Firebrick cubic metre counts computational method
1,
Bricky mark dimension is 230mm×114mm×65mm, so a several =1 /0.23×0.114×0.065=586.75 of every stere or so, [Note: This is to did not consider the ash between brick and brick to seam a circumstance, if want to consider ash to seam, seam ash dimension to consider to go up can, its computation formula is: 1 / (ash of mortar of connective of photograph of single block of 0.23×0.114×0.065 ＋ block seams bulk) .
2,
The accuracy of the validity of fireproof material appearance and dimension builds the close sex of body to have immediate effect to electric stove build by laying bricks or stones, and the service life that build by laying bricks or stones builds the close sex of body to deciding build by laying bricks or stones to build system greatly. The brick is seamed be being built in build by laying bricks or stones is the most fragile in body the part with the easiest attaint, the photograph that be the same as a brick is compared, the density that the brick seams and intensity want a lot of smaller, accordingly it dissolves more easily in broken bits. Seam in thick brick in, cohere material is being used warm up the brick that its place cohere can break away from because of systole in the process, and meeting disintegrate becomes its itself piece drop come down, this enlarged slaggy and gentle style to be accumulated with the interface of goods, weaken the sex fighting broken bits of whole liner and heatproof shake sex thereby. So, the correct figure of refractory products and exact size also are measured to make a when taste quality main index by regard as.
3, the sort that presses goods normally and use condition are different, the regulation has dimension public errand, twist to be out of shape, the top limit of the blemish such as fusion hole of horn of the oar that lack an edge, crackle,
Production appearance is mixed correctly the goods with exact size, especially old abnormity product, it is a complex task in production. Of raw material property not stable, and violate definite craft system
And violate definite craft system
Be like raw material deserve to compare, moisture of grain composition, preform, shape size of shape of model of pressure, brick and 10 dry are firing the system
Be like raw material deserve to compare, moisture of grain composition, preform, shape size of shape of model of pressure, brick and 10 dry are firing the system
, the appearance that can create product is incorrect forbid with dimension truly.
4, of the appearance validity of refractory products and dimension accuracy carry
Tall
Concern with following element more, if the mechanization of each parts mixes the improvement of process, process,automation and necessary production examine etc.
5, the high temperature performance characteristics that uses fireproof material to basically consider it. Structure of the chemical and mineral composition that the underlying factor that affects performance characteristics is fireproof material, organization and content reason are simple
;
Exterior because all alone is temperature,Zha of change, frit is eroded, loading, mechanical wear. These affect the service life of body of build by laying bricks or stones of Chinese trumpet creeper directly. Accordingly, metallurgy industry puts forward to fireproof material
“
3 be able to bear or endure, 3 small, two good
”
strict requirement.
“
3 be able to bear or endure
”
Namely high temperature resistant
Namely high temperature resistant
Include to be able to bear or endure the wave motion of temperature
Include to be able to bear or endure the wave motion of temperature
, be able to bear or endure erode, compression.
“
3 small
”
Namely porosity is small,
I:
Burn systole dimension common difference is small, little
Burn systole dimension common difference is small, little
Real measure and standard measure poor value call firebrick dimension public errand, the comparison of the system of furnace build by laying bricks or stones that the firebrick with dimension little common difference builds is neat
The comparison of the system of furnace build by laying bricks or stones that the firebrick with dimension little common difference builds is neat
.
“
Two good
”
Namely firebrick appearance is good
Namely firebrick appearance is good
Without vertex damage, lack an edge
Without vertex damage, lack an edge
, section is good
Section is good
Constituent structure is even
Constituent structure is even
.
6, make choice of after some kind of fireproof material, use correct was payoff. Strict requirement wants on the operation, for example when drying-out, abide by strictly warm up system, avoid what fireproof material creates when temperature change is too big to destroy, notice to create good condition from beginning to end, maintain the good performance of firebrick, enhance its service life.
