According to fireproof material different, steel wraps the construction method of liner to also differ, be like the choice of firebrick, construction method is body of build by laying bricks or stones, irrigate the alternative that builds material to build construction to irrigate, have by the bag breathe freely brick, also have without breathe freely brick, still work is changed breathe freely the brick.
Include the discussion of liner craft and test through of all kinds to the steelworks steel, liner of each place erode basic synchronism, improved the service life that steel surrounds, disappear includes leak accident besides steel, the fireproof material that dropped steel bag greatly is used up. Experiment of bag of steel of body of build by laying bricks or stones makes clear the firebrick of different raw material that different brickyard offers, use brick of aluminium magnesium carbon and system of build by laying bricks or stones of magnesian carbon brick, choose all steel jade brick and direct breathe freely brick. Below the case that uses continuously, the even age that pack rose 20 times, improved the service life that copper surrounds further. The steelworks can encounter steel to include the issue with small service life. All steel wrap exercise line build by laying bricks or stones to all use brick of traditional magnesium carbon to pile up, the even life that pack is not worth 10 times, broken bits line should change equably in use process 1-2 second. Discussed to pack the problem of the age, those who chose magnalium carbon brick and tall aluminous brick is integrated pack, make the age that pack raises the left and right sides, section of broken bits line does not need to change commonly.
Nevertheless, the service life that steel surrounds is very low still. Below this kind of circumstance, magnalium carbon brick and magnesian carbon brick chose after a year, make the even age that pack achieves 27~28 second, tall even 33. As the development of steel-making technology, the age that pack still is in ceaseless progress. The progress of the age that pack obtained remarkable economic benefits.
The permanent layer that steel wraps is irrigated entirely build, bottom exercise layer is jungly bottom. Molten steel of this program ability is pounded, easily knot bottom covering layer. Bottom has to give water opening, one breathes freely brick, build by laying bricks or stones of helix of layer of the exercise that wrap a wall is built, bag mouth irrigates the villatic mass that builds each place to use and likeness of large steel bag entirely.
(1) permanent layer is irrigated build. Bottom gives water opening. Air-vent supports a pattern, with half light pouring makings irrigate, ply should satisfy program requirement, exterior level off, tilt to mouth giving water slightly; Natural and dry after 24 hours, the mould is irrigated build a wall, requirement die device is regular, irrigate continuously build, section vibration. (2) the system of firebrick build by laying bricks or stones that operates a layer. The method of body of build by laying bricks or stones of bottom exercise layer and the method of body of build by laying bricks or stones with 250t bottom steel are same. After body of bottom build by laying bricks or stones is finished, the body of build by laying bricks or stones of layer of wall body work should begin from two trunnion, use system of slope brick build by laying bricks or stones, irrigate with the permanent layer near body of wall of general brick edge next build system of helix build by laying bricks or stones, till the mouth is anchorage,firmware solder dot falls. (3) is all the mouth that pack all pouring. Solder on casing of the steel that wrap a wall anchorage firmware, prop up inside model, with aluminium magnesium pouring makings irrigate, with vibrating head brace up pound close-grained, wipe along Bao Bian smooth.
Installation breathes freely methodological steel bag of the brick is phyletic and various, system of use build by laying bricks or stones is fireproof material is varied also, but the structure is general and identical, by bottom and wall two parts are comprised, construction of build by laying bricks or stones of line of introductory steel bag is mixed today breathe freely device method of the brick. Steel bag is used breathe freely the brick breathes freely bricky setting depends on the water quantity of steel Bao Gang. The quality of mixture function asks and exercise the craft road that steel plants. When the place that includes the bottom part that blow air in choice steel, the end that should include processing according to steel will decide. Breathe freely the position that bricky device is in bottom center and the place that deviate steel includes a center (the 1/2 that blows gas dot to be in bottom center? 