CN102219402A - Method and device for calcining materials - Google Patents

Method and device for calcining materials Download PDF

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Publication number
CN102219402A
CN102219402A CN2011100942589A CN201110094258A CN102219402A CN 102219402 A CN102219402 A CN 102219402A CN 2011100942589 A CN2011100942589 A CN 2011100942589A CN 201110094258 A CN201110094258 A CN 201110094258A CN 102219402 A CN102219402 A CN 102219402A
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calcining
gas
chamber
cooling room
preheating
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CN2011100942589A
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CN102219402B (en
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贾会平
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Shijiazhuang Xinhua Energy Environmental Protection Technology Co Ltd
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SHIJIAZHUANG XINHUA INDUSTRIAL FURNACE Co Ltd
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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
    • Y02P40/40Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills

Abstract

The invention provides a method and a device for calcining materials. The device has a splitting type structure comprises a burning chamber, preheating chambers, a calcining chamber, cooling chambers, a heat accumulator, a gas processing unit, a material conveying machine, a feed device, a discharge device and an exhaust gas discharging system. Material to be calcined is conveyed by the material conveying machine between the preheating chambers, between the preheating chambers and the calcining chamber, between the calcining chamber and the cooling chamber and between the cooling chambers. Smoke generated by the burning in the external burning chamber is processed by the gas processing unit, and then enters the burning chamber for calcining the material. Air for cooling lime and preheating limestone material is subject to dust removing by a cyclone separator and is preheated by the heat accumulator, and then enters the burning chamber for supporting combustion. In the invention, the fuel burning and the material calcining are separated, so that the pollution of lime products caused by harmful substances can be avoided, and the quality of the lime product can be improved. The gas is subject to dust removing and then enters the heat accumulator, thus avoiding blocking a gas channel in the heat accumulator. The material conveying machine is used for conveying the material, so that the conveying efficiency is high, and the occupied space is small.

