CN1737479A - High temperature indirect calcining kiln - Google Patents
High temperature indirect calcining kiln Download PDFInfo
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- CN1737479A CN1737479A CN 200510093602 CN200510093602A CN1737479A CN 1737479 A CN1737479 A CN 1737479A CN 200510093602 CN200510093602 CN 200510093602 CN 200510093602 A CN200510093602 A CN 200510093602A CN 1737479 A CN1737479 A CN 1737479A
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Abstract
This invention discloses a high-temperature indirect calcining kiln, which comprises the main gear, kiln body and the burning system connecting with the lower of the kiln; wherein inside the kiln body it sets the feeding and mixing mechanism, bin, rotary kiln tubular and tail cup from front to rear, and the rotary kiln tubular is inside the kiln body and extend to the kiln; the intake of the rotary kiln tubular is connected with the outlet of the bin, and the outlet of the rotary kiln tubular is connected with the tail cup; the main gear is set on the front or rear of the rotary kiln tubular; there is a conical ash bucket between the outlet of the bin and the inlet of the rotary kiln tubular, and a atmosphere adjusting device is set in the top of the conical ash bucket; several baffles are set in the rotary kiln tubular. Said kiln can increase the inner radiation of the tubular and the heat exchanging time; besides, it can save fuel 10%.
Description
Technical field
The present invention relates to a kind of calcining kiln, specifically relate to a kind of high temperature indirect calcining kiln, belong to the calciner of industry materials such as nonmetallic ore, metallic ore, chemical industry, agricultural.
Background technology
Indirect calcining kiln is normally according to the physicochemical property of raw mineral materials and the special-purpose kiln of calcining curve design, particularly at nonmetallic minerals such as kaolin, and agricultural residue, mineral coating, sewage sediment and chemical products etc. are incinerated, are decomposed, the kiln of dry, calcining and roasting.Present existing indirect calcination rotary kiln, the material of its cylinder of rotary kiln adopts only low temperature resistant material, cylinder of rotary kiln meeting flexural deformation when calcining heat is higher, therefore main drive can only be arranged at the interlude of cylinder of rotary kiln, when material moves to interlude in cylinder of rotary kiln, because its interlude temperature is lower, calcining heat is inhomogeneous in the cylinder of rotary kiln, badly influences the end product quality of material.In the patent No. is in the utility model patent of ZL01237607.8, the high temperature resistant degree material of a kind of employing inconel 601,602 is disclosed, main drive is arranged on the front end of cylinder of rotary kiln or the technical scheme of rear end, it is poor to preferably resolve cylinder of rotary kiln inner chamber material, resistance to elevated temperatures is bad, can not calcine problems such as expensive goods; But the uneven problem of calcining heat still exists, and the quality of its calcining materials is affected, and the scope of application is restricted.
At present, the cylinder of rotary kiln of existing indirect calcining kiln is logical being located in the kiln body, and its cylinder of rotary kiln inner chamber adopts the straight channel form usually, and combustion system is positioned at kiln body downside, and spread heat causes calcining inhomogeneous, badly influences the end product quality of material; Its two: because of its spread heat, also make calcination time long, calcination time reaches 60-90 minute, and calcination efficiency is low, and calcining output is little, and per hour the multipotency of feeding capacity reaches 1300 kilograms; The energy consumption height is calcined 1000 kilocalories of heats of 1 kilogram of product needed, has seriously restricted the development and use of nonmetallic minerals such as kaolin and to the treatment effect of agricultural residue, mineral coating, sewage sediment and chemical products etc. and utilize again.
Summary of the invention
Low for the calcining heat that solves existing indirect calcining kiln, calcining heat is inhomogeneous, time is long, efficient is low, defectives such as energy consumption height the purpose of this invention is to provide a kind of calcining heat in the kiln body, high temperature indirect calcining kiln that improves calcination efficiency and can lower consumption of improving.
