Limekiln uses fireproof data is a basis different kiln form, and use a circumstance actually to come make choice of is fireproof material liner. Limekiln is main by kiln body, go up the composition such as control equipment of grey device of makings device, cloth device, burner, discharge, electric equipment, appearance, dust collector. The limekiln of different form, its configuration and to calcine form are distinguished somewhat, technological process is basic and same, but equipment value has very big distinction. Using the effect of course also is discriminating for certain. Because lime is perpendicular kiln warm-up belt, firing the physics that the stock inside the temperature of belt, cooling zone and kiln produces between gentle style and chemistry are different, because this is different,kiln area place uses the requirement of material to also differ.
The kiln that produces active lime have: Rotary kiln, set upright kiln, usually, have and shed double chamber of type of accumulation of heat to set upright kiln, Shuang Liang to set upright kiln and annular sleeve to set upright kiln to wait.
Limekiln is main by kiln body, go up the composition such as control equipment of grey device of makings device, cloth device, burner, discharge, electric equipment, appearance, dust collector.
Limekiln has a lot of different classification methods. According to the appearance of kiln furnace cent is quadrate kiln, circle kiln to wait; It is kiln of limekiln, pottery and porcelain, cement kiln, glass kiln, tile kiln to wait according to the phyletic cent of goods; The feature that flows from blaze divides kiln of blaze of form of kiln of the blaze that it is a horizontal stroke, kiln rising blaze, kiln pouring blaze, horse's hoof to wait; Divide according to what using fuel sort wait to burn kiln of coalpit, fuel, gas kiln; Carry means to be able to be divided again according to stock wait for kiln car kiln, roller bottom kiln, ejector plate kiln. Geng Wei Tong Yong De Shi Gen Ju Bei Shao Zhi Pin De Wu Li Zhuang Tai 、 Jie He Sheng Chan Fang Shi Jin Xing Fen Lei .
The kiln of limekiln use generally in building materials industry, its predecessor has a lot of it is to be used at cement industry, the cement pit that fire grog uses, try to develop our country to had had a variety of suiting through introducing a lot of abroad technologies in last few years the advanced kiln that lime produces.
1, divide by fuel: Have mix kiln (burn solid fuel namely, coke, anxious pink, coal) amiable kiln.
2, burn blast furnace gas, Jiao Lu tail gas of gas, calcium carbide, produce heat gas, natural gas) .
3, cent of the form that press kiln: Kiln of kiln having vertical stroke, rotary kiln, sleeve, double chamber kiln, double bridge kiln.
4, by the operation pressure divides: Have pressing operation kiln and kiln of negative pressure operation.
Limekiln is basic structure and equipment
Warm-up paragraph in front it is warm-up machine, enter warm-up paragraph temperature is 1000~1050 ℃ , basically be intensity to the requirement of material tall, wearability the heatproof shake sex with have good, certain, this phase uses compact clay brick or brick of advanced course clay commonly, when build by laying bricks or stones is built general need not permanent layer
Limekiln structure is simple, manufacturing process control is convenient and reliable, fragile little, movement leads the part tall, the structure is advanced, the perpendicular type intake air heater of low-pressure caustic can improve warm-up result effectively, the limestone after classics warm-up is entered very limekiln is decomposed rate can amount to 20-25% , can use limestone of 10-15mm granule class directly; Reliable limekiln two end combined-type scale is sealed. It is the equipment of cement of high grade of cement plant to calcine, use extensively also at the industry such as metallurgy, chemical industry, building at the same time.
Iron and steel industry, calcium carbide industry, alumina industry, the industry such as fireproof material is lime uses up large family, nearly two years these a few industries are the trade that high speed expands. Annual yield is basic it is the speed growth with 20% above. Limestone bases is calcium carbonate, and lime composition basically is oxidation calcium. The fundamental of fire lime is high temperature of have the aid of, decompose the calcium carbonate in limestone into the calx of oxidation calcium and carbon dioxide.
The temperature of excessive belt is 1200~1300 ℃ , it is limestone to firing take the transition that move level, change of this phase temperature is bigger, partial limestone already began reaction, ask the thermal shock stability of this phase material and data strength are close friends, choose brick of 3 class tall aluminium commonly. In the meantime, distributing to be mixed equably to make expect in this phase be heated is even, when build by laying bricks or stones is built material is chosen pledge with material prefab piece also but, can not have permanent layer.
Limekiln basically sets stock feed machanism accessorily, cloth glassware, offer wind device, burner, discharge grey device, relative to character, mix scoriaceous ash kiln material is very crucial, must load fuel and limestone at the same time because of it inside kiln, through cloth implementation charging is in inside kiln reasonable distributing, remove furnace wall effect, force of balanced furnace internal resistance, do one's best is whole furnace is sectional ” of “ get angry agrees equably.
