CN102382976A - Fluidized boiling roasting furnace - Google Patents

Fluidized boiling roasting furnace Download PDF

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Publication number
CN102382976A
CN102382976A CN2011103504853A CN201110350485A CN102382976A CN 102382976 A CN102382976 A CN 102382976A CN 2011103504853 A CN2011103504853 A CN 2011103504853A CN 201110350485 A CN201110350485 A CN 201110350485A CN 102382976 A CN102382976 A CN 102382976A
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Prior art keywords
chamber
slag
bed
air
boiling
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CN2011103504853A
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CN102382976B (en
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张元松
潘庆洋
邱红侠
顾广龙
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JIANYE QINGSONG GROUP CO Ltd
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JIANYE QINGSONG GROUP CO Ltd
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Abstract

The invention discloses a fluidized boiling roasting furnace. The fluidized boiling roasting furnace has high capacity and higher heat recovery efficiency, and does not directly convey the return air containing a large amount of ash to a hearth of the upper part. A slag outlet is connected with a slag overflow port through a heat exchange type rear chamber boiling bed; the heat exchange type rear chamber boiling bed comprises a rear chamber boiling bed body, an air chamber device and a heat exchange device; the rear chamber boiling bed body comprises a body with a hollow chamber, a slag inlet and a slag discharge hole; the air chamber device is arranged at the bottom of the body, and blows air into the chamber of the body; the heat exchange device comprises a cooling pipe bundle, and the cooling pipe bundle extends into the chamber of the body and is in full contact with the flowing slag in the chamber of the body; the slag discharge hole is connected with the slag overflow port; the slag inlet is connected with the slag outlet at the side of a boiling bed layer; and the slag inlet serves as an air flue for guiding the air in the rear chamber boiling bed body into the boiling bed layer. The fluidized boiling roasting furnace is fuller in combustion. The economic benefit and the utilization rate of heat are improved. The slag discharge temperature is greatly reduced. The fluidized boiling roasting furnace is compact in structure, small in floor area, simple and convenient in installation and safe in operation.

Description

A kind of fluidization fluidizing reactor
Technical field
The present invention relates to the fluidizing reactor of sulfurous iron ore, zinc ore concentrate roasting sulphuric acid plant; Relate in particular to this kind fluidizing reactor slag tap the part improvement.
Background technology
The fluidization fluidizing reactor is one of major equipment of sulfurous iron ore, zinc ore concentrate sulphuric acid plant calcining process, and the stove shape mainly contains two kinds on straight barrel type and top expansion type.The straight barrel type fluidizing reactor is used for the roasting in non-ferro metals floatation ore deposit more, and intensity of roasting is low, and the fluidizing furnace of top expansion type is used for the roasting of sulfurous iron ore mostly because of intensity of roasting, and China's most of ore deposit stoving oven belongs to this type.
Conventional fluidized bed roasting furnace body is that box hat liner insulating brick serves as a contrast firebrick structure (containing insulating brick liner 1, refractory brick liner 2) again.Like Fig. 6, shown in 7, whole body of heater can be divided into several parts, and top is burner hearth, comprises boiling bed 8, middle part expanding reach and upper furnace 7.Cooling water tank 9 is housed in the siege,, reduces the temperature of boiling bed 8 walls to remove the waste heat of boiling bed 8.The middle part is the conical section that upwards enlarges, and the area of the sectional area ratio boiling bed 8 of upper furnace 7 is big, takes out of with the minimizing solids to fall low gas velocity.The bottom is that wind box is a lower air chamber 3, is provided with air pipe 4, and is middle across a dispersion plate 5, on pour into a mould refractory concrete, be embedded with many dispersion plate blast caps 6.Body of heater also is provided with adapters such as charging opening 10, slag riser 11, furnace gas export 12, secondary air import 13, lighting-up tuyere 14, safety vent mouth 15 in addition.
