The development trend of phosphatic firebrick is the brief in fireproof insulation material and the product research and development that did not burn handicraft is held in mud and those who become, must search certain the shirt-sleeve agent that has outstanding character, and expect this kind of shirt-sleeve agent not only have the character below Utopian normal temperature, and have taller tall character even, also want to avoid the harm to raw material of action principal part as far as possible, in that way, collosol of siliceous natrium, silicon is not Utopian also, and phosphate goes. Because this phosphate firebrick is obtained from now on,use the crucial raw material that waits for furnace of kiln of certain kind tall to go up in cement rotary kiln, perpendicular kiln, limekiln successfully.
1, of phosphatic firebrick make up
In grain grading, thick grain content has framework graph effect, ensure the tall of handicraft compressive strength, phosphatic firebrick, larger size and grain grading are effective, it is handicraft those who get packing sex is important. Add since fine pink fill clearance effect, make its begin cyst and conglutinate to thick grain content. As comparative as thick grain content, the accumulation density of fine pink is big, molecular structure is not orderly, have very big particularity, effect of mixture of facilitating be in harmony, use quantity is appropriate, endanger its compressive strength and wear-resisting property instantly. Consequently, to exceed the requirement basis of this kind of handicraft the most inseparable deposit fundamental, choose “ both sides big, the grain grading of the small ” intermediate, severe control critical cost particle size distribution, promote fine pink moderately, facilitating figuration and the wear-resisting property that promote handicraft and normal temperature issue compression experiment compressive strength.
2, of agent of phosphatic firebrick confluence make take
Phosphatic oneself does not have felt force, after it and lay a finger on of fireproof insulation material, change into aluminous phosphate, and subsequently the rise that spends increases continuously, ammonium sulphate base medium the biology macromolecule that ion drills with various means shape of catenary, beehive and interior space framework pursue tectonic, generation polymer and conglutinate effect make handicraft has compressive strength.
Phosphatic firebrick is commonly used and shirt-sleeve the agent is to use diluent of industrial phosphoric acid to formulary chroma to be worth, the phosphoric acid aluminous aqueous solution that production machines chloridize aluminium to configure and becomes, compare AL2O3 gram-molecularly: P2O=1: 32, namely ammonium sulphate and chloridize aluminous 7:1Aqueous solution is sure to blend melt 24 hour, scale exceeds 1.6~1.65 to be able to apply, use quantity is 8~10% .
3, phosphatic firebrick expects tiredly
The eye ground that expects tiredly is to make the iron in acid and pug mirrors eduction to come steam system, if tired material is not proper, the residual iron in acid and pug is mirrorred, the steam system that changes is not Chang Rong to build stratification easily to crack in controlling whole process. To avoid the generation of this kinds of state, below the premise condition that observes safe operating rules strictly, severe accuse to strand makings regulations system. Pug is sure to spend the tired makings site that 25 ℃ control in , good with plastic film lid treat 24 hour side rear but figuration; if spends a bit low pug to will freeze clean, central Africa of figuration whole process often allows Yi Zhanmo, cause a lot of appearances, compromise product quality.
4, phosphatic firebrick figuration
Key of the compressive strength below the normal temperature of handicraft comes from figuration, consequently, use the punch take shape that exceeds 300t without fail, grind did not put foot, is cubage sure to exceed 2.89g/cm relative to density? , in order to ensure finished products exceeds 2.70g/cm? . Severe accuse a layer to crack with touch film, semi-manufactured goods is machined be sure to airing side is rear but kiln moves qualitative processing.
5, phosphatic firebrick moves qualitative processing
Phosphatic firebrick, the phosphoric acid that because aluminous aqueous solution of shirt-sleeve agent phosphoric acid is report,changes 2 hydrogen are aluminous, all normal gel sexes are had in normal temperature condition, whole process is changed in strong base in, should add lukewarm to must after is spent, aluminium of acerbity type phosphoric acid is anxious phosphoric acid changeably aluminium and slant phosphoric acid is aluminous, generation takes off dry aggregate reaction, the conglutinate effect with an extremely powerful generation of the generation because of this kind of new chemical material and polymer, congregate body gains compressive strength. Another, subsequently the promotion that spends, slant phosphoric acid aluminium divides generation outside aggregate action, also can produce deliquescent effect, and achievement AiPO4 and P2O5, some AL2O3 are put to also can produce report to produce AiPO4 in this kind of P2O5 and fireproof insulation material, because of the generation of AiPO4, also win promotion of congregate body relative to density.
The characteristic and characteristic key of phosphatic firebrick is compressive strength tall, anti-corrosive working capability is strong, hole rate is low, hear resistance is good, norms of the finished products after tone is handled character does not have furl and appreciably splash goes up, lukewarm compressive strength is high in coming below normal temperature, in 1200~1300 ℃ following good have good wear-resisting performance at fire brick, deep gray is shown after tone is handled character or ash is ivory.
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