CN104086107A - Method of comprehensively utilizing precipitator ash and slag of calcium carbide furnace - Google Patents

Method of comprehensively utilizing precipitator ash and slag of calcium carbide furnace Download PDF

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Publication number
CN104086107A
CN104086107A CN201410313650.1A CN201410313650A CN104086107A CN 104086107 A CN104086107 A CN 104086107A CN 201410313650 A CN201410313650 A CN 201410313650A CN 104086107 A CN104086107 A CN 104086107A
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CN
China
Prior art keywords
calcium carbide
carbide furnace
slag
dust removal
ash
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Application number
CN201410313650.1A
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Chinese (zh)
Inventor
张立
安志明
陈涛
张新程
刘哲
宋斌
李金任
蔡雪融
周向东
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新疆天业(集团)有限公司
天能化工有限公司
天辰化工有限公司
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Priority to CN201410313650.1A priority Critical patent/CN104086107A/en
Publication of CN104086107A publication Critical patent/CN104086107A/en

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    • 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

Abstract

The invention relates to a method of comprehensively utilizing precipitator ash and slag of a calcium carbide furnace. In the method, a calcium carbide furnace precipitator ash collecting system, a conveying system, an incineration system, an ash conveying system and a cement production system are mainly utilized; the calcium carbide furnace precipitator ash passes through a dust cabin, and is fed to an incineration device sequentially through a pressurizing device, a buffer device and an ejector of the conveying system; the calcium carbide furnace precipitator ash and coal ash accelerated by the ejector enter a combustion section of the incineration device, a cooling device is arranged at the outlet of the incineration device, and the cooled ash enters a cement raw material section through the ash conveying system by a conveying pump. The method provided by the invention mainly solves the problem of conveying and utilizing the calcium carbide furnace precipitator ash and slag. Meanwhile, two kinds of slag are comprehensively utilized by virtue of one process, so that the purposes of efficiency, energy conservation and environmental protection are realized.