Description

The method and apparatus of calcining materials
Technical field:
The invention belongs to chemical production technical field, relate to a kind of method and apparatus of calcining materials, be specifically related to a kind of improvement of method and apparatus of split type calcining materials.
Background technology:
Lime also is important source material metallurgical, chemical engineering industry except being the important material of construction.Conventional art is to be starting material with rhombspar, Wingdale, adopts the shaft furnace of band burning beam to be sintered into lime.Such process deficiency is: the building stones in the shaft furnace move from the top down, and furnace gas flows from bottom to top, and furnace gas mobile direction is opposite with building stones mobile direction, the air resistance of building stones is big, and the gas segregation phenomenon appears in furnace pressure height easily, it is inhomogeneous to cause Wingdale to be heated, and influences quality product.The applicant the patent No. be the utility model patent of ZL200320111077.3 disclose a kind of in the external heating type limestone kiln, the firing system of this limestone kiln is provided with combustion tube of furnace beam and air burner, combustion tube of furnace beam is provided with burner (burner), solved the distribution of calcining zone flame and heat effectively, improved efficiency of combustion, but combustion tube of furnace beam needs not only to slattern some heats, and increased equipment cost and process cost with heat-eliminating medium cooling beam body in the course of the work.The limestone kiln needs complete installation, is unfavorable for moving or changing, and also is unfavorable for the producing in serial form element of installation.
The applicant is the method and apparatus that 201010156632.9 application for a patent for invention discloses a kind of calcining materials at number of patent application, the preheating chamber of described equipment, calcining compartment and cooling room are split-type structural, preheating chamber is divided into low-temperature prewarming chamber and high temperature preheating chamber, and cooling room is divided into high temperature cooling chamber and subcooling chamber.Calcined material is carried by bucket type lifting handling equipment between apparatus for feeding, low-temperature prewarming chamber, high temperature preheating chamber, calcining compartment, high temperature cooling chamber, subcooling chamber.Calcined material carries out preheating, calcining and process of cooling in split type preheating chamber, calcining compartment and cooling room, make calcination product.High-temperature gas behind the cooling room chilled product is delivered to preheating chamber preheating calcined material by gas piping.This patent makes full use of heat energy, saves heat-exchange equipment, reduces greenhouse gas emission, helps environment protection.The equipment of this patent is separately made, and field assembly makes things convenient for transportation, installation, equipment inspection and replacing, helps standardization and produces.But this patented technology mixes fuel and Wingdale at calcining compartment, and directly burning makes decomposition of limestone, and the objectionable impuritiess such as sulphur in incendiary dust and the flue gas are attached directly to the surface of lime product, influence the quality of lime product.The gas that contains dust behind cool lime and the preheating Wingdale enters thermophore, accumulates between the heat storage, and the barrier gas circulation passage reduces heat exchange efficiency, needs often cleaning.
Summary of the invention:
For overcoming above-mentioned the deficiencies in the prior art, the invention provides a kind of burning and heating medium cleaning gas, lime product is polluted little calcining materials method, improve the quality of calcination product.Another object of the present invention provides a kind of device of realizing above-mentioned calcining materials method.
The method of calcining materials provided by the invention is, calcined material carries out preheating, calcining and process of cooling through split type roasting assembly, makes lime product, and calcining temperature is 800~1600 ℃.Calcined material is between each preheating chamber, between preheating chamber and the calcining compartment, between calcining compartment and the cooling room and carry by material conveyor between each cooling room.Fuel, combustion-supporting gas burn in external combustion chamber, and to the calcining compartment calcining materials, the flue gas that leaves calcining compartment arrives the exhaust emission system discharging to the flue gas of generation through the smoke duster dedusting, after thermophore is emitted heat after gas treatment equipment is handled.Gas behind the cooling room cool lime product is delivered to preheating chamber preheating calcined material by gas piping, arrives the combustion-supporting burning in combustion chamber then after cyclonic separator dedusting and thermophore preheating.
Calcined material is Wingdale or rhombspar.Fuel is solid fuel, liquid fuel or geseous fuel, or the combination of above-mentioned two or three fuel.Solid fuel is coal dust or coke powder, and combustion-supporting gas is air, pure oxygen or oxygen rich gas, and the oxygen level of oxygen rich gas is 21~100%.
The invention provides a kind of device of calcining materials, described device is a split-type structural.Device comprises: preheating chamber, calcining compartment, cooling room, thermophore, apparatus for feeding, discharging equipment and exhaust emission system.Preheating chamber is connected with apparatus for feeding, and cooling room is connected with discharging equipment, between each preheating chamber, between preheating chamber and the calcining compartment, between calcining compartment and the cooling room and be connected by material conveyor between each cooling room.Gas blower is connected with cooling room 13b, and cooling room 13b is connected with preheating chamber 9a with cooling room 13a, preheating chamber 9b successively by gas piping, is connected to the bottom inlet from the top outlet between each chamber.Described device also is provided with external combustion chamber, gas treatment equipment and smoke duster.The preheating chamber outlet is connected to the combustion chamber by cyclonic separator, T-valve and thermophore.The gas fume of combustion chamber outlet is connected to calcining compartment by gas treatment equipment, and the calcining compartment pneumatic outlet is connected to exhaust emission system by smoke duster, T-valve and thermophore.
