Low-carbon magnesia carbon brick and preparation method thereof

A carbon-magnesia-carbon brick and magnesia technology, which is applied in the field of low-carbon magnesia-carbon brick and its preparation, can solve the problems of no significant improvement in corrosion resistance and high-temperature mechanical properties, difficult control of dispersion uniformity, and increased erosion of refractory materials. , to achieve the effect of easy industrial production, low production cost and high thermal shock stability
CN110357587AInactive Publication Date: 2019-10-22WUHAN UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN UNIV OF SCI & TECH
Publication Date
2019-10-22
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention relates to a low-carbon magnesia carbon brick and a preparation method thereof. The technical scheme is as follows: 78-93 wt% of magnesia particles, 0.1-2 wt% of organic additives and 5-20 wt% of absolute ethyl alcohol are placed in a stirrer, stirred for 2-6 hours at a rotating speed of 300-600 rpm, dried at 80-110 deg c for 12-24 hours, and sieved to obtain pretreated magnesia particles with a particle size of 1-5 mm. Then, 63-75 wt% of the pretreated magnesia particles, 20-32 wt% of magnesia fine powder, 2-5 wt% of flake graphite, 1-3 wt% of an antioxidant and 2-5 wt% of thermosetting phenolic resin are used as raw materials to be uniformly mixed, pressed and molded at 150-200 MPa, and then cured at 180-240 deg c for 18-24 hours to prepare the low-carbon magnesia carbon brick. The invention has the characteristics of low production cost, simple process and easy industrial production, and the prepared low-carbon magnesia carbon brick has high thermal shock stability, high high-temperature bending strength and good slag erosion resistance.
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Description

technical field

[0001] The invention belongs to the technical field of magnesia-carbon bricks. In particular, it relates to a low-carbon magnesia-carbon brick and a preparation method thereof. Background technique

[0002] Magnesia-carbon bricks are non-burning carbon composite refractories made of magnesia and high-melting-point carbon materials that are difficult to be infiltrated by slag as the main raw materials, adding various non-oxide additives and carbon binders. It has excellent characteristics such as high temperature resistance, strong slag resistance, high thermal shock resistance and low high temperature creep. It is mainly used in the lining of converters, AC electric arc furnaces, DC electric arc furnaces and slag lines of ladles. With the advancement of smelting technology, the requirements for refractory materials are also continuously increasing. Traditional magnesia carbon bricks have shown a series of shortcomings in long-term application practice: (1)...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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