Melting point of silica brick of silica brick characteristic is higher, good performance getting power is had between 1640-1680 ℃ , its melting point is mixed in 1670 ℃ about Fang Shiying melting point (1713 ℃ ) between. 300 ℃ reach prep above approach melting point (scale quartz or Fang Shiying) silica brick volume is steady, the bulk when 1450 ℃ heating when using expands make an appointment with 1.5%-2.2% , be helpful for assuring the structural intensity of body of build by laying bricks or stones and air-tightness. The one big drawback of silicon tile is difference of heatproof shake sex (normally water-cooling circulation time is 1-4 second) , it is fireproof sex next inferior () of general 1690-1730 ℃ , its application range is very narrow.
Silicon tile sort is more, by utility cent is: Kiln of Jiao Lu, hot-blast stove, electric stove, glass uses silica brick to wait. By its complexity degree cent is: Mark brick, common brick, different brick, special model the brick. Must not contact alkaline broken bits. Because Jiao Lu is large,change (carbonization room rises by 4 meters to 7 meters of) , also had to the requirement of the quality of use fireproof data and over all dimension rise further. Future, on the manufacturing technology of silica brick, should to the middle of raising silica brick SiO2 content, drop foreign matter, reduce the content of Al2 especially; In performance side, should increase strength of product density, compression, reduce porosity to serve as direction. In the manufacturing technology of silica brick, should use a variety of burden and multistage burden, brought harm expands in order to alleviate because of the bulk in fire process in fire process, ensure its are reasonable accumulation density, increase its bulk density further. To make silica brick has higher compressive strength, besides needing special appearance, production piece to count little brick, answer to use machinery to shape as far as possible.
If can use single raw material to satisfy the amount of silica brick and quality requirement,the raw material of silica brick is chosen, it is optimal choice, but this often is accomplished very hard, produce burden to the silica brick of much breed, much raw material, still need to do much research work. Findings shows as follows. ① makes a variety of raw material burden that change property to differ brick, can alleviate base substrate is firing of each phase expand, reduce crackle percent defective. ② is in identical and firing make below, with what change quickly high pure quartz is made base makings, true density is reduced, of scale shape quartz change degree to rise, increased the laden bate temperature of goods and strength of normal temperature compression. ③ mixes burden to make a brick with a variety of quartz that change function to differ, can use a part to change rate fast, but firing and serious loose quartz (the quartz that must dominate this kind of type strictly) . If other condition is eligible, silica brick of extremely middling speed, slow, slow changeover can be made high quality silica brick. The silica goods that changes quickly is easy produce crackle, because change rate fast, cannot use alone commonly. When heating only, ability is changed quickly and do not loosen silicon. The function of silicon raw material affects the quality of the product directly not only, and the decision wears those who make bricky technology to make.
Why does Jiao Lu use silica brick in great quantities? Why does Jiao Lu use silica brick in great quantities? Because working environment of Jiao Lu and production are characteristic, the firebrick that suits quite is not silica brick to not be belonged to, silica brick is stable below 700~1450 ℃ , structure the high grade firebrick with high intensity of compact, heat conduction, high temperature. Between ℃ of 950~1050 of coking plant temperature. To ensure cooking quality, the exterior temperature of room of char of anxious furnace partition should heat to 1100~1250 ℃ . After coke coal, can fall to be controlled to 700 ℃ . The bosseyed and fluctuant limits of burner is 1200~1450 ℃ , the adjoining meeting of bosseyed char room happens push anxious wear away. Because coal-bed is dry distillation, the knot is so anxious it is to be in close undertake below airy condition, requirement partition air-tightness is good, below high temperature airtight, do not produce systole to be out of shape, firebrick appearance is neat, size is exact, build by laying bricks or stones builds a brick to seam small, do not send cause build by laying bricks or stones to seam craze.
What does the fireproof data that coking plant uses have? Coking plant has with fireproof place: Char room, firebox, roof, chute, regenerator, flue. Coking plant has brick of silica brick, half silica brick, clay, tall aluminous brick, thermal insulation with fireproof material fireproof material, fireproof fiber, fireproof mud. Why does Jiao Lu use silica brick in great quantities? Coking plant uses silica brick is the brilliant photograph that gives priority to with scale quartz, the silicon that uses build by laying bricks or stones to build Jiao Lu is fireproof goods. Modern Jiao Lu is the large heat that build by laying bricks or stones of the brick that controls with on 10 thousand tons fireproof material builds labor facilities, among them silica brick occupies 60%-70% . The place such as room of the regenerator that applies to build by laying bricks or stones to build Jiao Lu, chute, firebox, char, roof is used.
Coking plant silica brick should have the following characteristic: (Temperature of 1) burden bate is higher. Coking plant silica brick should bear of roof high temperature dynamic load, at the same time the requirement uses changeless form for long, ask temperature of bate of accentuation of anxious furnace silica brick is high so. (Performance of 2) heat conduction is good. In char indoor through burning indoor kiln wall heats coke coking plant, so build by laying bricks or stones builds the silica brick of firebox wall to should have taller thermal conductivity. It is good that 3) fights thermal shock function. Because Jiao Lu wants to install coal regularly, piece anxious, cause temperature of silica brick of furnace chamber two sides acuteness change, so silica brick of requirement anxious furnace fights thermal shock function good. (4) high temperature volume is steady. The name that coking plant uses silica brick is JG- bait, the product uses YB/f5013-1.
Come with fireproof mud build by laying bricks or stones is anxious the fireproof sludge that is used at build by laying bricks or stones build type Jiao Lu, ask its have good normal temperature plasticity and felt property, with benefit at construction, dry hind systole is small, prevent crack; Agglomeration or solidify can undertake below use temperature, have particular strength, ensure shaft is firm, close, ingle is fought burn, to load temperature wants prep above to use temperature. Coking plant has silicon fireclay and argillaceous cover or daub with plaster with fireproof mud. Silicon fireclay is used when brick build by laying bricks or stones is built, build by laying bricks or stones uses argillaceous fireclay when argil brick. Silicon fireclay is to use silica, useless silica brick and clay to be made. Silicon is bases, the content of silica is higher, its fireproof sex is stronger. Mix into joins silica brick white is to improve the performance of high temperature felt of silicon mortar and silica brick, because of its and silica brick expansile can agree basically, can make the brick is seamed stick surface relying on a brick. The content of powder of deserted silica brick in silicon fireclay. Combine argillaceous affiliation, can increase the plasticity of fireclay, decrease osmotic and dehydrate, increase commonly or decrease. Can divide by content for high temperature, medium fireclay of silicon of lukewarm, low temperature.
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