CN110407476B - Rock/mineral wool product and preparation method thereof - Google Patents
Rock/mineral wool product and preparation method thereof Download PDFInfo
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- CN110407476B CN110407476B CN201910603592.9A CN201910603592A CN110407476B CN 110407476 B CN110407476 B CN 110407476B CN 201910603592 A CN201910603592 A CN 201910603592A CN 110407476 B CN110407476 B CN 110407476B
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/04—Manufacture of glass fibres or filaments by using centrifugal force, e.g. spinning through radial orifices; Construction of the spinner cups therefor
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
- C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
Abstract
The invention relates to a rock/mineral wool product and a method for the production thereof. The rock/mineral wool product mainly comprises the following components in parts by mass: siO (SiO) 2 35-55 parts of Al 2 O 3 9-18 parts of CaO, 8-16 parts of MgO, 11-20 parts of MnO1-2 parts of TFe 5-10 parts of K 2 O1-2 parts of modified acidity coefficient Mk of the rock/mineral wool product * 1.3-1.8, mk * =Wt%（SiO 2 +Al 2 O 3 ）/Wt%（CaO+MgO+MnO+TFe+K 2 O). The method provides a calculation method of the corrected acidity coefficient, wherein fly ash is added into ferronickel hot slag to adjust the corrected acidity coefficient, and when the Mk is * When the viscosity is 11-7 Pa.S, the corresponding temperature is 1380-1460 ℃, the temperature change rule is obvious, the interval is wider, the slag property is displayed, and the optimal proportion is achieved.
Description
Technical Field
The invention relates to a rock/mineral wool product and a method for the production thereof.
Background
The application relates to the field of energy conservation, environmental protection, decoration and sound absorption of buildings and industries, in particular to a method for producing rock (ore) cotton by adopting a sensible heat new one-step method by taking ferronickel hot slag as a raw material and taking fly ash as a conditioning material. The method specifically comprises the following steps: obtaining ferronickel hot slag and testing acidity coefficient and viscosity; tempering the ferronickel hot slag by using the fly ash in the tempering electric furnace, and changing the acidity coefficient and viscosity; and the regulated hot slag enters a discharge hole and enters a mineral wool production system to perform wire throwing to produce rock (mineral) wool. Compared with the prior art, the technology well utilizes the sensible heat of the hot slag, realizes sustainable utilization of resources and greatly reduces energy consumption, further reduces the production cost of rock (ore) cotton by taking fly ash as an auxiliary material, solves the problem of high auxiliary material transportation cost compared with basalt and quartz sand, and has the advantages of low cost, convenient material taking and maximum recycling of industrial solid waste.
At present, rock mineral wool production mainly comprises two processes: cupola process and sensible heat production process (new one-step process). The traditional cupola furnace technology adopts a method of remelting cold slag (blast furnace slag), and only when the temperature reaches above 1300 ℃, the flow rate is stable and the fluidity is good. While sensible heat of slag is wasted, the cold slag requires a large amount of coke in the melting process of the cupola furnace, which causes double waste of energy. The sensible heat method for producing mineral wool avoids the defects of cooling, crushing, screening and heating to melt into high-temperature melt in the traditional mineral wool process, and can fully utilize the hot slag to obviously realize the most reasonable utilization of energy.
The tax Law of environmental protection of the people's republic of China starts to be implemented in 2018. Under the supervision of new tax law, the cupola method for preparing rock mineral wool is gradually banned in the industry with high energy consumption and high pollution, the No. 44 file issued by the 2019 national innovation lists the treatment of nickel-iron slag as the object of solid waste important treatment, the mineral wool production technology can effectively produce blast furnace hot slag to directly produce mineral wool by utilizing the sensible heat of the nickel-iron slag, and the mineral wool production and the hot slag sensible heat recovery are combined to obtain mineral wool with low cost, low energy consumption and low pollution, so that win-win of mineral wool and metallurgical enterprises and sustainable development of resources and environment are realized.
Disclosure of Invention
The invention aims to solve the problems, and provides a rock/mineral wool product and a preparation method thereof, wherein fly ash is used as a conditioning material, the problem that high-quality mineral wool is difficult to successfully prepare after nickel-iron slag conditioning is solved, the modified acidity coefficient mk=1.5-1.6, when the viscosity of the conditioned nickel-iron hot slag is 10-1Pa S, the corresponding temperature is 1380-1460 ℃, the slag property is developed, the rock (mineral) cotton combustion performance prepared by adopting a sensible heat new one-step process meets the technical requirements of flat plate-shaped building materials and product A (A1) grade nonflammable materials (products) in the standard GB8624-2012, and the technical requirements of appearance, size, allowable deviation, dimensional stability, heat conductivity coefficient, slag ball content, mass moisture absorption rate, hydrophobic rate, short-term water immersion rate and acidity coefficient all meet the rock/mineral wool product GB/T25975-2010 rock wool board for building exterior wall insulation are adopted by the following technical scheme:
a rock/mineral wool product is characterized by mainly comprising the following components in parts by mass: 35-55 parts of SiO2, 3 9-18 parts of Al2O, 8-16 parts of CaO, 11-20 parts of MgO, 1-2 parts of MnO, 5-10 parts of TFe and 1-2 parts of K2O.
