CN110156356A - A kind of production line and its technique preparing high alumina cement using white clay - Google Patents

A kind of production line and its technique preparing high alumina cement using white clay Download PDF

Info

Publication number
CN110156356A
CN110156356A CN201910243867.2A CN201910243867A CN110156356A CN 110156356 A CN110156356 A CN 110156356A CN 201910243867 A CN201910243867 A CN 201910243867A CN 110156356 A CN110156356 A CN 110156356A
Authority
CN
China
Prior art keywords
alumina cement
high alumina
heat
white clay
clay
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910243867.2A
Other languages
Chinese (zh)
Inventor
李生钉
彭其雨
李振佑
李振秋
魏四成
林宝
肖静
郑发基
林金花
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujian Dingsheng Environmental Protection Technology Co Ltd
Original Assignee
Fujian Dingsheng Environmental Protection Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujian Dingsheng Environmental Protection Technology Co Ltd filed Critical Fujian Dingsheng Environmental Protection Technology Co Ltd
Priority to CN201910243867.2A priority Critical patent/CN110156356A/en
Publication of CN110156356A publication Critical patent/CN110156356A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01FCOMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00Compounds of aluminium
    • C01F7/48Halides, with or without other cations besides aluminium
    • C01F7/56Chlorides
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00Hydraulic cements
    • C04B7/24Cements from oil shales, residues or waste other than slag
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00Hydraulic cements
    • C04B7/32Aluminous cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00Hydraulic cements
    • C04B7/36Manufacture of hydraulic cements in general
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00Hydraulic cements
    • C04B7/36Manufacture of hydraulic cements in general
    • C04B7/364Avoiding environmental pollution during cement-manufacturing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/001Drying-air generating units, e.g. movable, independent of drying enclosure
    • F26B21/002Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004Systems for reclaiming waste heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/008Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/10Production of cement, e.g. improving or optimising the production methods; Cement grinding
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

A kind of production line and its technique preparing high alumina cement using white clay, including feeder apparatus, drying equipment, calciner, heat collection equipment, cleaner, coal supply apparatus, combustion apparatus, milling equipment.The present invention can not only have elimination white clay, effectively the local graceful natural ecology living environment of protection by clay-slag/carbide slag, aluminium ash/aluminum raw material, nucleus element three mixed calcining high alumina cement is made;The advantages that quickening utilization of the recycling of renewable resources, turns waste into wealth, turns harm into good, and pollution administration improves environment, releases occupied land resource, and the heat generated in production process can sufficiently be recycled, and improve working efficiency.