Description

A kind of method of dust removal of calcium carbide furnace and comprehensive utilization of slag
Technical field
A kind of method that the present invention relates to field of environment protection metallurgy industry blast furnace dedusting ash elimination of dust contamination, is specially adapted to the comprehensive utilization of dust removal of calcium carbide furnace and blast-furnace slag.
Background technology
In closed calcium carbide furnace production process, calcium carbide per ton approximately produces 40kg dedusting ash, its main component (massfraction): CaO 58%~65%, C 18%~25%, SiO 25%~8%, MgO 1%~5%, Al 2o 31%~2%, Fe 2o 3be about 1% left and right, dust is all the superfine particle of granularity, and its light specific gravity, specific surface area are large and have certain viscosity, and water insoluble, due to materials such as carbon containing, phosphorus, sulphur, inflammable, explosive after dust contacts with air, there is great potential safety hazard, so transport intractability is larger; Simultaneously calcium carbide raw materials for production raw material of wood-charcoal is in drying course, the coal-fired slag of discharging of incinerator, and main component is the oxide compound of ferrosilicoaluminum and a certain amount of calcium, wherein SiO 250%~56%, Al 2o 315%~19%, Fe 2o 38%~10%, CaO 5%~8%, MgO 1%~5%, because slag granules volume is large, activity is lower, is unfavorable for the direct utilization of follow-up system.At present, domestic most calcium carbide enterprise mainly takes to concentrate the processing mode of landfill for dust removal of calcium carbide furnace and slag, by dust removal of calcium carbide furnace and slag as common native slag stack, landfill disposal, the occupation of land face of causing is large, environmental pollution is serious, under the pressure of environmental protection pressure, directly threaten the existence of enterprise; Also minority enterprise is directly used as cement producting material, but in the time utilizing, and because it is inflammable, airborne dust occurs dust proportion easily, the active feature such as low, also brought disadvantageous effect to manufacture of cement.In addition, dust removal of calcium carbide furnace and slag all adopt Automobile Transportation, in unloading ash and transporting process, exist serious dust raising phenomenon, and plant environment has been caused to certain pollution, and motor transport cost is higher simultaneously, has indirectly increased the production cost of calcium carbide.
In prior art, the method that dust removal of calcium carbide furnace adopts humidification to stir is processed, dust removal of calcium carbide furnace volumetric shrinkage after humidification, stop dust removal of calcium carbide furnace spontaneous combustion hidden danger, effectively reduce dust removal of calcium carbide furnace and cause reentrainment of dust to pollute, but dust removal of calcium carbide furnace stack and still take a large amount of places, and along with the evaporation of moisture, in transportation, also can produce dust raising phenomenon, fail all the time thoroughly to solve the problem of the pollution-free processing of dust removal of calcium carbide furnace.Also has minority enterprise raw material as production cement after dust removal of calcium carbide furnace and lime end stir in certain proportion.Mix object and be eliminate that the granularity of dedusting ash is little, the characteristic such as light specific gravity, specific surface area are large, easy firing, facilitate it to be directly used in production cement, but in the process of dust removal of calcium carbide furnace and the stirring of lime end and conveying, because dust light specific gravity has still caused serious secondary pollution to environment.
Chinese patent 201320481028.2, discloses a kind of dry-method dedusting dense-phase pneumatic transmission system of blast furnace, has solved inlet valve in delivery system, the problem of exit bend wearing and tearing, but do not solve the problem of dedusting ash comprehensive utilization.
The comprehensive utilization how present stage thoroughly solves dust removal of calcium carbide furnace and slag is a great problem that calcium carbide industry faces, therefore, a kind of method of dust removal of calcium carbide furnace and comprehensive utilization of slag is provided, using the lime-ash after dust removal of calcium carbide furnace and coal dust mixed firing can be directly as the high quality raw material of subordinate's production unit, thoroughly solve dust removal of calcium carbide furnace and slag and carry and utilize problem, realize the comprehensive utilization of two kinds of waste residues, be that current calcium carbide industry technology personnel thirst for the technical problem solving simultaneously.
Summary of the invention
The object of the invention is to solve in prior art, the treatment process of dust removal of calcium carbide furnace and slag falls behind, environmental pollution is large, cost recovery is higher, transport is difficult, the problem such as cannot directly utilize, and then provide a kind of simple to operate, whole process closed transport process, pollution-free, cost recovery is cheap, produces the method for cement high quality raw material simultaneously.
The present invention solves its Technology and device problem realizes by following scheme.