Material conveyor is worm conveyor, chapelet, pipe chain lift or board chain hoisting machine.Worm conveyor is a upright structures, mainly is made up of transmission rod, riser tubing, rotary feeding mouth, rotation discharge port, transmission mechanism, motor and base.Thermophore is a vertical structure, and heat storage is housed in the thermophore, and the material of heat storage is ferrous materials, pottery or heat-stable material, heat storage be shaped as spheroplast, column, rectangular block shape body or melikaria or the mixture of above-mentioned shape heat storage.The combustion chamber is provided with 1~10 burner, and exhanst gas outlet is positioned at the opposite of burner; Described burner is geseous fuel burner, liquid fuel burner or solid fuel burner, or the combination of above-mentioned two or three burner.Device is provided with interchanger, and interchanger is a recuperative heat exchanger, and gas blower is connected with water cooler by interchanger.Gas treatment equipment comprises dust removal installation or/and sweetener.Exhaust emission system comprises fly-ash separator, induced draft fan and chimney.The cross section of preheating chamber, calcining compartment and cooling room is circle, rectangle or accurate rectangle.The hull outside of preheating chamber, calcining compartment, cooling room and thermophore is provided with thermal insulation layer.Gas piping is adiabatic transfer line, is lined with flame-proof thermal insulation material in the gas piping.
The effect that the present invention is useful is: 1. by external combustion chamber, fuel is in combustion chambers burn, the high-temperature flue gas that produces arrives calcining compartment calcined limestone material through the gas treatment equipment dedusting or/and the back is handled in desulfurization, fuel combustion and calcining materials are separately, avoid objectionable impurities such as dust and sulfurous gas pollution lime product in the flue gas, improve the quality and the purity of lime product.2. enter thermophore after the process of the gas behind cool lime and the preheating Wingdale cyclonic separator dust removal process, avoid stopping up gas passage in the thermophore, reduce the parking clearing times, prolong the work period, improve heat exchange efficiency.3. use two worm conveyors between each preheating chamber and between preheating chamber and the calcining compartment, convey materials between cooling room and the calcining compartment and between each cooling room, the transport efficiency height, it is little to take up an area of the space.Worm conveyor is simple in structure, is easy to maintenance, is suitable for the charging and discharging mouth of any direction and height, makes things convenient for the planning of integral device.Helical feed machine inlet capable, discharge port rotary moveable door turn to flexibly, cooperate automated operation, become the shared device of mass transport between each chamber.4. exhaust gas emission outlet mounting heat exchanger makes full use of fume afterheat, makes the heat energy utilization optimizing.5. the roasting assembly of split-type structural uses fresh air cool lime product, reduces lime and CO 2Lime product carbonating problem is avoided in contact.6. calcined material can use fritter shape material or powder, saves high-quality raw material.The calcining temperature height, speed is fast, effective.7. because calcining compartment, cooling room and preheating chamber branch are arranged, and calcining compartment can adopt high temperature to carry out the material calcination, little to cooling room and preheating chamber influence, improve operating rate and calcination quality.
Description of drawings
Fig. 1 is the schematic flow sheet of calcining materials device of the present invention;
Fig. 2 is a vertical type worm conveyor structural representation.
Wherein:
1a, the 1b-T-valve, 2-coal powder injection equipment, the 3-combustion chamber, 4a, the 4b-thermophore, the 5-cyclonic separator, the 6-gas treatment equipment, the 7-calcining compartment, the 8-apparatus for feeding, 9a, the 9b-preheating chamber, 10a, the 10b-worm conveyor, the 11-interchanger, the 12-gas blower, 13a, the 13b-cooling room, 14-discharging equipment, 15-rotates discharge port, the 16-riser tubing, the 17-transmission rod, the 19-base, the 20-transmission mechanism, the 21-motor, 22-rotary feeding mouth, the 23-valve, the 24-smoke duster.
Embodiment
The present invention is described further below in conjunction with accompanying drawing.
The device of calcining materials of the present invention comprises as shown in Figure 1: combustion chamber 3, preheating chamber (9a, 9b), calcining compartment 7, cooling room (13a, 13b), cyclonic separator 5, interchanger 11, worm conveyor (10a, 10b), smoke duster 24, thermophore (4a, 4b), apparatus for feeding 8, discharging equipment 14 and exhaust emission system.Device is combustion chamber, preheating chamber, calcining compartment and cooling room split-type structural.Preheating chamber 9a is the low-temperature prewarming chamber, and preheating chamber 9b is the high temperature preheating chamber, and cooling room 13a is the high temperature cooling chamber, and cooling room 13b is the subcooling chamber.The opening for feed of preheating chamber, calcining compartment and cooling room lays respectively at top, and discharge port is positioned at the bottom.Preheating chamber 9a is connected with apparatus for feeding, and cooling room 13b is connected with discharging equipment.Between preheating chamber 9a and the preheating chamber 9b, be connected by worm conveyor 10a between preheating chamber 