Description

A kind of production line and its technique preparing high alumina cement using white clay
Technical field
The present invention relates to recovery and reuse of waste fields, refer in particular to a kind of production line that high alumina cement is prepared using white clay And its technique.
Background technique
There are two types of white clay sources, first is that during soda manufacture, with can generate a large amount of waste liquid, waste liquid in ammonia-soda process alkaline The alkaline residue generated after filters pressing is commonly called as white clay.Black liquor is generated in another paper-making pulping production process to handle through alkali recovery technology Afterwards, lime is added in green liquor and carries out causticizing reaction, obtain the sediment of white, as white clay.Paper white sludge reaction is as follows:
Na2CO3+ CaO+ H2O =2NaOH+ CaCO3
Its Main chemical component are as follows:
Project CaO MgO Fe2O3 Al2O3 SiO2 Burn vector
Ratio (%) 44.4-51.9 0.55-1.75 0.17-1.2 0.46-1.4 3.38-11 31.49-43
Generate 6,000,000 tons or more white clays every year according to national statistics, many white clays are stacked naturally or filled, certainly will increase in air Dust content, or cause soil and groundwater environmental pollution.Therefore, the processing problem of white clay restricts always soda industry and system Slurry papermaking further develops, a great problem for needing us to be dedicated to capturing.
The applicant once prepared calcium aluminate in a kind of utilization white clay of one Chinese invention patent of submission on May 28th, 2018 The production line and its technique of powder, it discloses by ratio of weight and the number of copies by 0.4~0.5 part of clay-slag/carbide slag, 0.9~1.1 part Aluminum raw material, 0.04~0.05 part of nucleus element be sequentially transmitted in blender be mixed and stirred for uniformly;It will mix later It closes object and is sent to 20~40min of calcining in rotary kiln, until the temperature of mixture reaches 900~1100 DEG C;After having calcined, by this Mixture is cooled to 300~400 DEG C by cooler;After having cooled down, which is subjected to grinding, system by the first ball mill Obtain calcium aluminate powder.The invention can eliminate white clay, and effectively the local graceful natural ecology living environment of protection, accelerates production-goods again Source recycles, and turns waste into wealth, turns harm into good, and pollution administration improves environment, releases occupied land resource, Er Qieke Think the ecological environment that people create Amenities, promote harmony between man and nature unified.
But the invention there are a defect, i.e., the mixture obtained after blender stirring, which is not dried, is just sent into revolution It is calcined in kiln, this just results in the mixture and is only capable of being cooled to 300~400 DEG C, and working efficiency is lower, and is unfavorable for the later period The recycling of heat can not completely realize the energy-saving and environment-friendly original intention of the applicant.
Summary of the invention
The present invention provides a kind of production line and its technique that high alumina cement is prepared using white clay, and main purpose is to overcome The existing technical efficiency for preparing high alumina cement using white clay is lower and the defect that is not energy-saving and environment-friendly.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
A kind of technique preparing high alumina cement using white clay, comprising the following steps:
1) by ratio of weight and the number of copies by 0.30~0.50 part of clay-slag/carbide slag, 0.50~1.10 part of aluminium ash/aluminum raw material, 0.03~0.06 part of nucleus element, which is sequentially transmitted in blender, be mixed and stirred for uniformly;
2) it is delivered to molding machine after having stirred and carries out granulation balling-up, then raw material ball after molding feeding dryer is dried, Siccative ball of the final moisture content less than 2% is obtained after drying;
3) siccative ball is sent into calcined by rotary kiln, calcines 25~45min, until the temperature of mixture reaches 1300~1500 DEG C;
4) after having calcined, which is cooled to 50 DEG C or less by cooler;