To achieve these goals, calcining kiln of the present invention adopts technical scheme as follows: a kind of high temperature indirect calcining kiln, it comprises main drive, kiln body and the combustion system of joining with its underpart, and the kiln body is provided with feeding and rabbling mechanism, hopper, cylinder of rotary kiln and hood from front to back successively; Wherein, cylinder of rotary kiln is logical to be located at described kiln body and to extend this kiln body two ends, the entrance point of described cylinder of rotary kiln and described hopper outlet end join, and the port of export and the hood of cylinder of rotary kiln join, and described main drive is arranged at the front end or the rear end of this cylinder of rotary kiln; Its characteristics are: add a little ash bucket of taper between hopper outlet end and cylinder of rotary kiln entrance point, the top of the little ash bucket of this taper is provided with an atmosphere adjustment device; Described cylinder of rotary kiln is provided with a plurality of dividing plates in the chamber.
Above-mentioned atmosphere adjustment device is made up of a breather line, air content measuring apparatus, gas pressure gauge and air inlet adjustment valve; This air inlet adjustment valve is positioned at the air inlet end of this breather line, along its breather line air content measuring apparatus and gas pressure gauge is installed successively thereafter, and described breather line outlet side is communicated with the little ash bucket of described taper top; The gas that above-mentioned air inlet adjustment valve is advanced can be air, oxygen, chlorine or inert gas.
The air inlet of above-mentioned breather line and gas outlet are the right angle setting; Be connected with a curve between its air inlet pipe and the escape pipe, the air pump of described air inlet and peripheral hardware joins.
Above-mentioned dividing plate is a ring-type, and the periphery of its annular baffle is connected with described cylinder of rotary kiln inwall.
Being connected to grafting, being spirally connected or welding of above-mentioned toroidal membrane and described cylinder of rotary kiln inwall.
Above-mentioned toroidal membrane is provided with the 2-8 piece, and the spacing between its toroidal membrane and the toroidal membrane is the unequal interval setting.
Above-mentioned combustion system comprises the combustion chamber, and top of combustion chamber is along the logical combustion-aid air pipe that is provided with of its length direction, and lead to parallel with this combustion-aid air pipe of its bottom is provided with a main combustible pipe road; Be provided with several burners in the combustion chamber, several burners are separated into several burner hearths corresponding with it with the combustion chamber; Described burner upper end is connected by a tracheae and combustion-aid air pipe are vertical, and described burner lower end is connected with the main combustible pipe road is vertical by an ignitron road; Each burner one side is equipped with a ratio adjusting valve.
Above-mentioned combustion chamber, its bottom is parallel with this combustion-aid air pipe, and to lead to what establish can also be the main fuel pipeline.
Above-mentioned burner can be set to 3-12 according to the length that combustion system is provided with, and is spaced set between its burner and the burner;
Not plate of several horses can also be set in the above-mentioned burner hearth, and this horse not plate top is and the corresponding semi-circular recesses of cylinder of rotary kiln Lower Half shape that it is connected with the corresponding setting of described combustion chamber lower shape and with described combustion chamber inner wall sealing respectively on three limits down.
The present invention adopts technique scheme, its beneficial effect that has is as follows: 1, the present invention is according to the sintering curve of the fluid mechanics principle and the mineral of calcining, in cylinder of rotary kiln, be provided with the annular baffle that spacing does not wait, can effectively increase the gentle body heat of the interior radiation swap time of cylinder of rotary kiln, calcining heat is even, stable, easy to control; Improve the thermal efficiency, and capable of saving fuel more than 10%.2, be equipped with the little ash bucket of taper in the preceding rolling ring and the hopper joint of cylinder of rotary kiln, the little ash bucket of taper top is connected with an atmosphere adjustment device, atmosphere adjustment device is used to adjust the calcination atmosphere of different material, mix different gas, adjust what of gas consumption by atmosphere adjustment device, regulate the decomposition under oxidation or reducing atmosphere or the inert conditions, can reach the purpose of calcining different material optimum efficiency, in the calcining kiln of equal specification and condition, the output of material calcining can improve 30-40%, and energy consumption reduces 20-30%.3, burner of the present invention and kiln body are separated setting up and down, are the muffle calcining, because the thermal source of calcining does not directly contact with material, waste heat is