CN103983101A - Energy-saving rotary kiln and furnace lining fireproof brick building slurry - Google Patents
Energy-saving rotary kiln and furnace lining fireproof brick building slurry Download PDFInfo
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- CN103983101A CN103983101A CN201410189545.1A CN201410189545A CN103983101A CN 103983101 A CN103983101 A CN 103983101A CN 201410189545 A CN201410189545 A CN 201410189545A CN 103983101 A CN103983101 A CN 103983101A
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Abstract
The invention discloses an energy-saving rotary kiln and furnace lining fireproof brick building slurry. The energy-saving rotary kiln consists of a cylindrical steel body kiln shell, a plurality of high-temperature fireproof brick steel plate dies, and steel plate die supporting columns, high-temperature fireproof bricks and fireproof brick building slurry which are welded together, wherein the fireproof brick building slurry is high in filling property, contractibility and sintering performance. The intensity is high, and the furnace condition of a blast furnace can be kept stable (the depth of an iron notch, the fluctuation of the smelting time and the full-blast plugging rate), so that the yield of the blast furnace is increased; the slag resistance performance is high, and the energy-saving rotary kiln can resist corrosion and scouring; no crack is generated during quick heating, so that the combination strength is high; the energy-saving rotary kiln has certain contractibility under high temperature and is high in ventilation property and high in intensity, so that the phenomenon that the fireproof bricks are broken due to expansion in a high-temperature environment is avoided.
Description
Technical field
The present invention relates to Industrial Stoves field, be specifically related to energy-saving rotary kiln and this rotary kiln furnace lining laying fireproof bricks mud; It is the stove that is applicable to the sintering processing such as metallurgy, cement, chemical industry, lime.
Background technology
Rotary kiln (rotary kiln) is applied to the with a long history of the sintering processing such as metallurgy, cement, chemical industry, lime, traditional building method is that be positioned on refractory liner masonry of Rotary Kiln to two/a period of time with two one, lumps of wood one side, then with three of leading screws, withstand respectively two ends and the middle part of the lumps of wood, make kiln body Rotate 180 degree then build 1/2nd of remainder by laying bricks or stones, the weak point that such building method is embodied in production practices is: in practical application, safety coefficient is low because no matter international refractory liner is as in refractory brick, national standard has positive negative error, therefore the refractory liner laying can not be in same level, if tightly or in operation all can there is not at any time personal life security hidden danger in leading screw top.Inefficiency: the longlyest while building by laying bricks or stones with leading screw at every turn can only build three meters by laying bricks or stones, the time that once build by laying bricks or stones the soonest on every top needs three days, as time of 80 meters of long masonry of Rotary Kiln needs about 80 days, and labor strength is high, used tool involves great expense while building by laying bricks or stones.Required energy consumption increases, and has improved entreprise cost.
Summary of the invention
The object of the present invention is to provide a kind of energy-saving rotary kiln and this rotary kiln furnace lining laying fireproof bricks mud, have that speed of application is fast, a good effect of long service life, laying fireproof bricks stabilized structure, to overcome the deficiencies in the prior art and defect.
Realize above-mentioned purpose for this reason, the present invention has adopted following technical scheme: described energy-saving rotary kiln, and in steel body kiln shell cylindraceous, several highiy refractory brick steel moulds and welding, steel mould pillar, highiy refractory brick, laying fireproof bricks mud together forms; It is characterized in that: in the arc of the positive bottom of steel body kiln shell, be welded with and connect integrally-built highiy refractory brick steel mould, a side of highiy refractory brick steel mould is welded with one end of steel mould pillar, it is inner that the other end of steel mould pillar is welded on steel body kiln shell; Between highiy refractory brick, be marked with laying fireproof bricks mud; The height of highiy refractory brick steel mould is 2/3rds of highiy refractory brick height, and the width of highiy refractory brick steel mould is consistent with the width of highiy refractory brick, the consistency of thickness of laying fireproof bricks mud between the thickness of highiy refractory brick steel mould and highiy refractory brick;
Laying fireproof bricks mud is comprised of the raw material of following weight portion: brown fused alumina micropowder---and 15 parts; Alumine fine powder---35 parts; Bentonite---20 parts; α-AL
2o
3---5 parts; Silicon carbide micro-powder---5 parts; Sericite---5 parts; Mullite powder---15 parts; Guangxi white clay---8 parts; Aluminium dihydrogen phosphate---4 parts; Sodium phosphate trimer---0.02 part; Calgon---0.15 part.