5) heat collected when being cooled down the cooler is delivered to dryer as drying heat source;
6) after the siccative ball in step 4 has cooled down, which is subjected to grinding by the first ball mill, high alumina cement is made.
Further, the tail gas generated in the calcination process in rotary kiln is exchanged heat to clean sky by heat exchanger Gas, the clean air resupply the dryer.
Further, remaining after the cooler is collected heat and the clean air supply dryer Waste heat is delivered in aluminium polychloride liquid again aluminium polychloride solid is made.
Further, after the tail gas is exchanged heat by heat exchanger, desulfurization process is first carried out to the tail gas using wet desulphurization, Oxygen-rich combustion method and SNCR method are successively used later, by the NO in tail gasXIt is reduced into N2And water.
Further, in step 3, the method for the calcined by rotary kiln are as follows: coal cinder crushed by coal mill after through by The screening of powder concentrator, then be sent in four-way coal burner and burnt by Pneumatic conveying pump, it is generated after burning Hot wind is delivered in the rotary kiln and calcines to the siccative ball in it.
A kind of production line preparing high alumina cement using white clay, including
Feeder apparatus: it includes for accommodating clay-slag/carbide slag clay-slag feed bin, for accommodating aluminium ash/aluminum raw material It is aluminum raw material feed bin, the nucleus element feed bin for accommodating nucleus element, broken for carrying out medium size to bauxite or aluminium ash Jaw crusher, for carrying out the broken fine crusher of thin formula, for by thin formula to the broken bauxite of medium size or aluminium ash Broken bauxite or aluminium ash are ground into the second ball mill of aluminum raw material, for mixing the clay-slag/carbide slag, aluminium Ash/aluminum raw material, nucleus element and the blender stirred, connect the molding machine and dry the molding machine for connecting the blender outlet The belt conveyor of dry equipment;
Drying equipment: it includes the dryer for the molding raw material ball of the molding machine to be dried into siccative ball;
Calciner: it includes the rotary kiln that the siccative ball for coming to drying equipment conveying is calcined;
Heat collection equipment: it includes for carrying out cooling cooler, for inciting somebody to action to the siccative ball of process calciner calcining The heat that the cooler is collected when cooling is delivered to the heat transmission pipeline of dryer;
Cleaner: it includes tail gas adsorption tower, cyclone dust collectors, pulse dust collector, oxygen-enriched combustion boiler, SNCR boiler;
Coal supply apparatus: it includes the coal mill for being crushed to coal cinder, the powder concentrator for screening coal dust, for transmitting coal The screw conveyor of powder, the coal dust feed bin for connecting the screw conveyor output end, for the coal dust in coal dust feed bin to be sent to Pneumatic conveying pump in combustion apparatus;
Combustion apparatus: it includes the four-way coal burner for connecting the pneumatic conveying pump output terminal, by the four-way coal dust The hot wind that burner generates is transmitted to the roots blower in the rotary kiln;
Milling equipment: it includes for crushing cooler siccative ball after cooling so that the first ball milling of high alumina cement is made Machine, the high alumina cement feed bin for accommodating the high alumina cement.
Further, the heat collection equipment further includes that the tail gas for generating the calciner is sent to dedusting The tail gas transmission pipeline of equipment carries out cooling heat exchanger to the tail gas in tail gas transmission pipeline, is used for the heat exchanger The hot gas of generation is delivered to the hot gas transmission pipeline of dryer.
Further, the rotary kiln is cascading type rotary kiln.
Further, the dryer is vibration ebullated bed dryer.
Further, the blender is vertical turbulent blender.
Compared to the prior art, the beneficial effect that the present invention generates is:
The present invention can by clay-slag/carbide slag, aluminium ash/aluminum raw material, nucleus element three mixed calcining be made high alumina cement, It not only has elimination white clay, effectively the local graceful natural ecology living environment of protection;Accelerate utilization of the recycling of renewable resources, Turn waste into wealth, turn harm into good, pollution administration improves environment, the advantages that releasing occupied land resource, and can be by life The heat generated during producing is sufficiently recycled, and improves working efficiency.
Detailed description of the invention
Fig. 1 is structural block diagram of the invention.
Fig. 2 is flow diagram of the invention.
Specific embodiment
Illustrate a specific embodiment of the invention with reference to the accompanying drawings.
Referring to Fig.1, Fig. 2.A kind of production line preparing high alumina cement using white clay, including feeder apparatus 1, drying equipment 2, Calciner 3, heat collection equipment 4, cleaner 5, coal supply apparatus 6, combustion apparatus 7, milling equipment 8.Wherein,
Feeder apparatus 1 includes for accommodating clay-slag/carbide slag clay-slag feed bin 11, for accommodating aluminium ash/aluminum raw material Aluminum raw material feed bin 12, the nucleus element feed bin 13 for accommodating nucleus element are broken for carrying out medium size to bauxite or aluminium ash Broken jaw crusher 14, for carrying out the broken fine crusher 15 of thin formula to the broken bauxite of medium size or aluminium ash, using In the broken bauxite of thin formula or aluminium ash are ground into the second ball mill 16 of aluminum raw material, be used to mix the clay-slag/ Carbide slag, aluminium ash/aluminum raw material, nucleus element and stir blender 17, connection blender outlet molding machine 18, connect this at The belt conveyor 19 of type machine 18 and drying equipment 2;In addition, the size according to clay-slag/carbide slag raw material and nucleus element raw material, Also optionally clay-slag/carbide slag biggish to the volume and nucleus element successively carry out jaw crusher, fine crusher, second The three-stage of ball mill is broken;The blender 17 is vertical turbulent blender.
Drying equipment 2 includes the dryer 21 for the molding raw material ball of molding machine 18 to be dried into siccative ball;Molding machine 18 mixture for coming to blender conveying carries out granulation balling-up.
Calciner 3 includes the rotary kiln 31 that the siccative ball for bringing to drying equipment defeated 2 is calcined;
Heat collection equipment 4 includes for carrying out cooling cooler 41, for inciting somebody to action to the siccative ball of process calciner calcining The heat that the cooler 41 is collected when cooling is delivered to the heat transmission pipeline 42 of dryer 21, for generate calciner Tail gas is sent to the tail gas transmission pipeline 43 of cleaner, carries out cooling heat exchanger to the tail gas in tail gas transmission pipeline 44, the hot gas for generating the heat exchanger is delivered to the hot gas transmission pipeline 45 of dryer.
Cleaner 5 include tail gas adsorption tower 51, cyclone dust collectors 52, pulse dust collector 53, oxygen-enriched combustion boiler 54, SNCR boiler 55;The tail gas adsorption tower 51 can be the spray column for adding lye;It is specifically used are as follows: the tail gas warp that rotary kiln 31 generates It crosses tail gas adsorption tower 51 and gets rid of vulcanized sodium therein, then successively get rid of tail by cyclone dust collectors 52, pulse dust collector 53 Dust in gas enters oxygen-enriched combustion boiler 54 later and carries out oxygen-enriched combusting, finally enters SNCR boiler 55 and carry out reduction reaction, Ammonium hydroxide or urea are added i.e. in SNCR boiler 55 as reducing agent, by the NO in tail gasXIt is reduced into N2And water.
Coal supply apparatus 6 includes the coal mill 61 for being crushed to coal cinder, the powder concentrator 62 for screening coal dust, is used for The screw conveyor 63 for transmitting coal dust, is used for coal dust feed bin 64 the coal dust feed bin 64 for connecting 63 output end of screw conveyor In coal dust be sent to the Pneumatic conveying pump 65 in combustion apparatus 7;It is specifically used are as follows: coal cinder is transmitted to coal by bobbing machine material machine It is crushed in grinding machine 61, powder concentrator 62 is sent to after crushing and is screened, passes through spiral again by dust removal process after having screened Conveyer 63 is sent to coal dust feed bin 64 and stores for future use, and the coal dust in coal dust feed bin 64 passes through Pneumatic conveying pump 65 again and transmits later To combustion apparatus 7.