The roasting process in ore deposit just carries out in burner hearth, and feeding machine is sent qualified ore deposit into fluidizing reactor, with the air boiling roasting that blower fan is sent here, and 850~950 ℃ of control fluidized layer temperatures.The about 920 ℃ of entering waste heat boilers cooling of fluidizing reactor Outlet Gas Temperature is also reclaimed heat, 900 ℃ of entering cooling systems of high temperature furnace slag that the fluidizing reactor riser is discharged.From the enterprise operation situation, many existence cause stopping because of fluidizing reactor dreg removing system fault.The reason of high fault mainly is:
1, discharges the slag temperature height, carry the stainless steel pipes material fragile;
2, fluidizing furnace riser and cooling apparatus distance, it is long to connect transport pipe, easy blocking;
3, the discontinuous cooling apparatus that causes of deslagging is uneven in temperature, and weld seam expands with heat and contract with cold easy to crack.
Frequent maintenance influences the driving rate of system, and maintenance has increased system operation cost, and there is potential safety hazard in system's long-period stable operation.See from resource and environmental angle in addition, also have following problem:
1, thermosteresis is big, and the cooling of 900 ℃ of slags to be adopted about spray coolings to 400 ℃ and see off, and slag heat does not reclaim, and has caused energy dissipation.
2, the cooling deslagging need consume a large amount of water, and production environment is polluted.
3, operation link is many, relates to deslagging, conveying, trickle cooling, blowdown adjusting, and technology and control are complicated.
The application for a patent for invention file that the disclosed publication number of the 1998.10.18. of State Intellectual Property Office " CN1197179A ", name are called " directly blowing bubbling furance slag after heat recovering method and system thereof " discloses a kind of air cooling slag that utilizes, and it is combustion-supporting to reclaim the method for afterheat of slags to be sent into fluidizing furnace by the hot blast after the slag heating.Concrete technique means is: make that to flow into slag from the slag of the liquid bed discharging of fluidizing furnace cooling bed; The freezing air cooling bed with blasting slag carries out heat exchange; Its characteristics are the warm air after the slag heating is introduced stove from the suspension section of fluidizing furnace, as the required combustion air of fluidizing furnace secondary combustion.
The direct blast type fluidizing furnace afterheat of slags recovery system that designs according to above-mentioned direct blowing bubbling furance slag after heat recovering method combines with fluidizing furnace.Fluidizing furnace is made up of liquid bed, suspension section, air compartment, convection tubes, back-end surfaces and fan etc. usually; The principal feature of native system is to adopt multi-cell fluidized bed cooling bed as slag; Multi-cell fluidized bed comprises lathe bed, air distribution plate and windy chamber air inlet structure, has into cinder notch, slag-drip opening and air outlet its air distribution plate level or be obliquely installed on the lathe bed; Be separated into dividing plate in the lathe bed on the air distribution plate and be no less than 3 chamber; Bottom, each chamber communicates, then have under the air distribution plate with lathe bed in the corresponding the same number of air compartment in chamber, be blast inlet under the air compartment.It is gone into cinder notch and links to each other with the overflow slag seepage flow mouth on liquid bed top and the cold slag vent pipe of liquid bed bottom respectively through the slag transport pipe; Blast inlet is linked fan through the cold wind transport pipe, and air outlet is then linked the hot blast that is positioned at the fluidizing furnace suspension section through the hot blast conveying pipe road and gone into fire door.Said hot blast is gone into the negative pressuren zone that fire door is positioned at the fluidizing furnace suspension section.
In recent years, along with modernization is industrial towards large-scale development, the scale of fluidizing furnace from ten thousand tons/year of 1-5 in one's early years, develops into ten thousand tons/year of 10-50 of today.Above-mentioned patented technology means are drawn stove with slag and are adopted air cooling can't adapt to the demand of present processing industry outward, in case slag flow, flow velocity increase, can't obtain the slag temperature that this article claims at slag notch and be reduced to 50 ℃ by 900 ℃.Even and if the requirement claimed by this article of its fluidizing velocity (1-3m/s), air quantity is implemented in practice, its tapping temperature also is difficult to reach 50 ℃.And adopt the mode in slag, return air shunting in this article, the return air that contains a large amount of ash directly gets into upper furnace, can have a negative impact to integral body processing.
Summary of the invention
The present invention is directed to above-mentioned defective, provide a kind of production capacity big, recovery of heat usefulness is higher, and the return air that will not contain a large amount of ash is directly sent into the fluidization fluidizing reactor of upper furnace.
