CN104876607A

CN104876607A - Manufacturing method of refractory brick for boiler

Info

Publication number: CN104876607A
Application number: CN201510286107.1A
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: 2015-09-02

Abstract

The invention discloses a manufacturing method of a refractory brick for a boiler and relates to the technical field of manufacturing of refractory materials. The refractory brick comprises, by weight, 30-40 parts of calcined bauxite, 20-30 parts of mullite powder, 10-20 parts of quartz sand, 8-12 parts of Guangxi clay and 2-3 parts of calcium aluminate cement. The manufacturing method includes preparing the materials, blending, ageing, making blank, drying and baking. Compared with the prior art, the refractory brick for the boiler is good in heat resistance, insulation and sealing property and high in compression strength and is not easy to burn when used in the boiler, and service life is prolonged.

Description

The preparation method of boiler refractory brick

Technical field

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

Background technology

Burned flame in boiler and each heating surface are hedged off from the outer world by boiler refractory brick, therefore refractory brick used requires to have thermotolerance, thermal insulation and stopping property, compressive strength is high, and refractory brick thermotolerance, thermal insulation and the good airproof performance produced at present, but compressive strength is lower, use as boiler refractory brick and easily damage, 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 boiler refractory brick, with the problem that the refractory brick compressive strength solving production is at present lower.

In order to solve the problem, the technical solution used in the present invention is: the preparation method of this boiler refractory brick, comprises the raw material of following weight part: bauxite clinker 30 parts ~ 40 parts, mullite powder 20 parts ~ 30 parts, quartz sand 10 parts ~ 20 parts, Guangxi clay 8 parts ~ 12 parts, aluminous cement 2 parts ~ 3 parts;

Operation steps is as follows:

A. bauxite clinker, mullite powder, quartz sand, Guangxi clay, aluminous cement is taken by the weight part of above-mentioned each raw material, for subsequent use;

B. described bauxite clinker, described mullite powder, described quartz sand are put into the mixing 3min ~ 5min of sand mill, then described Guangxi clay and the mixing 2min ~ 3min of water accounting for raw material gross weight 3% ~ 4% is added, add described aluminous cement again, mixing 8min ~ 12min, obtains compound;

C. described compound carries out ageing mixture 2 days ~ 3 days;

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

E. described adobe at 80 DEG C ~ 100 DEG C temperature dry 2 days ~ 3 days, then puts into calcining kiln at the roasting temperature 6 hours ~ 8 hours of 1350 DEG C ~ 1400 DEG C, is cooled to room temperature and namely obtains this boiler 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 mullite is the mineral that aluminosilicate at high temperature generates, have high temperature resistant, intensity high thermal conductivity coefficient is little, the features such as energy-saving effect is remarkable, mullite ore deposit be used to produce high-temperature refractory.

Described quartz sand, it is the quartz particles that quartzite processes through fragmentation, quartzite is a kind of silicate minerals of hard, wear-resisting, stable chemical performance, its main mineral constituent is SiO2, quartz sand is important industrial mineral raw material, is widely used in the industry such as glass, casting, pottery and refractory materials, smelting duriron, flux for metallurgy, metallurgy, building.

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, mullite, quartz sand to be main raw material, Guangxi clay and water glass are bonding agent, through batching, batch mixing, ageing mixture, base, drying, fire boiler refractory brick, this refractory brick thermotolerance, thermal insulation and good airproof performance, and compressive strength reaches 35MPa ~ 40MPa, be not easy to damage as boiler refractory brick, work-ing life improves.

Embodiment

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

Embodiment 1

A preparation method for boiler refractory brick, comprises the raw material of following weight part: bauxite clinker 300 kilograms, mullite powder 200 kilograms, quartz sand 100 kilograms, Guangxi clay 80 kilograms, aluminous cement 20 kilograms;

Operation steps is as follows:

B. bauxite clinker, mullite powder, quartz sand are put into the mixing 3min of sand mill, then add Guangxi clay and the mixing 2min of water accounting for raw material gross weight 3%, then add aluminous cement, mixing 8min, obtains compound;

C. compound carries out ageing mixture 2 days;

E. adobe at 80 DEG C of temperature dry 2 days, then puts into calcining kiln at the roasting temperature 6 hours of 1350 DEG C, is cooled to room temperature and namely obtains this boiler refractory brick.

Embodiment 2

A preparation method for boiler refractory brick, comprises the raw material of following weight part: bauxite clinker 400 kilograms, mullite powder 300 kilograms, quartz sand 200 kilograms, Guangxi clay 120 kg, aluminous cement 30 kilograms;

Operation steps is as follows:

B. bauxite clinker, mullite powder, quartz sand are put into the mixing 5min of sand mill, then add Guangxi clay and the mixing 3min of water accounting for raw material gross weight 4%, then add aluminous cement, mixing 12min, obtains compound;

C. compound carries out ageing mixture 3 days;

E. adobe at 100 DEG C of temperature dry 3 days, then puts into calcining kiln at the roasting temperature 8 hours of 1400 DEG C, is cooled to room temperature and namely obtains this boiler refractory brick.

Claims

1. a preparation method for boiler refractory brick, is characterized in that the raw material comprising following weight part: bauxite clinker 30 parts ~ 40 parts, mullite powder 20 parts ~ 30 parts, quartz sand 10 parts ~ 20 parts, Guangxi clay 8 parts ~ 12 parts, aluminous cement 2 parts ~ 3 parts;

Operation steps is as follows:

C. described compound carries out ageing mixture 2 days ~ 3 days;