Firebrick price is affected
1, on April 1, 2019, manufacturing industry the tax rate of 16% falls 13% , announced in the government after to whole production industry the duty with this one good profit changes policy, whether does fireproof raw material, fireproof material depreciate the topic that becomes downstream industry to pay close attention to most. But fall duty is equal to depreciate, believe everybody also sees a lot of be able to bear or endure lumber company also issued the announcement that about falling duty does not depreciate or announcement document.
2, the price of fireproof raw material and brick of fireproof finished product takes the part situation.
Magnesia:
Magnesia price all the time since company of downstream and fireproof data pays close attention to very much, april, magnesia price is uneven, company quoted price is confused. Its are main the reason depends on 1, problem of quality of little;3 of demand of market of reduction of output of market stock big;2, steelworks, product.
As a result of afore-mentioned reasons, even if appeared electric frit mixes big Shi Qiao to burn an enterprise again many stop production, also did not cause an effect to magnesia price.
The proposal purchases the user of magnesia, when buying magnesia product, need notes the time of stock keep long in stock of the product. Long inventory may cause magnesia content to reduce. In the meantime, hearsay says, the mine of area of the Liaoning after July should undertake stop production is rectified, whether can affect price of later period magnesia.
Aluminium of and other places of Shanxi, Guizhou is aluminous this month integral quoted price is relatively stable. With Shanxi aluminium alumina is exemple, industry of region of smooth a few days ago Yao mostly stop production, environmental protection branch asks the enterprise installs online monitoring. Interpose rests region industry is produced normally, the message says interpose rested on April 20 online monitoring allows area demand company entirely and net, do not amount to the enterprise of mark to environmental protection, the requirement installs desulphurization to take off saltpetre equipment.
Henan area, Shandong area is white this month although corundum enterprise is produced opposite relatively stable, but inside the market still supply of goods is nervous. In light of the company quoted price that gets this month, at present white corundum price did not get alumina price and fall tax impact.
Payoff of firebrick manufacturer price
The manufacturing proprietor of an enterprise of tall aluminous brick and argillaceous brick should be in Henan area centrally, with be closely newly exemple, problem of local company environmental protection is severe, carried out aggrandizement of air pollution prevention and cure to be in charge of temporarily April accuse measure, a large number of enterprises by stop production. All enterprises must install desulphurization to take off saltpetre equipment. Go up in the price this month, appear the trend is covered below little scope, still basically be the account that duty chooses, do not contain duty value to do not have change basically.
From afore-mentioned magnesia the price can see, raw material of near future magnesia brick appeared phenomenon of fall after a rise, because of respect of price of this magnesia brick: Henan area value was not affected, and advocate the Liaoning area of producing area, occurrence downtrend of magnesia brick price.
Unlike price of magnesia brick, tall aluminous brick, the price of the high-grade and fireproof material such as carborundum brick and zirconium corundum brick all the time since it is stabler. This period these two kinds of prices are reduced besides duty dot outside, change without the price.
Raw material respect: The magnesia enterprise of Liaoning area is in quote troubled waters at present, the reason may be to it before have begin to rectify about company of Liaoning area magnesian products first relative. Relevant media may deliver a news 2018 by accident, and did not see well time, bring about partial enterprise to expect because of environmental protection magnesia price is climbed again litre. Partial media had deleted that news, and the file of sex of a few policy of concerned place.
Respect of finished product brick: With firebrick advocate for Henan yield a division, april, henan province was announced be able to bear or endure of lumber company relevant discharge a standard, wait for a reason because of local air pollution again, be able to bear or endure closely newly with what enter feudal area lumber company asks to go up entirely desulphurization takes off saltpetre equipment, a lot of enterprises are in at present stop production is rectified and reform and go up new facility phase, but a lot of enterprises are discharged to his whether can amount to mark, the problem such as the what kind of environmental protection equipment on need is not quite clear.