A method for dust removal of calcium carbide furnace and comprehensive utilization of slag, mainly comprises dust removal of calcium carbide furnace gathering system, delivery system, incineration system, lime-ash delivery system, cement production system; Its dust removal of calcium carbide furnace is by dust storehouse, be sent to incinerator through pressurizing device, snubber assembly and the injector of delivery system successively, dust removal of calcium carbide furnace and coal dust enter the burning zone of incinerator after accelerating by injector respectively, incinerator outlet arranges cooling system, cooled lime-ash, by lime-ash delivery system, enters cement raw material workshop section through transferpump; Two opening for feeds of incinerator all arrange injector, dust removal of calcium carbide furnace passes through injector, evenly enter incinerator burning zone by opening for feed A, the carbon dust in dedusting ash is removed in burning, coal dust evenly enters incinerator burning zone through injector by opening for feed B, makes dust removal of calcium carbide furnace and coal dust fully calcined in incinerator; In calcination process, in dust removal of calcium carbide furnace, the silicon-dioxide in calcium oxide and coal dust forms 3CaOSiO 2and 2CaOSiO 2binding substances, this binding substance can be used as the high quality raw material of manufacture of cement, is directly used in production cement.
Described a kind of dust removal of calcium carbide furnace and the method for comprehensive utilization of slag, its incinerator is connected to form by body of heater, opening for feed A, opening for feed B, blocking material plate, discharge port, venting port, blower fan, bellows, air distribution plate, blast cap, slag storehouse; Opening for feed A, opening for feed B, venting port are connected in turn on body of heater, and bottom of furnace body discharge port arranges slag storehouse, and slag storehouse internal upper part arranges bellows, bellows import connecting fan, and bellows and bottom of furnace body junction are provided with air distribution plate, and air distribution plate upper end evenly arranges blast cap; Slag storehouse internal upper part arranges bellows, when blower fan is by bellows during to incinerator air feed, can be the lime-ash that enters slag storehouse by discharge port lowers the temperature for the first time, air distribution plate upper end blast cap evenly arranges, can make material in incinerator, more easily form fluidized, make dust removal of calcium carbide furnace and coal dust firing abundant.
Described a kind of dust removal of calcium carbide furnace and the method for comprehensive utilization of slag, all downward-sloping settings of two opening for feeds of its incinerator, form the angle of 20 ° ~ 60 ° with body of heater, and opening for feed A upper end is provided with blocking material plate; Opening for feed is downward-sloping setting all, more easily makes dust removal of calcium carbide furnace and coal dust enter burning zone, and because dust removal of calcium carbide furnace is extremely light, superfine, opening for feed A upper end is provided with blocking material plate, can prevent that part dedusting ash from directly discharging with flue gas.
The method of described a kind of dust removal of calcium carbide furnace and comprehensive utilization of slag, its dedusting ash dust storehouse, inside arranges blowing device, and attemperator is equipped with in outside, and fluidizer is equipped with in bottom, and on fluidizer, uniform plane is furnished with downward manhole; Blowing device can be removed the dust of dust storehouse inwall and outlet bonding in time, avoid equipment to stop up, attemperator makes dust removal of calcium carbide furnace keep at a certain temperature good mobility, be convenient to carry, on fluidizer, planar cloth has downward manhole, when pressurization, at the bottom of storehouse, dust upwards flows, and has avoided the problem of dust at storehouse base plate knot.
Described a kind of dust removal of calcium carbide furnace and the method for comprehensive utilization of slag, its snubber assembly is that cylindrical structure, cone structure, hemispherical end enclosure structure connect to form successively, cone structure top connects cylindrical structure, form sealed cavity, cone structure bottom connects hemispherical end enclosure structure, and at least two discharge ports are set; The device of three kinds of shape and structure compositions, has effectively avoided dust removal of calcium carbide furnace to be bonded on bulkhead.
Described a kind of dust removal of calcium carbide furnace and the method for comprehensive utilization of slag, its snubber assembly bottom is provided with weighing device, and top is provided with filters and pressure relief device, and inner side is furnished with the circular injection hole of even size, be connected on blowing device, heating unit or lagging material are equipped with in outside; The blowing device arranging in snubber assembly and arranging of snubber assembly outside are heated or attemperator, can prevent that dust removal of calcium carbide furnace from adhering to caking, occluding device, snubber assembly bottom arranges weighing device, the signal of dust removal of calcium carbide furnace weight in snubber assembly can be sent to Controlling System, realize Long-distance Control.
