Standard of quality of brick of one class tall aluminium and technical index

March 15, 2024Nov 23, 2024

Standard of quality of brick of one class tall aluminium:

The regulation that this standard gives out according to GB/T 1.1-2009 is drafted.

This standard replaces GB/T 2988—2004 " tall aluminous brick " , compare with GB/T 2988—2004 photograph, main technique changes as follows:

—— is opposite YB/T 5015—1993 " blast furnace uses tall aluminous brick " , YB/T 5016—2000 " hot-blast stove uses tall aluminous brick " , YB/T 5017—2000 " brick of tall aluminium of be of use of steel-making electric stove " , YB/T 5020—2002 " Cheng Gang bucket uses tall aluminous brick " with YB/T 2988—2004 " tall aluminous brick " standard;

—— increased quota of series of low creep checker brick;

Brand of tall aluminous brick unites —— for LZ;

—— added name of LZ-70, LZ-75G, LZ-65G, LZ-55G;

—— revised apparent pore rate, heat the index such as intensity of compression of temperature of bate of permanent line change, loading, normal temperature;

—— raised the permissible variation in dimension of checker brick and exterior requirement;

—— edited partial dimension and exterior requirement;

—— limitted product manage to change the statistical meaning of quality character index, fetching acceptable quality is approved all be worth and standard deviation.

Standard place replaces all previous version of the standard to release a circumstance:

——GB/T 2988—1982, GB/T 2988—1987, GB/T 2988—2004.

1, limits

Program of assess of method of requirement of size of the classification that this standard provided tall aluminous brick, shape, technology, experiment, quality, pack, mark, carry, store reach quality certificate.

This standard applies to furnace of business lukewarm kiln to use common tall aluminous brick and low Fu become tall aluminous brick.

2, normative sex citation

The following file application to this file is indispensable. The citation that always fixes date, the version that records date only applies to this file. The citation that always does not fix date, its are newest version (include all modification sheet > apply to this file.

Size of shape of GB/T 2992.1 firebrick the 1st share is current brick

Density of refractory products volume, apparent pore leads GB/T 2997 compact figuration and method of true porosity experiment

Method of pressure test of compression of normal temperature of GB/T 5072 fireproof material

GB/T 5073 fireproof material presses creep experiment method

GB/T 5988 fireproof material heats method of experiment of permanent line change

GB/T 6900 aluminous silicon fastens method of fireproof data chemical analysis

GB/T 7321 figuration is fireproof method of goods sample preparation

Refractory products checks and accept GB/T 10325 figuration sampling inspection is regular

Refractory products measure, exterior reachs GB/T 10326 figuration the examination method of section

Refractory products packs GB/T 16546 figuration, mark, carry and store

Component of GB/T 20511 refractory products regulation

Method of experiment of temperature of bate of loading of YB/T 370 refractory products (blame show difference - warm up law)

YB/T 376.1 refractory products fights method of experiment of thermal shock sex (water is urgent cold law)

YB/T 2217 electric stove carries bricky shape size on the head with the ball

Bag of YB/T 4198 steel uses firebrick appearance measure

YB/T 5012 blast furnace and hot-blast stove use firebrick appearance measure

Roof of report of YB/T 5018 steel-making uses bricky appearance measure

3, term and definition

GB/T 10325 limits and following term and definition apply to this file.

3.1

Common tall aluminous brick

It is to show with to calcine alumina is the common high aluminous products with main firing raw material.

3.2

Brick of low creep tall aluminium

It is creep rate inferior firing high aluminous products.

4, classification and shape size

Cent of 4.1 tall aluminous bricks is common brick of tall aluminium of tall aluminous brick and low creep two kinds big.

4.2 common tall aluminous brick changes index cent to be normally: Brand of nine of LZ-48, LZ-55, LZ-65, LZ-70, LZ-75, LZ-80, LZ-55G, LZ-65G, LZ-75G. The L in the brand, Z is the initial of Chinese Phonetic Alphabet of aluminous, brick, the number is alumina quality mark, ever since G uses firebrick on behalf of blast furnace.

Brick of tall aluminium of 4.3 low creep changes index cent to be normally: DRL-155, DRL-150, DRL-145, DRL-140, DRL-135, DRL-130, DRL-127 7 brands. The D in the brand, R, L is initial of low, squirm, aluminous Chinese Phonetic Alphabet, the number leads the 1/10 of experiment temperature for creep.

The shape size of 4.4 firebrick should accord with the regulation of GB/T 2992.1, GB/T 20511, YB/T 2217, YB/T 4198, YB/T 5012 and YB/T 5018, the blueprint that Yi Ke just provides by Qian has production.

Tall aluminous brick is the siliceous aluminium simple finished product that contains Al2O3 48% above. What form according to mineral resources is different, cent of expensive simple finished product is corundum one corundum reachs qualitative, Molaishi character kinds silicon line Shi Zhisan is big. The AI2O3 content of corundum simple finished product is in 95% above, essential mineral resources is corundum (A12O3) , raw material is natural or artificial corundum, also have the finished product of electric frit corundum. The essential mineral resources of one corundum simple finished product is Mo Laishi Molaishi (3A12O3·2SiO2) , other pledge for stone of line of corundum and vitreous photograph, silicon.

Taste raw material to be silicon line stone (Al2O3·SiO2) , essential mineral resources is Molaishi and vitreous photograph character. On industry a lot of those who use is the tall aluminous brick with Molaishi and silicon line qualitative stone. Of the addition that follows Al2O3 content and vitreous photograph cut down, of finished product fireproof spend and be able to bear or endure urgent cold urgent hot sex all rises, the sex that fight broken bits increases to the mutinous ability of acid slag especially.

The principal raw material of tall aluminous brick is tall aluminous alumina, meantime place contains mineral resources to be given priority to with water aluminous stone, Bomeishi, kaolinite. Tall aluminous alumina passes to calcine, each mineral resources is in different temperature is changed early or late for corundum and Mo Laishi crystal. Fall in 1400-1500 ℃ temperature, union not comes to corundum and quartz 2 times petrifaction, crystal development is grown. Match soft qualitative unripe clay to make bond again in tall aluminous grog. Of tall aluminous brick produce technology and argillaceous brick are essential and same.

Function of great majority of tall aluminous brick excel clay brick, only thermal stability is a bit lower than argillaceous brick. Those who follow Al2O3 content is different, common cent of tall aluminous brick is 3 kinds of brand: (LZ)—65, (LZ)—55, (LZ)—48.

Because the first part AL2O3 of tall aluminous brick is bisexual oxide, corrode to what acidity reachs basic slag all can revolt, to ferric oxide skin corrode also have sure revolt capacity. Reason is commonly used come build by laying bricks or stones builds vault of exit of boiler setting of soaking furnace hearth, bottom, waste gas, on successional heating furnace, top of brick of hearth, boiler setting, burner, condole can use build by laying bricks or stones of tall aluminous brick to build. Tall aluminous brick is commonly used also will serve as checker brick, repair regenerator of build by laying bricks or stones.

The share that in industry the place in fireproof material gross holds advanced country is tall aluminous brick about 8—14% , capital of alumina of Chinese tall aluminium is rich and generous, those who be tall aluminous brick begin hair palpability advantage.

Index of technology of brick of one class tall aluminium:

Name

Brick of one class tall aluminium

LZ-75

AL2O3 %≥

75

Fe203 % <

2.5

Bulk density G/cm2

2.5

MPa > of intensity of normal temperature compression

70