Combustion apparatus 7 includes the four-way coal burner 71 of connection 65 output end of Pneumatic conveying pump, by the four-way coal The hot wind that powder burner 71 generates is transmitted to the roots blower 72 in rotary kiln 31;
Milling equipment 8 include for crush the siccative ball after cooling of cooler 41 be made high alumina cement the first ball mill 81, For accommodating the high alumina cement feed bin 82 of the high alumina cement.
Referring to Figures 1 and 2.Specifically, above-mentioned rotary kiln 31 is cascading type rotary kiln.Using only inside cascading type rotary kiln Special inner lining structure, can greatly improve the heat exchanger effectiveness of kiln, and material can be made abundant when " overturning " moves in kiln Flame is contacted, firing energy consumption is reduced;Meanwhile pellet can become more closely knit in mutual squeeze, and increase homogenizing for pellet Horizontal and intensity;The high-performance refractory thermal insulation material of customization also greatly reduces kliner coating heat dissipation bring energy loss;In waterfall Uniformly distributed multiple groups wireless temperature measuring device on formula rotary kiln is fallen, each area's temperature can be flexibly controlled, be equipped with Flame supervision and control system, it can be according to kiln Interior temperature requirements automatically control flame size and mend air quantity, keep burning more abundant, reduce while reducing fuel usage amount The generation of nitrogen oxides has changed simultaneously the natural mode that tradition manually sees fire.
The cascading type rotary kiln of same production capacity specification, compared to traditional rotary kiln, length is only its one third;Object in kiln Expect that fill factor is 18%, is twice of traditional rotary kiln fill factor (9-14%).
Rotary kiln uses oxygen-enriched burning process, can accelerate burning velocity, promotes burning completely, and then increase heat utilization Rate reduces coefficient of excess air.It proves that 20% sintering time of clinker ball can be reduced using oxygen-enriched combustion technology by test, improves Its yield and the smoke growing amount for saving 20% fuel and reduction by 30%.In sintering process, NO can be effectively preventedXGeneration, save Fume treatment cost, synthesis energy saving effect are considerable.The above multiple performance advantage superposition, so that the energy of cascading type rotary kiln Consumption is only the 1/2 of traditional rotary kiln.In addition, have benefited from the length advantage of cascading type rotary kiln, production-line technique flexible layout, by The limitation of soil, workshop etc. is small, can greatly save land occupation and construction investment.
Referring to Figures 1 and 2.Dryer 21 is vibration ebullated bed dryer.Ebullated bed dryer is vibrated to dry compared to tradition Dry equipment, under the premise of guaranteeing pellet dries quantity, main advantage is that drying rate is fast, heat transference efficiency is high.The drying is set The standby drying period is averagely only 3 minutes, and for 2 hours drying periods of conventional belt dryer, efficiency is greatly promoted;It should Equipment heat source comes from production line waste heat, and without separately setting heat source, heat transfer coefficient may be up to 95%.
Referring to Figures 1 and 2.Above-mentioned clay-slag feed bin 11, aluminum raw material feed bin 12, nucleus element feed bin 13, coal dust feed bin 44 It is all made of closed round library, to reduce dust pollution.
Referring to Fig.1, Fig. 2.A kind of technique preparing high alumina cement using white clay, comprising the following steps:
1) by ratio of weight and the number of copies by 0.30~0.50 part of clay-slag/carbide slag, 0.50~1.10 part of aluminium ash/aluminum raw material, 0.03~0.06 part of nucleus element, which is sequentially transmitted in blender 17, be mixed and stirred for uniformly;