clean hot-air, can make full use of, and energy savings can polluted product.4, combustion system is divided into some burner hearths by some burners with it, by the ratio adjusting valve of burner one side setting and the igniting pipeline of bottom setting, regulate the ratio and the temperature of burner burner oil, can also segmentation carry out temperature control, thereby the control calcining heat, regulate the calcining curve and realize that temperature controls automatically, its temperature adjusting scope ± 2 ℃.Can regulate control calcining heat, calcination atmosphere, calcination time neatly, adapt to the calcining requirement of various materials best.5, between kiln body and cylinder of rotary kiln, being connected all to adopt of control system, drive unit, feeding and the discharge system that kiln body and combustion system, cylinder of rotary kiln are connected with its two ends is tightly connected, make that can realize preventing dust in its body of heater inside, explosion-proof purpose, can calcine and reclaim poisonous and hazardous material, solvent.6, at high temperature use special cylinder of rotary kiln material, as use resistant to elevated temperatures Inconel material to make the cylinder of rotary kiln material, maximum operation (service) temperature can be above 1150 ℃, use the good zircon ceramic cellucotton that contains of heat-proof quality to make furnace lining, promptly alleviate the weight of body of heater, reduce again and hold heat release, accelerate the heating and cooling time, reduce the external wall temperature of kiln, reduce heat radiation.The height of two rear support legs that can be by adjusting the kiln body is adjusted kiln body inclination angle, adjusts the rotating speed of cylinder of rotary kiln by frequency control motor, thereby realizes the adjusting to calcination time.7 realize Automatic Control, guarantee continous-stable and the effective protection cylinder of rotary kiln produced.Add thermocouple at kiln body top, when Kiln Shell Temperature reaches the upper limit, report to the police.When reaching higher limit, thermocouple is sent signal, is sent in the computer control system of peripheral hardware, cuts off the power supply automatically by control program, closes all combustion systems.For preventing the hot-spot phenomenon, only heating system could be lighted a fire when cylinder of rotary kiln rotates.When cylinder of rotary kiln stopped the rotation, computer-controlled program was closed all heating systems automatically.Simultaneously can the EMER emergency generator, manual setter, in case have a power failure suddenly, guarantee the cylinder of rotary kiln rotation, with the protection cylinder of rotary kiln.8, burning gases can use natural gas, liquefied gas, coke-stove gas, producer gas, light diesel fuel etc.; Also can equip fuel oil, combustion gas two cover systems simultaneously.Small-sized kiln can make electricity consumption, and is applied widely, can improve existing high temperature indirect calcining kiln.
Description of drawings
Fig. 1 is a general structure schematic diagram of the present invention
Fig. 2 is a combustion system nozzle structure schematic diagram
Fig. 3 looks cross-sectional view for the right side of Fig. 2
Fig. 4 is the atmosphere adjustment device structural representation
Fig. 5 is the partial cutaway schematic of Fig. 1
The specific embodiment
As shown in Figure 1, high-temperature calcination purifying kiln of the present invention is made up of body of heater 1, combustion system 2, cylinder of rotary kiln 3, atmosphere adjustment device 4, hopper 5, rabbling mechanism 6, screw feed mechanism 7, preceding rolling ring 8, preceding carrying roller 9, back rolling ring 10, back carrying roller 11, drive unit 12, sprocket wheel 13, hood 14, discharge valve 15, hammer device 16.Wherein, body of heater 1 and combustion system 2 upper and lower settings; Cylinder of rotary kiln 3 is arranged in the body of heater 1, the two ends that cylinder of rotary kiln 3 extends body of heater 1 are provided with hammer device 16, be connected with preceding rolling ring 8 and back rolling ring 10 with cylinder of rotary kiln 3 two-port, the lower end of rolling ring 8 before preceding carrying roller 9 is positioned at, back carrying roller 11 is positioned at the lower end of back rolling ring 10, be arranged with sprocket wheel 13 in the back rolling ring 10, sprocket wheel 13 bottoms are connected with drive unit 12 by chain, and drive unit 12 drives cylinder of rotary kiln 3 by sprocket wheel 13 and rotates; Atmosphere adjustment device 4 adds by the little ash bucket of a taper to be located between hopper 5 and cylinder of rotary kiln 3 feed ends; Hopper 5 tops have charging aperture, and its middle part is provided with rabbling mechanism 6, and rabbling mechanism 6 is that a motor-driven agitator constitutes, and agitator puts in the hopper 5; The bottom of hopper 5 is provided with screw feed mechanism 7, and screw feed mechanism 7 is driven by a variable-frequency motor; Combustion system 2 is positioned at
The kiln frameThe below, the burner that is provided with by-pass valve control is installed in segmentation and be arranged at intervals with the burner mouth on it.
