To large surplus normal, of vitreous kiln furnace form normally by L condole wall (use silica brick normally) , fused ministry (the area that contacts directly with vitreous fluid should use electric frit brick, the use silica brick that relies on coping or electric frit brick) , card neck (use silica brick normally) , cooling ministry includes ear pool (the place that contacts directly with vitreous fluid uses corundum qualitative data normally, the place that does not contact directly with vitreous fluid uses silica brick or corundum) , annealing kiln, regenerator (by chromic brick of magnesium of tall aluminous brick, clay brick, direct union) wait for a part to form.
1, Xuan supports
The Xuan of fused ministry and cooling ministry carries vitreous frit kiln on the head (include arch part) , these place are in the working temperature of 1600 ℃ to fall, use the fireproof material in these place to want to be able to bear already high temperature, loading and want what alkaline vapour reachs batch to bear erode action, accordingly, use as the fireproof material of coping must be had tall fireproof degree, high loading bate temperature and be able to bear or endure goodly creep sex, and coefficient of thermal conductivity is small, the fireproof material below high temperature cannot pollute vitreous fluid, the unit weight with qualitative material also wants lesser, high temperature strength is good wait for a characteristic.
And high-powered high pure the characteristic that silica brick as it happens has above: Temperature of A, loading is high be close to its fireproof degree; The stability below B, high temperature is good, compression intensity is high; C, as a result of bases SiO2, content > 96% , the main element part that forms with glass is same, so the eater below high temperature condition won't pollute vitreous fluid basically; D, low-cost.
Support in all sorts of glass bridges accordingly, high pure silica brick becomes all sorts of glass to produce the good product in the process that make.
The high temperature chemistry that cooperates flotsam and alkaline vapour and fireproof material reacts the chemistry of a generation is eroded, and the any crystalline substance that because substance appearance is migratory,produces with temperature place change and the structure is compact sexual change is the main reason that causes Xuan to carry a brick on the head to mar.
Study the result makes clear: Silica brick of kiln of glass of Xuan be of use, the corrode below action of kiln furnace high temperature changes the process basically is foreign matter migratory change with miscellaneous photograph what cause, chemistry is eroded and fusible effect is main negligible. The action that change and purifies oneself, make kiln furnace is run belt change property gradually, its high temperature capability gets rising.
2, Chi Bi 1) the place that contacts with vitreous fluid
The part that fused ministry and wall of cooling ministry pool and vitreous fluid contact directly, get high temperature, the chemistry that vitreous fluid causes erodes the mechanical physics that causes with flow to erode, this place is main to fireproof material the condition is to have fight vitreous fluid goodly to erode performance, cannot pollute vitreous fluid at the same time.
Outside furnace of domestic glass kiln use brick of corundum of electric frit zirconium and α generally - build by laying bricks or stones of β corundum brick, β corundum brick is built. The high temperature of brick of corundum of electric frit zirconium and the performance that fight vitreous fluid are superior, this is it obtained what fireproof material obtains agglomeration impossibly to fight the inclined zirconium stone with first-rate aggressivity and α - of Al2O3 in all crystal, so it fuses as vitreous kiln furnace ministry pool nogging is very appropriate.
α - the main brilliant photograph of β corundum brick and β corundum brick is corundum, vitreous appearance content is 1%-2% only, have fight aggressivity goodly can, compare with the function photograph of brick of corundum of electric frit zirconium, because do not contain ZrO2 crystal, viscosity of its reaction layer is small, not quite stable below high temperature, so between bricky surface and vitreous fluid diffuse rate is older, line of kiln furnace kiln is marred faster. But the use temperature in kiln furnace under 1350 ℃ when, of brick of A- β corundum, β corundum brick it is good to fight aggressivity to be able to want to compare brick of corundum of electric frit zirconium. Accordingly brick of A- β corundum, β corundum brick is in temperature under 1350 ℃ when, it is the fireproof stuff with the better place such as cooling ministry.
2) the place that does not contact directly with vitreous fluid
The part that fused ministry and wall of cooling ministry pool do not contact directly with vitreous fluid (also call parapet) , this area basically suffers what alkaline vapour reachs batch to erode action, what the basis designs is different, some use corundum pledge material pledges, some uses silica brick, these 2 kinds of material can satisfy a requirement. Accordingly brick of link up with, straight model the brick often is used in this place.
3, regenerator
1) regenerator Xuan and side wall
Of regenerator Xuan and side wall inside the surface is eroded by high temperature, dust, alkaline steam, from go up and fall, erode degree wear off, of fireproof material choose a ground coping of regenerator of vitreous kiln furnace, on side wall, medium, issue paragraph of place susceptive temperature to reach erode degree to differ will decide. Coping and side wall choose silica brick commonly, middle side wall suggests to choose brick of low stomatic clay and tall aluminous brick commonly; Kiln furnace bottom chooses general clay brick and brick of low stomatic clay commonly. Differ according to the design, in recent years, in side wall, upside uses chromic brick of common magnesium chromic brick and direct union magnesium commonly, the alkalescent brick such as magnalium brick also achieved better use result.
2) checker
Checker is in high temperature loading because of total brick body, below dust and alkaline steam action, get erode degree the meeting is more serious than and side wall, use condition is more accordingly slashing. Of checker jam with collapse often be one of main reasons that cause vitreous kiln to stop furnace cold repair. Requirement checker is so fireproof material physics intensity is high, creep rate is low, the change of amiable to kiln furnace temperature atmosphere is alkaline erode have stronger defence capacity, not adhere dust, attaint rate is slow.
In the coping of checker: Located temperature is high, can achieve 1400-1540 ℃ , be eroded by alkaline vapour and dust also be serious, general meeting chooses magnesia brick of electric frit recombine. Because magnesia brick of electric frit recombine is medium silicate photograph is less, crystal of square magnesian stone is already grown, direct union has been formed between square magnesian Shi Zhi, defer reach crystal of stone of check Fang Mei to be below alkaline steam action gradually old rate, make the brick produces chap, pulverization not easily.
Checker upside: The place temperature can amount to 1100-1430 ℃ , magnesia brick of recombine of general use 95# went.
Checker is mid: Located temperature is 800-1100 ℃ , inside 800-1100 Celsius limits alkali metal sulfate condenses, magnesian, calcic qualitative checker gets of SO3 and Na2O be eroded badly and produce chemical reaction, can bring about larger bricky put oneself in another's position to expand, damage is serious, so this place does not suit to use magnesia brick, and should choose brick of magnalium pointed spar to perhaps combine magnesian chromic brick directly brick of magnesian perhaps zirconium and magnesian olivine brick.
Checker bottom: Temperature of this paragraph of exercise is low, loading is big, suffer alkaline erode small, but closer from flue, suffer the effect of cold air directly, the material of need should bear character be able to bear or endure urgent cold urgent heat, choose the price cheap went. Because this uses the brick of low stomatic clay with lower price commonly.
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