2) it is delivered to molding machine 18 after having stirred and carries out granulation balling-up, then raw material ball after molding feeding dryer 21 is dried It is dry, siccative ball of the final moisture content less than 2% is obtained after drying;
3) siccative ball feeding rotary kiln 31 is calcined, calcines 25~45min, until the temperature of mixture reaches 1300~1500 ℃;
4) after having calcined, which is cooled to 50 DEG C or less by cooler 41;
5) heat collected when being cooled down cooler 41 is delivered to dryer 21 as drying heat source;
6) after the siccative ball in step 4 has cooled down, which is subjected to grinding by the first ball mill 81, high aluminum water is made Mud.
Referring to Figures 1 and 2.The tail gas generated in 31 calcination process of rotary kiln is exchanged heat to clean by heat exchanger 43 Air, clean air, which absorbs, to be become hot gas after heat and resupplies dryer 21.Also, the heat that cooler 41 is collected It is delivered in aluminium polychloride liquid again with remaining waste heat after hot gas supply dryer 21 and carries out water mist drying to be made poly- Aluminum chloride solids are closed, to realize making full use of for heat.After tail gas is exchanged heat by heat exchanger 43, first using wet desulphurization to this Tail gas carries out desulfurization process, oxygen-rich combustion method and SNCR method is successively used later, by the NO in tail gasXIt is reduced into N2And water.Separately Outside, the links such as workshop heating are applied also for thermal energy extra after dryer 21.
In step 3, the method for the calcining of rotary kiln 31 are as follows: coal cinder passes through after being crushed by coal mill 61 by powder concentrator 62 Screening, then be sent in four-way coal burner 71 and burnt by Pneumatic conveying pump 65, the hot wind generated after burning It is delivered in rotary kiln 31 and the siccative ball in it is calcined.
Aluminum raw material the preparation method comprises the following steps: take the bauxite or aluminium ash of 55% or more alchlor content, it is broken to first pass through jaw It is broken that broken machine 14 carries out medium size, then carries out thin formula by fine crusher 15 and be crushed, and carries out powder finally by the second ball mill 16 It is broken, the aluminum raw material is made.
Carbide slag be calcium carbide hydrolysis obtain acetylene gas after with calcium hydroxide waste residue as main component.1t calcium carbide adds water can More than 300 kg acetylene gas are generated, while generating the industrial wastes of 10t solid content about 12%, are commonly called as carbide slag slurries.Efficiently use calcium carbide Waste residue can not only bring good economic benefit, environmental benefit and social benefit, and be able to achieve and turn waste into wealth, but at present Recoverying and utilizing method be not possible to complete to make full use of it, and in the art, carbide slag can quilt as clay-slag It is fully used in and prepares high alumina cement.
The present invention can be by clay-slag/carbide slag, aluminium ash/aluminum raw material, nucleus element three mixed calcining high alumina is made Cement not only has elimination white clay, effectively the local graceful natural ecology living environment of protection;Accelerate recycling of recyclable waste The advantages that utilization, turns waste into wealth, turn harm into good, and pollution administration improves environment, releases occupied land resource, Er Qieneng It is enough sufficiently to recycle the heat generated in production process, working efficiency is improved, production line operation personnel depaly only needs 6-11 People, can also greatly reduce labor intensity, simultaneously at a possibility that not only can utmostly avoiding accident and artificial incorrect operation Attrition's demand.
The above is only a specific embodiment of the present invention, but the design concept of the present invention is not limited to this, all to utilize this Design makes a non-material change to the present invention, and should all belong to behavior that violates the scope of protection of the present invention.

