Does fireproof material have torpedo pot what characteristic? Regard metallurgy as the important segment of the industry, fireproof material must have pot of torpedo of molten iron pretreatment sex of shake of good acid-proof sex broken bits and basic slag aggressivity, heat-resisting and be able to bear or endure flake quality.
Generally speaking, not the torpedo canister of desulphurization is used firing argillaceous brick or andalusite brick, liner uses argillaceous brick commonly or common build by laying bricks or stones of tall aluminous brick is become. Line of iron mouth, broken bits fragile place uses build by laying bricks or stones of tall aluminous brick to build. For even attaint liner, use heat of body of integrated build by laying bricks or stones, erode place badly to use not flaming andalusite charcoal brick, broken bits line uses aluminous carborundum charcoal brick. The aluminous silicon firebrick of fire is used at the coping that easy oxidation injures. Concussion area uses high grade aluminous carborundum commonly carbolic brick.
Iron fluid takes off bag of iron of to decoke of silicon, dephosphorization to submit torpedo form normally, because this calls torpedo canister or torpedo car normally. Torpedo canister gets not only of common iron bag corrode, and those who be assisted material by metallurgy is serious corrode. For example, desulphurization agent is Cao-CaF2-CaC2, the agent that take off silicon is scale or lime normally, dephosphorization agent is Feo-CaO-CaF2 or Na2CO3, fireproof to expensive aluminous series material has very serious melt to corrode with oxidation. Accordingly, fireproof material should have canister of torpedo of iron fluid pretreatment to be able to bear or endure exceedingly goodly the heat-resisting vibration with acerbity alkaline caustic, alkaline corrosion resistance, good broken bits and be able to bear or endure come off quality.
Torpedo canister firebrick damages the heat-insulation layer of reason torpedo canister is brick of light qualitative clay or brick of heat preservation clay commonly, working layer is tall aluminous firebrick. When adding desulphurization agent, bitumen and dolomite firebrick or andalusite firebrick are united in wedlock. Tall aluminous firebrick is used at iron mouth and broken bits line. Mo Laishi firebrick. Torpedo canister reason: 1. Firebrick liner suffers concussion of high temperature molten steel, erode wear away, thermal shock is strong, thermal stress is great; 2. Firebrick counteracts the chemistry in molten iron to erode in molten iron, make the oxidation of firebrick and firebrick. Molten iron empties temperature drops quickly, produce thermal stress.
Mix iron car or box of fish and water to the function of fireproof material and abbreviation of molten iron of requirement torpedo type, it is one of equipment that lade and carry molten iron. Box of torpedo molten iron mixes the main function of iron car to have: (1) mixture molten iron, ensure molten iron is even; (2) blast furnace molten iron carry comes steelworks; (3) molten iron pretreatment. Fireproof material has liner of mixture iron car to erode action below: (1) molten iron and slag lade time is long, chemistry is eroded serious; (2) in using cycle, the temperature wave motion that clearance exercise causes is eroded with what thermal stress causes can make fireproof material organizes aggravation and attaint. (3) if desulphurization, dephosphorization undertakes in mixture railroad traffic, take off silicon (the following abbreviation takes off silicon 3 times) processing, as a result of the change of working requirement, have the following effect to fireproof material: 1) 3 times desulphurization inorganic agent is opposite of fireproof material erode action, among them chemistry is eroded serious. 2) be in 3 in taking off processing process, the change of slag alkalinity can affect fireproof data. The agent that take off silicon is low round of high speed railroad; Dephosphorization. Desulphurization agent alkalinity is tall. The change of slag alkalinity from 0.5 turn into 3 above. 3) gas (N2) the influence that mixes pair of fireproof material.