Preferably, the rock/mineral wool product mainly comprises the following components in parts by mass: 243-47 parts of SiO, 313-17 parts of Al2O, 10-15 parts of CaO, 13-18 parts of MgO, 1-2 parts of MnO, 5-8 parts of TFe and 1-2 parts of K2O.
Preferably, the modified acidity coefficient Mk of the rock/mineral wool product is 1.3-1.8;
the calculation formula of the modified acidity coefficient Mk is as follows:
WSiO2 is the weight of SiO 2; WAl2O3 is the weight of Al2O 3; WCaO is the weight of CaO; WMgO is the weight of MgO; WMnO is the weight of MnO; WTFe is the weight of TFe; WK2O is the weight of K2O.
Preferably, the modified acidity factor Mk of the rock/mineral wool product is chosen to be 1.5-1.6.
A method of making the above-described rock/mineral wool product, characterized by: flowing hot slag into a quenching and tempering electric furnace through a ladle, adding fly ash quality-regulating materials, heating to 1350-1550 ℃, preserving heat and homogenizing for a certain time, preferably heating to 1380-1460 ℃, preserving heat and homogenizing for a certain time, flowing to a centrifugal machine, forming primary fibers through high-speed operation of the centrifugal machine, forming cotton felt on a cotton collecting machine through high-speed flame and blowing of a binder, entering a mineral cotton production line, heating, drying, pressing and forming in a curing furnace through pleating, cutting and packaging, and obtaining a rock cotton finished product.
Preferably, the ferronickel hot slag mainly comprises the following components in parts by mass: 42-52 parts of SiO2, 3 5-10 parts of Al2O, 2-7 parts of CaO, 25-35 parts of MgO, 5-15 parts of TFe, 1-2 parts of MnO, 0-1 part of K2O and less than 0.1 part of NiO.
Preferably, the fly ash quality-regulating material mainly comprises the following components in parts by mass: 45-55 parts of SiO2, 25-35 parts of Al2O3, 5-15 parts of CaO, 0-2 parts of MgO and 0-2 parts of K2O.
The beneficial effects of the invention are as follows: the newly proposed modified acidity coefficient and modified material (fly ash) have obvious product modification effect, the rock (mineral) cotton board is prepared by a new sensible heat one-step method, the combustion performance meets the technical requirements of flat plate-shaped building materials and products A (A1) grade nonflammable materials (products) in the standard GB8624-2012, and the appearance, the dimension and the allowable deviation, the dimensional stability, the heat conductivity coefficient, the slag ball content, the quality moisture absorption rate, the hydrophobicity, the short-term water immersion rate and the acidity coefficient all meet the technical requirements of rock/mineral cotton products GB/T25975-2010 rock cotton boards for building exterior wall heat preservation.
Drawings
FIG. 1 (1 a, 1b, 1c, 1d, 1 e) is a test report of example 4;
Detailed Description
The invention is further illustrated by the following examples:
example 1:
the rock (mineral) cotton product is characterized by mainly comprising the following components in parts by mass: 35-39 parts of SiO2, 3 9-13 parts of Al2O, 12-17 parts of CaO, 16-20 parts of MgO, 1-2 parts of MnO, 7-10 parts of TFe and 1-2 parts of K2O, wherein the corrected acidity coefficient Mk of the rock (mineral) cotton product is 1.3, and when the viscosity is 10-1 Pa.S, the corresponding temperature is 1320-1380 ℃, and the short slag property is displayed;
the calculation formula of the modified acidity coefficient Mk is as follows:
WSiO2 is the weight of SiO 2; WAl2O3 is the weight of Al2O 3; WCaO is the weight of CaO; WMgO is the weight of MgO; WMnO is the weight of MnO; WTFe is the weight of TFe; WK2O is the weight of K2O.
A method of making the above-described rock/mineral wool product, characterized by: the hot slag flows into a quenching and tempering electric furnace through a ladle, fly ash quality-adjusting materials are added, the temperature is kept for a certain period of time after the temperature is raised to 1350-1550 ℃, the mixture flows into a centrifugal machine, primary fibers are formed through high-speed operation of the centrifugal machine, cotton felts are formed on a cotton collecting machine through high-speed flame and binder blowing, the cotton felts enter a mineral wool production line, and rock (mineral) cotton finished products are obtained through pleating, pressing and the like, heating, drying, pressing, forming, cutting and packaging in a curing furnace.
