CN105152657A - Refractory material for tundish and preparation method thereof - Google Patents

Abstract

The invention discloses a refractory material for tundish. The refractory material comprises the following raw materials by weight: 2 to 3 parts of asbolite, 0.1 to 0.17 part of hexamethyl cyclotrisiloxane, 2 to 3 parts of paper fiber, 0.1 to 0.2 part of phthalate, 30 to 37 parts of fast extruding furnace black, 6 to 10 parts of magnesium nitride, 1 to 2 parts of borax, 10 to 13 parts of linen fiber, 2 to 3 parts of glacial acetate acid, 26 to 30 parts of ethyl orthosilicate, 80 to 102 parts of ammonia water with a concentration of 6 to 10%, 100 to 110 parts of hydrogen peroxide with a concentration of 3 to 5%, 4 to 7 parts of terpene resin, 30 to 40 parts of forsterite powder and 1 to 2 parts of polyvinyl butyral. According to the invention, ethyl orthosilicate is hydrolyzed into silanol sol under the condition of addition of the catalyst glacial acetate acid; the silanol sol is mixed with a fiber activating solution, and a solvent is evaporated so as to obtain a heterocomplex of carbon and silicon; and finally, high temperature carbonization is carried out, and the fiber activating solution provides a carbon source, so a carbon-silicon composite auxiliary agent is obtained. The carbon-silicon composite auxiliary agent has the advantages of stable chemical performance, a high heat conduction coefficient, a small thermal expansion coefficient, heat resistance, light weight and high strength.

Description

A kind of tundish refractory materials and preparation method thereof

Technical field

The present invention relates to a kind of refractory materials, particularly relate to a kind of tundish refractory materials and preparation method thereof.

Background technology

Refractory materials refers to that refractoriness is not less than a class ceramic of 1580 DEG C.Refractoriness refers to that refractory materials cone-shaped body sample is not having in loading situation, resists high temperature action and does not soften molten centigradetemperature.But only define with refractoriness and can not describe refractory materials, 1580 DEG C is not absolute comprehensively.Now be defined as the material that all physicochemical property allow it to use in high temperature environments and be called refractory materials.Refractory materials is widely used in the industrial circles such as metallurgy, chemical industry, oil, machinofacture, silicate, power, and in metallurgical industry, consumption is maximum, accounts for the 50%-60% of ultimate production.

Carbon composite refractory is raw material by two kinds or two or more refractory oxide of different nature and carbon materials and non-oxidic material, the heterogeneous composite refractory of one that carbonaceous organic material is made as bonding agent.The oxide compound adopted mainly contains MgO, Al2O3, ZrO2 and MgAl2O4, carbon is natural graphite mainly, non-oxidized substance is mainly the metals such as Al, Si, Mg, the alloy of AlSi, AlMg class and SiC, B4C mono-compound of class, then in addition shaping by adding the bonding agent such as resin or pitch, the composite refractory be made up of oxide compound, carbon, non-oxygen compound and bonding agent can be obtained.

Summary of the invention

The object of the invention is just to provide a kind of tundish refractory materials and preparation method thereof.

The present invention is achieved by the following technical solutions:

A kind of tundish refractory materials, it is made up of the raw material of following weight parts:

Hydrogen peroxide 100-110, the terpine resin 4-7 of ammoniacal liquor 80-102,3-5% of asbolane 2-3, hexamethyl cyclotrisiloxane 0.1-0.17, paper fiber 2-3, phthalic ester 0.1-0.2, fast extrusion carbon black 30-37, magnesium nitride 6-10, borax 1-2, flax fiber 10-13, Glacial acetic acid 2-3, tetraethoxy 26-30,6-10%, forsterite powder 30-40, polyvinyl butyral acetal 1-2.

A preparation method for tundish refractory materials, comprises the following steps:

(1) hydrogen peroxide of the ammoniacal liquor of above-mentioned 6-10%, 3-5% is mixed, stir, obtain activation solution;

(2) borax is mixed with flax fiber, insulated and stirred 3-5 minute at 70-80 DEG C, join after cooling in activation solution, ultrasonic 4-5 minute, obtain fiber activation liquid;

(3) tetraethoxy is joined in 8-10 dehydrated alcohol doubly, stirring and dissolving, is added drop-wise in fiber activation liquid, after dropwising by lysate, add Glacial acetic acid, insulation reaction 10-12 hour at 40-45 DEG C, washs product with dehydrated alcohol and distilled water successively, filters, vacuum calcining: vacuum tightness is 8-10Pa, temperature rise rate is 80-100 DEG C/min, is incubated roasting 10-12h after being warmed up to 1200-1300 DEG C, obtains carbon silicon composite assistant;

(4) polyvinyl butyral acetal is joined in 3-4 times of dehydrated alcohol, stir, obtain alcohol lysate;

(5) paper fiber is joined in 10-14 times of water, after stirring, add hexamethyl cyclotrisiloxane, ultrasonic 2-3 minute, obtain silane fiber liquid;

(6) by terpine resin, phthalic ester mixing, add alcohol lysate, silane fiber liquid after stirring, 300-400 rev/min is stirred 10-20 minute, and dehydration, obtains resin glue;

(7) by asbolane, forsterite powder, magnesium nitride mixing, mixed rolling 20-30 minute, adds resin glue, mixed rolling 6-10 minute, add each raw material of residue, adjustment temperature is 80-90 DEG C, mixed rolling 16-20 minute, hot-forming, burn till under 1200-1400 DEG C of condition under buried charcoal atmosphere.