Fireproof material must have liner of the car that mix iron the following function: (1) get used to what chemistry causes to corrode, have be able to bear or endure goodly furnace sore is caustic, be in especially wiring place. (2) get used to what hot action causes to corrode, have good heat-resisting vibration stability. (3) the attaint that gets used to mechanical action to cause. This kind of attaint is by lade, carry and molten iron pours out of a process to wear away mediumly to be caused with the vibration in fine process. Fireproof material should have high strenth and wearability, pound place in molten iron especially. To not the torpedo canister of desulphurization, use agglomeration saggar brick or andalusite brick normally. The common component of liner by firebrick or common composition of tall aluminous brick. Line of nozzle of iron fluid to load, broken bits perishable corrode component is made by tall aluminous brick. To make sure rate of steel liner attaint is same, corrode place the badliest to use did not light andalusite brick, broken bits line uses alumina carborundum carbolic brick, coping uses alumina silicon firebrick, easy oxidation damages. Carbolic brick uses carborundum of high grade alumina at pounding area normally.
To taking off the torpedo canister of silicon, dephosphorization, to decoke, working requirement is very slashing, firebrick and tall aluminous brick cannot satisfy a requirement, because this often uses Al-SiC-C brick. But to tall alkalinity and tall oxidation inorganic agent, al-SiC-C brick is not applicable, brick of carbon of oxidation aluminium magnesium and oxidation aluminium magnesium are irrigated building material is a very good choice. According to research, desulphurization torpedo canister should use magnesian carbon brick or magnesian carbon calcic brick. To taking off silicon and dephosphorization torpedo canister, magnesian carbon brick provides those who have ideal to fight a gender to inorganic agent. Tall alumina is fireproof material is not applicable, because alumina is easy,with oxidation calcium liquefaction reacts. The actual condition of different steelworks is different, the scale that takes off silicon, dephosphorization, to decoke is different also, should choose fireproof material.
Spray gun is the important structure of iron fluid pretreatment. The condition that it changes in fast temperature from beginning to end leaves the job: Immerse quickly in use process in the iron fluid in 1300 ℃ above, after using return room temperature quickly. Accordingly, have very high demand to the hear resistance of spray gun. The crackle that thermal shock causes and iron fluid are permeated is two when bring about spray gun to pound attaint main factors. Steel fiber enhances corundum Molaishi is pouring makings use as normally spray gun is fireproof material. Rise as what corrosion resistance asks, carbon is pouring the development of makings, thermal shock function rises significantly.
Torpedo canister liner repairs material of torpedo canister liner to be argillaceous brick, sodium stone brick to wait commonly, working layer basically is silica brick of compact clay brick, aluminous carbonization to wait. 1. Local rehabilitate liner. As a result of the circumstance different, if the situation is different, of broken bits of position of line of the concussion of molten iron of the high temperature when be like iron, broken bits erode, eject to decoke, eject sheds a molten iron that cause to move erode, desulphurization agent itself is right of the brick erode etc, bring about torpedo canister liner possibly to erode inhomogenous. Although was adopted,improve the firebrick material, the way to deal with a situation that adds thick firebrick number of plies, but still exist erode inhomogenous phenomenon, serious when the likelihood appears local indentation. To the place of iron of likelihood occurrence ooze or leakage iron, undertake local mining and maintenance, call normally medium or small maintenance. This kind of maintenance is in normally the metaphase of coal tub age undertakes.
2. daily gush fills. Daily spray replenishers is the important step that prolongs service life of torpedo canister liner. Although be in coal tub, use the coal tub liner of the balance, but of actual canister liner eroding always is inhomogenous, stop as a result of the local attaint of coal tub liner to safeguard normally. Accordingly, daily spray replenishers is the method of a kind of special economy, can pass in local erode place spray the service life that a few data will come lengthen coal tub liner.
Sparge cent is wet with dry method: Wet sparge replenishers is sparge replenishers and the water that measure certainly adjust size, use at sparge replenishers. Of sparge replenishers enclothe rate depend on the pressure of nozzle. The distance of nozzle and sparge complement surface and sparge complement ply. Replenishers of dry method sparge is in dry state, mix with water next. The main good point of replenishers of dry method sparge is: ① sparge replenishers water is little, corrosion resistance is good; ② can use the adhesive of fast sclerosis to have thick layer repair; ③ need not shift to an earlier date form a vesicle, the operation is agile, equipment jams little. To increase the adherent force of sparge replenishers and high temperature strength, adhesive is added in sparge replenishers, basically be to get together phosphate, in order to enhance high temperature intensity and adherent power. Current, the sparge complement of torpedo canister uses dry method commonly.
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