As a result of,silica brick expands is of silica brick expansile. The thermal conductivity of silica brick lift and increase of temperature as the job, contractive without remains, in drying-out process, silica brick bulk lift and increase as temperature. In drying-out process, silica brick expands greatly happen between 100~300 ℃ , before 300 ℃ expand the quantity measures 70%~75% to always expand about. Its reason is SiO2 appears in drying-out process 117 ℃ , 163 ℃ , 180~270 ℃ with 573 ℃ 4 brilliant form changes a spot, among them between 180~270 ℃ , the volume that causes by Fang Shiying expands big.
The key that decides stand or fall of silica brick thermal stability is true density, the size of true density is one of important signs that decide its quartz is changed. The true density of silica brick is smaller, its lime is changed more complete, the remains that arises in drying-out process expands smaller also.
Silica brick is 2 oxidation silicon (SiO2) content not the fireproof data products under 93 ％ . Silica brick is had fight acidity goodly to erode ability, its heat conduction performance is good, loading bate temperature is high, be in commonly 1620 ℃ above, only fire spends Bijinai low 70~80 ℃ .
The material of silica brick is it is raw material with quartzite, join a few mineralizer. Firing below high temperature, its are mineral those who comprise composition to be scale quartz, Fang Shiying and high temperature to form is glassy wait for answer photograph to organize, its AiO2 content is in 93% above. Firing in better silica brick, the content of scale quartz is high, occupy 50%~80% ; Fang Shiying take second place, occupy 10%~30% only; And the content wave motion of quartz and vitreous photograph is in 5%~15% .
Silica brick belongs to acidity and fireproof material, erode resistance to acidity slag stronger, but when be eroded strongly by basic slag, easy wait for oxide action and be destroyed by AI2O3, have good repellency to the oxide such as CaO, FeO, Fe2O3.
When working temperature under 600~700 ℃ when, the bulk change of silica brick is bigger, the performance that fights urgent cold urgent heat is poorer, thermal stability is bad also. If Jiao Lu is long-term below this kind of temperature,work, body of build by laying bricks or stones is very light burst damaged.
The silica brick that Zhengzhou flourish Cheng Naicai produces basically is used at build by laying bricks or stones to build the partition of char room of Jiao Lu and firebox, the kiln top of vitreous pool kiln, Chi Qiang, of silicate goods firing kiln. Contemporary and large Jiao Lu, to improve productivity, need decreases the boiler setting of room of char of thin anxious furnace and firebox, consequently the requirement is used tall silica brick of compact tall thermal conductivity.
Zhengzhou flourish Cheng Naicai is located in Henan new close city, it is a special production manages pair of export carry out to be able to bear or endure the company of material product, the company is held to it is core with user demand, hold to " stand fast with responsibility character, serve a client with sincere letter " management concept, in be able to bear or endure to the accord that lumber industry won a client is approbated and be evaluated highly. If concern,be able to bear or endure you have material side doubt, call please contact with us.
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