9b and the calcining compartment 7, between calcining compartment and the cooling room 13a, be connected by worm conveyor 10b between cooling room 13a and the cooling room 13b.As shown in Figure 2, worm conveyor 10 is a upright structures, is made up of transmission rod 17, riser tubing 16, rotary feeding mouth 22, rotation discharge port 15, transmission mechanism 20, motor 21 and base 19.The opening for feed of each chamber is connected with the rotation discharge port 15 that helical feed connects, and the discharge port of each chamber is connected with the rotary feeding mouth 22 of worm conveyor.Gas blower 12 outlet is divided into two-way, and one the tunnel is connected with water cooler 13b, and the interchanger 11 of leading up to is connected with water cooler 13b, and two-way all is provided with valve 23, is used to regulate the temperature that enters cooling room 13b air.Cooling room 13b is connected with preheating chamber 9a with cooling room 13a, preheating chamber 9b successively by gas piping, is connected to the bottom inlet from the top outlet between each chamber.Preheating chamber 9a exports the burner place that is connected to combustion chamber 3 by cyclonic separator 5, T-valve 1a and thermophore 4a, 4b, and the thermophore outlet is provided with valve 23.Be provided with 1~10 solid fuel burner in the combustion chamber, burner is connected with coal powder injection equipment 2, and exhanst gas outlet is positioned at the opposite of burner.The gas fume of combustion chamber outlet is connected to calcining compartment 7 by gas treatment equipment 6, and gas treatment equipment comprises dust removal installation, and dust removal installation is the gravity settling fly-ash separator.The calcining compartment pneumatic outlet is connected to exhaust emission system by smoke duster 24, T-valve 1b, thermophore (4a, 4b), interchanger 11, and the thermophore outlet is provided with valve 23.Smoke duster is the gravity settling fly-ash separator.Thermophore is a vertical structure, and heat storage is the steel spherule in the thermophore.Exhaust emission system comprises fly-ash separator, induced draft fan and chimney, and fly-ash separator is a sack cleaner.The cross section of preheating chamber, cooling room and thermophore is circular, and the cross section of combustion chamber, calcining compartment is a rectangle.Combustion chamber, preheating chamber, calcining compartment, cooling room and thermophore hull outside are provided with thermal insulation layer.Gas piping is adiabatic transfer line, is lined with flame-proof thermal insulation material in the gas piping.
Present embodiment is a calcined material with the Wingdale, is fuel with the pulverized anthracite, and calcination process is: Wingdale is delivered to preheating chamber 9a by apparatus for feeding 8 through material inlet, and the high temperature air that comes from preheating chamber 9b carries out preheating to the limestone material the preheating chamber 9a.Be preheated to 200~300 ℃ limestone material and send into preheating chamber 9b by worm conveyor and carry out high temperature preheating, the Wingdale that is preheated to 700~800 ℃ is sent into calcining compartment 7 by worm conveyor.The Wingdale of the high-temperature flue gas of coming from combustion chamber 3 after to preheating calcined, and calcining temperature is 1200~1400 ℃.Lime after the calcining is sent into cooling room 13a by worm conveyor and is carried out high temperature cooling, lime temperature behind the high temperature cooling is 600~700 ℃, send into cooling room 13b by worm conveyor by cooling room 13a again and carry out subcooling, lime temperature after the subcooling is 100~200 ℃, and cooled lime product goes out device through discharging equipment 14.The cooling air that is produced by gas blower 12 divides two-way, and one the tunnel enters cooling room 13b through interchanger 11, and one the tunnel directly enters cooling room 13b, regulates the temperature that enters cooling room 13b air by the valve on the two-way 23.Cooling air cools off cooling room 13b earlier, and the air after temperature raises cools off the high temperature lime that is entered cooling room by calcining compartment to cooling room 13a through airline.The air that raises through temperature after subcooling and the high temperature cooling lime product enters preheating chamber 9b, 9a preheating limestone material successively.Leave air combustion-supporting burning to the combustion chamber after cyclonic separator dedusting and thermophore preheating of preheating chamber 9a.The air mixed burning of coal dust after coal powder injection equipment 2 arrives combustion chamber and preheating, the flue gas of generation arrives calcining compartment calcined limestone material after the gas treatment equipment dust removal process.Leave the waste gas of calcining compartment and after smoke duster 24 dedustings, emit heat, behind interchanger 11 recovery waste heats, discharge again to exhaust emission system at thermophore 4a, 4b.Two thermophore accumulation of heat heat release alternate runs, operating process is, the high-temperature flue gas that leaves calcining compartment 7 after T-valve 1b enters thermophore 4a, is passed to heat storage in the thermophore to heat in the smoke duster dedusting, then through valve 23, interchanger 11 to the exhaust emission system discharging.The air that leave cyclonic separator 5 this moment enters thermophore 4b through T-valve 1a, and the heat storage in the thermophore is emitted the heat preheated air, the combustion-supporting burning of air admission combustion chamber burner after the preheating.To the exhaust emission system discharging, air is combustion-supporting to the combustion chamber after thermophore 4a preheating after thermophore 4b heat release for commutation then, flue gas.According to the mensuration temperature control commutation of thermophore outlet flue gas, the temperature value of present embodiment control commutation is 150 ℃, commutates when the thermophore exit gas temperature is lower than 150 ℃.Switch operation is carried out in the action of the outlet valve 23 by T-valve 1a, 1b and thermophore automatically.