The preparation method of laying fireproof bricks mud: the raw material by above each component, mix by weight, fully stir, pack in airtight container, during use, add water and fully stir as muddy, directly use; Raw material: water=100: 22-26.
The raw material that laying fireproof bricks mud is selected has following feature:
Brown fused alumina micropowder: brown fused alumina micropowder is that to take bauxite, coke (anthracite) be primary raw material, in electric arc furnaces, through pyrolytic semlting, form, the grinding tool made from it, be suitable for the metal that grinding anti-tensile is higher, as various general steel, malleable cast iron, hard bronze etc., also can manufacture high grade refractory.It is high that palm fibre corundum has purity, advantages of good crystallization, and mobility is strong, and linear expansion coefficient is low, corrosion resistant feature.Through fire-resistant manufacturing enterprise of tens of families practical proof, this product in application process, have do not detonate, not efflorescence, indehiscent feature.Especially it,, far above the cost performance of the brown corundum of tradition, more makes it to become best aggregate and the inserts of brown corundum based refractory materials.Palm fibre corundum principal component is aluminium oxide, and graduation is also just distinguished with aluminium content, and aluminium content is lower also lower with regard to hardness.Product granularity, by international standard and various countries' standard production, can be processed by user's requirement granularity.General grain size number is F4-F320, and its chemical analysis is looked granule size and difference.Outstanding feature is that crystalline size is little shock-resistant, and because of broken with autogenous tumbling mill processing, particle mostly is spherical particle, and surface dry is clean, is easy to bonding agent combination
Alumine fine powder: the fine powder of selecting burnt sintered bauxite ore to be processed into Raymond mill, granularity is generally 100 order-325 orders.Its constituent complex is the originate general name of oxidizing aqueous aluminum ore far from it of multiple geology.As boehmite, diaspore and gibbsite (Al
2o
33H
2o); Have plenty of diaspore and kaolinite (2SiO
2al
2o
32H
2o) form together; What have take kaolinite as main, and along with the increasing of kaolinite content, is configured to general bauxite or kaolinite matter clay.Bauxite is generally that chemical weathering or exogenous action form, and seldom has minal, always contains some impure minerals, more or less contains clay mineral, iron mineral, titanium mineral and chip heavy mineral etc.
Bentonite: (English name Bentonite); Have another name called: amargosite, the de-stone of class, popular name: white clay.Be to take the clay mineral that montmorillonite is main component, this soil has good caking property, dilatancy, adsorptivity, plasticity, dispersiveness, lubricity, cation exchange.With thering is great suspension after other alkali, the exchange of lithium base, after acidification, there is again good decolourising property etc.Therefore it can be made into various binding agent suspending agents, adsorbent, decolorizer, plasticizer, catalyst, cleanser, disinfectant, thickener, scale remover, washing agent, filler, reinforcing agent etc.Other chemical composition quite stable.
α-Al
2o
3: α-Al
2o
3micro mist is electro-corundum powder, and it is the crystalline solid that commercial alumina powder is heated and smelted and obtain through electric arc furnaces, and electric capacity corundum goods also carry out in reduction melting.Carbon is added in batching, make the major impurity in raw material be reduced into metal, can make like this impurity separated with the alumina not being reduced.Because CaO can not be reduced separation, all enter in solution, so its mineral composition is CaO-Al
2o
3-SiO
2three elements, in order to obtain the measured corundum of industrial matter, notes making the SiO in fused mass in batching and molten process processed
2content be about two times of CaO content, make it generate anorthite (CaS
2), and do not generate calcium hexaluminate (CA
6).Because generate CA
6time, the CaO of a molecule will consume the Al of six molecules
2o
3, and when generating anorthite, the CaO of a molecule only consumes the Al of a molecule
2o
3, two kinds of situations are compared and are generated CaS
2compared with CA
6favourable, can obtain more corundum.Obtain the electro-corundum of 85%-98%, its CaO content should be higher than 0.6%.TiO in bauxite
2impurity plays injurious effects to the quality of electro-corundum.While producing electro-corundum, in last crystallized product, because undue reduction tends to produce the mineral of some titaniferous, as: CrTiO
2, mTiO
2, TiC and TiN etc. or monomer titanium.They produce violent expansion and cause that frit cracks between 450-600 ℃.The main cause that causes expansion is that above-mentioned titaniferous ore oxidation generates rutile (TiO
2).When molten system finishes soon, add oxidant, (mill scale) makes the titanium and the compound oxidation thereof that have been reduced, can eliminate this expansion.