What is firebrick? Simple for, firebrick is combustion of a kind of ability and high temperature resistant brick body, its fireproof degree depend on 1700 ℃ controlling, use burden of classics of fireproof raw material normally, shape, roast and make. Firebrick can make the firebrick that makes different use according to using raw material, the firebrick that can make those who make different appearance according to using position. Today, what we understand from the following respects is firebrick.
One, firebrick is phyletic
Brick of argillaceous firebrick, tall aluminous firebrick, corundum firebrick, silica brick, magnesia brick, light qualitative adiabatic firebrick, Mo Laishi firebrick, carbon is waited a moment.
2, firebrick utility
Firebrick basically is used at making all sorts of industrial kiln oven, if build by laying bricks or stones builds kiln of forge of puddling furnace, steel-making furnace, coking plant furnace, glass, cement, steam boiler, all sorts of heat treatment furnace, heating furnace, with the liner of furnace of kiln of etc high temperature. The firebrick of different breed cannot be mixed with, when build by laying bricks or stones builds firebrick, the fireproof sludge that should use as same as firebrick variety does cementation to expect.
3, firebrick appearance
Firebrick treatment makes appearance have a variety of, but common firebrick appearance has a level brick, special shaped brick and distinctive model brick. Standard brick is being produced is according to occupation standard or country the relative standard such as the standard is produced. Special shaped brick, distinctive model the brick has blueprint above all when production, make a mould be in according to blueprint treatment is custom-built. The norms of standard brick has a lot of kinds, specific want a foundation kiln furnace demand is custom-built.
4, firebrick is characteristic
1, chemical composition composition: The character of the body of bases decision brick of firebrick and fireproof spend character.
2, bulk density: Bulk density is bigger, demonstrative firebrick is compact the gender is good, intensity is high, coefficient of thermal conductivity may be big; conversely compact sex is small, intensity is low, heat preservation effect is good.
3, apparent pore rate: Apparent pore of firebrick of general high density is led in 3%-10% , common and compact firebrick is in 20%-30% , light qualitative firebrick is in 45%-48% .
4, loading bate temperature: It is firebrick bears constant press negative charge and with warming up certainly of speed heat temperature of metabolic of the generation below the condition, it stated fireproof stuff is right high temperature and loading at the same time the counteractive ability of action. Like the Molaishi that Ruiwosheng produces temperature of bate of loading of firebrick RM-35 0.2mpa is in 1650 ℃ , and the brick uses this kind of Molaishi at sirocco conduit director and orifice place, the working environment of this place is controlled in 1200 ℃ , because this not comes,stone firebrick uses herein is more than sufficient.
5, heatproof shake function: Firebrick can bear extremely extremely hot cold temperature changes and be not destroyed, if argillaceous brick is usable the molten iron at molten iron canister is full-dress reach carry.
6, compressive strength: Firebrick falls in constant temperature (show normal temperature condition falls commonly) the ultimate load that can bear on unit area and is not destroyed.
7, ratio of the heavy change that burn a line: Firebrick is heating to set temperature and heat preservation times, refrigeration spends place to the remains of generation contracts or expand to body length of the brick after room temperature, + number expresses to expand, - number shows systole. Line change ratio is an aspect that demonstrates stability of bulk of firebrick high temperature, if systole is too big, can bring about firebrick to fall off etc.
The character of firebrick and content of composition of firebrick raw material have immediate concern, content of composition of firebrick raw material is different, character also has difference. Firebrick uses an environment to differ, the firebrick character of the requirement is different also.
5,
Firebrick norms
According to GB regulation, cent of general firebrick norms is brick of wedge of brick of brick of straight form brick, side thick wedge, perpendicular thick wedge, vertical section and arch foot brick 5 sort. According to standard of size of general firebrick shape, dimension of firebrick of straight body level is 230mm×114mm×65mm. This norms is a norms of straight form brick only. Because firebrick norms is more, do not explain one by one, specific can consult " size of general firebrick shape " GB.
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