Bake charcoal brick lining heats up the application on furnace in large ore deposit oneself

Bake charcoal brick lining heats up the application on furnace in large ore deposit oneself. Bake charcoal brick is to go up oneself a kind of when the century considers to develop at the beginning of seventies new-style charcoal builds furnace material character. Be in only at first medium or small use on mine hot stove and calcium carbide furnace, as the maturity that uses a technology, heat up in puddling blast furnace and large ore deposit stage by stage use on furnace. In application of mine hot stove, because bake the whole of charcoal brick lining is not had oneself,seam structural characteristic, place of together with taphole uses black lead charcoal after one carbonization silica brick, in use process, life of generation furnace life is in smelt rose below the circumstance of congener product 3 times the left and right sides, it is especially in smelt of product of small broken bits, generation furnace life can achieve 10 years of above.

1, the characteristic that bakes charcoal brick builds furnace oneself
Bake oneself apply without what seam a technology to heat up furnace in mine, the heavy catastrophe that solved brief life of hearth ooze iron, lining basically is inscribed, the craft condition of electric stove was changed on certain level, realized high load capacity, high furnace temperature, it is increase production energy-saving fall bad news laid a foundation. The build by laying bricks or stones that bakes charcoal brick heats up furnace to go up in mine oneself builds the method building furnace with the tradition to differ somewhat, avoided to use roast charcoal piece is wide the defect that seams build by laying bricks or stones to build. Build by laying bricks or stones is built bake the form a complete set when charcoal brick uses anhydrous to press slop oneself namely charcoal element puddle (１ seeing a table) with size (also say fine seam paste, see a table 1) apply force impaction, the microtherm tack that charcoal brick annulus seams performance characteristics to match is burnt (see a table 1) pound solid. All charcoal bricks should undertake machining entirely and beforehand build by laying bricks or stones. Taphole place uses the charcoal of half black lead with the good performance that fight broken bits one carbonization silica brick. Charcoal qualitative hearth, lining all should accord with the treatment of integration and construction precision standard. Bake charcoal brick hearth, lining uses condition of the reproducibility inside drying-out and the quantity of heat in producing a course and furnace oneself, progressively graphitization, bake the charcoal with strong sex of firing and solid, compact whole pledges next lining, and as temperature the elevatory happening that change character, namely charcoal is changed character to black lead character. Bake oneself charcoal brick (see a table 1) the compact whole that seams at notting have approximately is formed below high temperature, make alloy permeates hearth hard, raised lining greatly fight corrode ability, achieved the goal that prolongs lining life, make production undertakes for long continuously as far as possible, raised the utilization rate of electric stove, increased heat conduction and electric performance, raised bath temperature, benefit is inserted greatly at electrode, at the same time managing also cause because of stopping furnace all sorts of using up.


Express puddle of 1 charcoal element, size, low temperature to tack is papered and bake charcoal brick manage changes target oneself
Ability of hearth accumulation of heat increases, make difficult frit impurity not easy and caky inside furnace, and the eduction of high temperature liquid that follows flow very easily, make hearth rises not easily.
Microtherm charcoal pounded the application of makings to improve labor condition of the worker, when avoiding build by laying bricks or stones of roast charcoal brick to build wide seam pound dozen mix falsely roast when the ooze iron phenomenon that contract and appears.
2, bake the build by laying bricks or stones of charcoal brick is built oneself
1) standard requirement should be accorded with on the norms of the material that build furnace, breed and quality. Especially the charcoal of half black lead of taphole place one char silica brick, must take abnormity precision work, give out lining structure pursues (１ seeing a picture) .

2) ask by lining structure plan build by laying bricks or stones is built strictly. The asbestine felt with 10 ～ thick 20mm is spread in point of spring of hearth, boiler setting, boiler setting uses step of side of brick of light qualitative clay one; Hearth side build by laying bricks or stones two, be able to bear or endure with clay entirely fireclay build by laying bricks or stones is built.
3) in hearth upside of brick of light qualitative clay makes the same score firebrick of tall aluminium of build by laying bricks or stones, rely on boiler setting closely brick of light qualitative clay, its lining build by laying bricks or stones builds firebrick height basis to the specific measure of furnace casing and craft ask and differ somewhat.
4) in the process that build furnace, bake charcoal brick and firebrick intermediate zone use tall aluminous fireproof cement oneself, use build by laying bricks or stones of crowded oar law to build by certain proportion.
5) taphole inside and outside uses the charcoal of half black lead with good prior operation build by laying bricks or stones of one carbonization silica brick is built, two side are secured with tall aluminous firebrick, transfer place is pounded make phosphate combine tall aluminium but plastic.
6) be in next bake oneself the exterior build by laying bricks or stones of charcoal brick the firebrick with thick ｍ of a 30 ｍ , so that its are protected in drying-out process,be not oxidized by high temperature place.
7) bake charcoal brick lining asks to temperature rise in drying-out initial stage oneself particularly strict, in every temperature rise paragraph should have enough heat preservation time. Some factory schedule of temperature rise of initial stage of drying-out of 16.5 MVA electric stove, see a table 2.

Watch 2 bake reference of time of temperature rise of charcoal brick lining, heat preservation is expressed oneself
3, the applied value that bakes charcoal brick heats up electric stove to go up in mine oneself
The life of mine hot lining basically depends on degree of corrode of taphole place dip, and one carbonization silica brick can solve charcoal of half black lead relatively this one problem; But this material produces aerification easily below high temperature condition to react with the water in blocking mud up, bare be oxidized easily also at air part, and use anhydrous to blocked mud up to solve this one problem.
16.5 MVA electric stove uses some plant roast charcoal brick, half an year needs overhaul taphole, every season needs to heavy repair after. Every overhaul a taphole needs time 4 days, expect to protect electrode, heating furnace after power transmission, raise furnace temperature to want to use up nearly 100 thousand degrees of report to restore furnace condition, restore to need time 3 days, conserve of iron mouth overhaul needs 7 ～ 10 days, should heavy repair next another iron mouth. Process of so whole overhaul arrives when restoring production to need 15 ～ 20 days, use up all sorts of material 30 ｔ of 25 ～ , bad news report makes an appointment with 20 ～ 300 thousand degrees; In 8 days of iron mouth overhaul period production is interrupted, affected index of technology of crop and each economy directly.
Use after baking bricky build by laying bricks or stones builds charcoal to use anhydrous to block mud up oneself, overhaul period lengthens two years of above, bake charcoal brick material and build by laying bricks or stones build charge to make an appointment with 10 ％ higher than using the fee of roast charcoal brick oneself, but overhaul place brings opposite iron mouth to decrease considerably however with overhead expenses directly, relative economic value put oneself in another's position comes out now.
4, epilogue
1) if use,bake oneself charcoal brick lining and use anhydrous of form a complete set blocks mud up, furnace life will be longer, the effect will be more apparent.
2) bake the quality of charcoal brick is mixed oneself the method that build furnace is the foundation that assures lining life, drying-out is among them crucial step.
3) bake oneself life of charcoal brick lining is relatively longer, economic value is overt, be worth to popularize.