In-situ carbon-containing refractory castable and preparation method thereof

A technology of refractory castables and refractory raw materials, applied in the field of refractory materials, can solve problems such as hindering the industrial application of carbon-containing refractory castables, difficulty in dispersing refractory castables, poor water wettability, etc., and achieve superior erosion resistance and superior mechanical properties , low cost effect

Active Publication Date: 2020-06-16
ZHENGZHOU UNIVERSITY OF AERONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • 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 an in-situ carbon-containing refractory castable, which comprises a component A and a component B. The component A is composed of refractory raw material corundum particles, sintered magnesia, activated alumina micropowder, calcium aluminate cement and silica micropowder, and the component B is a transition metal in-situ doped polymer solution. The transition metal in-situdoped polymer aqueous solution is added into the raw materials, so that on one hand, the raw material mixture of the refractory castable is endowed with fluidity in the preparation process, and on theother hand, the polymer is pyrolyzed to produce a carbon material in the sintering process, the carbon material is dispersed and distributed in the castable, meanwhile, the graphitization degree of the in-situ generated carbon material is improved through transition metal, and according to the in-situ synthesis theory, the carbon material in the in-situ carbon-containing refractory castable has good dispersity, the non-wetting characteristic of carbon material slag can be brought into play, and the carbon-containing refractory castable is endowed with excellent mechanical properties and erosion resistance. The invention further provides a preparation method of the in-situ carbon-containing refractory castable, the technological process is simple, and industrial production is facilitated.

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 Applications(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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