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A kind of preparation method of refractory material for catofin propane dehydrogenation reactor

A refractory material and propane dehydrogenation technology, applied in the field of refractory materials, can solve the problems of destroying the firm bond between particles in the brick, reducing thermal shock stability, increasing cost, etc., achieving good thermal shock stability, preventing carbon deposition, avoiding The effect of brick strength reduction and damage

Active Publication Date: 2020-08-25
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above reaction results will lead to the formation of iron, which will destroy the structure of the brick body and the firm bond between the particles in the brick body, making the brick body loose and even broken
[0017] To sum up, the refractory materials for Catofin propane dehydrogenation reactor should have good thermal shock stability, high strength, excellent reduction resistance, and certain density; while traditional refractory materials with high strength and high density will bring The reduction of thermal shock stability, and the excellent reduction resistance requires the selection of high-purity iron-free raw materials, which will lead to a substantial increase in cost and a reduction in sinterability and thermal shock stability

Method used

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  • A kind of preparation method of refractory material for catofin propane dehydrogenation reactor
  • A kind of preparation method of refractory material for catofin propane dehydrogenation reactor
  • A kind of preparation method of refractory material for catofin propane dehydrogenation reactor

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Embodiment 1

[0044]The ingredients of the high alumina brick prepared by using the present invention are: 30% of 3-0.088mm burnt gemstone particles, 15% of 1-0.088mm three-grade alumina clinker particles, 1-0.088mm Molochite (Molochite) 5%, 1-0.088mm 0.088mm andalusite particles 5%, 1-0.088mm sillimanite particles 5%, 200 mesh coke gem fine powder 10%, 200 mesh three-grade alumina fine powder 10%, 325 mesh Molochite (Molochite) 5%, 10% 325 mesh sintered alumina fine powder, 5% 325 mesh bonded clay fine powder, plus 5% aluminum sulfate solution binder. First add the binder to the evenly mixed aggregate, then add the pre-mixed fine powder, mix through the wheel mill, and press the machine after trapping the material. After the green body is dried, it is fired at 1500°C.

Embodiment 2

[0046] The ingredients of the high alumina brick prepared by using the present invention are: 3-0.088mm burnt gemstone particles 20%, 1-0.088mm three-grade alumina clinker particles 15%, 1-0.088mm Molochite (Molochite) 10%, 1-0.088mm 0.088mm andalusite particles 5%, 1-0.088mm sillimanite particles 5%, 200 mesh coke gem fine powder 10%, 200 mesh three-grade alumina fine powder 10%, 325 mesh Molochite (Molochite) 10%, 10% 325 mesh sintered alumina fine powder, 5% 325 mesh bonded clay fine powder, plus 5% aluminum sulfate solution binder. First add the binder to the evenly mixed aggregate, then add the pre-mixed fine powder, mix through the wheel mill, and press the machine after trapping the material. After the green body is dried, it is fired at 1400°C.

Embodiment 3

[0048] The ingredients of the high alumina bricks prepared by using the present invention are: 3-0.088mm burnt gemstone particles 32%, 1-0.088mm three-grade alumina clinker particles 15%, 1-0.088mm Molochite (Molochite) 10%, 1-0.088mm 0.088mm andalusite particles 5%, 200 mesh coke gem fine powder 10%, 200 mesh three-grade alumina fine powder 10%, 325 mesh Molochite (Molochite) 5%, 325 mesh sintered alumina fine powder 5%, 325 Mesh binding clay fine powder 8%, plus aluminum sulfate solution binder 3%. First add the binder to the evenly mixed aggregate, then add the pre-mixed fine powder, mix through the wheel mill, and press the machine after trapping the material. After the green body is dried, it is fired at 1450°C.

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Abstract

The invention provides a preparation method of a refractory material for a Catofin propane dehydrogenation reactor. The preparation method comprises the following steps: by taking flint clay, tertiarybauxite clinker, Molochite, andalusite and sillimanite as aggregates, taking flint clay, tertiary bauxite clinker, Molochite, sintered alumina and binding clay as substrates, adding an aluminium sulfate solution as a binding agent, mixing by an edge mill, and performing mechanical pressing after ageing the mixture. After being dried, a green body is sintered in the oxidizing atmosphere in a hightemperature kiln, wherein the highest sintering temperature is 1400-1500 DEG C. The preparation method has the advantages that high strength and high density, which can be reached by traditional highalumina bricks, can be met, high thermal shock resistance is achieved, and cracking and loosening of bricks, which are caused by the fact that residual iron ions results in catalytic depositing of COin the reducing atmosphere are avoided.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a method for preparing a refractory material for a Catofin propane dehydrogenation reactor. Background technique [0002] In a full cycle (about 20 minutes) of the Catofin process, hydrocarbon steam dehydrogenation is performed. The reactor is cleaned with steam, air purged, preheated and burned off a small amount of coke deposited on the catalyst, and then vacuumized and restored. Start another loop; as follows: [0003] 1. Propane dehydrogenation to olefins reaction; this reaction is a strong endothermic reaction, and the volume increases after the reaction, so high temperature and low pressure are conducive to the reaction. However, if the temperature is too high, the catalyst will coke, so the temperature should not be too high in actual work. [0004] 2. After the hydrocarbons are pumped away, all residual gases are purged with water vapor. [0005] 3. Afte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
CPCC04B35/66
Inventor 范沐旭石干王晗张涛王祺武刚李坚强冯志源李坤鹏
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES