CN205603449U - A melting furnace device for producing basalt rock wool have an energy -efficient environmental protection - Google Patents
A melting furnace device for producing basalt rock wool have an energy -efficient environmental protection Download PDFInfo
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- CN205603449U CN205603449U CN201620377068.6U CN201620377068U CN205603449U CN 205603449 U CN205603449 U CN 205603449U CN 201620377068 U CN201620377068 U CN 201620377068U CN 205603449 U CN205603449 U CN 205603449U
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- combustion air
- melting furnaces
- heat exchanger
- air heat
- mineral wool
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
The utility model discloses a melting furnace device for producing basalt rock wool have an energy -efficient environmental protection, including compounding device, material feeding unit, stokehold charging means, melting furnace, feed of fuel ware, combustor, combustion air heat exchanger, four roller centrifuge, collecting cotton device, curing oven and glue gun, material feeding unit's discharge gate is located the feed inlet top of stokehold charging means, and the discharge gate of stokehold charging means communicates with each other with the feed inlet of melting furnace, the export of feed of fuel ware and the fuel inlet of melting furnace intercommunication, the combustion air heat exchanger is connected with the kiln, and the combustor is located the tip of melting furnace, directly over the fuse -element discharge gate of melting furnace was located four roller centrifuge's feed inlet, the glue gun was connected around four centrifugal rollers of four roller centrifuge, and the feed inlet intercommunication of four roller centrifuge's one -tenth cotton region and the cotton device of collection collects the discharge gate of cotton device and the feed inlet intercommunication of curing oven. This kiln device is used for producing basalt fiber, and the cotton waste can all melt down recycles, has high efficiency, energy -conservation, environmental protection efficiency.
Description
Technical field
This utility model belongs to the preparation field of basaltic mineral wool, it particularly relates to a kind of melting furnaces device with high-efficient energy-saving environment friendly for producing basaltic mineral wool.
Technical background
The fundamental state policy of energy-saving and emission-reduction Yi Shi China development.According to statistics, the energy consumption of the current constructing operation of China accounts for the 30% of society's total energy consumption, and along with the continuous quickening of China's Urbanization Construction, city high rise building is on the increase, and the task of building thermal-insulation energy-saving is heavier.Mineral wool, glass cotton, rock-wool heat insulation plate are inorganic heat insulating fiber materials, meet country's requirement to architecture exterior wall insulating materials.But mineral wool is met rainwater and is easily expanded, and causes heat-insulating property to be greatly lowered, in addition acidity coefficient relatively low (only 1.5～1.7), its mechanical property and chemical stability are poor, template is easily layered, and also has other many disadvantages, is not suitable for the exterior-wall heat insulation of skyscraper.Glass cotton is the most alkaline-resisting, and water absorption rate is higher, and mechanical property and chemical property, less than rock wool, are also unsuitable for for building exterior wall heat preserving.Basalt fibre is emerging environmental protection inorganic fibrous material, has the excellent properties such as high-strength light, high temperature resistant, resistant to corrosion, thermal acoustic insulation, has extensive use in fields such as space flight and aviation, automobile boats and ships, civil engineering traffic, wide market.Basaltic mineral wool has the features such as acidity coefficient height, good, high temperature resistant, the good heat preservation performance of mechanical property, and in building exterior wall heat preserving field, application is more and more wider.
Produce mineral wool at present or basaltic mineral wool is substantially and uses the mode of production of furnace cupola to produce, the Particle size requirements to raw material and fuel of this mode of production is higher, ordinary circumstance, the size controlling of raw material at 30-70mm, fuel coke size controlling at 60-120mm.Owing to fuel is coke, therefore containing higher sulfur dioxide, hydrogen sulfide, carbon monoxide, severe contamination air in the flue gas produced, smoke conveying duct is also had serious erosion.Wherein partial fume escapes into Factory Building and on-site, pollutes production operation environment, even can cause workman's carbon monoxide poisoning event.It addition, on-site is in addition to raw material silo, also needing to arrange coke warehouse, take bigger area, Chang Rong factory looks are poor.Although furnace cupola production technology has the motility closed down at any time according to sales situation, but furnace cupola will blowing out be carried out keeping in repair several days general every month, and production efficiency reduces, this its yield also having a strong impact on.Meanwhile, the waste cotton that the furnace cupola mode of production produces in process of production its more scabrous difficult problem especially.
Summary of the invention
Technical problem: technical problem to be solved in the utility model is: a kind of melting furnaces device for producing basaltic mineral wool is provided, this melting furnaces device is used for producing basaltic mineral wool, multiple canned, pipeline conveying fuel can be used, waste cotton can all melt down recycling, has efficient, energy-saving and environmental protection effect.
Technical scheme: for solving above-mentioned technical problem, the technical solution adopted in the utility model is:
A kind of melting furnaces device with high-efficient energy-saving environment friendly for producing basaltic mineral wool, this melting furnaces device includes mixing device, pay-off, stokehold feeder, melting furnaces, fuel conveyor, burner, combustion air heat exchanger, four roller centrifuges, compacting devices, curing oven and binder spray, wherein, the discharging opening of mixing device is positioned at above the charging aperture of pay-off, the discharging opening of pay-off is positioned at above the charging aperture of stokehold feeder, and the discharging opening of stokehold feeder communicates with the charging aperture of melting furnaces；The outlet of fuel conveyor connects with the fuel inlet of melting furnaces, and combustion air heat exchanger is connected with melting furnaces, and burner is positioned at the end of melting furnaces；The melt discharging opening of melting furnaces is positioned at directly over the charging aperture of four roller centrifuges, binder spray is connected to around four Centrifugal rollings of four roller centrifuges, the cotton region that becomes of four roller centrifuges connects with the charging aperture of compacting devices, and the discharging opening of compacting devices connects with the charging aperture of curing oven.
As preference, described combustion air heat exchanger and fuel conveyor are respectively two, during work, same combustion air heat exchanger is alternately passed through combustion air and waste gas, and at synchronization, one combustion air heat exchanger is passed through combustion air, another combustion air heat exchanger is passed through waste gas.
As preference, one end of described combustion air heat exchanger is provided with combustion air inlet and waste gas outlet, and the other end is provided with combustion air outlet and exhaust gas inlet.
As preference, the described waste gas outlet of combustion air heat exchanger connects with the gas access of curing oven.
As preference, the described melting furnaces device with high-efficient energy-saving environment friendly for producing basaltic mineral wool, also include the first transporter, reducing mechanism and the second transporter, first transporter is for being transported to the waste cotton produced in four roller centrifuges, compacting devices, curing oven work in reducing mechanism, and the outlet of reducing mechanism is connected by the import of the second transporter with mixing device or stokehold feeder.
As preference, the fuel of described fuel conveyor conveying is the one in natural gas, producer gas, coke-stove gas, heavy oil, residual oil, coal tar and petroleum coke.
As preference, described combustion air heat exchanger is made up of refractory material.
As preference, described refractory material is zirconium oxide, magnesia, chromium oxide matter, aoxidizes siliceous, high-alumina matter or clay material.
As preference, described stokehold feeder is to be positioned at least one pair of helix transporting device, and helix transporting device of melting furnaces both sides to be provided with chiller, and chiller is near the discharging opening of helix transporting device.
Beneficial effect: compared with prior art, the technical solution of the utility model has the advantages that this utility model uses melting furnace structure to generate basaltic mineral wool, and does not use Cupola Construction.This is conducive to improving the production efficiency of basaltic mineral wool, product quality and energy-conserving and environment-protective.The present embodiment use melting furnaces formula found melt, material road and discharging opening will not accumulation melt, more will not as furnace cupola furnace bottom produce molten iron, encrustation phenomena, the most also per blowing out in January once will not keep in repair as furnace cupola.Production efficiency the most of the present utility model is higher.The high-temp waste gas that in melting furnaces, fuel combustion produces is in combustion air heat exchanger, heat exchange is carried out with combustion air, make to enter the combustion air in melting furnaces and be warming up to close to the temperature in melting furnaces, it is more easy to reach glass melting temperature, being conducive to improving the efficiency of combustion of fuel in melting furnaces, this is that it has one of energy saving and environmental protection effect.Meanwhile, the low temperature waste gas (about 300 DEG C) of generation can be passed through curing oven, solidifies rock wool, saves the natural gas that substantial amounts of former furnace cupola uses at this process section, and this is its another energy saving and environmental protection effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model embodiment.
Figure has: mixing device 1, pay-off 2, stokehold feeder 3, melting furnaces 4, fuel conveyor 5, burner 6, combustion air heat exchanger 7, four roller centrifuge 8, compacting devices 9, curing oven 10, binder spray 11.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the technical scheme of this utility model embodiment is described in detail.
As shown in Figure 1, a kind of melting furnaces device with high-efficient energy-saving environment friendly for producing basaltic mineral wool of this utility model embodiment, including mixing device 1, pay-off 2, stokehold feeder 3, melting furnaces 4, fuel conveyor 5, burner 6, combustion air heat exchanger 7, four roller centrifuge 8, compacting devices 9, curing oven 10 and binder spray 11.The discharging opening of mixing device 1 is positioned at above the charging aperture of pay-off 2, and the discharging opening of pay-off 2 is positioned at above the charging aperture of stokehold feeder 3, and the discharging opening of stokehold feeder 3 communicates with the charging aperture of melting furnaces 4.The outlet of fuel conveyor 5 connects with the fuel inlet of melting furnaces 4, and combustion air heat exchanger 7 connects with melting furnaces 4, and burner 6 is positioned at the end of melting furnaces 4.As preferably, burner 6 is positioned at the end of melting furnaces 4.The abundant burning of fuel and combustion air, beneficially fuel and air is lighted in the bottom of melting furnaces 4.The melt discharging opening of melting furnaces 4 is positioned at directly over the charging aperture of four roller centrifuges 8.Binder spray 11 is connected to around four Centrifugal rollings of four roller centrifuges 8, and the cotton region that becomes of four roller centrifuges 8 connects with the charging aperture of compacting devices 9, and the discharging opening of compacting devices 9 connects with the charging aperture of curing oven 10.
It is respectively two as the preference of above-described embodiment, described combustion air heat exchanger 7 and fuel conveyor 5.Two combustion air heat exchangers 7 connect with melting furnaces 4 respectively with two fuel conveyors 5.One combustion air heat exchanger 7 and a fuel conveyor 5 are correspondingly arranged.During work, one end of combustion air heat exchanger 7 is used for being passed through combustion air, and the other end is used for connecting melting furnaces 4, carries waste gas.During work, same combustion air heat exchanger 7 is alternately passed through combustion air and waste gas, and at synchronization, a combustion air heat exchanger 7 is passed through combustion air, another combustion air heat exchanger 7 is passed through waste gas.When waste gas is discharged from melting furnaces 4, and it is high-temp waste gas, in entering combustion air heat exchanger 7, heat therein is sent in the wall of combustion air heat exchanger 7 by high-temp waste gas so that combustion air heat exchanger 7 have accumulated heat.When being passed through the combustion air of room temperature, combustion air absorbs heat from combustion air heat exchanger 7 so that combustion air temperature raises.Owing to the ignition temperature in melting furnaces 4 reaches as high as more than 1650 DEG C, so in combustion air heat exchanger 7, after combustion air is heated so that the temperature after combustion air heats up is more easy to reach glass melting temperature, be conducive to improving the efficiency of combustion of fuel in melting furnaces, there is energy-saving effect.
As preference, one end of described combustion air heat exchanger 7 is provided with combustion air inlet and waste gas outlet, and the other end is provided with combustion air outlet and exhaust gas inlet.The combustion air outlet of combustion air heat exchanger 7 and exhaust gas inlet are connected with melting furnaces 4 respectively.In same combustion air heat exchanger 7, it is provided with a passage.Waste gas and combustion air share this passage.When discharging waste gas from melting furnaces 4, close combustion air inlet and combustion air outlet.When being passed through combustion air in melting furnaces 4, close exhaust gas inlet and waste gas outlet.
Above-described embodiment uses melting furnace structure to generate basaltic mineral wool, and does not use Cupola Construction.This is conducive to improving the production efficiency of basaltic mineral wool, product quality and energy-conserving and environment-protective.Specifically, this utility model embodiment uses the mode of production of melting furnaces to produce basaltic mineral wool, its production technology is: first in mixing device 1, raw material is mixed, raw material mainly includes the inorganic mineral raw material such as basalt ore, dolomite, is transmitted to stokehold feeder 3 by pay-off 2 by mixed raw material.According to production requirement, control the material quantity that stokehold feeder 3 adds in melting furnaces 4.Raw material can be continuously uniformly added in melting furnaces 4 by stokehold feeder 3.Extraneous combustion air, by after combustion air heat exchanger 7 heat exchange, enters in melting furnaces 4.Fuel is inputted in melting furnaces 4 by fuel conveyor 5.Enter the air in melting furnaces 4 and fuel combustion, produce the raw materials such as high temperature, heating basalt ore, reach as high as more than 1650 DEG C, thus melt the raw material in melting furnaces 4, generate basalt liquation.The high-temp waste gas produced after air and fuel combustion, is passed through in combustion air heat exchanger 7 by the outlet of melting furnaces 4.
High temperature basalt liquation after fusing, through the melt discharging opening of melting furnaces 4, flows on the first roller of four roller centrifuges 8, starts system cotton.Four roller centrifuges 8 by high temperature basalt liquation under high speed centrifugation power effect, get rid of and make basaltic mineral wool, the binder spray 11 being simultaneously attached to around four roller centrifuges carries out glue spraying to basaltic mineral wool, pass through high-pressure blast, it is blown into compacting devices 9, the basaltic mineral wool having sprayed glue is collected by recycling compacting devices 9, and finally utilizing curing oven 10 is cotton plate by basaltic mineral wool curing molding.
In the above-described embodiments, the waste gas outlet of described combustion air heat exchanger 7 connects with the gas access of curing oven 10.Combustion air heat exchanger 7 comprises shared exhaust steam passage and combustion air passage.The high-temp waste gas flowed out from melting furnaces 4, flows out from combustion air heat exchanger 7, becomes low temperature waste gas, but remain above ambient temperature.When basaltic mineral wool is solidified by curing oven 10, need the air-flow utilizing temperature higher, and the EGT flowed out from the waste gas outlet of combustion air heat exchanger 7 can meet this requirement.Therefore, the waste gas outlet of combustion air heat exchanger 7 is connected with the gas access of curing oven 10, utilize the high temperature of waste gas that the basaltic mineral wool in curing oven 10 is heated, it is achieved that to the Waste Heat Reuse in waste gas, beneficially energy-conserving and environment-protective.The waste gas that gas outlet from curing oven 10 flows out flows to the external world through processing.
The improvement project of above-described embodiment, described melting furnaces device also includes the first transporter, reducing mechanism and the second transporter, the waste cotton that first transporter produces in four roller centrifuges 8, compacting devices 9, curing oven 10 being worked is transported in reducing mechanism, and the outlet of reducing mechanism is connected by the import of the second transporter with mixing device 1 or stokehold feeder 3.In becoming cotton, solidification, shear history, unavoidably having part rock wool and hang down on a production line, the rock wool scaled off with bead cutter is the most all included into waste cotton product line.For furnace cupola production technology, this kind of waste cotton cannot rationally process, and the present embodiment arranges the first transporter, reducing mechanism and the second transporter, the waste material produced in cotton, solidification, shear history will be become to be sent in mixing device 1 or stokehold feeder 3 after pulverizing, then rejoin heating in melting furnaces 4 by mixing device 1 or stokehold feeder 3.So, during whole generation, it is achieved that the re-using of waste material, all round process does not has solid waste discharge.Cannot re-use relative to the solid waste produced in prior art, this embodiment is conducive to energy-conserving and environment-protective.