1/3 radius) blow gas to differ to the mixture action of molten steel, the argon gas of ministry of the bottom of the heart in steel bag is helpful for steel including the response between broken bits gold, gas of prejudicial bottom argon is helpful for the desulphurization reaction; that is helpful for a broken bits steel bag mixes in-housely and of temperature change equably, and the float of field trash. For example, of CAS/CAS-OB breathe freely the central place that the brick needs installation to include floor in steel, because this craft asks argon gas is blown,immerse the surface of steel fluid broken bits below the cover, be changed in order to satisfy the alloy in athletic process or the requirement of gush oxygen. Requirement of LF furnace craft will breathe freely the position that bricky installation is approaching LF furnace door, in order to satisfy the requirement that the carbon in athletic process imposes carbon, alloy and to oxigenate. Steel bag breathes freely bricky device is more, the amount that persnickety bubble produces is more, the effect with sundry purify is more apparent, molten steel quality is better. But facility amount is more, the risk of leakage steel is bigger. Generally speaking, when exercising common carbon steel, the steel bag under 70t can choose to breathe freely brick; The steel bag need of 70t above breathes freely twice brick. Breathe freely the form can divide bricky device to be mixed for interior exterior. In-house type is to point to assemble beforehand outside steel bag breathe freely the brick is mixed a brick. When build by laying bricks or stones builds steel to wrap, clear bottom breathes freely bricky direction. After build by laying bricks or stones builds mat brick, breathe freely those who take a brick bricky hoisting arrives this position, next ordinal build by laying bricks or stones builds bottom and liner. Exterior type by brick, set brick and breathe freely bricky composition. When build by laying bricks or stones builds steel to wrap, bottom and wall can be built in the build by laying bricks or stones after bottom installs a brick. Hind, mix the brick breathe freely of the brick outside side besmears equably mud of suffer from excessive internal heat, ordinal exert oneself to do sth. installation is present in the brick, will fill up a brick next sealed mix in the brick breathe freely bricky bottom, the flange on the lid is roast. Interior breathes freely the brick applies to steel brick of the line end the bag and breathe freely bricky service life is synchronous, externally mounted is applied to often change breathe freely bricky circumstance. Because interior breathes freely bricky security is low. Dependability is poor, change arduous. Current, almost all steel bags are used exterior breathe freely brick.
Construction of steel bag liner wraps fireproof material construction to be with factory large section exemple, the plane that pack is bottom, bottom has two to breathe freely brick, body of build by laying bricks or stones of the annulus that pack, brick of permanent layer tall aluminium, operate brick of carbon of layer aluminium magnesium, brick of magnesian carbon of section of broken bits line; The construction that pack adopts hydraulic pressure lifting platform. (Permanent layer build by laying bricks or stones is built by 1) bag: 1) before bricklaying, check steel structure to whether accord with requirement of body of build by laying bricks or stones in the round above all, affirm to bricklaying undertakes again after qualification; Pull down bottom reticle above all, check the flatness of bottom armor plate, local inhomogenous with small expand irrigate build material or slop make level. 2) is bottom center datum mark with direction of two trunnion reciprocity, draw a line anticlockwise direction turns after 45 ° , laid carries a brick of permanent layer tall aluminium on the head, outward appearance of substance of build by laying bricks or stones carrying a layer on the head turns 90 ° , brick of tall aluminium of the 2nd permanent layer; Two permanent layers are mixed to water mouth breathe freely place obligate square aperture; Obligate of predestined relationship of steel bag hemline is dentate clearance, with small expand tall aluminium is irrigated build material semmetry to irrigate build, separate lamination fact; Body of build by laying bricks or stones controls exterior flatness with horizontal feet. 3) in obligate of mouth giving water the build by laying bricks or stones inside square aperture builds mouth giving water to fill up a brick. Of brick of mat of mouth giving water inside bore diameter must the internal diameter with metallic hole wall is homocentric; On brick of mat of mouth giving water build by laying bricks or stones builds mouth giving water brick. Mouth giving water the clearance all round the brick should be irrigated with corundum build material semmetry to irrigate build. Irrigate vibration answers when building. Brick of not mobile mat and mouth giving water bricky direction. Mouth giving water irrigates the height that builds material to be with the horizontal of the 2nd permanent layer accurate.
