemical indexes of molten salt furnace castables 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 sintering at 1400°C, the matrix XRD results show that the main crystalline phase is mullite and the secondary crystalline phase is corundum;

[0079] Thermal shock resistance: 58 thermal shocks.

[0080] CO corrosion resistance: The test standard adopts the American "Test Method for Disintegration of Refractories in CO Atmosphere" (ASTMC288). The test result...

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Abstract

The present invention particularly relates to a molten salt furnace pouring material and a preparation method thereof. The technical scheme comprises: adopting low iron, a coal gangue clinker being subjected to an iron reducing treatment and a corundum material as main raw materials, adopting hydrated alumina as a binding agent, and carrying out inspection, crushing, iron removing, material matching, mixing, random inspection and other steps to prepare the low iron and high anti-thermal shock molten salt furnace pouring material. According to the present invention, the pouring material has strong CO erosion resistance, such that the condition that the furnace hearth lining body become abnormal loose can be effectively avoided; the pouring material does not contain cement, has high high-temperature strength and excellent thermal shock resistance, and can bear strong erosion of high temperature flue gas and coal ash and sharp fluctuation of the furnace hearth temperature; and with the iron reducing and the high thermal shock resistance of the molten salt furnace pouring material, the service life of the furnace hearth lining body can be significantly improved, and the long service life and the high reliability of the molten salt furnace lining can be achieved.

Description

Technical field [0001] The invention belongs to the technical field of refractory materials, and specifically relates to a molten salt furnace castable 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 insolubility in diaspore-type 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 device in the pipeline dissolution system. [0003] At present, the furnace of the molten salt furnace of the alumina plant is usually made of integrally poured high-alumina refractory castables, and the fuel used is low-priced 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℃, on the one hand, Fe 2 O 3 Will gradually be reduced to Fe or...

Claims

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Application Information

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