Described a kind of dust removal of calcium carbide furnace and the method for comprehensive utilization of slag, be provided with material-level detecting device, pressure-detecting device in its pressurization storehouse; Controlling System is controlled automatically according to material level and pressure, in the time that pressure detection reaches setting minimum value, charging system starts automatically, in the time that material level detection reaches setting maximum value, charging system quits work automatically, pressurization storehouse delivery system starts, and whole system realizes interlocked control, has ensured the security of system.
Described a kind of dust removal of calcium carbide furnace and the method for comprehensive utilization of slag, the gas under pressure that its dust removal of calcium carbide furnace is carried is nitrogen or rare gas element; Can there is not inflammable, explosive phenomenon in dust removal of calcium carbide furnace, nitrogen is carried the security of the system that ensured in nitrogen.
The method of a kind of dust removal of calcium carbide furnace of the present invention and comprehensive utilization of slag, it adjusts the ratio of dust removal of calcium carbide furnace and coal dust, rationally controls incinerator fire box temperature, and the lime-ash after calcining can be directly as producing cement clinker.
The invention has the beneficial effects as follows.
Dust removal of calcium carbide furnace and coal dust by injector conveying in improved incinerator, carbon dust in dust removal of calcium carbide furnace is fully burnt, alternative part of fuel, remove the material such as phosphorus, sulphur simultaneously, eliminated potential safety hazard, realized dust removal of calcium carbide furnace harmless treatment, the calcic lime-ash producing, binding substances with the siliceous slag formation Calucium Silicate powder producing after coal dust firing, meets the requirement of cement raw material, can directly adopt same sealing-duct to be delivered to cement raw material workshop section; This technique has realized the comprehensive utilization of two kinds of waste residues of a kind of technique, thereby effectively reduce workman's labour intensity, reduce the recycling cost of dust removal of calcium carbide furnace, improved transport efficiency and the utilization ratio of dust removal of calcium carbide furnace, reached objects efficient, energy-saving and environmental protection simultaneously.
Brief description of the drawings
Fig. 1 is process flow sheet of the present invention.
Fig. 2 is incinerator structure iron of the present invention.
Embodiment
The invention provides a kind of method of dust removal of calcium carbide furnace and comprehensive utilization of slag, dust removal of calcium carbide furnace is realized to closed to be carried, and with coal dust burning disposal after be directly used as the raw material of manufacture of cement, thoroughly solve the problem of utilizing of dust removal of calcium carbide furnace and slag, also solved the transportation problem of dust removal of calcium carbide furnace and lime-ash simultaneously, the technical scheme providing for a better understanding of the present invention, below in conjunction with accompanying drawing and specific examples, the present invention is described in further detail.
With reference to accompanying drawing 1-2, a kind of method of dust removal of calcium carbide furnace and comprehensive utilization of slag, mainly comprises dust removal of calcium carbide furnace gathering system, delivery system, incineration system, lime-ash delivery system, cement production system, the dedusting ash that furnace of calcium carbide is collected is stored in dust storehouse 1, unloading valve 2 by 1 bottom, dust storehouse enters transfer roller 3, by transfer roller 3, dedusting ash is sent into pressurizing device 4, carry source of the gas to be connected to the bottom of pressurizing device 4, dedusting ash is pressurizeed, dedusting ash after pressurization enters in snubber assembly 5 by transport pipe, in the time that the weighing device in snubber assembly 5 reaches set(ting)value, pressurizing device 4 stops carrying dedusting ash to snubber assembly 5, the rotation unloading valve 6 of snubber assembly 5 bottoms starts, dedusting ash is delivered to injector 7 by rotary discharge valve 6, after injector 7 accelerates dedusting ash, entered by opening for feed 14 in the combustion chamber of incinerator 8, coal dust is entered by opening for feed 15 in the combustion chamber of incinerator 8 by injector, blower fan 19 provides air quantity to incinerator 8 by bellows 20, and entered in incinerator 8 by the blast cap 22 of air distribution plate 21 upper ends, make the interior formation fluidized-bed of incinerator 8, dust removal of calcium carbide furnace and coal dust are fully burnt, lime-ash after burning enters in slag storehouse 23 by discharge port 17, the gas that burning produces is discharged by venting port 18, lime-ash is discharged by the bottom ash discharging hole 9 of incinerator 8, enter after refrigerating unit 10 cooling processing, transferpump 11 by lime-ash delivery system is directly delivered to manufacture of cement workshop section 12.
Above the method for a kind of dust removal of calcium carbide furnace provided by the present invention and comprehensive utilization of slag is described in detail.Applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.