As preference, described stokehold feeder 3 is to be provided with chiller at least one pair of helix transporting device being positioned at melting furnaces 4 both sides, and helix transporting device, and chiller is near the discharging opening of helix transporting device.Owing to helix transporting device usually metal is made, and temperature is higher in melting furnaces 4, for avoiding helix transporting device near one end of melting furnaces 4 by high temperature deformation, the discharging opening at helix transporting device arranges chiller so that helix transporting device is unlikely to deform damage near one end of melting furnaces 4.
The fuel that in prior art, furnace cupola utilizes is coke, and in the present embodiment, preferred fuel is the one in natural gas, producer gas, coke-stove gas, heavy oil, residual oil, coal tar and petroleum coke.This preference can use pluralities of fuel, less demanding to fuel and raw material particle size, and thin person is preferable for particle diameter.Fuel can be solid-state, gaseous state or liquid.These fuel stores, conveying is convenient, due to for gaseous state and liquid, it is not necessary to take excessive place and store., the waste gas produced after these fuel combustions discharges without the toxic gas such as carbon monoxide, sulfur dioxide meanwhile, pollution-free to production environment.
As the preference of above-described embodiment, described combustion air heat exchanger 7 is made up of refractory material.As preferably, refractory material is zirconium oxide, magnesia, chromium oxide matter, aoxidizes siliceous, high-alumina matter or clay material.When carrying out heat exchange due to high-temp waste gas and combustion air, temperature is up to more than 1100 DEG C.If using metal material to be made combustion air heat exchanger 7, then heat exchanger works the most at such high temperatures, is easily damaged, and needs the most every year to change 13 times.And this preference, use refractory material high temperature resistant, erosion-resistant to make combustion air heat exchanger 7, work under the high temperature conditions, be also not easy to damage, it is not necessary to frequently change, generally can work continuously 5 10 years.
In above formula embodiment, owing to combustion air and fuel fully burn in melting furnaces 4, keeping the condition of high temperature in making melting furnaces 4, so that found the melt obtained abundant homogenizing in melting furnaces, so melt quality is high, the basaltic mineral wool quality obtained accordingly is the highest.Founding the uniformity of the high-temperature fusant obtained through these melting furnaces and be significantly better than the melt of cupola melting, prepared basaltic mineral wool quality is higher.
The present embodiment uses melting furnaces formula to found melt, will not accumulation melt in material road and discharging opening, more as furnace cupola, molten iron, encrustation phenomena will not be produced at furnace bottom, can continuously produce, and also per blowing out in January will not keep in repair for 1-3 time as furnace cupola.The most of the present utility model highly efficient in productivity, in 20,000 tons of years of design year production capacity, actual production capacity is exactly 20,000 tons of years substantially.Compared with furnace cupola, the present embodiment melting furnaces carry out the production of rock wool, and production efficiency height, rock wool quality height, energy efficient, clean environment firendly, integrated cost reduce.
Of the present utility model ultimate principle, principal character and advantage have more than been shown and described.Those skilled in the art it should be recognized that; this utility model is not limited by above-mentioned specific embodiment; description in above-mentioned specific embodiment and description is intended merely to further illustrate principle of the present utility model; on the premise of without departing from this utility model spirit and scope; this utility model also has various changes and modifications, in the range of these changes and improvements both fall within claimed this utility model.The scope that this utility model claims is defined by claims and equivalent thereof.
Claims (8)
1. the melting furnaces device with high-efficient energy-saving environment friendly being used for producing basaltic mineral wool, it is characterized in that, this melting furnaces device includes mixing device (1), pay-off (2), stokehold feeder (3), melting furnaces (4), fuel conveyor (5), burner (6), combustion air heat exchanger (7), four roller centrifuges (8), compacting devices (9), curing oven (10) and binder spray (11), and described combustion air heat exchanger (7) is made up of refractory material；Wherein,
The discharging opening of mixing device (1) is positioned at above the charging aperture of pay-off (2), the discharging opening of pay-off (2) is positioned at above the charging aperture of stokehold feeder (3), and the discharging opening of stokehold feeder (3) communicates with the charging aperture of melting furnaces (4)；
The outlet of fuel conveyor (5) connects with the fuel inlet of melting furnaces (4), and combustion air heat exchanger (7) is connected with melting furnaces (4), and burner (6) is positioned at the end of melting furnaces (4)；The melt discharging opening of melting furnaces (4) is positioned at directly over the charging aperture of four roller centrifuges (8), binder spray (11) is connected to around four Centrifugal rollings of four roller centrifuges (8), the one-tenth cotton region of four roller centrifuges (8) connects with the charging aperture of compacting devices (9), and the discharging opening of compacting devices (9) connects with the charging aperture of curing oven (10).