Claims (10)

1. the method for a calcining materials, calcined material carries out preheating through split type roasting assembly, calcining and process of cooling, make lime product, calcining temperature is 800~1600 ℃, described calcined material is at each preheating chamber (9a, 9b), between preheating chamber and the calcining compartment (7), reach each cooling room (13a between calcining compartment and the cooling room, carry by material conveyor 13b), it is characterized in that: fuel, combustion-supporting gas burns in external combustion chamber (3), to the calcining compartment calcining materials, the flue gas that leaves calcining compartment is through the smoke duster dedusting after gas treatment equipment (6) is handled for the flue gas that produces, at thermophore (4a, 4b) emit behind the heat to the exhaust emission system discharging; Gas behind the cooling room cool lime product is delivered to preheating chamber preheating calcined material by gas piping, arrives the combustion-supporting burning in combustion chamber then after cyclonic separator dedusting and thermophore preheating.
2. according to the method for the described calcining materials of claim 1, it is characterized in that: described calcined material is Wingdale or rhombspar; Described fuel is solid fuel, liquid fuel or geseous fuel, or the combination of above-mentioned two or three fuel, and described solid fuel is coal dust or coke powder, and described combustion-supporting gas is air, pure oxygen or oxygen rich gas, and the oxygen level of oxygen rich gas is 21~100%.
3. the device of a calcining materials, described device is a split-type structural, comprise: preheating chamber (9a, 9b), calcining compartment (7), cooling room (13a, 13b), thermophore (4a, 4b), apparatus for feeding (8), discharging equipment (14) and exhaust emission system, described preheating chamber (9a) is connected with apparatus for feeding, cooling room (13b) is connected with discharging equipment, between each preheating chamber, between preheating chamber and the calcining compartment, between calcining compartment and the cooling room and be connected by material conveyor between each cooling room, gas blower (12) is connected with cooling room (13b), cooling room (13b) by gas piping successively with cooling room (13a), preheating chamber (9b) is connected with preheating chamber (9a), be connected to the bottom inlet from the top outlet between each chamber, it is characterized in that: described device also is provided with external combustion chamber (3), gas treatment equipment (6) and smoke duster (24), preheating chamber (9a) outlet is by cyclonic separator (5), T-valve (1a) and thermophore (4a, 4b) be connected to combustion chamber (3), the gas fume of combustion chamber outlet is connected to calcining compartment (7) by gas treatment equipment (6), and the calcining compartment pneumatic outlet is by smoke duster (24), T-valve (1b) and thermophore (4a, 4b) be connected to exhaust emission system.
4. according to the device of the described calcining materials of claim 3, it is characterized in that: described material conveyor is worm conveyor (10a, 10b), chapelet, pipe chain lift or board chain hoisting machine.
5. according to the device of the described calcining materials of claim 4, it is characterized in that: described worm conveyor is a upright structures, mainly is made up of transmission rod (17), riser tubing (16), rotary feeding mouth (22), rotation discharge port (15), transmission mechanism (20), motor (21) and base (19).
6. according to the device of the described calcining materials of claim 3, it is characterized in that: described thermophore is a vertical structure, heat storage is housed in the thermophore, the material of described heat storage is ferrous materials, pottery or heat-stable material, heat storage be shaped as spheroplast, column, rectangular block shape body or melikaria or the mixture of above-mentioned shape heat storage.
7. according to the device of the described calcining materials of claim 3, it is characterized in that: described combustion chamber is provided with 1~10 burner, and exhanst gas outlet is positioned at the opposite of burner; Described burner is geseous fuel burner, liquid fuel burner or solid fuel burner, or the combination of above-mentioned two or three burner.
8. according to the device of the described calcining materials of claim 3, it is characterized in that: described device is provided with interchanger (11), and described interchanger is a recuperative heat exchanger; Gas blower (12) is connected with cooling room (13b) by interchanger.
9. according to the device of the described calcining materials of claim 3, it is characterized in that: described gas treatment equipment comprises dust removal installation or/and sweetener; Described exhaust emission system comprises fly-ash separator, induced draft fan and chimney.
10. according to the device of the described calcining materials of claim 3, it is characterized in that: the cross section of preheating chamber, calcining compartment and cooling room is circle, rectangle or accurate rectangle, and the hull outside of preheating chamber, calcining compartment, cooling room and thermophore is provided with thermal insulation layer; Described gas piping is adiabatic transfer line, is lined with flame-proof thermal insulation material in the gas piping.
CN201110094258A 2011-04-14 2011-04-14 Method and device for calcining materials Active CN102219402B (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102627415A (en) * 2012-04-20 2012-08-08 桂林灵川县金山思达新型材料厂 Energy-saving environmental-friendly lime production line for rotary electrical kiln
CN103043697A (en) * 2012-12-28 2013-04-17 刘立文 Device for producing calcium oxide by using gypsum
CN104129930A (en) * 2014-07-30 2014-11-05 石家庄新华能源环保科技股份有限公司 Calcining apparatus with powder coal as fuel
CN104129931A (en) * 2014-07-30 2014-11-05 石家庄新华能源环保科技股份有限公司 Indirect heating calcining device with generating equipment
CN104446017A (en) * 2014-10-25 2015-03-25 石家庄新华能源环保科技股份有限公司 Barrier wall type calcining device
CN108863114A (en) * 2018-07-06 2018-11-23 沈阳化工大学 A kind of method that the light-burned process waste heat of magnesite recycles
CN109052998A (en) * 2018-10-29 2018-12-21 陈建刚 A kind of horizontal boiling furnace and the method using its calcining little particle lime stone