Preferably, the ferronickel hot slag mainly comprises the following components in parts by mass: 42-52 parts of SiO2, 3 5-10 parts of Al2O, 2-7 parts of CaO, 25-35 parts of MgO, 5-15 parts of TFe, 1-2 parts of MnO, 0-1 part of K2O and less than 0.1 part of NiO.
Preferably, the fly ash quality-regulating material mainly comprises the following components in parts by mass: 45-55 parts of SiO2, 25-35 parts of Al2O3, 5-15 parts of CaO, 0-2 parts of MgO and 0-2 parts of K2O.
Example 2:
the rock (mineral) cotton product is characterized by mainly comprising the following components in parts by mass: 37-41 parts of SiO2, 10-14 parts of Al2O3, 11-16 parts of CaO, 15-19 parts of MgO, 1-2 parts of MnO, 6-9 parts of TFe and 1-2 parts of K2O, wherein the corrected acidity coefficient Mk of the rock (mineral) cotton product is 1.4, and when the viscosity is 10-1 Pa.S, the corresponding temperature is 1340-1400 ℃, and the short slag property is displayed;
the calculation formula of the modified acidity coefficient Mk is as follows:
WSiO2 is the weight of SiO 2; WAl2O3 is the weight of Al2O 3; WCaO is the weight of CaO; WMgO is the weight of MgO; WMnO is the weight of MnO; WTFe is the weight of TFe; WK2O is the weight of K2O.
A method of making the above-described rock/mineral wool product, characterized by: the hot slag flows into a quenching and tempering electric furnace through a ladle, fly ash quality-adjusting materials are added, the temperature is kept for a certain period of time after the temperature is raised to 1350-1550 ℃, the mixture flows into a centrifugal machine, primary fibers are formed through high-speed operation of the centrifugal machine, cotton felts are formed on a cotton collecting machine through high-speed flame and binder blowing, the cotton felts enter a mineral wool production line, and rock (mineral) cotton finished products are obtained through pleating, pressing and the like, heating, drying, pressing, forming, cutting and packaging in a curing furnace.
Preferably, the ferronickel hot slag mainly comprises the following components in parts by mass: 42-52 parts of SiO2, 3 5-10 parts of Al2O, 2-7 parts of CaO, 25-35 parts of MgO, 5-15 parts of TFe, 1-2 parts of MnO, 0-1 part of K2O and less than 0.1 part of NiO.
Preferably, the fly ash quality-regulating material mainly comprises the following components in parts by mass: 45-55 parts of SiO2, 25-35 parts of Al2O3, 5-15 parts of CaO, 0-2 parts of MgO and 0-2 parts of K2O.
Example 3:
the rock (mineral) cotton product is characterized by mainly comprising the following components in parts by mass: 39-43 parts of SiO2, 11-15 parts of Al2O3, 10-15 parts of CaO, 14-18 parts of MgO, 1-2 parts of MnO, 5-8 parts of TFe and 1-2 parts of K2O, wherein the corrected acidity coefficient Mk of the rock (mineral) cotton product is 1.5, and when the viscosity is 10-1 Pa.S, the corresponding temperature is 1350-1410 ℃, and the slag growth attribute is displayed;
the calculation formula of the modified acidity coefficient Mk is as follows:
WSiO2 is the weight of SiO 2; WAl2O3 is the weight of Al2O 3; WCaO is the weight of CaO; WMgO is the weight of MgO; WMnO is the weight of MnO; WTFe is the weight of TFe; WK2O is the weight of K2O.
A method of making the above-described rock/mineral wool product, characterized by: flowing hot slag into a quenching and tempering electric furnace through a ladle, adding fly ash quality-adjusting materials, heating to 11350-1550 ℃, preserving heat, homogenizing for a certain time, flowing to a centrifugal machine, forming primary fibers through high-speed operation of the centrifugal machine, forming cotton felts on a cotton collecting machine through high-speed flame and blowing of a binder, entering a mineral wool production line, heating, drying, pressing and forming in a curing furnace through pleating, pressing and the like, cutting and packaging, and obtaining a rock (mineral) wool finished product.
The change in melt tapping viscosity is mainly changed by the change in composition ratio (modified acidity coefficient) and melting temperature. The larger the acidity coefficient (or modified acidity coefficient), the larger the viscosity at the same temperature, and the higher the melting temperature, the lower the viscosity.