The main and accessory equipment of gas kiln is burner, because its aeriform fuel is to pass burner can light gas and place to need oxygen (air) inside burner by certain proportion mixture evacuation enters the flaming inside furnace, and the empty tolerance that different place burning gas requires is different also. Different furnace, heat differently means, the blaze kind that it needs is not same also, if mix type beforehand, mix type partly, outside mix type and oxidizing flame, neuter blaze, reductive blaze to wait a moment. The burner that says gas kiln so is deciding the to calcine effect of limekiln on certain level.
Tall temperate zone is proximate and firing belt, ℃ of use temperature 1300~1400, temperature change is frequent, material of this paragraphs of requirement has taller loading bate to begin a drop, the heatproof shake sex with higher volume better stability. Choose commonly special tall aluminous brick and fireclay cooperate immediate step to build, without permanent layer. Material of this paragraph of delegate is brick of one class tall aluminium.
Of course other is accessary equipment is very important also, be like jellaba, see resemblance very simple, but the result that should make sure it offers the wind force inside kiln to had had in the distributinging ability on whole kiln section.
Limekiln fundamental and hot project technology
Firing the final reaction phase that taking is lime, this Duan Cai is added with a big burner lukewarm, because the active demand of lime is higher, its are firing temperature is higher. This paragraph uses permanent thermal insulation, ask heat-insulating material wants to have the strength that comparative, prevent pulverization be wearinged away by working layer. Choose fancy tall aluminous brick, phosphate carries on his shoulder or back compound brick, high soft brick or magnesian qualitative brick but, a lot of manufacturer is a basis actual make choice of.
Eligible limestone is deposited inside makings storehouse, classics promotion machine promotes and carry enters storehouse of makings of coping of intake air heater. Storehouse of makings of coping of intake air heater, by fluctuation 2 are expected plan quantity of control feed in raw material, expect through falling the canal distributings limestone equably next intake air heater each each are indoor. Main facility includes system of to calcine of rotary kiln of energy-saving environmental protection active lime the equipment such as dust catcher of type of bag of condenser of chute of perpendicular type intake air heater, have a change of luck, rotary kiln, burner, perpendicular type, pulse, operation of equipment of system of a complete set of is reliable, automation degree and labor productivity are tall, product quality is good.
Cooling zone is very short, have brick of a few annulus only or pouring makings, temperature is 1300~1400 ℃ , use wet step of brick of 2 class tall aluminium or brick of 3 class tall aluminium and fireclay of form a complete set commonly.
The fuel of scoriaceous ash is very extensive, solid fuel, gas fuel, liquid fuel is OK, but the combustion principle of new technology limekiln is: Which kinds of fuel most economy, which kinds of fuel more be helpful for environmental protection, what fuel more the key that can managing the sources of energy is new technology limekiln. Limestone bases is calcium carbonate, and lime composition basically is oxidation calcium. The fundamental of fire lime is high temperature of have the aid of, decompose the calcium carbonate in limestone into oxidation calcium and carbon dioxide.
Lime rotary kiln uses adiabatic insulation material
In a lot of production industries such as building materials, metallurgy, chemical industry, environmental protection, use unit of rotary kiln equipment to undertake mechanical, physics or chemical processing to the stock such as solid, pulverous, gas widely, unit of this kind of equipment is called rotary kiln, rotary kiln divides the cylindrical shell that it is kiln to lie commonly buy, can make what circumgyrate moves call rotary kiln, also weigh kiln coming back. Cylindrical shell of another kind of kiln is to establish what buy does not turn to call establish kiln.
Rotary kiln is main equipment is kiln carapace, kiln carapace it is rotary kiln (kiln coming back) main body, thickness of kiln carapace plate is controlled in 40mm, the temperature in kiln carapace should achieve 1000 Celsius left and right sides, of high temperature should achieve 1600 ℃ , so the heat preservation of kiln carapace prevents be lost of quantity of heat to become the key of rotary kiln.
Cooling machine the cooling equipment that this equipment is finished product lime, undertake cooling with air-blower, the lime temperature that the demand has cooled under 100 ℃ . The lime that has cooled enters makings storehouse through leather belt. The hot air temperature after hot exchange is 600 ℃ to control, as support combustion wind is entered rotary kiln and gas mixture combustion. This paragraph uses argillaceous brick to use construction of fireclay wet build by laying bricks or stones.
Conventional kiln case for better heat preservation, the firebrick that in-house build by laying bricks or stones has a 200mm to control or it is carborundum brick, such kiln carapace weight is compared big, kiln carapace is in when running, because high temperature reachs bearinged relation, kiln carapace can have Tuo garden model be out of shape, can be opposite so kiln brick generates pressure, influence kiln brick the life of insulation material.
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