Mineral wool is one kind uses metallurgy broken bits to be the man-made fibre that main raw material produces, manufacturing technology includes: Fluid of already will fused hot broken bits adjusts what composition makes to achieve corresponding requirement, heat up broken bits fluid to be cast through centrifugal high speed after that swing a fiber, fiber classics is collected, arrange and solidify gets the product such as mineral wool board, felt.
Fluid of hot broken bits uses cupola normally broken bits of cold conditions metallurgy, coke and other complementary makings fuses obtain. Those who consider circular economy the sources of energy and resource is effective use, the by-product that more and more people thought of to use metallurgy process to form heats up broken bits fluid to make cotton directly. Can use by-product broken bits and heat energy at the same time so two kinds of resource. In using smelt to heat up broken bits fluid to make cotton product line directly, holding furnace of fluid of hot broken bits is very crucial equipment.
Holding furnace of fluid of hot broken bits is controlling the function in cotton process: ① makes fiber normally. Because go out,metallurgy by-product heats up broken bits fluid furnace and carry the temperature when waiting for a reason to enter holding furnace general under make fiber place require a cost; ② adjusts composition. According to different product demand, heat insulation of heat preservation of the wall outside be like is used board differ with the coefficient of granulated wool acidity that makes the ceiling, need adjusts broken bits composition. Finish two afore-mentioned tasks to all need heat energy to warm up heat preservation.
1, the inadequacy that at present lining of hot slaggy holding furnace exists uses metallurgy to heat up broken bits fluid to make cotton do not grow in domestic application time directly directly at present. Much home company is in industrialization early days, those who realize industrialization is rare. Holding furnace of fluid of hot broken bits runs the effect to all be paid no attention to in practice want, basically be lining uses up fast, furnace life weak point. Count 10d more, little a 6~7d, affected the efficiency of whole product line that make cotton and beneficial result.
The working flow of hot slaggy holding furnace is as follows: The time that every secure alternately is periodic, if 2~4h flows into fluid of hot broken bits from the mouth that enter broken bits, meanwhile slag tap is poured out of continually with a certain specific amount. The face of broken bits fluid inside holding furnace is reduced ceaselessly as flow time, should fall to there is fluid of new broken bits to fill again when a certain position.
In short, in producing a course, influent broken bits fluid is discontinuous, effluent broken bits fluid is successive. Its technological process causes loss to holding furnace lining: ① damage: The complement of fluid of new broken bits of frequent condition is caused to lining erode strongly; ② fire damage: Fill when fluid of new broken bits full when lining temperature is elevatory, put temperature of the lining when sky to reduce when broken bits fluid, heat bilges cold shrink to make lining produces thermal shock and be injured; Corrode of ③ chemical dip: Heat up on one hand slaggy react more or less with lining happening; Put the lining when sky to if charcoal brick can happen,expose certain in air material when broken bits fluid on the other hand intense oxidation reacts and loss.
2, the basis of train of thought that solves a problem afore-mentioned problems, put forward the train of thought of heat preservation of furnace hanging broken bits, hearth. Furnace hanging broken bits: In part of holding furnace cylindrical shell, cover the temperature gradient with be formed certain between interlining to furnace casing water from lining wall, this temperature gradient forms covering layer of a broken bits in lining wall, take effectively protection to lining. Hearth heat preservation: Because lining of ministry of heat preservation hearth is in broken bits layer to enclothe from beginning to end, the odds that is damaged and degree far under sidewall, again together with is in reduce consideration of heat energy losing as far as possible. Accordingly, lining of ministry of heat preservation hearth should ensure only do not produce leak can.
3, executive plan
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The cooling water that has shed water to cover takes away the heat energy that comes out from lining as carrier, charcoal brick is had high temperature resistant as good as hot conductibility good point but fight oxidation ability difference; Argillaceous brick bases is 2 oxidation silicon belongs to acidity and fireproof material, fight oxidation ability strong and as slaggy as heat produce chemical reaction scarcely but high temperature resistant function loses and hot conductibility can be differred.
Good position is: When holding furnace of flood of fluid of hot broken bits, covering layer of a broken bits is formed in wall of lining clay brick, appropriate temperature gradient makes broken bits layer maintains certain ply to protect lining. The effect that argillaceous brick takes in lining is sacrificial layer, even if clay did not form very good broken bits covering layer on bricky layer, because its are fought,oxidisability is mixed as slaggy as heat the characteristic that does not produce reaction also can make lining has certain service life period. When argillaceous brick layer consumes certain level new brick of OK and new step changes.
Lining of ministry of heat preservation hearth is in broken bits layer to enclothe from beginning to end, use charcoal the brick won't be oxidized and issueing charcoal brick to have excellent thermal stability without oxygen. Tall aluminous brick is below charcoal brick, tall aluminous brick is had high temperature resistant as good as heat preservation sex characteristic, can ensure hearth won't produce leak not to make bottom lining comes loose again at the same time heat is overmuch.
Stick between different material receive adoption data to differ. Holding furnace bottom uses tall aluminium between steel casing and tall aluminous brick pouring makings; Holding furnace cylindrical shell uses charcoal to pound dozen of makings character between steel casing and charcoal brick; Charcoal brick and clay use charcoal to pound dozen of makings character between the brick, ensure obtain good diathermancy to be able to be mixed respectively heat preservation function.
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