(2) the permanent layer build by laying bricks or stones that covers wall put oneself in another's position is built. Hit circuit to irrigate along bottom brim mould build material, ensure enclothe juncture of annulus of permanent layer inside and outside to stagger. Irrigating build material to go up, the permanent layer that enclothes a wall to carry a layer on the head build by laying bricks or stones of tall aluminous brick becomes certain height, seam build by laying bricks or stones of brick of core tall aluminium build by laying bricks or stones to build into the fault next, control the exterior flatness of every annulus with horizontal feet; Treatment brick closes the door in trunnion area, add up to door brick to stagger up and down; Permanent layer is built in on on fender of steel bag edge, with compound small expand irrigate build material plug Bao Bian. (3) build by laying bricks or stones of bottom exercise layer is built. Steel bag is permanent after the layer is dry, laid gives water opening brick. Give water mouth to answer homocentric, give water opening brick of carbon of laid circuit aluminium magnesium answers all round the brick, next laid of one by one breathes freely the bottom exercise layer of bricky direction; Laid breathes freely obligate square aperture, first laid appears air cushion brick, installation breathes freely brick; In breathe freely the aperture place all round the brick is irrigated build corundum to irrigate build material, height with bottom the horizontal of the 2nd permanent layer is accurate. Irrigate the make level after building material condensation, in breathe freely all round the brick brick of carbon of laid circuit aluminium magnesium, brick and breathe freely bricky contact is seamed should control in Lmm less than; Next the brick of bottom exercise layer with complete laid, the brim leaves zigzag gap, irrigate symmetrically build expand irrigate build material. (4) build by laying bricks or stones of layer of the wall body work that pack is built. Build by laying bricks or stones of annulus of brick of wedge of aluminium magnesium carbon is built should special caution, stand by and perpendicular wall is permanent layer, go up with what burnish of hand emery wheel controls a brick strictly the surface; Brick of aluminium magnesium carbon and brick of magnesian carbon of broken bits line, notice clearance, check those who control a brick to go up with feet the surface; Machine door of bricky trunnion area, fluctuation door brick is stagger; The clearance between brick carrying annulus on the head and fender is used irrigate build stuff stuff, nap is brae. (Liner of 5) steel bag is fireproof after material construction, still should besmear antirust coating equably go up in bag bottom and Bao Bi. After aluminium magnesium dolly, developed it is raw material with tall bauxite grog and agglomeration magnesia, the aluminium magnesium that is group mixture with liquid water glass is irrigated build material. Be in 65 during, aluminium magnesium is irrigated build material application to be wrapped at small-sized steel, obtained outstanding applied result. For example, steelworks is medium or small steel bag uses water glass aluminium magnesium to irrigate build material, the even age that pack is 109.7 times, be argillaceous brick liner 8 times much. Steelworks is medium or small steel bag, use aluminium magnesium to irrigate build material, the age that pack is 53 times, age of argillaceous line bricklaying is 6-10 only second.
Forgive of all steel bag notes liner technology to all be labelled new technology of key of former metallurgy ministry implements a project. Current, converter is used under 30t medium or small steel is wrapped (45t the following capacity) , use more irrigate completely build liner. All irrigating the service life that builds liner is 40-60 more second, bag of partial little section can be amounted to 90 times. Be able to bear or endure cost of material and liner cost drop considerably, obtained remarkable economic benefits. Steel bag aluminium magnesium is irrigated build material to be mixed with alumina magnesian for bases, magnesian can participate in aluminium magnesium pointed spar, also can participate in magnesia. Aluminium magnesium is irrigated building material is a kind of application is irrigated extensively build material, basically use at steel bag and RH finery, also be extensive, deepen irrigate build one of material. Aluminium magnesium is irrigated build material to be able to be divided irrigate for common aluminium magnesium build material and aluminium magnesium to irrigate build material. Former it is main raw material with aluminous grog, say again aluminous base aluminium magnesium is irrigated build material; Latter is main raw material with electric frit corundum or agglomeration corundum, foreign matter is little, call aluminium magnesium to irrigate build material or corundum magnesium to irrigate build material.
What is the advantage with all steel pouring bag? 1. Liner performance is good, not easy craze falls off. 2. Liner use time is longer, safety factor rises, won't appear steel bag is aglow, wear the accident such as the bag. 3. Construction is convenient, time limit for a project is short. 4. Steel wraps later period maintenance to go to the lavatory, maintenance cost drops.
How pouring steel bag construction is preparative work above all. (1) assures pouring makings is as dry as a chip before use, without agglomerate. (2) examination is irrigated build facility whether in good condition nondestructive, whether can work normally. (3) whether has been caul installed, each place dimension is reasonable, the distance is even. Caul surface Tu Youzu lies between an agent, facilitate irrigate the drawing of patterns after building. (4) plans appropriate oscillation club, ensure pouring makings vibration is close-grained. Agitate works. (1) irrigate the amount that builds material certainly according to the capacity of mixer and construction speed. (2) basis construction case, the quantity that add water is controlled in 4%-5% commonly, in order to assure good liquidity, prevent pouring makings is too too thin, stiff. (3) mixes pouring makings should use inside 30 minutes, overtime. Without fluidity disuse. Pouring exercise. (When 1) feed in raw material, unwrap oscillation bar, oscillation of edge of edge feed in raw material, hind of feed in raw material is again even oscillation, ensure without bleb eduction. (2) first ladle bottom, the mould is set to irrigate the wall that build a packet again after bag bottom is caky. (When 3) irrigates the wall that build a packet, should successive and even feed in raw material, whole Bao Bi is finished irrigate build. (When 4) uses oscillation stick, want inch, not too fast too slow. Drawing of patterns and safeguard. Hour of the 16-24 before drawing of patterns, time of detailed drawing of patterns is with execution condition and climate accurate. The nature after drawing of patterns safeguards time to be not gotten little at 24 hours. Roast and roast when, temperature and roast time should not be too fast, the detail seeks advice from technical personnel please.
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