As Fig. 1, Fig. 2, shown in Figure 3, combustion system 2 is made up of the burner 23 of several burner hearths 21 and corresponding setting with it, the upper end of some burners 23 is communicated with a combustion-aid air pipe 22 by connecting line separately, and the lower end of burner 23 is communicated with main combustion gas (oil) pipeline 26 by igniting pipeline 25 separately; One side of burner 23 is provided with a ratio adjusting valve 24; Be provided with not plate 27 of some horses in the burner hearth 21, horse not plate 27 tops is the recessed semicircular arc of corresponding setting with cylinder of rotary kiln 3 bottoms, and the horse not bottom of plate 27 is a rectangle, and dual-side and base and burner hearth sidewall and bottom are affixed.
Burner 23 can be set to 3-12 according to the length of kiln body, and each burner 23 is positioned at a burner hearth 21, is equipped with a small combustion chamber in its burner 23, horse not plate 27 is used for cutting apart burner hearth 21, horse is the installation number of plate 27 not, generally according to the size setting of kiln body, is generally the 2-10 piece; A burner hearth 21 is separated into a plurality of combustion chambers, its objective is that difference and physical reaction temperature according to material realize the control of branch room temperature, control this indirectly when intensification, cooling of calcining purifying kiln and calcination product to temperature controlling, total system can realize manually and full-automatic two kinds of control modes that this gauge tap is installed on this kiln body switch board by a gauge tap.
As shown in Figure 4, atmosphere adjustment device 4 is by air inlet pipe 41, air content measuring apparatus 42, the gas pressure gauge 43 of the curved neck of band, and gas control valve 44 is formed; Gas control valve 44 is positioned at the air inlet of atmosphere adjustment device 4, along the position of the gas control valve 44 of its air inlet pipe 41 air content measuring apparatus 42 and gas pressure gauge 43 is installed successively, and the little ash bucket 17 of the gas outlet of air inlet pipe 41 and a taper joins; The structure that the little ash bucket 17 of taper is positioned at kiln frame top is a tubular, and the structure that is positioned at kiln frame bottom is the awl bucket shape, and the front side of the little ash bucket 17 of taper joins by the discharging opening of a connecting pipe road and hopper 5; Its rear side joins by a connecting pipe road and cylinder of rotary kiln 3 charging apertures, the effect of atmosphere adjustment device 4 is according to different materials, from multiple gases, select one and select the gas of adaptation for use, selected gas is inputed to air inlet pipe 41 porch of the curved neck of band by a valve switch device, detect tolerance content and the pressure that enters atmosphere adjustment device 4 by air content measuring apparatus 42 and gas pressure gauge 43, switch by control gas control valve 44, mix flow, content and the pressure of gas in the controlled atmospher adjusting device 4, guarantee to calcine the quality of back product.
As shown in Figure 5, be provided with several dividing plates 31 in the cylinder of rotary kiln 3, dividing plate 31 is a ring-type, the inwall of the periphery of its annular baffle and cylinder of rotary kiln 3 joins, dividing plate 31 is separated into a plurality of inner chambers with cylinder of rotary kiln 3, be respectively the deshydroxy base, decarburization district or other organic district and material reaction district, cavity wall upper berth is provided with high temperature resistant kiln lining material in it, between each interior top of chamber that is separated out and kiln body 1 top, also be equipped with horse not plate 27 ' be semi-round ring shape, be fixed on the top of kiln body 1 in the mode of hanging or building by laying bricks or stones, not be crisscross arranged plate 27 positions with the horse of being fixed in kiln body bottom, its effect is to realize different temperature subregions according to the calcining curve of material.
The design of calcining kiln need be that technological parameters such as 30-120 minute, calcination atmosphere, calcining output are determined according to calcining heat 950-1200 ℃ of calcining materials, calcination time, be shaped to high temperature indirect calcining kiln of the present invention, the diameter of its cylinder of rotary kiln 3 is set to 310-2500mm, and heading-length is set to 2700-18000mm; According to the respective change of the different installation power of material, the scope that can regulate its thermal power is 200-3600kw.Wherein the front end of this kiln is owing to the endothermic reaction of material, so thermal power is wanted greatly, the rear end of calcining kiln is owing to the exothermic reaction of material, so thermal power is littler.
