The characteristic that daub expects and construction note

Daub makings is with handiwork or mechanical daub a kind of at liner of furnace of high temperature industry fireproof material.

 

Daub makings has certain plasticity, have the aggressivity that fights fuse-element or gas, have good daub sex and adherent sex, especially in use not craze, do not flake, not with be linked together the chemical reaction characteristic since material.

 

Fireproof daub expects cent is:

 

(1) corundum pledges daub expects: Make raw material with corundum namely, its Al2O3 content is more than 90 ％ commonly.

 

(2) Mo Laishi pledges daub expects, tall aluminium pledges daub expects, clay pledges daub expects.

 

(3) ) silicon pledges daub expects: Make raw material with silica, its SiO2 content is in 90 ％ above.

   

(4) magnesium pledges daub expects: Use agglomeration or electric frit magnesia to make raw material, its MgO content is more than 80 ％ normally. If make the aggregate, daub material that makes up for matrix with magnesia pink and chromic mine pink with magnesia, pledge for magnesian chromium daub expects, be like the daub material that matrix constitutes by magnesia pink and aluminous pink, pledge for magnalium daub expects.

 

(5) with aluminous grog, or Molaishi, or corundum is aggregate, in matrix (or little grain part) the daub makings that joins pink of stone of right amount zirconium to make up, call aluminous zirconium to pledge daub expects.

 

(6) still has makings of qualitative daub of carborundum daub makings, pointed spar to wait. Uses bond has: Mud of aluminous acerbity brine, phosphate, get together phosphate, slant the material such as phosphate, vitriolic magnesium, magnesium chloride, vitriolic natrium, siliceous natrium. To acquire good construction property, join normally right amount but model clay.

 

Fireproof daub makings is in furnace of high temperature industry daub construction, can be like system of the line that make, make covering layer, make sealed coating.

 

Makings of acid-proof and fireproof daub is by acidity or makings of half acidity and fireproof pink (be less than 0.088 Mm) , bond becomes with coating auxiliary modulation, adoptable acidity and half acid material have stone of pyrophyllite, silica, casting, andesite, Jiao Baoshi to wait, their be able to bear or endure acidity is pyrophyllite respectively 92% ～ 96% , silica is more than 97% , casting stone 98% , andesite is more than 94% , jiao Baoshi 92% ～ 97% . In addition, to prevent the coating after coating construction is dry medium happening craze, also can join Pyrex short staple, or siliceous aluminous qualitative fireproof short staple (3 ～ 7 Mm) .

 

The bond that acid-proof and fireproof daub expects has water glass, collosol of 2 oxidation silicon, acidity phosphoric acid is aluminous (phosphoric acid 2 hydrogen are aluminous) wait, the water glass that when kiln furnace makes bond with water glass, Kairuide can choose tall modulus (modulus is not less than 3) , and but fetching and organic colophony will raise its felt force and fight chap function, organic colophony had better be water-solubility or water emulsion colophony, the organic colophony that can choose has water-solubility methylic silicon mellow natrium, get together latex of acetic acid ethylene, latex of polypropylene acerbity ester, colophony of urea of ability in swimming, si02 content should be chosen when making bond with collosol of 2 oxidation silicon 30% ～ the silicon collosol of 45% , coupling agent of person silicon alkyl or organic colophony latex can be added when using. Classics high temperature requires when making bond with aluminium of acidity phosphoric acid roast ability solidify, heating to condensation phosphate is formed in the process and become film. Also can join solidify agent to make its solidify becomes film, adoptable solidify agent has prussiate of metallic oxide, hydrate, borate, silicon to wait.

 

The exterior coating of some of the smokestack that makings of acid-proof and fireproof daub basically uses at making to acidity gas medium is passed, flue and some liner that has acidity medium reactor.

The construction that daub expects is quite convenient also, but must clear the tool reference plane that is protected clean, maintain appropriate temperature. Certain place brushs a specific slop on preexistence tool reference plane even, expect the daub that has made up to by order even ground daub is on tool reference plane next.

 

Before the construction before daub makings is used must natural airing is certain time, press next warm up the curve is roast to constant temperature ability investment is used.

 

Anyhow, all sorts of daub expect phase of as fireproof as other adventitious form data is compared, main difference deserves to compare in grain, minim additive and the quantity that add water.