Technical scheme of the present invention is: said body of heater comprises lower air chamber, boiling bed, expanding reach, upper straight section and top cover from the bottom to top; Between said boiling bed and lower air chamber, be provided with dispersion plate, be provided with slag notch at the side of said boiling bed, said slag notch lower edge height is higher than said dispersion plate plate face height; Outside body of heater, be provided with the slag riser, said slag notch and said slag riser through heat exchange type after the chamber liquid bed link to each other;
The chamber liquid bed comprises chamber, back liquid bed body, air compartment device and heat exchanger behind the said heat exchange type;
Chamber, said back liquid bed body comprises body, slag inlet and the slag-drip opening with hollow chamber;
Said air compartment device is located at the bottom of said body, to the chamber interior air blast of body;
Said heat exchanger comprises cooling tube bundle, and said cooling tube bundle stretches into the chamber interior of said body, fully contacts with the mobile slag of the chamber interior of said body;
Said slag-drip opening connects said slag riser;
Said slag inlet connects the slag notch of said boiling bed side; And said slag inlet double as is inducted into the air channel in the said boiling bed with the intravital wind of said back chamber liquid bed.
The inwall of said boiling bed is provided with cooling water tank, and said heat exchanger is connected with said cooling water tank.
Said slag inlet lower edge is provided with the slope at the outer high interior end, will be imported in the said boiling bed by the wind that liquid bed body bottom, chamber, back air compartment device bloats.
The height of said slag inlet lower edge is higher than the height of said slag-drip opening lower edge.
The outer face of liquid bed body is provided with and handles door in chamber, said back.
Said air compartment device comprises air compartment and blast cap, and said air compartment is fixedly connected on the bottom of chamber, said back liquid bed body base plate, and said blast cap is fixedly connected on the base plate of chamber, said back liquid bed body.
Chamber, said back liquid bed body is made up of inner steel lining insulating brick and heat-resisting mould material.
The intrinsic slag-drip opening of chamber, the said back liquid bed outside is provided with deslagging chamber, and said deslagging chamber connects said slag riser.
The present invention with heat exchange type after the chamber liquid bed link to each other with furnace body and form an integral body.The slag of body of heater boiling bed flows directly into behind the heat exchange type in the liquid bed of chamber, and after the inflow, the cooling air of chamber liquid bed acts on slag from bottom to top behind the heat exchange type, makes slag in cooling, keep " boiling " state; And the slag of " boiling " can fully contact with the cooling tube bundle that is full of heat exchange medium and carry out heat exchange; Cooling air is heated in to the slag effect, and from the reverse infiltration furnace charge of slag notch (slag inlet of chamber liquid bed behind the heat exchange type) of body of heater boiling bed, ash wherein can be absorbed by furnace charge, and can make burning more abundant through the cold wind of preheating.
Advantage of the present invention is: 1) air inlet of HRU directly gets into stoving oven as secondary air before expanding reach, makes burning more abundant.2) slag obtains high Fe contained scum etc. through the secondary air fluidized bed roasting, has improved economic benefit.3) heat of slags of cooling tube bundle recovery produces MP steam (3.82MPa, 256 ℃), improves HU.4) tapping temperature reduces (480-520 ℃) greatly, has alleviated the operating requirement of dreg removing system.5) compact construction, little, the simple installation of floor space, operational safety.
Description of drawings
Fig. 1 is a structural representation of the present invention,
Fig. 2 is the structural representation of heat-energy recovering apparatus among the present invention,
Fig. 3 is an A-A sectional view among Fig. 1,
Fig. 4 is the structural representation of cooling tube bundle in the heat-energy recovering apparatus of the present invention,
Fig. 5 is the vertical view of Fig. 4,
Fig. 6 is the structural representation of background technology of the present invention,
Fig. 7 is a B-B sectional view among Fig. 6;
1 is the insulating brick liner among the figure; 2 is the refractory brick liner; 3 is lower air chamber; 4 is the air pipe; 5 is dispersion plate; 6 is the dispersion plate blast cap; 7 is upper furnace; 8 are the boiling bed; The 81st, slag notch; 9 is cooling water tank; 10 is charging opening; 11 is the slag riser; 12 is furnace gas export; 13 is the secondary air import; 14 is lighting-up tuyere; 15 is the safety vent mouth; 16 is chamber, back liquid bed body; The 161st, the slag inlet lower edge; 162 slag-drip opening lower edges; 17 is fire-resistant inwall; 18 is air compartment; 19 is inlet mouth; 20 is dispersion plate; 21 is blast cap; 22 is cooling tube bundle; 23 is deslagging chamber; 24 for handling door; The 25th, cleaning door.
