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A kind of refractory castable for molten salt chlorination furnace and its preparation method and application

A refractory castable and molten salt chlorination furnace technology, applied in the field of refractory materials, can solve the problems of poor clay corrosion resistance against molten salt, accelerated molten salt erosion of clay, salt leakage from molten salt chlorination furnace, etc. The molten salt has good erosiveness, ensures stable continuous production, and has the effect of good fluidity

Active Publication Date: 2015-09-16
攀钢冶金材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the graphite electrode has a large current passing through it, it will also generate heat, and the salt will also conduct electricity and generate heat in the molten state. Therefore, the molten salt around the graphite electrode has no solidification conditions, and the molten salt at the front end will gradually seep out along the slit. until out of the furnace
On the other hand, due to the poor corrosion resistance of the clay used in the original bricklaying, after the chlorination furnace has been running for a period of time after adding salt, the temperature of the clay around the graphite electrode is high, which accelerates the erosion of the clay by the molten salt, which is easy Formation of leaky salt channels around graphite electrodes
At present, there is no material that can solve the problem of salt leakage in molten salt chlorination furnaces

Method used

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  • A kind of refractory castable for molten salt chlorination furnace and its preparation method and application
  • A kind of refractory castable for molten salt chlorination furnace and its preparation method and application
  • A kind of refractory castable for molten salt chlorination furnace and its preparation method and application

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preparation example Construction

[0024] The present invention also provides a preparation method of the refractory castable, which may include corundum, mullite, water reducer, binder, α-Al 2 o 3 Micropowder and hardening additives are mixed, preferably, the method also includes corundum, mullite, water reducer, binder, α-Al 2 o 3 Micronized powder, hardening additives and silica fume are mixed.

[0025] According to the preparation method provided by the present invention, the consumption of each component can be adjusted according to actual needs. In order to make the performance of the prepared refractory castable better, preferably, the consumption of each component is based on the total weight of the obtained refractory castable , the content of the corundum is 50-80% by weight, the content of the mullite is 1-10% by weight, the content of the water reducing agent is 0.01-0.2% by weight, and the content of the binder is 10-30% by weight, The α-Al 2 o 3 The content of the fine powder is 1-10% by weig...

Embodiment 1

[0036] This example is used to illustrate the preparation of the refractory castable provided by the present invention.

[0037] First, corundum is ground to three different particle sizes of 8mm, 3mm, and 0.08mm, and mullite is ground to a particle size of 1mm. Based on the total weight of the refractory castable to be prepared, each raw material is 24% by weight of 8mm corundum, 24% by weight of 3mm corundum, 15% by weight of 0.08mm corundum, 5% by weight of mullite, 5% by weight of silica fume, α-Al 2 o 3 Micropowder 5% by weight, sodium tripolyphosphate 0.1% by weight, aluminum dihydrogen phosphate (bulk density 1.35g / cm 3 ) 6.5% by weight to obtain a mixture, the mixture is trapped for 24 hours, and then the mixture after trapping is mixed with pure calcium aluminate cement 2.5% by weight and aluminum dihydrogen phosphate (volume density is 1.35g / cm 3 ) 12.9% by weight for mixing, which is the refractory castable for molten salt chlorination furnace.

Embodiment 2

[0039] This example is used to illustrate the preparation of the refractory castable provided by the present invention.

[0040] First, corundum is ground to three different particle sizes of 7mm, 2mm, and 0.08mm, and mullite is ground to a particle size of 1mm. Based on the total weight of the refractory castable to be prepared, the raw materials are divided into 24% by weight of 7mm corundum, 24% by weight of 2mm corundum, 20% by weight of 0.08mm corundum, 5% by weight of mullite, α-Al 2 o 3 Micropowder 5% by weight, sodium tripolyphosphate 0.1% by weight, aluminum dihydrogen phosphate (bulk density 1.35g / cm 3 ) of 6.8% by weight to obtain a mixture, the mixture is trapped for 24 hours, and then the mixture after trapping is mixed with pure calcium aluminate cement 2.1% by weight and aluminum dihydrogen phosphate (volume density is 1.35g / cm 3 ) 13% by weight for mixing, which is the refractory castable for molten salt chlorination furnace.

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Abstract

The invention provides a refractory castable material for a salt chlorinator, a preparation method and an application thereof. The refractory castable material comprises corundum, mullite, a water reducer, a binding agent, alpha-Al2O3 micropowder and a hardening additive. The refractory castable material has the advantages of good molten salt corrosion resistance, small thermal expansion coefficient, excellent fluidity and the like, can be used on the periphery of an electrode of the salt chlorinator, can be used for effectively avoiding salt leakage of the electrode of the salt chlorinator and guaranteeing stable and continuous production of TiCl4, and excellent economical benefit and social benefit.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a refractory castable for a molten salt chlorination furnace and a preparation method and application thereof. Background technique [0002] In the process of producing sponge titanium, the furnace lining of the molten salt chlorination furnace is built with clay bricks, and the clay combined with the surrounding graphite electrodes will produce tiny gaps around the graphite electrodes during the drying and shrinkage process. In fact, in the range of 20°C-1000°C, the thermal expansion coefficient of clay bricks is 4.5-6.0×10 -6 m / °C, however, within this temperature range, the thermal expansion coefficient of the graphite electrode is 1.5×10 -6 m / °C, due to the inconsistent coefficient of thermal expansion, the gap between the graphite electrode and the refractory material increases during the heating process. At the working temperature, the molten salt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 段大福段晓东杨强王长民张春程伟吴传坤郭强王怀斌黄玉东
Owner 攀钢冶金材料有限责任公司
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