Claims (8)

1. a method for dust removal of calcium carbide furnace and comprehensive utilization of slag, mainly comprises dust removal of calcium carbide furnace gathering system, delivery system, incineration system, lime-ash delivery system, cement production system; It is characterized in that dust removal of calcium carbide furnace passes through dust storehouse, be sent to incinerator through pressurizing device, snubber assembly and the injector of delivery system successively, dust removal of calcium carbide furnace and coal dust enter the burning zone of incinerator after accelerating by injector respectively, incinerator outlet arranges refrigerating unit, cooled lime-ash, by lime-ash delivery system, enters cement raw material workshop section through transferpump.
2. the method for a kind of dust removal of calcium carbide furnace according to claim 1 and comprehensive utilization of slag, is characterized in that incinerator is connected to form by body of heater, opening for feed A, opening for feed B, blocking material plate, discharge port, venting port, blower fan, bellows, air distribution plate, blast cap, slag storehouse; Opening for feed A, opening for feed B, venting port are connected in turn on body of heater, and bottom of furnace body discharge port arranges slag storehouse, and slag storehouse internal upper part arranges bellows, bellows import connecting fan, and bellows and bottom of furnace body junction are provided with air distribution plate, and air distribution plate upper end is evenly provided with blast cap.
3. the method for a kind of dust removal of calcium carbide furnace according to claim 2 and comprehensive utilization of slag, is characterized in that all downward-sloping settings of two opening for feeds of incinerator, forms the angle of 20 ° ~ 60 ° with body of heater, and opening for feed A upper end is provided with blocking material plate.
4. the method for a kind of dust removal of calcium carbide furnace according to claim 1 and comprehensive utilization of slag, it is characterized in that snubber assembly is that cylindrical structure, cone structure, hemispherical end enclosure structure connect to form successively, cone structure top connects cylindrical structure, form sealed cavity, cone structure bottom connects hemispherical end enclosure structure, and discharge port is set.
5. the method for a kind of dust removal of calcium carbide furnace according to claim 1 and comprehensive utilization of slag, it is characterized in that dust removal of calcium carbide furnace dust storehouse, inside arranges blowing device, and attemperator is equipped with in outside, fluidizer is equipped with in bottom, and on fluidizer, uniform plane is furnished with downward manhole.
6. the method for a kind of dust removal of calcium carbide furnace according to claim 4 and comprehensive utilization of slag, it is characterized in that snubber assembly bottom is provided with weighing device, top is provided with filtration pressure relief device, inner side is furnished with the circular injection hole of even size, be connected on blowing device, heating unit or lagging material are equipped with in outside.
7. the method for a kind of dust removal of calcium carbide furnace according to claim 1 and comprehensive utilization of slag, is provided with material-level detecting device, pressure-detecting device in the storehouse that it is characterized in that pressurizeing.
8. the method for a kind of dust removal of calcium carbide furnace according to claim 1 and comprehensive utilization of slag, is characterized in that the gas under pressure that dedusting ash is carried is nitrogen or rare gas element.
CN201410313650.1A 2014-07-03 2014-07-03 Method of comprehensively utilizing precipitator ash and slag of calcium carbide furnace CN104086107A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104596247A (en) * 2015-01-14 2015-05-06 开封和成特种耐火材料有限公司 Composite electric furnace
CN105130237A (en) * 2015-07-08 2015-12-09 新疆中丹富兴新材料技术有限公司 Cement base material expanding agent and preparation method thereof
CN105669280A (en) * 2016-04-22 2016-06-15 新疆中合大正商贸有限公司 Process for producing silicon fertilizer by utilizing electrothermal process calcium carbide furnace precipitator dust
CN106440838A (en) * 2016-11-18 2017-02-22 沈林彬 Calcium carbide furnace purification ash gas conveying and incineration device
CN107010627A (en) * 2017-04-11 2017-08-04 北京柯林斯达科技发展有限公司 A kind of method that calcium carbide furnace gas dedusting ash, semi-coke end and pulverized limestone recycle production pelletizing carbide raw material
CN108278618A (en) * 2018-02-08 2018-07-13 肖新房 A kind of dedusting ash and purification ash treatment system and working method
CN108423682A (en) * 2018-03-29 2018-08-21 北京动力源科技股份有限公司 A kind of calcium carbide factory's ash resource comprehensive circulation utilization method and system
CN109179468A (en) * 2018-09-17 2019-01-11 石嘴山市鹏盛化工有限公司 The raw materials for production and its production technology of ash production calcium oxide are purified using calcium carbide furnace gas
CN109187182A (en) * 2018-08-29 2019-01-11 马鞍山赤源冶金科技有限公司 A method of for detecting clinker reactivity worth
CN109556415A (en) * 2018-11-15 2019-04-02 安徽华塑股份有限公司 It is a kind of to utilize cement kiln synergic processing furnace of calcium carbide purification apparatus for ash and technique
CN110980302A (en) * 2019-11-22 2020-04-10 陕西北元化工集团股份有限公司 Dust removal recycling and transporting system