Embodiment
The present invention is shown in Fig. 1-5, and said body of heater comprises lower air chamber 3, boiling bed 8, expanding reach (being upper furnace 7), upper straight section and top cover (establishing safety vent mouth 15 on the top cover) from the bottom to top; Between said boiling bed 8 and lower air chamber 3, be provided with dispersion plate 5, be provided with slag notch 81 at the side of said boiling bed 8, said slag notch lower edge 82 highly is higher than said dispersion plate 5 plate face height; Outside body of heater, be provided with slag riser 11, said slag notch 81 links to each other through chamber liquid bed behind the heat exchange type with said slag riser 11;
The chamber liquid bed comprises chamber, back liquid bed body, air compartment device and heat exchanger behind the said heat exchange type;
Chamber, said back liquid bed body comprises body 16, slag inlet and the slag-drip opening with hollow chamber;
Said air compartment device is located at the bottom of said body 16, to the chamber interior air blast of body 16;
Said heat exchanger comprises cooling tube bundle 22, and said cooling tube bundle 22 stretches into the chamber interior of said body 16, fully contacts with the mobile slag of the chamber interior of said body 16;
Said slag-drip opening connects said slag riser 11;
Said slag inlet connects the slag notch 81 of said boiling bed side; And said slag inlet 81 double as are inducted into the air channel in the said boiling bed 8 with the intravital wind of said back chamber liquid bed.
The inwall of said boiling bed 8 is provided with cooling water tank 9, and said heat exchanger is connected with said cooling water tank 9 by said body of heater is outside.
Said slag inlet lower edge 161 is provided with the slope at the outer high interior end, will be imported in the said boiling bed 8 by the wind that chamber, back liquid bed body 16 bottom air compartment devices bloat.
The height of said slag inlet lower edge 161 is higher than the height of said slag-drip opening lower edge 162.Be beneficial to the discharge of slag.
The outer face of liquid bed body 16 is provided with and handles door 24 in chamber, said back.Two sides are respectively equipped with cleaning door 25.Be convenient to liquid bed body 16 inside, chamber, back are cleared up fully.
Said air compartment device comprises air compartment 18 and blast cap 21, and said air compartment 18 is fixedly connected on the bottom of chamber, said back liquid bed body 16 base plates, and said blast cap 21 is fixedly connected on the base plate of chamber, said back liquid bed body 16.
Chamber, said back liquid bed body 16 is made up of inner steel lining insulating brick and heat-resisting mould material.Make chamber, back liquid bed body 16 have fire-resistant inwall 17.
The slag-drip opening place of chamber, said back liquid bed body 16 is provided with deslagging chamber 23, and said deslagging chamber 23 connects said slag riser 11.
The present invention unites two into one warm sludge cooling, handling equipment and body of heater, has both reclaimed the warm sludge heat, has solved high temperature warm sludge conveying material rapid wear problem, has simplified technical process.At the device that the liquid bed slag notch of conventional fluidizing reactor is provided with slag cooling, heat recuperation and slags tap, this device integral body of formation that links to each other with furnace body.HRU comprises air compartment, gas distribution grid, refrigerating unit (being heat exchanger), dreg discharging box (i.e. chamber, back liquid bed body 16), the deslagging chamber of deslagging chamber and handles door etc.The warm sludge that fluidizing reactor is discharged carries out secondary boiling cooling in the liquid bed body of chamber, back.Stokehold blower fan institute send air passes through air compartment and gets into, and after grid distributor and the intensification of warm sludge boiling bed, gets into stoving oven, and the secondary air entering flue gas system as stoving oven has reclaimed heat of slags indirectly.Carry out heat exchange through HRU cooling water tank and slag, control HRU bubbling bed temperature produces MP steam about 510 ℃, improve HU.
