CN103304246A - Regenerative type low-carbon corundum spinel impacting plate and preparation method thereof - Google Patents

Abstract

The invention belongs to the technical field of refractory appliances, and in particular relates to a regenerative type low-carbon corundum spinel impacting plate and a preparation method thereof. The invention discloses the regenerative type low-carbon corundum spinel impacting plate comprising the following components in percentage by weight: 20-40 percent of waste magnesia carbon bricks or a spinel carbon waste brick regeneration material, 30-45 percent of brown fused alumina, 15-35 percent of spinel, 0.1-5 percent of calcined alumina micropowder, 2-6 percent of silicon carbide powder, 1-5 percent of aluminum powder, 5-18 percent of fused magnesia, 0.1-2 percent of high-temperature asphalt powder and 3-3.5 percent of phenolic resin. The regenerative type low-carbon corundum spinel impacting plate has the effects of solving the problems that an impacting plate for a tundish is short and unstable in service life and pollutes molten steel, and greatly improving the service life of the impacting plate for a laddle.

Description

A kind of regenerative low-carbon corundum spinelle matter strike plate and preparation method thereof

Technical field

The invention belongs to fire-resistant apparatus technical field, relate in particular to a kind of regenerative low-carbon corundum spinelle matter strike plate and preparation method thereof.

Background technology

Middle bag mainly uses with the low-carbon corundum spinelle strike plate and waters steel impact zone position when the steelworks basket pouring, plays the opposing molten steel and impact, wash away in middle bag, the effect of protection impact site.

The middle bag strike plate that present steel industry generally adopts has 3 kinds, be respectively magnesia carbon brick and Al2O3MgOC Bricks and carbon free precast block, long and the not high factor of cost performance is not used in a large number because of the low in addition production cycle in carbon free precast block work-ing life, and magnesia carbon brick and Al2O3MgOC Bricks are when Pour Steel, larger because deteriorating, molten steel is caused certain pollution, and wherein especially be not suitable for smelting excellent special steel kind because carbon content is higher.

Corundum spinel refractory materials is owing to having good fire performance after research and testing, in this field specific function is arranged, in addition since ladle with rear magnalium carbon and the aluminate carbon brick that gives up, after use, has volume stability better, so the characteristics that part fire performance in the material increases are from service requirements and resource regeneration aspect.We work out a kind of new middle bag strike plate and are used for satisfying the requirement that contemporary China's Iron and Steel Production is smelted.

Summary of the invention

The object of the invention is to solve above-described technical problem, a kind of regenerative low-carbon corundum spinelle matter strike plate and preparation method thereof is provided, its technical scheme is as follows:

A kind of regenerative low-carbon corundum spinelle matter strike plate is characterized in that, is comprised of following component and weight percent:

Aluminium scrap magnesia carbon brick or spinel carbon brick reworked material: the 20-40% that gives up;

Palm fibre corundum: 30-45%; Spinel: 15-35%;

Calcined polishing aluminum oxide micro mist: 0.1-5%; Carborundum powder: 2-6%;

Aluminium powder: 1-5%; Electrosmelted magnesite clinker: 5-18%;

Hard pitch powder: 0.1-2%; Resol: 3-3.5%.

The preparation method of regenerative low-carbon corundum spinelle matter strike plate, its step is as follows:

1): the processing of aluminium scrap magnesia carbon brick and spinel carbon brick: the useless brick alterated layer that sorting is rejected is as other refractory materials, and useless brick is broken into the following particle of 10 mm through equipment such as the broken pair rollers of the blade of a sword with it;

2): then through the equipment compacting of mixing, utilize pressure with the further broken pulverizing of the low false particle of part intensity in the process of mixing, after 24 hours, enter the hammer mill secondary breaking at ageing mixture; Through oven dry, the volatilization such as raw material inner material additive is gone out, the formation reworked material also is sieved into particle and fine powder;

3): weighing: accurately press the various raw materials of proportioning weighing with balance.

4): mix: the particles such as load weighted regenerated granule, brown corundum and electrosmelted magnesite clinker were put into the forced stirrer stirring after 2 minutes, adding resol stirred 5-10 minute, then again fine powder adding, stirred 3-5 minute, at last other material is all added, stir discharging behind the rear formation pug more than 25 minutes;

5): moulding: with on the mixed pug 630 tons with the pressurizing machine moulding, form work in-process.

6): dry baking: after work in-process are placed 48 hours naturally, advance 200 ℃ in baking oven and toast by heating curve and got final product in 36 hours.

The useless brick reworked material of wherein said aluminium scrap magnesium carbon or spinel carbon is the waste after using from ladle, and through particle and the fine powder object that Physical Processing forms, major function is to improve refractoriness and the high volume stability of strike plate.

Described brown corundum major function is to improve hot strength and the corrosion resistance of strike plate.

