Fireproof material has the application of different measurement in each large trade domain actually! Compare common application to be in namely however the following 5 domains.
(One) steel-making system
Steel-making system includes bag of the finery outside converter, electric stove, furnace, steel and the facility such as intermediate bag.
In electric stove, makings of dry type vibration, prefab or the place such as cast-in-place furnace lid or area of furnace lid triangle, all achieve better use result;
In converter and electric stove, fireproof spray paint is used to undertake repairing commonly when marring, its method has handiwork to cast fill, wet, dry type or flame spraying and splash broken bits to protect furnace to wait.
In converter, use generally splash broken bits to protect furnace technology, furnace life can achieve above 10 thousand times;
Sort of the finery outside furnace is more, RH law and DH law take off the insertion of gas unit to provide line system, pledge with tall aluminium commonly fireproof and pouring makings irrigate whole, service life is 20~80 second.
Steel is wrapped and intermediate bag is the important and accessory equipment of steel-making furnace, also be to use up fireproof material to compare much hot project equipment. In the past, steel bag uses argillaceous firebrick, tall aluminous firebrick, half silica brick and candle stone brick to wait commonly firing bricky build by laying bricks or stones is built, service life is 10~70 second. When using steel to wrap blowing or successive ingot casting, because tapping temperature grows high with retention period,wait for a reason, cause Bao Ling to drop quickly. So, each country pledges to hiring line capable person development takes seriously very, also obtained striking progress.
Some steelworks converter uses 200t steel bag, with aluminium magnesium pouring makings and makings of do as one pleases build line, bao Ling is mixed 80 times or so for 95 respectively;
Some steelworks converter uses 300t steel bag, with tall aluminium magnesium pouring makings build line, the Bao Ling after the course is repaired is in 260 times or so commonly, fireproof bill of material bad news 1.78kg is the following;
Many countrywide steelworks are not more than the steel of 100t to wrap, with new technology aluminium magnesium fireproof and pouring makings, its Bao Ling is the left and right sides 90 times, every tons of steel is the cost that irrigate steel 5.50~7.50 yuan.
Line of intermediate bag bag uses heat insulation board or magnesium pledges the kind of coating, lasher that block broken bits uses Molaishi qualitative, aluminium magnesium pledges and magnesium pledges fireproof and pouring makings make, the technology that can satisfy successive cast steel asks.
The fine outside furnace uses integral spray gun, with Yu Gang the bag blows broken bits or steel wraps dusting to wait. Place of above of line of its broken bits pledges with tall aluminium fireproof and pouring makings, broken bits line pledges with low cement corundum to nozzle place fireproof and pouring makings, vibration shapes to lap for whole line.
(2) puddling system
Puddling system includes agglomeration, coking plant and blast furnace to reach its accessory equipment. Furnace of light a fire of belt agglomeration engine is used fireproof but plastic be united in wedlock with clay fireproof and pouring makings spot is made, or with phosphoric acid fireproof and pouring makings is prefab a hoisting, its service life is 3~6 year.
Should use line formula when portfire, below roof pressing more, requirement of work of the chamber of a stove or furnace ameliorates, usable light qualitative excel in is fireproof and pouring makings or fireproof fiber and its goods make line, also achieve better result;
The place such as facing of thermal insulation of anxious furnace roof, Fu and furnace door is used fireproof and pouring makings irrigate, when furnace head damages, use spray paint to repair. Additional, dry extinguish anxious equipment also is used pledge again or pledge gently fireproof and pouring makings;
Blast furnace is the puddling equipment of serial production. Small-sized blast furnace ever used tall aluminium of mud of aluminous acerbity brine and phosphoric acid to pledge fireproof and pouring makings is prefab build by laying bricks or stones builds a hoisting,
Wall of water-cooling of large blast furnace uses carborundum pouring makings pound make, hearth mat layer and all round the brick is seamed use fireproof and pouring makings and nitrogen change silicon qualitative filling, when lining is marred, use fireproof press makings and fireproof spray paint to repair, so that prolong service life, make furnace life is achieved 10 years even 15 years.
Blast furnace taphole is used commonly medicinal powder the Al2O3-SiC-C of shape prepares Chinese medicine by roasting it in a pan mud jams character, can make sure iron mouth taphole is stable, the operation is normal.
Channel of blast furnace taphole is used formerly fireproof pound dozen of makings make, channel expects ton of iron is odd bad news is 1.1kg about. Use low stomatic and compact qualitative fireproof data now pouring, connect iron quantity to achieve left and right sides of 100 thousand T, generation channel age accumulative total connects iron to measure about 900 thousand T, be able to bear or endure material ton iron only waste time is less than 0.38kg. In the meantime, do as one pleases is fireproof and pouring expect and avoid roast and fireproof pouring makings, the crucial and accessary facility that also got on hook of blast furnace taphole hot-blast stove is puddling blast furnace applied.