In frit crystallization process, due to α-Al
2o
3the proportion of crystallization is greater than the proportion of solution, purer corundum is sunken to the bottom of frit, impure liquation floats over top, and cause shrinkage cavity, in the contraction process of Lower Half, form the pore disperseing simultaneously, therefore, the frit obtaining due to corundum melt has crystalline texture feature inhomogeneous and layering, also has large and mixed and disorderly pore.
In addition, due to Al
2o
3liquation is in the time of 2200 ℃ and α-Al
2o
3proportion difference reach 25%, make pure corundum fused mass produce very large contraction.For this reason, add a small amount of Na2 in batching, CaO etc., make it generate β-Al
2o
3, because the proportion of β only has 3.3 only 10% easily to obtain whole frit with liquation proportion difference.But will reduce α-Al in frit simultaneously
2o
3content and the performance of anti-slag corrosion.So high-strength anti-strip wear-resistant ceramic is smeared the physical and chemical index of spray paint requirement corundum: bulk density: 3.5-3.98g/cm
3, Al
2o
3>=98.5, Na
2o
3≤ 0.5-0.7, magnetic allows content≤0.03, TiO
2≤ 1.5.
α-Al
2o
3be ingot, sieve as certain granules, ball milling becomes Ultramicro-powder, mechanical deironing, then add some additives, high-strength anti-strip wear-resistant ceramic is smeared in spray paint with α-Al
2o
3be the erosion because of its ability bronsted lowry acids and bases bronsted lowry, refractoriness is high, and load softening point is high, and chemical stability is good.
Silicon carbide micro-powder: refer to the micron order silicon carbide powder that utilizes JZFZ equipment to carry out ultra-fine grinding classification.Silicon carbide micro-powder is mainly 1200# and 1500# is main.The chemical stability of carborundum: SiC is better, at HclH
2sO
4with in HF, boil also and do not weather.With silicic acid, at high temperature there is not chemical reaction in SiC yet, thus there is the superperformance that opposing acid slag corrodes, but be all subject to the erosion of basic clinker.SiC and carbon start to be reacted to about 1000 ℃ reactions significantly in the time of 525 ℃.At this temperature, it reacts with mgo significantly, strongly carries out with reacting at 800 ℃ of cupric oxide.The appearance of obviously bursting apart as seen while being reacted to 1300 ℃ with iron oxide 1000 ℃-1200 ℃ time.With manganese oxide, from 1360 ℃, occur the phenomenon of bursting apart, SiC reacts with it since 600 ℃ in chlorine, during to 1200 ℃, can make it be decomposed into SiCl
4and CCl
4, molten caustic soda can make SiC decompose under red heat temperature, therefore can not resist borax, ice crystal, waterglass, the erosion of potash etc.The point molten metal of oxide-free corrodes SiC at 1000 ℃-1200 ℃, but zinc and plumbous exception, thus zinc distillation furnace and lead-smelting furnace best with SiC result of use with coating.
At more than 1000 ℃ SiC with the easy reaction decomposes of strong oxidizing property gas.With steam contact also easy reaction decomposes.In a word, the major defect of SiC is at high temperature oxidizable, and particle is thinner, more oxidizable.
Bulk density 2.7-3.1g/cm
3; SiC content>=93%; Fe
2o
3≤ 0.5%; SiO dissociates in Al≤0.1
2=0 free Si=0
Because SiC is difficult for fusing and decomposites the temperature of steam very high, and there is very high thermal conductivity and low thermal expansivity, thereby there is good resistance to heat shocks.In addition, the performance that SiC chemical resistance of concrete and acid slag corrode is very strong, is a kind of good mud raw material.
Sericite in powder: belong to monoclinic crystal, crystal is that flakey has thin,tough silk gloss (muscovite is glassy lustre), full of elasticity, wearability good.Stable chemical nature, is insoluble in acid-base solution, viscosity is high.Stemming sericite feature: 1. good, the easy-sintering of caking property, mica itself has similar kaolinic character, bonds.Sericite in low thermophase easy-sintering, and sintering velocity is fast, reaches very soon the intensity of demand, does not crack.2. sericite thermal coefficient of expansion is little, is subject to volume stability in thermal process.3. the consumption of sericite, according to the difference of building position by laying bricks or stones of rotary kiln, and determines addition, general 3%-10%.