Of the present invention being of wide application, can incinerate following material, decompose, dry, calcining and roasting, its material comprises activated carbon, agricultural residue, alum, aluminum sulfate, barite, catalyst, cupric oxide, copper sulphate, red bauxite, diatomite, casting sand, industrial waste, iron oxide, iron chloride, kaolin, lime stone, magnesium chloride, magnesium hydroxide, mineral coating, sewage sediment, titanium dioxide, Raney nickel, nickel oxide, zinc ore and zircon sand.
Claims (10)
1, a kind of high temperature indirect calcining kiln, it comprises main drive, kiln body and the combustion system of joining with its underpart, the kiln body is provided with feeding and rabbling mechanism, hopper, cylinder of rotary kiln from front to back successively and covers end to end; Wherein, cylinder of rotary kiln is logical to be located at described kiln body and to extend this kiln body two ends, the entrance point of described cylinder of rotary kiln and described hopper outlet end join, and the port of export and the hood of cylinder of rotary kiln join, and described main drive is arranged at the front end or the rear end of this cylinder of rotary kiln; It is characterized in that: add a little ash bucket of taper between described hopper outlet end and the described cylinder of rotary kiln entrance point, the top of the little ash bucket of this taper is provided with an atmosphere adjustment device; Described cylinder of rotary kiln is provided with a plurality of dividing plates in the chamber.
2, high temperature indirect calcining kiln as claimed in claim 1, it is characterized in that: described atmosphere adjustment device is made up of a breather line, air content measuring apparatus, gas pressure gauge and air inlet adjustment valve, described air inlet adjustment valve is positioned at the air inlet end of this breather line, thereafter along breather line air content measuring apparatus and gas pressure gauge are installed successively, described breather line gas outlet end is communicated with the little ash bucket of described taper top.
3, high temperature indirect calcining kiln atmosphere adjustment device as claimed in claim 2 is characterized in that: the air inlet of described breather line and gas outlet are the right angle setting; The air pump of described air inlet and peripheral hardware joins.
4, high temperature indirect calcining kiln as claimed in claim 1 is characterized in that: described dividing plate is a ring-type, and the periphery of its annular baffle is connected with described cylinder of rotary kiln inwall.
5, high temperature indirect calcining kiln as claimed in claim 4 is characterized in that: described dividing plate and described cylinder of rotary kiln inwall be connected to grafting.
6, high temperature indirect calcining kiln as claimed in claim 5 is characterized in that: described dividing plate is provided with the 2-8 piece, and the spacing between its dividing plate and the dividing plate is the unequal interval setting.
7, as claim 1 or 2 or 3 or 4 or 5 or 6 described high temperature indirect calcining kilns, it is characterized in that: described combustion system comprises the combustion chamber, top of combustion chamber is along the logical combustion-aid air pipe that is provided with of its length direction, and lead to parallel with this combustion-aid air pipe of its bottom is provided with a main combustible pipe road; Be provided with several burners in the combustion chamber, several burners are separated into several burner hearths corresponding with it with the combustion chamber; Described burner upper end is connected by a vent line and combustion-aid air pipe are vertical, and described burner lower end is connected with the main combustible pipe road is vertical by an ignitron road; Each burner one side is equipped with a ratio adjusting valve.
8, high temperature indirect calcining kiln as claimed in claim 7 is characterized in that: described burner is provided with 3-12, is uniformly-spaced setting between its burner and the burner; Be provided with not plate of several horses in the described burner hearth, this horse not plate top is and the corresponding semi-circular recesses of cylinder of rotary kiln Lower Half shape that it is connected with the corresponding setting of described combustion chamber lower shape and with described combustion chamber inner wall sealing respectively on three limits down.
9, as claim 1 or 2 or 3 or 4 or 5 or 6 described high temperature indirect calcining kilns, it is characterized in that: described combustion system comprises the combustion chamber, top of combustion chamber is along the logical combustion-aid air pipe that is provided with of its length direction, and lead to parallel with this combustion-aid air pipe of its bottom is provided with a main fuel pipeline; Be provided with several burners in the combustion chamber, several burners are separated into several burner hearths corresponding with it with the combustion chamber; Described burner upper end is connected by a vent line and combustion-aid air pipe are vertical, and described burner lower end is connected with the main fuel pipeline is vertical by an ignitron road; Each burner one side is equipped with a ratio adjusting valve.
