Pouring expecting is to basically be used at the whole such as liner of all sorts of industrial kiln furnace to build thing. Certain and high grade breed also can be used at smelting furnace. If mud of aluminous acerbity brine is fireproof and pouring,expect can use extensively at all sorts of heating furnace to mix other be versed in without the broken bits, heat that erodes without soda acid in equipment, and fireproof and pouring the main breed that expecting is adventitious fireproof material, what expect according to what using cementation is different, manage can distribute its conserve forming machine the rigid that it is water, gas rigid and igneous rigid 3 kinds.
1, water rigid is fireproof and pouring makings: What expect for cementation with cement is pouring expect in sclerotic process need has water to share chemical reaction, form gel sclerosis intensity, it is water rigid fireproof and pouring makings. Cement is a decision pouring makings intensity (especially normal temperature intensity) main factor, but its fireproof degree relatively inferior, be in so after assuring necessary normal temperature intensity, answer to reduce cement dosage as far as possible. If need for the workability of close-grained sex and construction, can increase fireproof pink makings appropriately. Reducing cement dosage also is one of measure that reduce cost. Mud of aluminous acerbity brine and silicate cement, lime should prevent strictly to wait in construction mix with. Because these two kinds differ,the meeting after the material of chemical composition mixes produces hydrous aluminium acid 3 calcium, make intensity is reduced greatly.
2, gas rigid is fireproof and pouring makings: It is the CO2 in pointing to its cementing agent to absorb air in conserve and gradually caky sclerosis. Fireproof and pouring commonly used is water glass in makings fireproof concrete. Water glass is fireproof and pouring makings besides have high temperature resistant property besides, it still has the property of acid-proof, wear-resisting, because this is commonly used,make the liner of chemical equipment. , water glass is fireproof and pouring the process with sclerotic below natural condition makings is very slow, need to join hurried to coagulate when construction agent (natrium of fluorine silicon acid, tall aluminous cement) .
3, igneous rigid is fireproof and pouring makings: What make cementation material with phosphoric acid and phosphate is pouring makings, need course heats roast hind ability obtains intensity and high temperature capability, friend says igneous rigid is fireproof and pouring makings.
1, if mud of aluminous acerbity brine is fireproof and pouring,expect can use extensively at all sorts of heating furnace to mix other be versed in without the broken bits, heat that erodes without soda acid in equipment. In suffer molten iron, molten steel and slaggy erode and working temperature higher position, wait like channel of tapping chamfer, bucket flourishing steel and blast furnace shaft, taphole, can use what be united in wedlock by low calcium and pure tall aluminous cement by what contain the actor plasmid record with alumina is taller and good agglomeration and farinaceous makings to be made fireproof and pouring makings.
2, phosphate is fireproof and pouring makings can use extensively at heating furnace to mix already heat in soaking furnace of the metal, also can use at coking plant furnace, the place that stock contacts is the same as directly in cement kiln. Be in with slaggy a few place in the metallurgy furnace that contacts directly with melt metal and other container, use high grade phosphate fireproof and pouring makings undertake repairing also having favorable effect. In temperature of a few jobs the position with need very not tall and higher wearability, use phosphate is fireproof and pouring makings is more appropriate. If choose corundum to pledge fireproof stock is made fireproof and pouring makings, the effect with all have better commonly is used below reducing atmosphere.
3, fireproof and pouring expect when undertaking conserve, usable wet gunny-bag or wet matting lid are in fireproof and pouring the surface of makings is seasonable aspersion in order to hold wet position, the position that covers to inconvenience (if establish wall, top wall) usable atomizer is in pouring oxygen of water of makings surface gush is protected, conserve time not less than 2d, and water of Tian Yingqin wine. Conserve system and fireproof and pouring the bond sort of makings is concerned. In production if shorten conserve time, or far from conserve, often cause next roast give an issue.
4, when the liner that regards hot project as equipment and body of heater, should be in commonly use advancement travel is roast, in order to make among them physics water and crystallization water eliminate stage by stage, achieve somehow agglomeration, make its bulk and certain property reach the steady state when using, roast system has very big effect to service life.
5, adopt tall purity, send the raw material of density high, can the content of alkali metal of bring down dissolubility, for example fireproof and aluminous aggregate chooses rotary kiln to calcine as far as possible, foreign matter density of little, bulk is high, or use compact corundum to be aggregate, and strict on matter content to passing the raw material of to calcine control, control less as far as possible at the same time add a capacity.
6, when choosing additive, what we use commonly is lignin calcic salt and sodium salt, make thereby pouring the alkali metal of makings increases, quickened to hydrate to decompose, choosing additive when us so when, the part that must use additive reasonably reachs content.
7, good water dosage must be controlled when construction, avoid water cloudy or foreign matter is more.
8, when construction, can enter base substrate microtherm kiln to undertake first dry later in drawing of patterns, it is base substrate in 36h. Beautiful conserve period inside oxidation, make its intensity is achieved thereby. Tall.
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