Liner of hot-blast stove of medium, small-sized blast furnace, useful and fireproof pouring makings is prefab piece build by laying bricks or stones builds. Hot-blast stove burner is usable and fireproof pouring makings is prefab piece build by laying bricks or stones is built or the spot irrigates, its ball top is used pouring makings irrigate working line. The layer bulk density that shaft of large hot-blast stove relies on furnace casing is the paint of small qualitative spray of 1.3g/cm3 about, the ball carries a gush on the head paint of an acid-proof spray, form integral liner, use corundum to pledge fireproof and pouring the material such as makings, the spot irrigates, achieved better use result; Canister of torpedo type molten iron and general and local or the furnace that mix iron is all use fireproof and pouring makings, makings of usable also and fireproof spray is repaired, use effect is better.
(3) building materials system
Building materials system includes the industrial section such as cement, glass and pottery and porcelain.
Cement kiln liner pledges with phosphoric acid tall aluminium or magnesium pledges and magnesian chromium does not bake bricks character, service life 6~18 month, local also use indeterminate form fireproof material.
Rotary kiln of some large cement plant, fireproof and pouring expect use quantity is 19%~35% , its are main breed is low cement fireproof and pouring mud of makings, aluminous acerbity brine is fireproof and pouring makings, carborundum is qualitative fireproof and pouring makings and heat insolation are pouring makings;
In vitreous industry, the stannic chamfer on product line of float law glass, it is to use fireproof and pouring expect make. Additional, when vitreous pool kiln is marred, repair character with silicon makings undertake solder. When building pool kiln heat preservation, pledge with silicon commonly adiabatic and pouring makings; Ceramics industry uses pit, pledge with carborundum sometimes fireproof and pouring expect and pledge gently fireproof and pouring makings.
(4) steel rolling system
Furnace of industry of steel rolling system is phyletic much, amount is large, use temperature is commonly under 1400 ℃ , all be blaze furnace.
Furnace of this system kiln all can use indeterminate form fireproof material makes liner, obtain favorable economic result.
Steel rolling heating furnace is used fireproof but plastic make liner, service life is very long. Be united in wedlock with clay fireproof and pouring makings whole irrigates lining, service life is 4~10 commonly year.
To heating furnace of type of accumulation of heat, should choose small expand fireproof and pouring expect lining, show to already was used more than 2 years, in good condition nondestructive. Forged steel heating furnace is intermittent operation, temperature to change commonly mix greatly vibration waits, with line of bricky build by laying bricks or stones, use 2~5 month, with stick on union is fireproof and pouring of makings can use 2 years of above
Well-known, the ℃ of use temperature <1400 of steel rolling heating furnace is operated by fits, domestic and international production carries out a proof, its lining material should choose Al203 ≤ 65% , intensity is pressed to be mixed for 20~25Mpa respectively after stoving is burned with 1400 ℃ do not be less than 60Mpa, can achieve macrobian goal. Because, aluminous content is mixed high strength is great fireproof and pouring makings, its fight thermal shock sex to differ, when using easy flake and craze, affect its life.
(5) other industry system
In petrifaction industry, those who be in charge of type heating furnace to be 0.5~1.0g/cm3 with bulk density is light qualitative fireproof and pouring makings, wait for methodological construction with manual daub or spray, service life is controlled 5 years.
Use paint of fireproof material spray to build line, also achieved better use result. Especially wear-resisting is fireproof and pouring makings got applied in platinic reforming device, can cancel system of network of refractory steel turtleback, its life also rises somewhat.
All sorts of changing furnace liner, use temperature is 600~1500 ℃ , use sludge of aluminous acerbity brine commonly fireproof and pouring makings, low cement is fireproof and pouring makings and corundum are pouring makings, service life 3~6 year;
In coloured metallurgical industry, plumbic zinc is airtight blast furnace, show fast furnace, electrobath and rolling heating furnace to wait for hot project facilities, its are local with indeterminate form fireproof line expects.
The near future, on aluminous electrobath use extensively prevent permeate fireproof and pouring makings, obtained satisfactory use result; On the liner of steam boiler, use adventitious form is fireproof data is earlier, more general also. Use aluminous acerbity brine to mud pledges again or pledge gently commonly fireproof and pouring makings, service life is controlled 10 years.
Fluid-bed generates electricity boiler uses tall aluminium qualitative, corundum pledges with SiC character fireproof and pouring expect and fireproof but plastic, its intensity tall, wearability is good, satisfied design and use a requirement. Additional, in mechanical, fireproof burn with rubbish in waiting for an industry, also use indeterminate form fireproof material, obtain favorable result.
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