10, high temperature indirect calcining kiln as claimed in claim 9 is characterized in that: described burner is provided with 3-12, is uniformly-spaced setting between its burner and the burner; Be provided with not plate of several horses in the described burner hearth, this horse not plate top is and the corresponding semi-circular recesses of cylinder of rotary kiln Lower Half shape that it is connected with the corresponding setting of described combustion chamber lower shape and with described combustion chamber inner wall sealing respectively on three limits down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100936027A CN100390484C (en) | 2005-08-31 | 2005-08-31 | High temperature indirect calcining kiln |
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| CNB2005100936027A CN100390484C (en) | 2005-08-31 | 2005-08-31 | High temperature indirect calcining kiln |
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| CN100390484C CN100390484C (en) | 2008-05-28 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105505416A (en) * | 2015-12-18 | 2016-04-20 | 江苏鼎新环保科技有限公司 | Zoned-temperature-control rotary continuous pyrolyzing and carbonizing device for biomass |
| CN105540665A (en) * | 2016-02-04 | 2016-05-04 | 株洲安特新材料科技有限公司 | High-temperature reaction furnace for producing sodium antimonate by sodium pyroantimonate dehydration |
| CN106705656A (en) * | 2017-01-20 | 2017-05-24 | 重庆鹏越科技发展有限公司 | Calcining kiln for titanium dioxide |
| CN109780857A (en) * | 2019-03-14 | 2019-05-21 | 金刚新材料股份有限公司 | A kind of revolution stove of sectional temperature adjustment |
| CN112524938A (en) * | 2020-12-30 | 2021-03-19 | 安徽旭晨保温材料有限公司 | Heating method for development of novel decorative material |
| CN114518028A (en) * | 2022-02-11 | 2022-05-20 | 株洲市三江建材机械制造有限公司 | Rotary kiln waste heat rapid drying system and control method |
| CN114893960A (en) * | 2022-04-27 | 2022-08-12 | 河南郑矿机器有限公司 | Gypsum calcining rotary kiln production line system |
Family Cites Families (4)
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| CN2209674Y (en) * | 1994-05-30 | 1995-10-11 | 白添中 | Rotary calcining kiln for continuous preparing light calcined magnesia with coal as fuel |
| JP3479626B2 (en) * | 1999-07-16 | 2003-12-15 | 三造環境エンジニアリング株式会社 | Multi-tube external heat kiln |
| CN2484535Y (en) * | 2001-04-27 | 2002-04-03 | 江阴市中立机械制造有限公司 | Self-controlled-interval type revolving kiln |
| CN2854472Y (en) * | 2005-08-31 | 2007-01-03 | 苏州中材非金属矿工业设计研究院有限公司 | High-temp indirect roasting kiln |
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2005
- 2005-08-31 CN CNB2005100936027A patent/CN100390484C/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105505416A (en) * | 2015-12-18 | 2016-04-20 | 江苏鼎新环保科技有限公司 | Zoned-temperature-control rotary continuous pyrolyzing and carbonizing device for biomass |
| CN105540665A (en) * | 2016-02-04 | 2016-05-04 | 株洲安特新材料科技有限公司 | High-temperature reaction furnace for producing sodium antimonate by sodium pyroantimonate dehydration |
| CN106705656A (en) * | 2017-01-20 | 2017-05-24 | 重庆鹏越科技发展有限公司 | Calcining kiln for titanium dioxide |
| CN109780857A (en) * | 2019-03-14 | 2019-05-21 | 金刚新材料股份有限公司 | A kind of revolution stove of sectional temperature adjustment |
| CN109780857B (en) * | 2019-03-14 | 2024-03-08 | 金刚新材料股份有限公司 | Rotary kiln capable of controlling temperature in sections |
| CN112524938A (en) * | 2020-12-30 | 2021-03-19 | 安徽旭晨保温材料有限公司 | Heating method for development of novel decorative material |
| CN114518028A (en) * | 2022-02-11 | 2022-05-20 | 株洲市三江建材机械制造有限公司 | Rotary kiln waste heat rapid drying system and control method |
| CN114893960A (en) * | 2022-04-27 | 2022-08-12 | 河南郑矿机器有限公司 | Gypsum calcining rotary kiln production line system |
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