Reductive furnace uses fireproof data reductive furnace is to use argillaceous firebrick to build furnace normally, regard heat preservation as the brick with light qualitative firebrick, heat preservation brick is outer it is asbestine board or aluminous siliceous cotton insulation material. But the brick that hold coal tub in the palm and brick of coal tub mouth are good use tall aluminous brick. Furnace vault can be built with build by laying bricks or stones of tall aluminous brick, also can use tamp of tall aluminous fireproof mud, the aluminous siliceous cotton that a 50-100mm must spread on roof makes heat-insulation layer. Hearth flue uses argillaceous firebrick build by laying bricks or stones is built. Reductive furnace builds furnace to undertake by blueprint, from bottom to top, arrive from hearth namely roof, maintain a level, the top is sealed after, the fluctuation when building furnace hangs down not to have rake continuously. It is good that firebrick brick seams Yue Xiaoyue, the surface does not have apparent protruding sunken phenomenon inside. The plaster that builds furnace to use for this requirement has particular demand, cooperate by certain proportion (raw material and grog) of each 50 ％ , and want smooth, carry secretly does not allow to give birth to face or a knot in one's heart in plaster, more not eyewinker of be patient of exists. The brick seams general firebrick be less than 2mm, the plaster of firebrick surface should be blown, not be patient of drips the phenomenon of the oar. Firebrick cannot get wet in the rain, vertex damage and lack an edge, the firebrick of damaged cannot furnace of build by laying bricks or stones. Reductive shaft furnace is fireproof concrete lining structure is reductive a kind of equipment that shaft furnace is hematite of magnetization roast deficient. The deficient hematite that its utility is will weak magnetism (Fe2O3) , have natural magnetism ore deposit through magnetizing what roast makes to become (the property of Fe3O4) , satisfy at the requirement of mineral separation craft thereby. The introduction issues reductive shaft furnace below structure of fireproof concrete lining. Bottom of reductive shaft furnace has steeliness cistern bridge, bear the weight of whole body of heater and charging, upside is the chamber of a stove or furnace. Cent of from above to below of the chamber of a stove or furnace is taken for warm-up (temperature is less than 800 ℃ ) , add tropics (temperature is 800, 850 ℃ ) with reductive belt (temperature is 570, 620 ℃ ) . The chamber of a stove or furnace adds tropics two side set firebox (temperature is 1050, 1250 ℃ ) , hot course burning gas guides igneous aperture enters the chamber of a stove or furnace. Ore (bead diameter is 25, 75 millimeter) enter the chamber of a stove or furnace from roof, via reductive area reaching after warm-up and roast, after what connect from bottom is gas and reductive, by cistern bridge eduction of the lower roller that discharge mine. Profile of body of heater of 50 meters of 3 reductive shaft furnace. Body of heater is 8724 millimeter high, long for 6728 millimeter, wide for 5234 millimeter. Body of heater of reductive shaft furnace uses fireproof concrete prefabricated components entirely, steeliness cistern bridge also uses fireproof ferroconcrete prefab bridge place is replaced, use result is favorable. Fireproof ferroconcrete is prefab bridge is to use aluminium, 60 cement or aluminous cement do cementing agent, clay qualitative or tall aluminous aluminous aggregate, fine pink, spot vibration shapes. After mechanical hoisting, cast-iron fender is installed in the working facing of bridge, fender upside build by laying bricks or stones the firebrick with 120 thick millimeter, with bridge go up watch face is neat. It and mandarin orange of steeliness cistern bridge are compared, have changeless look not the characteristic of bending, because of this aborning width of the mouth that discharge mine changes not quite, mine of platoon of direction of length of edge body of heater is even, the roast quality of ore is good, also need not flinch artificially mine, reduced labor intensity, but managing rolled steel and many industrial water, in the meantime, the cost of every bridge reduced 50 ％ , service life rises double much, and need not in small long, raised furnace exercise rate. But, temperature of furnace bottom environment lifts somewhat, equipment of rush to repair cools not easily, disadvantageous also water. The warm-up belt of reductive shaft furnace and reductive belt lining uses water glass clay to pledge or prefabricated components of tall aluminous qualitative fireproof concrete, every are weighed 500, 1200 kilograms, add up to 100; Add intertropical lining, guide igneous aperture and burner brick use phosphoric acid to stick earthy and fireproof concrete (grog of 2 class alumina does pink to expect) prefabricated components, every are weighed 510, 1650 kilograms (burner brick sheet weighs lesser) , add up to 50, firebox lining uses aluminous cement prefabricated components of tall aluminous qualitative fireproof concrete, every are weighed 930, 2000 kilograms, add up to 46. The fireproof concrete prefabricated component that complete furnace uses adds up to it is 196. Mechanical hoisting. The level is seamed use build by laying bricks or stones of aluminous cement slop to build, vertical lap seam should leave square or circular grouting hole, use the concrete that pledges with material with prefabricated components pouring. Fireproof concrete lining uses reductive shaft furnace more than 4 years, at present still in use. Production carries out a proof, use fireproof concrete prefabricated components, lining whole sex is good, without be out of shape apparently and batter phenomenon; Working surface wears away less, level off is smooth, showed water glass and phosphoric acid are fireproof the compression intensity of concrete is high, the characteristic with wear-resisting good performance. In the meantime, basically put an end to guide the knot tumour phenomenon of igneous aperture, enlarged the area of virtual be affected by the heat of ore, be helpful for thermal efficiency rise. Anyhow, after using fireproof concrete, can realize mechanization to build furnace, prolonged furnace life, charging direct motion, roast quality is good, raised exercise rate. Because fireproof concrete is in,cistern bridge and liner of the chamber of a stove or furnace use a success, transform for reductive shaft furnace offerred a condition. Some works falls in the circumstance with changeless over all dimension of body of heater of reductive shaft furnace, will add intertropical the chamber of a stove or furnace transverse dimension by former 450 millimeter broaden comes 1044 millimeter, add 6 cross Liang Yicheng to carry the dynamic load of stock. In the meantime, warm-up belt and reductive belt also adopted relevant measure, what enrage in order to improve charging and furnace is even distributing and direct motion. Furnace is effective cubage by former 50 meters 3 increase 70 meters 3. Cross bridge is to use heat-resisting cast-iron make, two end are put in phosphoric acid to stick prefabricated components of earthy and fireproof concrete to go up, reductive belt liner uses water glass not to bake bricks build by laying bricks or stones is built, the others place and before narrate material to pledge identical. Furnace after transforming, effective cubage enlarges furnace 40 ％ , the crop when the stage increases nearly 80 ％ , rules and forms of classical poetic composition of magnetism chemical combination raises 5.2 ％ . Furnace moves more than one year, furnace condition is normal, stock direct motion, realized increase production not to add a person, odd heat output turns over index. Fireproof concrete use case is good. Fireproof material occurrence craze, fall off, easy how to wear away to do? Want to solve a problem thoroughly, need to be dug from germ, the analysis gives real reason, flourish Cheng Naicai is engaged in be able to bear or endure service of timber production, research and development is old, can solve all sorts of difficulty problems of liner of furnace of high temperature kiln, welcome broad new old friend to seek advice reach technical communication.
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