Pyrite-based sulfuric acid production device with 200,000 tons of/year sulfur-bearings 35% is an example, and fluidizing reactor is per hour discharged the about 10t of slag, reduces to 510 ℃ of calculating by slag from 900 ℃, per hour shifts out heat through calculating slag:
Q slag=10 * 1000 * (0.956 * 900-0.918 * 510)=3922200KJ/h
Atmosphere temperature rising to 510 ℃ heat requirement: Q sky=4900 KJ/h
Recyclable heat: Q=3922200-4900=3917300 KJ/h
Can produce 3.82MPa, 450 ℃ of MP steam 1.21t/h, a year increase steam production is 9680t, practices thrift the nearly 1100t of mark coal.
Slag temperature after heat exchange about 510 ℃ far below 900 ℃ of conventional slag temperatures, the cooling power of postorder residue extraction mechanism is required to reduce greatly, reduced equipment weld bond cracking possibility.While is as the part of fluidizing furnace; Liquid bed body in chamber is welded by the Q345 steel plate behind the HRU; Be followed successively by insulating brick, refractory castable etc. in the liquid bed body of back chamber; Cancel stainless steel warm sludge transfer lime and stainless steel water spray cooling apparatus, saved cost of manufacture, simple installation, safer in the operation.
Principle of work of the present invention is:
Air gets into fluidizing furnace by air pipe 4 and carries out roasting with the mineral aggregate that gets into fluidizing reactor through charging opening 10 at boiling bed 8; The roasting space 7 through top is after furnace gas export 12 gets into the waste heat boiler recovery waste heat, and roasting, cooled warm sludge get into the slag heat-energy recovering apparatus from slag riser 11.Air from the inlet mouth 19 of slag heat-energy recovering apparatus carries out the secondary fluidized bed roasting at back chamber liquid bed (back chamber liquid bed body 16 inner chambers) to warm sludge; The back of warm sludge and cooling tube bundle 22 heat exchange cooling simultaneously gets into deslagging chamber 23 and slags tap; This moment, slag temperature was about 510 ℃, and the warm air after the roasting gets into fluidizing reactor as secondary air through slag notch 81.
Liquid bed body in chamber adopts Q345 behind the fluidizing reactor of the present invention, back chamber liquid bed body liner insulating brick and refractory brick, and in order further to reclaim heat, the present invention reclaims the slag heat.

Claims (8)

1. fluidization fluidizing reactor, said body of heater comprise lower air chamber, boiling bed, expanding reach, upper straight section and top cover from the bottom to top; Between said boiling bed and lower air chamber, be provided with dispersion plate, be provided with slag notch at the side of said boiling bed, said slag notch lower edge height is higher than said dispersion plate plate face height; Outside body of heater, be provided with the slag riser, it is characterized in that, said slag notch and said slag riser through heat exchange type after the chamber liquid bed link to each other;
The chamber liquid bed comprises chamber, back liquid bed body, air compartment device and heat exchanger behind the said heat exchange type;
Chamber, said back liquid bed body comprises body, slag inlet and the slag-drip opening with hollow chamber;
Said air compartment device is located at the bottom of said body, to the chamber interior air blast of body;
Said heat exchanger comprises cooling tube bundle, and said cooling tube bundle stretches into the chamber interior of said body, fully contacts with the mobile slag of the chamber interior of said body;
Said slag-drip opening connects said slag riser;
Said slag inlet connects the slag notch of said boiling bed side; And said slag inlet double as is inducted into the air channel in the said boiling bed with the intravital wind of said back chamber liquid bed.
2. a kind of fluidization fluidizing reactor according to claim 1 is characterized in that the inwall of said boiling bed is provided with cooling water tank, and said heat exchanger is connected with said cooling water tank.
3. a kind of fluidization fluidizing reactor according to claim 1 is characterized in that, said slag inlet lower edge is provided with the slope at the outer high interior end, will be imported in the said boiling bed by the wind that liquid bed body bottom, chamber, back air compartment device bloats.
4. a kind of fluidization fluidizing reactor according to claim 1 is characterized in that the height of said slag inlet lower edge is higher than the height of said slag-drip opening lower edge.
5. a kind of fluidization fluidizing reactor according to claim 1 is characterized in that, the outer face of liquid bed body is provided with and handles door in chamber, said back.
6. a kind of fluidization fluidizing reactor according to claim 1; It is characterized in that; Said air compartment device comprises air compartment and blast cap, and said air compartment is fixedly connected on the bottom of chamber, said back liquid bed body base plate, and said blast cap is fixedly connected on the base plate of chamber, said back liquid bed body.