Sericite physical and chemical index: SiO
2: 70-75; AL
2o
3: 13-17; Loss on ignition: 3-3.5; Granularity: 325 orders; Refractoriness: 1350-1450 ℃.
Mullite powder: mullite (or Mo Naishi) is that a series of mineral that are comprised of aluminosilicate are referred to as, and these class mineral are more rare.Mullite is the mineral that aluminosilicate at high temperature generates, and during Heat artificially aluminosilicate, can form mullite.Natural mullite crystal is elongated needle-like and is radiation bunch shape.Mullite ore deposit is used to produce high-temperature refractory.Mullite is the economical refractory material of latest domestic type, have high temperature resistant, intensity high thermal conductivity coefficient is little, the features such as energy-saving effect is remarkable, be applicable to the liner that oil splits Jie's stove, metallurgical hot-blast stove, ceramic roller kiln, tunnel cave, electroceramics shuttle kiln, removing appts. of glass crucible and various electric furnaces, can directly contact flame, through relevant technologies superintendent office, detect and use, product reaches the technical indicator of same kind of products at abroad.Mullite, sintering diamond spar brick, zircon brick, silicon carbide articles, each corundum-mullite is a kind of refractory raw material of high-quality, and mullite expands evenly, and thermal shock resistance is fabulous, and load softening point is high, and high-temerature creep value is little, and hardness is large, the characteristic that resistance to chemical corrosion is good.
Guangxi white clay: Guangxi white clay (Guangxi dimension sieve white clay ball clay) is a kind of soft kaolin, is that China finds top-quality soft flame-proof clay at present.Physical characteristic: plasticity is good, plastic index 28-57, good fluidity, associativity is high, the high AL of purity
2o
3>=34%FezO.< 1%, refractoriness >=1700 ℃.Can make senior fire-resistant bonding agent, stemming additive.Physical and chemical index: SiO
2-49.99%; AL
2o
3--34.72%; FeMO < 1.04%; CaO～0.3%; MgO--0.36%; TiO
2--2.05%; NazO-0.075%; K, O-0.152% igloss 12.61%; 1770 ℃ of refractoriness.
Aluminium dihydrogen phosphate: for high temperature kiln fire bond.With refractory aggregate, within after curing agent etc. mix constant temperature 4-24 hour between 90-110 ℃, form high-adhesive-strength at normal temperatures, after 350-500 ℃ of oven dry, just there is high resistance folding, resistance to compression, hydration resistance, even if soak or boil also and do not feel like jelly in water.
Sodium phosphate trimer: as washing product auxiliary agent, also can be used for oil, metallurgy, mining, papermaking, water treatment etc.The main auxiliary agent as synthetic detergent, for soap synergist with prevent that soap slab grease from separating out and frosting.Lubricated oil & fat is had to strong emulsification, can be used for regulating the pH value of buffering soap lye.The water softener of water for industrial use.Process hides---agent.Dyeing assistant.When preparation suspends in the industry such as paint, kaolin, magnesia, calcium carbonate, make dispersant.Drilling mud dispersant.Paper industry is as oil-stain-preventing agent.
Calgon: for dispersant and high temperature adhesives.
Laying fireproof bricks mud of the present invention, has good fillibility, contractibility and agglutinating property.Intensity is high, maintain conditions of blast furnace stable (the iron mouth degree of depth, go out to refine time fluctuation, the full blast rate of blocking up) thus make BF.Slag resistance is strong, resistance to erosion, resistance to erosion.Flawless while heating rapidly, bond strength is high.At high temperature have certain shrinkage, permeability is good, intensity is high, can not cause the generation that makes refractory brick fried head phenomenon due to the expansion in hot environment.
Accompanying drawing explanation
Shown in Fig. 1, be the partial view of energy-saving rotary kiln furnitures body structure of the present invention, the steel body kiln shell 1 in figure is interior in not building the state of highiy refractory brick 4 by laying bricks or stones;
Fig. 2 is that A shown in Fig. 1 is to view;
Fig. 3 is that front view and the part of energy-saving rotary kiln furnitures body structure of the present invention looked.