Major function is to improve the thermal shock resistance of strike plate and anti-erosion and the impermeabilisation ability of volume stability and brick in the described spinel.

Described Calcined polishing aluminum oxide micro mist mainly be with strike plate in magnesium oxide reaction, to generate In-suit spinel, further improve brick intensity and thermal shock resistance.

Described electrosmelted magnesite clinker is that reaction generates In-suit spinel with alumina powder, regulates simultaneously the coefficient of expansion of strike plate.

Described aluminium powder is mainly oxidation inhibitor, prevents the oxidation of carbon in the plate, and the reaction of other material further improves the hot strength of brick after the oxidation and in the plate.

Described carborundum powder: be mainly oxidation inhibitor, prevent the oxidation of carbon in the plate.

Described hard pitch powder: be mainly the reduction void content, improve shock-resistance.

Produce an effect of the present invention is: solved middle bag not high unstable and there is a difficult problem of polluting in molten steel with the strike plate life-span, greatly improved middle bag and use strike plate work-ing life, can adapt to the smelting of multiple iron and steel kind, the quality of assurance iron and steel kind.Play simultaneously the efficient effect that utilizes and protect social environment of resource recovery.

Embodiment

The below specifies embodiment:

1. raw-material preparation

Aluminium scrap magnesia carbon brick or the spinel carbon brick reworked material that gives up: 32%, brown corundum: 42%

Spinel: 10%, Calcined polishing aluminum oxide micro mist: 2%

Aluminium powder: 1%, carborundum powder: 3%

Electrosmelted magnesite clinker: 6%, hard pitch powder: 1%

Resol: 3%

2. preparation

1): the processing of aluminium scrap magnesia carbon brick and spinel carbon brick: the useless brick alterated layer that sorting is rejected is as other refractory materials, and useless brick is broken into the following particle of 10 mm through equipment such as the broken pair rollers of the blade of a sword with it;

2): then through the equipment compacting of mixing, utilize pressure with the further broken pulverizing of the low false particle of part intensity in the process of mixing, after 24 hours, enter the hammer mill secondary breaking at ageing mixture; Through oven dry, the volatilization such as raw material inner material additive is gone out, the formation reworked material also is sieved into particle and fine powder;

3): weighing: accurately press the various raw materials of proportioning weighing with balance.

4): mix: the particles such as load weighted regenerated granule, brown corundum and electrosmelted magnesite clinker were put into the forced stirrer stirring after 2 minutes, adding resol stirred 5 minutes, then again fine powder adding, stirred 5 minutes, at last other material is all added, stir discharging behind the rear formation pug more than 25 minutes;

5): moulding: with on the mixed pug 630 tons with the pressurizing machine moulding, form work in-process.

6): dry baking: after work in-process are placed 48 hours naturally, advance 200 ℃ in baking oven and toast by heating curve and got final product in 36 hours.

Claims (2)

1. a regenerative low-carbon corundum spinelle matter strike plate is characterized in that, is comprised of following component and weight percent:

Aluminium scrap magnesia carbon brick or spinel carbon brick reworked material: the 20-40% that gives up;

Palm fibre corundum: 30-45%; Spinel: 15-35%;

Calcined polishing aluminum oxide micro mist: 0-5%; Carborundum powder: 2-6%;

Aluminium powder: 1-5%; Electrosmelted magnesite clinker: 5-18%;

Hard pitch powder: 0.1-2%; Resol: 3-3.5%.

2. the preparation method of regenerative low-carbon corundum spinelle matter strike plate as claimed in claim 1 is characterized in that, its step is as follows:

1): the processing of aluminium scrap magnesia carbon brick and spinel carbon brick: the useless brick alterated layer that sorting is rejected is as other refractory materials, and useless brick is broken into the following particle of 10 mm through equipment such as the broken pair rollers of the blade of a sword with it;

2): then through the equipment compacting of mixing, utilize pressure with the further broken pulverizing of the low false particle of part intensity in the process of mixing, after 24 hours, enter the hammer mill secondary breaking at ageing mixture; Through oven dry, the volatilization such as raw material inner material additive is gone out, the formation reworked material also is sieved into particle and fine powder;

3): weighing: accurately press the various raw materials of proportioning weighing with balance;

4): mix: the particles such as load weighted regenerated granule, brown corundum and electrosmelted magnesite clinker were put into the forced stirrer stirring after 2 minutes, adding resol stirred 5-10 minute, then again fine powder adding, stirred 3-5 minute, at last other material is all added, stir discharging behind the rear formation pug more than 25 minutes;

5): moulding: with on the mixed pug 630 tons with the pressurizing machine moulding, form work in-process;

6): dry baking: after work in-process are placed 48 hours naturally, advance 200 ℃ in baking oven and toast by heating curve and got final product in 36 hours.