7. a kind of fluidization fluidizing reactor according to claim 1 is characterized in that, chamber, said back liquid bed body is made up of inner steel lining insulating brick and heat-resisting mould material.
8. according to arbitrary described a kind of fluidization fluidizing reactor among the claim 1-7, it is characterized in that the intrinsic slag-drip opening of chamber, the said back liquid bed outside is provided with deslagging chamber, said deslagging chamber connects said slag riser.
CN 201110350485 2011-11-09 2011-11-09 Fluidized boiling roasting furnace Active CN102382976B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103759255A (en) * 2014-01-20 2014-04-30 苏州新区特氟龙塑料制品厂 Teflon fluidized bed furnace
CN106766906A (en) * 2016-11-30 2017-05-31 河池市技术开发中心 A kind of new concentrate fluidizing reactor furnace binding

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Publication number Priority date Publication date Assignee Title
US4548162A (en) * 1984-10-22 1985-10-22 Combustion Engineering, Inc. Slagging heat recovery unit with potassium seed recovery
JPS63216929A (en) * 1987-03-04 1988-09-09 Sumitomo Metal Ind Ltd Method for recovering waste heat from sintered ore cooling machine
CN1197179A (en) * 1997-04-18 1998-10-28 中国科学院广州能源研究所 Directly-blowing bubbling furance slag after heat recovering method and system thereof
JPH11181508A (en) * 1997-12-22 1999-07-06 Nippon Steel Corp Equipment for recovering heat in molten blast furnace slag
DE10115379C2 (en) * 2001-03-28 2003-07-17 Uhde Gmbh Process for the waste heat recovery of hot raw gases from a gasification plant operated with solid fuels and plant for carrying out the process
CN200955757Y (en) * 2006-09-10 2007-10-03 马应成 Furnace slag residual heat recovery device
KR20090036352A (en) * 2007-10-09 2009-04-14 재단법인 포항산업과학연구원 Apparatus for recycling heat of slag
CN201583137U (en) * 2009-12-08 2010-09-15 郴州丰越有色金属冶炼有限公司 Boiling-bed roaster
CN101963461A (en) * 2010-10-26 2011-02-02 瓮福(集团)有限责任公司 Pyrite cinder heat recovery method
CN202329114U (en) * 2011-11-09 2012-07-11 建业庆松集团有限公司 Fluidization fluidizing reactor

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4548162A (en) * 1984-10-22 1985-10-22 Combustion Engineering, Inc. Slagging heat recovery unit with potassium seed recovery
JPS63216929A (en) * 1987-03-04 1988-09-09 Sumitomo Metal Ind Ltd Method for recovering waste heat from sintered ore cooling machine
CN1197179A (en) * 1997-04-18 1998-10-28 中国科学院广州能源研究所 Directly-blowing bubbling furance slag after heat recovering method and system thereof
JPH11181508A (en) * 1997-12-22 1999-07-06 Nippon Steel Corp Equipment for recovering heat in molten blast furnace slag
DE10115379C2 (en) * 2001-03-28 2003-07-17 Uhde Gmbh Process for the waste heat recovery of hot raw gases from a gasification plant operated with solid fuels and plant for carrying out the process
CN200955757Y (en) * 2006-09-10 2007-10-03 马应成 Furnace slag residual heat recovery device
KR20090036352A (en) * 2007-10-09 2009-04-14 재단법인 포항산업과학연구원 Apparatus for recycling heat of slag
CN201583137U (en) * 2009-12-08 2010-09-15 郴州丰越有色金属冶炼有限公司 Boiling-bed roaster
CN101963461A (en) * 2010-10-26 2011-02-02 瓮福(集团)有限责任公司 Pyrite cinder heat recovery method
CN202329114U (en) * 2011-11-09 2012-07-11 建业庆松集团有限公司 Fluidization fluidizing reactor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103759255A (en) * 2014-01-20 2014-04-30 苏州新区特氟龙塑料制品厂 Teflon fluidized bed furnace
CN106766906A (en) * 2016-11-30 2017-05-31 河池市技术开发中心 A kind of new concentrate fluidizing reactor furnace binding

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