2. according to the melting furnaces device with high-efficient energy-saving environment friendly for producing basaltic mineral wool described in claim 1, it is characterized in that, described combustion air heat exchanger (7) and fuel conveyor (5) are respectively two, during work, same combustion air heat exchanger (7) is alternately passed through combustion air and waste gas, and at synchronization, one combustion air heat exchanger (7) is passed through combustion air, another combustion air heat exchanger (7) is passed through waste gas.
3. according to the melting furnaces device with high-efficient energy-saving environment friendly for producing basaltic mineral wool described in claim 1, it is characterized in that, one end of described combustion air heat exchanger (7) is provided with combustion air inlet and waste gas outlet, and the other end is provided with combustion air outlet and exhaust gas inlet.
4. according to the melting furnaces device with high-efficient energy-saving environment friendly for producing basaltic mineral wool described in claim 3, it is characterised in that the waste gas outlet of described combustion air heat exchanger (7) connects with the gas access of curing oven (10).
5. according to the melting furnaces device with high-efficient energy-saving environment friendly for producing basaltic mineral wool described in claim 1, it is characterized in that, also include the first transporter, reducing mechanism and the second transporter, first transporter is for being transported to the waste cotton produced in four roller centrifuges (8), compacting devices (9), curing oven (10) work in reducing mechanism, and the outlet of reducing mechanism is connected by the import of the second transporter with mixing device (1) or stokehold feeder (3).
6. according to the melting furnaces device with high-efficient energy-saving environment friendly for producing basaltic mineral wool described in claim 1, it is characterized in that, the fuel that described fuel conveyor (5) carries is the one in natural gas, producer gas, coke-stove gas, heavy oil, residual oil, coal tar and petroleum coke.
7. according to the melting furnaces device with high-efficient energy-saving environment friendly for producing basaltic mineral wool described in claim 1, it is characterised in that described refractory material is zirconium oxide, magnesia, chromium oxide matter, aoxidizes siliceous, high-alumina matter or clay material.
8. according to the melting furnaces device with high-efficient energy-saving environment friendly for producing basaltic mineral wool described in claim 1, it is characterized in that, described stokehold feeder (3) is at least one pair of helix transporting device being positioned at melting furnaces (4) both sides, and helix transporting device is provided with chiller, chiller is near the discharging opening of helix transporting device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620377068.6U CN205603449U (en) | 2016-04-29 | 2016-04-29 | A melting furnace device for producing basalt rock wool have an energy -efficient environmental protection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620377068.6U CN205603449U (en) | 2016-04-29 | 2016-04-29 | A melting furnace device for producing basalt rock wool have an energy -efficient environmental protection |
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| CN205603449U true CN205603449U (en) | 2016-09-28 |
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| CN201620377068.6U Expired - Fee Related CN205603449U (en) | 2016-04-29 | 2016-04-29 | A melting furnace device for producing basalt rock wool have an energy -efficient environmental protection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105923987A (en) * | 2016-04-29 | 2016-09-07 | 杨凤义 | High-efficiency energy-saving environment-friendly melting furnace unit for production of basalt rock wool |
-
2016
- 2016-04-29 CN CN201620377068.6U patent/CN205603449U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105923987A (en) * | 2016-04-29 | 2016-09-07 | 杨凤义 | High-efficiency energy-saving environment-friendly melting furnace unit for production of basalt rock wool |
| CN105923987B (en) * | 2016-04-29 | 2019-03-08 | 杨凤义 | It is a kind of for producing the melting furnaces device with high-efficient energy-saving environment friendly of basaltic mineral wool |
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