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KR20040056542A (en) * 2002-12-24 2004-07-01 재단법인 포항산업과학연구원 Cog burner for limestone calcining furnace
CN101445333A (en) * 2008-11-25 2009-06-03 中信重工机械股份有限公司 Method for calcining active lime by taking tail gas from sealing type calcium carbide furnace as fuel for rotary kiln
CN101885588A (en) * 2010-06-28 2010-11-17 贾会平 Split material calcining method and machine
CN102001837A (en) * 2010-10-14 2011-04-06 贾会平 Method and device for calcining materials by using low calorific value fuel

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Publication number Priority date Publication date Assignee Title
KR20040056542A (en) * 2002-12-24 2004-07-01 재단법인 포항산업과학연구원 Cog burner for limestone calcining furnace
CN101445333A (en) * 2008-11-25 2009-06-03 中信重工机械股份有限公司 Method for calcining active lime by taking tail gas from sealing type calcium carbide furnace as fuel for rotary kiln
CN101885588A (en) * 2010-06-28 2010-11-17 贾会平 Split material calcining method and machine
CN102001837A (en) * 2010-10-14 2011-04-06 贾会平 Method and device for calcining materials by using low calorific value fuel

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102627415A (en) * 2012-04-20 2012-08-08 桂林灵川县金山思达新型材料厂 Energy-saving environmental-friendly lime production line for rotary electrical kiln
CN103043697A (en) * 2012-12-28 2013-04-17 刘立文 Device for producing calcium oxide by using gypsum
CN103043697B (en) * 2012-12-28 2014-12-24 刘立文 Device for producing calcium oxide by using gypsum
CN104129930A (en) * 2014-07-30 2014-11-05 石家庄新华能源环保科技股份有限公司 Calcining apparatus with powder coal as fuel
CN104129931A (en) * 2014-07-30 2014-11-05 石家庄新华能源环保科技股份有限公司 Indirect heating calcining device with generating equipment
CN104446017A (en) * 2014-10-25 2015-03-25 石家庄新华能源环保科技股份有限公司 Barrier wall type calcining device
CN108863114A (en) * 2018-07-06 2018-11-23 沈阳化工大学 A kind of method that the light-burned process waste heat of magnesite recycles
CN108863114B (en) * 2018-07-06 2021-09-21 沈阳化工大学 Method for recycling waste heat in magnesite light burning process
CN109052998A (en) * 2018-10-29 2018-12-21 陈建刚 A kind of horizontal boiling furnace and the method using its calcining little particle lime stone

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