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CN102829642A (en) * 2012-09-24 2012-12-19 天津辰创环境工程科技有限责任公司 Furnace dust incineration processing method of calcium carbid furnace
CN103759255A (en) * 2014-01-20 2014-04-30 苏州新区特氟龙塑料制品厂 Teflon fluidized bed furnace
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CN1037497A (en) * 1988-05-14 1989-11-29 范永根 Utilize rich calcium industrial residue production increasing calcium slags such as carbide slag, white clay and red mud
CN1966443A (en) * 2006-11-12 2007-05-23 新疆建材设计研究院(有限公司) Cement chamotte production method of calcium carbide 100% substituting for natural calcic material and decomposed out of kiln
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104596247A (en) * 2015-01-14 2015-05-06 开封和成特种耐火材料有限公司 Composite electric furnace
CN105130237A (en) * 2015-07-08 2015-12-09 新疆中丹富兴新材料技术有限公司 Cement base material expanding agent and preparation method thereof
CN105669280A (en) * 2016-04-22 2016-06-15 新疆中合大正商贸有限公司 Process for producing silicon fertilizer by utilizing electrothermal process calcium carbide furnace precipitator dust
CN106440838A (en) * 2016-11-18 2017-02-22 沈林彬 Calcium carbide furnace purification ash gas conveying and incineration device
CN107010627A (en) * 2017-04-11 2017-08-04 北京柯林斯达科技发展有限公司 A kind of method that calcium carbide furnace gas dedusting ash, semi-coke end and pulverized limestone recycle production pelletizing carbide raw material
CN108278618A (en) * 2018-02-08 2018-07-13 肖新房 A kind of dedusting ash and purification ash treatment system and working method
CN108423682A (en) * 2018-03-29 2018-08-21 北京动力源科技股份有限公司 A kind of calcium carbide factory's ash resource comprehensive circulation utilization method and system
CN109187182A (en) * 2018-08-29 2019-01-11 马鞍山赤源冶金科技有限公司 A method of for detecting clinker reactivity worth
CN109187182B (en) * 2018-08-29 2020-10-23 马鞍山赤源冶金科技有限公司 Method for detecting slag reaction performance
CN109179468A (en) * 2018-09-17 2019-01-11 石嘴山市鹏盛化工有限公司 The raw materials for production and its production technology of ash production calcium oxide are purified using calcium carbide furnace gas
CN109556415A (en) * 2018-11-15 2019-04-02 安徽华塑股份有限公司 It is a kind of to utilize cement kiln synergic processing furnace of calcium carbide purification apparatus for ash and technique
CN110980302A (en) * 2019-11-22 2020-04-10 陕西北元化工集团股份有限公司 Dust removal recycling and transporting system

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