Claims (10)

1. a kind of technique for preparing high alumina cement using white clay, it is characterised in that: the following steps are included:
1) by ratio of weight and the number of copies by 0.30~0.50 part of clay-slag/carbide slag, 0.50~1.10 part of aluminium ash/aluminum raw material, 0.03~0.06 part of nucleus element, which is sequentially transmitted in blender, be mixed and stirred for uniformly;
2) it is delivered to molding machine after having stirred and carries out granulation balling-up, then raw material ball after molding feeding dryer is dried, Siccative ball of the final moisture content less than 2% is obtained after drying;
3) siccative ball is sent into calcined by rotary kiln, calcines 25~45min, until the temperature of mixture reaches 1300~1500 DEG C;
4) after having calcined, which is cooled to 50 DEG C or less by cooler;
5) heat collected when being cooled down the cooler is delivered to dryer as drying heat source;
6) after the siccative ball in step 4 has cooled down, which is subjected to grinding by the first ball mill, high alumina cement is made.
2. a kind of technique for preparing high alumina cement using white clay as described in claim 1, it is characterised in that: the calcined by rotary kiln The tail gas generated in the process is exchanged heat to clean air by heat exchanger, and the clean air resupplies the drying Machine.
3. a kind of technique for preparing high alumina cement using white clay as claimed in claim 2, it is characterised in that: the cooler is collected Heat and the clean air supply remaining waste heat after the dryer be delivered in aluminium polychloride liquid again with Aluminium polychloride solid is made.
4. a kind of technique for preparing high alumina cement using white clay as claimed in claim 2, it is characterised in that: the tail gas is by changing After hot device heat exchange, desulfurization process is first carried out to the tail gas using wet desulphurization, successively uses oxygen-rich combustion method and SNCR method later, By the NO in tail gasXIt is reduced into N2And water.
5. a kind of technique for preparing high alumina cement using white clay as described in claim 1, it is characterised in that: in step 3, described time The method of rotary kiln calcining are as follows: coal cinder passes after being crushed by coal mill through the screening by powder concentrator, then by Pneumatic conveying pump It send to burning in four-way coal burner, the hot wind generated after burning is delivered in the rotary kiln to dry in it Pellet is calcined.
6. a kind of production line for preparing high alumina cement using white clay, it is characterised in that: including
Feeder apparatus: it includes for accommodating clay-slag/carbide slag clay-slag feed bin, for accommodating aluminium ash/aluminum raw material It is aluminum raw material feed bin, the nucleus element feed bin for accommodating nucleus element, broken for carrying out medium size to bauxite or aluminium ash Jaw crusher, for carrying out the broken fine crusher of thin formula, for by thin formula to the broken bauxite of medium size or aluminium ash Broken bauxite or aluminium ash are ground into the second ball mill of aluminum raw material, for mixing the clay-slag/carbide slag, aluminium Ash/aluminum raw material, nucleus element and the blender stirred, connect the molding machine and dry the molding machine for connecting the blender outlet The belt conveyor of dry equipment;
Drying equipment: it includes the dryer for the molding raw material ball of the molding machine to be dried into siccative ball;
Calciner: it includes the rotary kiln that the siccative ball for coming to drying equipment conveying is calcined;
Heat collection equipment: it includes for carrying out cooling cooler, for inciting somebody to action to the siccative ball of process calciner calcining The heat that the cooler is collected when cooling is delivered to the heat transmission pipeline of dryer;
Cleaner: it includes tail gas adsorption tower, cyclone dust collectors, pulse dust collector, oxygen-enriched combustion boiler, SNCR boiler;
Coal supply apparatus: it includes the coal mill for being crushed to coal cinder, the powder concentrator for screening coal dust, for transmitting coal The screw conveyor of powder, the coal dust feed bin for connecting the screw conveyor output end, for the coal dust in coal dust feed bin to be sent to Pneumatic conveying pump in combustion apparatus;
Combustion apparatus: it includes the four-way coal burner for connecting the pneumatic conveying pump output terminal, by the four-way coal dust The hot wind that burner generates is transmitted to the roots blower in the rotary kiln;
Milling equipment: it includes for crushing cooler siccative ball after cooling so that the first ball milling of high alumina cement is made Machine, the high alumina cement feed bin for accommodating the high alumina cement.
7. a kind of production line for preparing high alumina cement using white clay as claimed in claim 6, it is characterised in that: the heat collection Equipment further includes that the tail gas for generating the calciner is sent to the tail gas transmission pipeline of cleaner, transmits to tail gas Tail gas in pipeline carries out cooling heat exchanger, the hot gas for generating the heat exchanger be delivered to dryer hot gas pass Defeated pipeline.
8. a kind of production line for preparing high alumina cement using white clay as claimed in claim 6, it is characterised in that: the rotary kiln is Cascading type rotary kiln.
9. a kind of production line for preparing high alumina cement using white clay as claimed in claim 6, it is characterised in that: the dryer is Vibrate ebullated bed dryer.
10. a kind of production line for preparing high alumina cement using white clay as claimed in claim 6, it is characterised in that: the blender For vertical turbulent blender.
CN201910243867.2A 2019-03-28 2019-03-28 A kind of production line and its technique preparing high alumina cement using white clay Pending CN110156356A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910243867.2A CN110156356A (en) 2019-03-28 2019-03-28 A kind of production line and its technique preparing high alumina cement using white clay