Compared with prior art, advantage of the present invention is:

Tetraethoxy of the present invention is silanol colloidal sol in the Water Under solution that catalyzer Glacial acetic acid adds, by silanol colloidal sol, the mixing of silica fibre activation solution, pass through evaporating solvent, obtain the heterocomplex of carbon, silicon, eventually pass high temperature cabonization, fiber activation liquid provides carbon source, obtains carbon silicon composite assistant, and the stable chemical performance of this carbon silicon composite assistant, thermal conductivity is high, thermal expansivity is little, resistance to thermal shock, lightweight, intensity is high;

Refractory materials of the present invention can bear the continuous pouring high-temperature molten steel of 24 hours erosion, wash away, there is good high temperature resistance, antistripping, scour resistance.

Embodiment

Below in conjunction with embodiment, the present invention is described in further detail:

Embodiment:

A kind of tundish refractory materials, it is made up of the raw material of following weight parts:

Hydrogen peroxide 110, terpine resin 4, forsterite powder 40, the polyvinyl butyral acetal 2 of the ammoniacal liquor 102,5% of asbolane 2, hexamethyl cyclotrisiloxane 0.17, paper fiber 3, phthalic ester 0.2, fast extrusion carbon black 37, magnesium nitride 10, borax 2, flax fiber 13, Glacial acetic acid 2, tetraethoxy 26,10%.

A preparation method for tundish refractory materials, comprises the following steps:

(1) by the ammoniacal liquor of above-mentioned 10%, 5% hydrogen peroxide mixing, stir, obtain activation solution;

(2) mixed with flax fiber by borax, at 80 DEG C, insulated and stirred 3 minutes, joins after cooling in activation solution, ultrasonic 4 minutes, obtains fiber activation liquid;

(3) tetraethoxy is joined in 8-10 dehydrated alcohol doubly, stirring and dissolving, is added drop-wise in fiber activation liquid, after dropwising by lysate, add Glacial acetic acid, insulation reaction 12 hours at 45 DEG C, washs product with dehydrated alcohol and distilled water successively, filters, vacuum calcining: vacuum tightness is 10Pa, temperature rise rate is 100 DEG C/min, is incubated roasting 12h after being warmed up to 1300 DEG C, obtains carbon silicon composite assistant;

(4) polyvinyl butyral acetal is joined in 3 times of dehydrated alcohols, stir, obtain alcohol lysate;

(5) paper fiber is joined in 10 times of water, after stirring, add hexamethyl cyclotrisiloxane, ultrasonic 2 minutes, obtain silane fiber liquid;

(6) by terpine resin, phthalic ester mixing, add alcohol lysate, silane fiber liquid after stirring, 400 revs/min are stirred 20 minutes, and dehydration, obtains resin glue;

(7) by asbolane, forsterite powder, magnesium nitride mixing, mixed rolling 20 minutes, adds resin glue, and mixed rolling 10 minutes adds each raw material of residue, and adjustment temperature is 90 DEG C, and mixed rolling 20 minutes is hot-forming, burns till under buried charcoal atmosphere under 1400 DEG C of conditions.

Performance test:

Refractory materials of the present invention is pressed GB/T13244 and detect oxidation-resistance (1000 DEG C × 3h), practical decarburized depth is 4.5mm; Detecting the heat-shock resistance of 1100 DEG C of water-cooleds by YB/T376.1, there is not crackle in the test that sample can stand 8 times; High temperature break resistant intensity is 7.8MPa.

Claims (2)

1. a tundish refractory materials, is characterized in that what it was made up of the raw material of following weight parts:

Hydrogen peroxide 100-110, the terpine resin 4-7 of ammoniacal liquor 80-102,3-5% of asbolane 2-3, hexamethyl cyclotrisiloxane 0.1-0.17, paper fiber 2-3, phthalic ester 0.1-0.2, fast extrusion carbon black 30-37, magnesium nitride 6-10, borax 1-2, flax fiber 10-13, Glacial acetic acid 2-3, tetraethoxy 26-30,6-10%, forsterite powder 30-40, polyvinyl butyral acetal 1-2.

2. a preparation method for tundish refractory materials as claimed in claim 1, is characterized in that comprising the following steps:

(1) hydrogen peroxide of the ammoniacal liquor of above-mentioned 6-10%, 3-5% is mixed, stir, obtain activation solution;

(2) borax is mixed with flax fiber, insulated and stirred 3-5 minute at 70-80 DEG C, join after cooling in activation solution, ultrasonic 4-5 minute, obtain fiber activation liquid;

(3) tetraethoxy is joined in 8-10 dehydrated alcohol doubly, stirring and dissolving, is added drop-wise in fiber activation liquid, after dropwising by lysate, add Glacial acetic acid, insulation reaction 10-12 hour at 40-45 DEG C, washs product with dehydrated alcohol and distilled water successively, filters, vacuum calcining: vacuum tightness is 8-10Pa, temperature rise rate is 80-100 DEG C/min, is incubated roasting 10-12h after being warmed up to 1200-1300 DEG C, obtains carbon silicon composite assistant;

(4) polyvinyl butyral acetal is joined in 3-4 times of dehydrated alcohol, stir, obtain alcohol lysate;

(5) paper fiber is joined in 10-14 times of water, after stirring, add hexamethyl cyclotrisiloxane, ultrasonic 2-3 minute, obtain silane fiber liquid;

(6) by terpine resin, phthalic ester mixing, add alcohol lysate, silane fiber liquid after stirring, 300-400 rev/min is stirred 10-20 minute, and dehydration, obtains resin glue;

(7) by asbolane, forsterite powder, magnesium nitride mixing, mixed rolling 20-30 minute, adds resin glue, mixed rolling 6-10 minute, add each raw material of residue, adjustment temperature is 80-90 DEG C, mixed rolling 16-20 minute, hot-forming, burn till under 1200-1400 DEG C of condition under buried charcoal atmosphere.