Oxidation calcic firebrick prevents to hydrate to improve technology

The CaO in fastening firebrick about MgO-CaO easily to hydrate problem, obtained certain result through concerning antirust to apply.
(After classics of 1) dolomite brick is firing, compact agglomeration surface layer can prevent to hydrate action, this is the dolomite brick that is united in wedlock than bitumen or colophony more the cause that fights to hydrate. (2) tar macerate is firing dolomite brick is had fight to hydrate action goodly, perhaps use olefin dip to;burst;ulcerate;fester can achieve have fight to hydrate action equally, (3) goods uses vacuumize, aluminum foil to pack carry to be defeated.
Use " anhydrous resin
To MgO-CaO the department contains carbolic firebrick for, regard MgO-CaO-C brick as the inelasticity of bond to overcome phenolic aldehyde colophony, prevent to contain the to hydrate question of CaO goods, developed anhydrous colophony bond thereby. Its purpose is to be on the plinth that retains character of phenolic aldehyde colophony, introduce scanty water group to undertake special denaturation is handled. To raise hydrophoby of phenolic aldehyde resinous, with Shu Shuishu fat replaces a share one OH base, imprint with decreasing to arrive from room temperature the water content of the generation in the pyrolysis process of 600 ℃ .
Anhydrous colophony has the following kinds: (1) is thermoplastic anhydrous colophony: Namely phenol kind does with Shu Shuishu fat join a quantity to be worth by hydroxyl 250? 400 deserve to compare, mix with oxalic acid make activator to toluene sulphur acid, in 97? 103 ℃ : Reaction 2? 3h, rejoin oxalic acid and aldehyde kind, join a quantity to press phenol kind with aldehyde kind Maerbi is 1. 05? 0. 95, in 97? Do 103 ℃ react 2? 3h, next at dehydrate of reduce pressure of 105 ℃ vacuum, complementary makings is added to get namely after thermoplastic anhydrous colophony bond. (2) heats up colophony of solid sex anhydrous: If use ammonia water to make activator, phenol kind with aldehyde kind Maerbi instead 1.1~1. 5, temperature of dehydrate of vacuum reduce pressure is 90 ℃ , make so that heat up bond of colophony of solid sex anhydrous namely. The name of a river in Shaanxi and Henan provinces is able to bear or endure the bond of LW901 anhydrous colophony that the courtyard develops has the following characteristic: 1) dissociate moisture content is low: Normally moisture of colophony of phenolic aldehyde series is 5% the left and right sides, some is as high as 13% , moisture of LW 901 colophony is less than 0.4% , it is normally 0. 2% the left and right sides. 2) condensation moisture content is low: Is control of cost of hydroxyl of AW 901 colophony in 300? 400, is the condensation water that produces in heat treatment process less than phenolic aldehyde colophony 30% ? 50% , 3) used high boiling point to be not water system dissolvent, overcoming alcohol is the hydrophily of solvent, added bond again arenaceous to black lead, magnesian calcium wellability. Carbolic brick uses the magnesian dolomite that uses production of LW901 anhydrous colophony at steel 30t answer blows converter, do not achieve 1420 furnace and the good result of 1329 furnace with score of photograph of brick of MgO-C of the corresponding period.