CN104892011A

CN104892011A - Preparation method of dolomite refractory brick

Info

Publication number: CN104892011A
Application number: CN201510273535.0A
Authority: CN
Inventors: 张开亿; 王嘉龙; 冯娟
Original assignee: Court Of A Feudal Ruler Liuzhou City Hundred Million Trade LLC
Current assignee: Court Of A Feudal Ruler Liuzhou City Hundred Million Trade LLC
Priority date: 2015-05-26
Filing date: 2015-05-26
Publication date: 2015-09-09

Abstract

The invention discloses a preparation method of a dolomite refractory brick and relates to the technical field of refractory material manufacturing. The dolomite refractory brick comprises the following raw materials in parts by weight: 60 to 70 parts of dolomite, 10 to 15 parts of pyrophyllite powder, 20 to 30 parts of magnesia and 8 to 15 parts of paper pulp. The dolomite refractory brick is prepared by the steps of calcining and crushing the dolomite, batching, mixing, preparing blanks, drying and sintering. Compared with the prior art, the dolomite refractory brick prepared by the method does not shrink at high temperature, does not crack under the condition of greatly changed temperature, has high acid and alkali erosion resistance, is insusceptible to acid and alkali erosion so as not to be damaged, and has long service life.

Description

The preparation method of dolomite brick

Technical field

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

Background technology

In industrial production, many Thermal Equipments need with refractory brick, as the furnace lining of cement rotary kiln, converter, the furnace bottom of open hearth need the refractory brick that high temperature resistant, antiacid alkali erosiveness energy is good, and the refractory brick resistance to elevated temperatures that existing method is produced is good, but antiacid alkali erosiveness can be poor, easily be subject to soda acid corrode and 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 dolomite brick, and the antiacid alkali erosiveness of refractory brick produced to solve existing method can be poor, is easily subject to soda acid and corrodes and the problem of damage.

In order to solve the problem, the technical solution used in the present invention is: the preparation method of this dolomite brick, comprises the raw material of following weight part: rhombspar 60 parts ~ 70 parts, pyrophyllite in powder 10 parts ~ 15 parts, 20 parts ~ 30 parts, magnesia, paper pulp 8 parts ~ 15 parts;

Operation steps is as follows:

A. rhombspar, pyrophyllite in powder, magnesia, paper pulp is taken by the weight part of above-mentioned each raw material, for subsequent use;

B. described rhombspar is put into calcination kiln, sinter at 1600 DEG C ~ 1700 DEG C temperature, then make dolomite fines with pulverizer;

C. described dolomite fines and described pyrophyllite in powder are put into mixer, add the water of described dolomite fines and described pyrophyllite in powder gross weight 1.5% ~ 2%, mixing 3min ~ 5 min, then add described magnesia and described paper pulp, fully mix, obtain compound;

D. adopt brick pressing machine by the compression moulding of step c gained compound, make adobe;

E. adobe at the temperature of 80 DEG C ~ 100 DEG C dry 2 days ~ 3 days, then puts into calcining kiln, sinters, obtain this dolomite brick at 1400 DEG C ~ 1500 DEG C.

In preparation method's technical scheme of above-mentioned dolomite brick, technical scheme can also be more specifically: described magnesia is caustic-calcined magnesite.

Described rhombspar is carbonate minerals, and its crystalline structure, as calcite, is often rhombohedron; Can be used for building materials, pottery, glass and refractory materials, chemical industry and agricultural, environmental protection, the field such as energy-conservation.

Described pyrophyllite, is a kind of softer silicate minerals, has waxy luster, and hand is touched has satiny sensation.Decompose gradually 1100 ~ 1300 DEG C time, form mullite phase and the cristobalite phase of high-temperature stable, its industrial use widely, can do the subsidiary material of refractory materials, pottery, electroceramics, crucible, glass fibre, rubber, papermaking.

Described magnesia, main component is magnesium oxide, changes stable cubic system into, be commonly called as periclasite after heat, is one of most important raw material of refractory materials; Light-burning magnesium powder is anti-folding, withstand voltage, high strength, air hardening, gelling material, can do high-temperature refractory, can make mold type in mechanical industry.

Described paper pulp take vegetable fibre as raw material, and through the fibrous material that different processing methods is obtained, the main component forming fiber in paper pulp is Mierocrystalline cellulose, also has hemicellulose, lignin, resin, pigment, pectin and ash in various degree to grade material in addition.

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

The present invention adopts rhombspar to be main raw material, pyrophyllite is auxiliary material, magnesia and paper pulp are bonding agent, rhombspar is pulverized through calcination, by batching, batch mixing, base, drying, burns till dolomite brick, does not shrink under this dolomite brick high temperature, not cracked under jump in temperature condition, antiacid alkali erosiveness can be strong, is not vulnerable to soda acid and corrodes and damage, long service life.

Embodiment

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

Embodiment 1

A preparation method for dolomite brick, comprises the raw material of following weight part: rhombspar 600 kilograms, pyrophyllite in powder 100 kilograms, 200 kilograms, magnesia, paper pulp 80 kilograms; The magnesia of the present embodiment is caustic-calcined magnesite.

Operation steps is as follows:

A. rhombspar, pyrophyllite in powder, caustic-calcined magnesite, paper pulp is taken by the weight part of above-mentioned each raw material, for subsequent use;

B. rhombspar is put into calcination kiln, sinter at 1600 DEG C of temperature, then make dolomite fines with pulverizer;

C. dolomite fines and pyrophyllite in powder are put into mixer, add the water of dolomite fines and pyrophyllite in powder gross weight 1.5%, mixing 3min, then add caustic-calcined magnesite and paper pulp, fully mix, obtain compound;

E. adobe at the temperature of 80 DEG C dry 2 days, then puts into calcining kiln, sinters, obtain this dolomite brick at 1400 DEG C.

Embodiment 2

A preparation method for dolomite brick, comprises the raw material of following weight part: rhombspar 700 kilograms, pyrophyllite in powder 150 kilograms, 300 kilograms, magnesia, paper pulp 150 kilograms; The magnesia of the present embodiment is caustic-calcined magnesite.

Operation steps is as follows:

B. rhombspar is put into calcination kiln, sinter at 1700 DEG C of temperature, then make dolomite fines with pulverizer;

C. dolomite fines and pyrophyllite in powder are put into mixer, add the water of dolomite fines and pyrophyllite in powder gross weight 2%, mixing 5min, then add caustic-calcined magnesite and paper pulp, fully mix, obtain compound;

E. adobe at the temperature of 100 DEG C dry 3 days, then puts into calcining kiln, sinters, obtain this dolomite brick at 1500 DEG C.

Claims

1. a preparation method for dolomite brick, is characterized in that the raw material comprising following weight part: rhombspar 60 parts ~ 70 parts, pyrophyllite in powder 10 parts ~ 15 parts, 20 parts ~ 30 parts, magnesia, paper pulp 8 parts ~ 15 parts;

Operation steps is as follows:

2. the preparation method of dolomite brick according to claim 1, is characterized in that: described magnesia is caustic-calcined magnesite.