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910243867.2A CN110156356A (en) 2019-03-28 2019-03-28 A kind of production line and its technique preparing high alumina cement using white clay

Publications (1)

Publication Number Publication Date
CN110156356A true CN110156356A (en) 2019-08-23

Family

ID=67638980

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910243867.2A Pending CN110156356A (en) 2019-03-28 2019-03-28 A kind of production line and its technique preparing high alumina cement using white clay

Country Status (1)

Country Link
CN (1) CN110156356A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110980785A (en) * 2019-11-19 2020-04-10 中国铝业股份有限公司 Sintering method of alumina clinker
CN112159126A (en) * 2020-09-29 2021-01-01 宁波益能机械科技有限公司 Portland cement preparation process
CN114920474A (en) * 2022-04-21 2022-08-19 山东大学 Method for preparing new mineral system high-temperature cement by using aluminum ash and carbide slag

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1830866A (en) * 2006-03-17 2006-09-13 宜宾天原股份有限公司 Cement clinker calcinated on vertical kiln using full calcium carbide slag to instead limestone and its preparation method
JP2008303087A (en) * 2007-06-05 2008-12-18 Denki Kagaku Kogyo Kk Method of manufacturing alumina cement, and monolithic refractory
CN108585009A (en) * 2018-05-28 2018-09-28 福建鼎盛元环保科技有限公司 A kind of production line and its technique preparing calcium aluminate powder using white clay
CN209872794U (en) * 2019-03-28 2019-12-31 福建鼎盛元环保科技有限公司 Production line for preparing high-alumina cement by using white mud

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1830866A (en) * 2006-03-17 2006-09-13 宜宾天原股份有限公司 Cement clinker calcinated on vertical kiln using full calcium carbide slag to instead limestone and its preparation method
JP2008303087A (en) * 2007-06-05 2008-12-18 Denki Kagaku Kogyo Kk Method of manufacturing alumina cement, and monolithic refractory
CN108585009A (en) * 2018-05-28 2018-09-28 福建鼎盛元环保科技有限公司 A kind of production line and its technique preparing calcium aluminate powder using white clay
CN209872794U (en) * 2019-03-28 2019-12-31 福建鼎盛元环保科技有限公司 Production line for preparing high-alumina cement by using white mud

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
《中国资源科学百科全书》编辑委员会编: "新编实用化工小商品配方与生产", 中国建材工业出版社, pages: 176 - 177 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110980785A (en) * 2019-11-19 2020-04-10 中国铝业股份有限公司 Sintering method of alumina clinker
CN112159126A (en) * 2020-09-29 2021-01-01 宁波益能机械科技有限公司 Portland cement preparation process
CN114920474A (en) * 2022-04-21 2022-08-19 山东大学 Method for preparing new mineral system high-temperature cement by using aluminum ash and carbide slag
CN114920474B (en) * 2022-04-21 2022-11-29 山东大学 Method for preparing new mineral system high-temperature cement by using aluminum ash and carbide slag

Similar Documents

Publication Publication Date Title
CN108585009A (en) A kind of production line and its technique preparing calcium aluminate powder using white clay
US20210078869A1 (en) Method for preparing calcium oxide using a multistage suspension preheater kiln
CN108975367B (en) Method for efficiently utilizing high-aluminum coal gangue
CN110156356A (en) A kind of production line and its technique preparing high alumina cement using white clay
CN102070309B (en) Method for preparing hydraulic calcium oxide through papermaking alkali recycling causticized white sludge
CN106396432B (en) A kind of method of pulping and paper-making white clay recycling active lime
CN112897542B (en) Process and device for low-temperature rapid calcination modification of kaolin
CN209872794U (en) Production line for preparing high-alumina cement by using white mud
CN102351444B (en) Method for producing high grade cement clinker from full waste residues through rapidly calcining at low temperature
CN112551925B (en) Device and method for comprehensively utilizing gypsum raw material
CN114524631A (en) Kaolin suspension calcining system based on cement clinker sintering system improvement
CN114517915A (en) System and process method for preparing ceramsite by combining waste incineration and sludge
CN208327409U (en) A kind of production line preparing calcium aluminate powder using white clay
CN209872793U (en) Production line for preparing sulphoaluminate cement by using white mud
CN110183123A (en) A kind of production line and its technique preparing sulphate aluminium cement using white clay
CN108609878A (en) A kind of production line and its technique preparing aluminophosphates cementitious material using white clay
CN207943888U (en) The equipment that nepheline preheats predecomposition dry sintering production alumina clinker
CN102320640A (en) Method for decomposing phosphogypsum through coupling reaction heat and vibration fluidizing
CN109627016A (en) A kind of Circulating Fluidized Bed Ash haydites of book structure and preparation method thereof
CN111689788B (en) Alkali mud-based ceramsite and preparation method thereof
CN113045224B (en) System and method for preparing powdery active lime by modifying cement clinker production line
CN107500576A (en) The system and method for preparing clinker
CN1243687C (en) Method for producing phosphoric acid and cement from phosphate ore by hot process
CN210001772U (en) suspension calcining and activating system suitable for clay mine tailings
CN211770967U (en) System for preparing refractory aggregate by using aluminum profile sludge wet method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination