CN104944979A

CN104944979A - Preparation method of firebrick used for rotary kiln

Info

Publication number: CN104944979A
Application number: CN201510286075.5A
Authority: CN
Inventors: 梁运富
Original assignee: Liuzhou Pu Ya Trade Co Ltd
Current assignee: Liuzhou Pu Ya Trade Co Ltd
Priority date: 2015-05-29
Filing date: 2015-05-29
Publication date: 2015-09-30

Abstract

The invention discloses a preparation method of a firebrick used for a rotary kiln, which relates to the technical field of refractory material manufacture. The firebrick comprises the following raw materials by weight part: 30-40 parts of alumina clinker, 15-25 parts of magnesium aluminate spinel powder, 10-20 parts of silicon carbide powder, 10-15 parts of Guangxi clay and 4-6 parts of calcium aluminate cement. The firebrick is prepared by processes of burdening, mixing the materials, kneading, making a blank, drying, and sintering. Compared with prior art, the firebrick has the advantages of high temperature resistance, corrosion resistance, anti-thermal shock, good shock resistance, no crack generation while in use, and increased service life.

Description

The preparation method of rotary kiln refractory brick

Technical field

The present invention relates to refractory materials manufacturing technology field, especially a kind of preparation method of rotary kiln refractory brick.

Background technology

Rotary kiln refractory brick not only will bear high temperature impact, also to bear the fretting wear of material, kiln body rotates the stress etc. produced, therefore refractory brick used requires high temperature resistant, corrosion-resistant, anti-thermal shock and shock resistance good, and the refractory brick produced at present is high temperature resistant, corrosion-resistant, but anti-thermal shock and shock resistance poor, as rotary kiln refractory brick use easily occur that crackle damages, work-ing life is short.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of preparation method of rotary kiln refractory brick, to solve the problem of refractory brick anti-thermal shock and the shock resistance difference of producing at present.

In order to solve the problem, the technical solution used in the present invention is: the preparation method of this rotary kiln refractory brick, comprises the raw material of following weight part: bauxite clinker 30 parts ~ 40 parts, magnesium aluminium spinel powder 15 parts ~ 25 parts, carborundum powder 10 parts ~ 20 parts, Guangxi clay 10 parts ~ 15 parts, aluminous cement 4 parts ~ 6 parts;

Operation steps is as follows:

A. bauxite clinker, magnesium aluminium spinel powder, carborundum powder, Guangxi clay, aluminous cement is taken by the weight part of above-mentioned each raw material, for subsequent use;

B. described bauxite clinker, described magnesium aluminium spinel powder, described carborundum powder are put into the mixing 3min ~ 5min of sand mill, then the mixing 2min ~ 3min of described aluminous cement is added, add described Guangxi clay and the water accounting for raw material gross weight 3% ~ 5% again, mixing 10min ~ 15min, obtains compound;

C. described compound carries out ageing mixture 3 days ~ 5 days;

D. adopt brick pressing machine that step c gained compound is pressed into adobe;

E. described adobe at 90 DEG C ~ 120 DEG C temperature dry 1 day ~ 2 days, then puts into calcining kiln at the roasting temperature 6 hours ~ 8 hours of 1480 DEG C ~ 1560 DEG C, is cooled to room temperature and namely obtains this rotary kiln refractory brick.

Described bauxite clinker, is called for short high aluminium material, the various high alumina bricks manufactured with its grog, is metallurgical industry and the widely used fire-resistant or impregnating material of other industry.

Described magnesium-aluminium spinel, has good thermal shock resistance energy, chemistry-resistant characteristic, can keep good stability in oxidation or reducing atmosphere.

Described silicon carbide, formed by resistance furnace pyrotic smelting with raw materials such as quartz sand, refinery coke (or coal tar), wood chips, its stable chemical performance, thermal conductivity are high, thermal expansivity is little, wear resisting property is good, in order to the high grade refractory made, resistance to thermal shock, volume are little, lightweight and intensity is high, good energy-conserving effect.

Described Guangxi clay, it is the soft flame-proof clay that a kind of plasticity-is good, its granularity is superfine, the loose property of leaching and cohesiveness also fine, sintering range is wide, containing kaolinite often more than 70%, and based on disordered kaolinite, can significantly increase its plasticity-and folding strength, be high-quality bonding clay used for refractory material.

Described aluminous cement, it coordinates by a certain percentage with calcium carbonate (Wingdale) with natural bauxitic clay or commercial alumina, makes, in refractory materials, be commonly used for bonding agent through calcining or electric smelting.

Owing to have employed technique scheme, the present invention compared with prior art has following beneficial effect:

The present invention adopts bauxite clinker, magnesium-aluminium spinel, silicon carbide to be main raw material, Guangxi clay and aluminous cement are bonding agent, through batching, batch mixing, ageing mixture, base, drying, fire rotary kiln refractory brick, this refractory brick is high temperature resistant, corrosion-resistant, anti-thermal shock and shock resistance good, use as rotary kiln refractory brick and be not easy to occur that crackle damages, work-ing life improves.

Embodiment

Below in conjunction with specific embodiment, the invention will be further described:

Embodiment 1

A preparation method for rotary kiln refractory brick, comprises the raw material of following weight part: bauxite clinker 300 kilograms, magnesium aluminium spinel powder 150 kilograms, carborundum powder 100 kilograms, Guangxi clay 100 kilograms, aluminous cement 40 kilograms;

Operation steps is as follows:

B. bauxite clinker, magnesium aluminium spinel powder, carborundum powder are put into the mixing 3min of sand mill, then add the mixing 2min of aluminous cement, then add Guangxi clay and the water accounting for raw material gross weight 3%, mixing 10min, obtains compound;

C. compound carries out ageing mixture 3 days;

E. adobe at 90 DEG C of temperature dry 1 day, then puts into calcining kiln at the roasting temperature 6 hours of 1480 DEG C, is cooled to room temperature and namely obtains this rotary kiln refractory brick.

Embodiment 2

A preparation method for rotary kiln refractory brick, comprises the raw material of following weight part: bauxite clinker 400 kilograms, magnesium aluminium spinel powder 250 kilograms, carborundum powder 200 kilograms, Guangxi clay 150 kilograms, aluminous cement 60 kilograms;

Operation steps is as follows:

B. bauxite clinker, magnesium aluminium spinel powder, carborundum powder are put into the mixing 5min of sand mill, then add the mixing 3min of aluminous cement, then add Guangxi clay and the water accounting for raw material gross weight 5%, mixing 10min, obtains compound;

C. compound carries out ageing mixture 5 days;

E. adobe at 120 DEG C of temperature dry 2 days, then puts into calcining kiln at the roasting temperature 8 hours of 1560 DEG C, is cooled to room temperature and namely obtains this rotary kiln refractory brick.

Claims

1. a preparation method for rotary kiln refractory brick, is characterized in that the raw material comprising following weight part: bauxite clinker 30 parts ~ 40 parts, magnesium aluminium spinel powder 15 parts ~ 25 parts, carborundum powder 10 parts ~ 20 parts, Guangxi clay 10 parts ~ 15 parts, aluminous cement 4 parts ~ 6 parts;

Operation steps is as follows:

C. described compound carries out ageing mixture 3 days ~ 5 days;