A kind of in-situ carbon-containing refractory castable and preparation method thereof

A technology for refractory castables and refractory raw materials, applied in the field of refractory materials, can solve the problems of hindering the industrial application of carbon-containing refractory castables, difficult dispersion of refractory castables, poor water wettability, etc., and achieves superior erosion resistance and superior mechanical properties. , the effect of low cost

Active Publication Date: 2022-04-12
ZHENGZHOU UNIVERSITY OF AERONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the actual application process, due to the low density and poor water wettability of carbon materials, there are bottleneck problems such as difficulty in dispersion and easy oxidation in refractory castables, which hinders the process of industrial application of carbon-containing refractory castables

Method used

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  • A kind of in-situ carbon-containing refractory castable and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0025] A refractory castable containing in-situ carbon, including A component and B component, the weight ratio of A component and B component is 100:3.5, A component is composed of the following refractory raw materials: corundum particles 75%, sintered Magnesia 15%, activated alumina micropowder 5%, calcium aluminate cement 4%, silica micropowder 1%, the gradation of corundum particles is: 5-8mm fused white corundum 20%, 3-5mm fused white Corundum 25%, 1-3mm tabular alumina 20%, 0-1mm tabular alumina 15%, ≤45um tabular alumina 10%; activated alumina gradation: ≤325um activated alumina 2%; sintered magnesia gradation For: 0-3mm sintered magnesia 8%; Al in calcium aluminate cement 2 o 3 The content of the compound is 69.5%; the B component is transition metal in-situ doped polymer solution, the composition is: deionized water 60%, polyethylene glycol 38%, cobalt nitrate 0.2%, citric acid 1.8%.

[0026] The preparation method of the above-mentioned in-situ carbon-containing r...

Embodiment 2

[0032] A refractory castable containing in-situ carbon, including A component and B component, the weight ratio of A component and B component is 100:4, A component is composed of the following refractory raw materials: corundum particles 77%, sintered Magnesia 13%, activated alumina micropowder 4%, calcium aluminate cement 5%, silica micropowder 1%, among which the gradation of corundum particles is: 22% for 5-8mm fused white corundum, 3-5mm fused white Corundum 20%, 1-3mm tabular alumina 18%, 0-1mm tabular alumina 10%, ≤45um tabular alumina 5%; activated alumina gradation: ≤325um activated alumina 3%; sintered magnesia gradation For: 0-3mm sintered magnesia 10%; Al in calcium aluminate cement 2 o 3 The content is 70%; B component is transition metal in-situ doped polymer solution, the composition is: deionized water 70%, polyethylene glycol 27%, ferric chloride 0.05%, citric acid 2.95%.

[0033] The preparation method of the above-mentioned in-situ carbon-containing refrac...

Embodiment 3

[0039]A refractory castable containing in-situ carbon, including A component and B component, the weight ratio of A component and B component is 100:5, A component is composed of the following refractory raw materials: corundum particles 80%, sintered 9% magnesia, 5% activated alumina micropowder, 5% calcium aluminate cement, 1% silica micropowder, among which the gradation of corundum particles is: 25% for 5-8mm fused white corundum, 3-5mm fused white Corundum 25%, 1-3mm tabular alumina 20%, 0-1mm tabular alumina 15%, ≤45um tabular alumina 10%; activated alumina gradation: ≤325um activated alumina 5%; sintered magnesia gradation For: 0-3mm sintered magnesia 15%; Al in calcium aluminate cement 2 o 3 content of 70.5%; B component is transition metal in-situ doped polymer solution, composed of: deionized water 90%, polyethylene glycol 9%, nickel chloride 0.03%, citric acid 0.97%.

[0040] The preparation method of the above-mentioned in-situ carbon-containing refractory castab...

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Abstract

The invention discloses a refractory castable containing in-situ carbon, which comprises A component and B component, and the A component is composed of refractory raw material corundum particles, sintered magnesia, activated alumina micropowder, calcium aluminate cement and silica micropowder , B component is transition metal in-situ doped polymer solution. The present invention adds transition metal in-situ doping polymer aqueous solution to the raw material, on the one hand endows the refractory castable raw material mixture with fluidity during the preparation process; on the other hand, during the sintering process, the polymer is pyrolyzed to generate carbon materials, Realize the dispersion of carbon materials in castables, and at the same time transition metals improve the degree of graphitization of carbon materials generated in situ. According to the theory of in situ synthesis, carbon materials in refractory castables containing in situ carbon have good dispersion and can play The slag non-wetting properties of the material endow carbon-containing refractory castables with superior mechanical properties and corrosion resistance. The invention also provides a method for preparing refractory castables containing in-situ carbon, which has a simple process and is beneficial to industrial production.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to an in-situ carbon-containing refractory castable and a preparation method thereof. Background technique [0002] In recent decades, with people's increasing emphasis on environmental protection and the introduction of national energy-saving and emission reduction policies, refractory castables are easy to construct, fast, low in cost, and have similar service performance to corresponding shaped refractory materials. It is increasing year by year and widely used in high-temperature fields such as blast furnace tapholes, ladles, and cement rotary kiln linings. Refractory castables have become one of the most important development directions in the field of refractory materials. [0003] However, since refractory castables are mainly composed of oxides, they have the same disadvantages as corresponding oxide shaped products, such as poor erosion resistance, poor thermal shock res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/103
CPCC04B35/103C04B2235/3206C04B2235/3222C04B2235/3418C04B2235/443C04B2235/444C04B2235/658C04B2235/6567C04B2235/9676C04B2235/96
Inventor 杨守磊樊磊关莉庞瑞李广王新乐
Owner ZHENGZHOU UNIVERSITY OF AERONAUTICS
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