The specific embodiment
As shown in the figure, described energy-saving rotary kiln, in steel body kiln shell 1 cylindraceous, several highiy refractory brick steel moulds 3 and welding, steel mould pillar 2, highiy refractory brick 4, laying fireproof bricks mud 5 together forms; It is characterized in that: in the arc of the positive bottom of steel body kiln shell 1, be welded with and connect integrally-built highiy refractory brick steel mould 3, one side of highiy refractory brick steel mould 3 is welded with one end of steel mould pillar 2, and the other end of steel mould pillar 2 is welded on steel body kiln shell 1 inside; Between highiy refractory brick 4, be marked with laying fireproof bricks mud 5;
The height of highiy refractory brick steel mould 3 is 2/3rds of highiy refractory brick 4 height, the width of highiy refractory brick steel mould 3 is consistent with the width of highiy refractory brick 4, the consistency of thickness of laying fireproof bricks mud 5 between the thickness of highiy refractory brick steel mould 3 and highiy refractory brick 4;
Laying fireproof bricks mud 5 is comprised of the raw material of following weight portion: brown fused alumina micropowder---and 15 parts; Alumine fine powder---35 parts; Bentonite---20 parts; α-AL
2o
3---5 parts; Silicon carbide micro-powder---5 parts; Sericite---5 parts; Mullite powder---15 parts; Guangxi white clay---8 parts; Aluminium dihydrogen phosphate---4 parts; Sodium phosphate trimer---0.02 part; Calgon---0.15 part.
The preparation method of laying fireproof bricks mud: the raw material by above each component, mix by weight, fully stir, pack in airtight container, during use, add water and fully stir as muddy, directly use.Raw material: water=100: 22-26.
Adopt after such structure, between highiy refractory brick steel mould 3 and steel mould pillar 2, form firm triangular support structure.When this triangular support structure one side is built refractory brick by laying bricks or stones, according to GB < < Industrial Stoves, build standard > > by laying bricks or stones and carry out.The height of building by laying bricks or stones is when reaching the height that the personnel of building by laying bricks or stones can smooth construction, and workmen temporarily withdraws, and rotary kiln body not bricklaying surface goes to suitable construction location, continues building construction until completion.
This building method, has following some advantage: safety coefficient is high, stops the personnel casualty accidents that traditional masonry way occurs in work progress.Operating efficiency is high, and comparable traditional masonry way improves 10 times of above efficiency; Reduced workman's labour intensity; Saved the instrument of building by laying bricks or stones.The rotary kiln that adopts the method to build by laying bricks or stones, be 2-3 times of traditional building method the service life of its refractory liner.In a word: energy-saving rotary kiln furnitures of the present invention have that speed of application is fast, long service life, laying fireproof bricks stabilized structure good effect.
Claims (2)
1. an energy-saving rotary kiln, in steel body kiln shell cylindraceous (1), several highiy refractory brick steel moulds (3) and welding, steel mould pillar (2), highiy refractory brick (4), laying fireproof bricks mud (5) together forms; It is characterized in that: in the arc of the positive bottom of steel body kiln shell (1), be welded with and connect integrally-built highiy refractory brick steel mould (3), one side of highiy refractory brick steel mould (3) is welded with one end of steel mould pillar (2), and the other end of steel mould pillar (2) is welded on steel body kiln shell (1) inside;
Between highiy refractory brick (4), be marked with laying fireproof bricks mud (5);
The height of highiy refractory brick steel mould (3) is 2/3rds of highiy refractory brick (4) height, the width of highiy refractory brick steel mould (3) is consistent with the width of highiy refractory brick (4), the consistency of thickness of laying fireproof bricks mud (5) between the thickness of highiy refractory brick steel mould (3) and highiy refractory brick (4).
2. according to energy-saving rotary kiln claimed in claim 1, it is characterized in that: laying fireproof bricks mud (5) is comprised of the raw material of following weight portion: brown fused alumina micropowder---15 parts; Alumine fine powder---35 parts; Bentonite---20 parts; α-AL
2o
3---5 parts; Silicon carbide micro-powder---5 parts; Sericite---5 parts; Mullite powder---15 parts; Guangxi white clay---8 parts; Aluminium dihydrogen phosphate---4 parts; Sodium phosphate trimer---0.02 part; Calgon---0.15 part.
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| CN107010932A (en) * | 2017-05-09 | 2017-08-04 | 郑州耐都热陶瓷有限公司 | High temperature liner body skin patching material |
| CN107010972A (en) * | 2017-05-09 | 2017-08-04 | 郑州耐都热陶瓷有限公司 | High-temperature wearable mud |
| CN108530042A (en) * | 2018-06-08 | 2018-09-14 | 郑州凯翔耐火材料有限公司 | A kind of firing highly heatproof and shockproof bauxite brick and its production technology |
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Application publication date: 20140813 |