Preferably, the ferronickel hot slag mainly comprises the following components in parts by mass: 42-52 parts of SiO2, 3 5-10 parts of Al2O, 2-7 parts of CaO, 25-35 parts of MgO, 5-15 parts of TFe, 1-2 parts of MnO, 0-1 part of K2O and less than 0.1 part of NiO.
Preferably, the fly ash quality-regulating material mainly comprises the following components in parts by mass: 45-55 parts of SiO2, 25-35 parts of Al2O3, 5-15 parts of CaO, 0-2 parts of MgO and 0-2 parts of K2O.
Example 4:
the rock (mineral) cotton product is characterized by mainly comprising the following components in parts by mass: 43-47 parts of SiO2, 13-17 parts of Al2O3, 10-15 parts of CaO, 13-18 parts of MgO, 1-2 parts of MnO, 5-8 parts of TFe and 1-2 parts of K2O, wherein the modified acidity coefficient Mk of the rock (mineral) cotton product is 1.6, when the viscosity is 10-1 Pa.S, the corresponding temperature is 1360-1420 ℃, the slag property is displayed, the higher the modified acidity coefficient is, namely the higher the silicon-aluminum content is, the more stable the glass net structure is, the rock cotton quality is relatively higher, and the optimal proportion is achieved;
the calculation formula of the modified acidity coefficient Mk is as follows:
WSiO2 is the weight of SiO 2; WAl2O3 is the weight of Al2O 3; WCaO is the weight of CaO; WMgO is the weight of MgO; WMnO is the weight of MnO; WTFe is the weight of TFe; WK2O is the weight of K2O; the modified acidity coefficient Mk is changed by the ratio of the components.
The viscosity is changed mainly by the change of the component ratio (modified acidity coefficient) and the melting temperature. The larger the acidity coefficient (or modified acidity coefficient), the larger the viscosity at the same temperature, and the higher the melting temperature, the lower the viscosity.
A method of making the above-described rock/mineral wool product, characterized by: the hot slag flows into a quenching and tempering electric furnace through a ladle, fly ash quality-adjusting materials are added into the quenching and tempering electric furnace, the temperature is kept for a certain period of time after the temperature is raised to 1380-1460 ℃, the mixture flows into a centrifugal machine, primary fibers are formed through high-speed operation of the centrifugal machine, cotton felts are formed on a cotton collecting machine through high-speed flame and binder blowing, the cotton felts enter a mineral wool production line, and rock (mineral) cotton finished products are obtained through pleating, pressing and the like, heating, drying, pressing, forming, cutting and packaging in a curing furnace.
Preferably, the ferronickel hot slag mainly comprises the following components in parts by mass: 42-52 parts of SiO2, 3 5-10 parts of Al2O, 2-7 parts of CaO, 25-35 parts of MgO, 5-15 parts of TFe, 1-2 parts of MnO, 0-1 part of K2O and less than 0.1 part of NiO.
Preferably, the fly ash quality-regulating material mainly comprises the following components in parts by mass: 45-55 parts of SiO2, 25-35 parts of Al2O3, 5-15 parts of CaO, 0-2 parts of MgO and 0-2 parts of K2O.
Example 5:
the rock (mineral) cotton product is characterized by mainly comprising the following components in parts by mass: 46-50 parts of SiO2, 14-18 parts of Al2O3, 8-13 parts of CaO, 11-16 parts of MgO, 1-2 parts of MnO, 4-7 parts of TFe and 1-2 parts of K2O, wherein the corrected acidity coefficient Mk of the rock (mineral) cotton product is 1.7, and when the viscosity is 10-1 Pa.S, the corresponding temperature is 1440-1520 ℃, the short slag property is displayed, and the optimal proportion is achieved;
the calculation formula of the modified acidity coefficient Mk is as follows:
WSiO2 is the weight of SiO 2; WAl2O3 is the weight of Al2O 3; WCaO is the weight of CaO; WMgO is the weight of MgO; WMnO is the weight of MnO; WTFe is the weight of TFe; WK2O is the weight of K2O.
A method of making the above-described rock/mineral wool product, characterized by: flowing hot slag into a quenching and tempering electric furnace through a ladle, adding fly ash quality-adjusting materials, heating to 11350-1550 ℃, preserving heat, homogenizing for a certain time, flowing to a centrifugal machine, forming primary fibers through high-speed operation of the centrifugal machine, forming cotton felts on a cotton collecting machine through high-speed flame and blowing of a binder, entering a mineral wool production line, heating, drying, pressing and forming in a curing furnace through pleating, pressing and the like, cutting and packaging, and obtaining a rock (mineral) wool finished product.
Preferably, the ferronickel hot slag mainly comprises the following components in parts by mass: 42-52 parts of SiO2, 3 5-10 parts of Al2O, 2-7 parts of CaO, 25-35 parts of MgO, 5-15 parts of TFe, 1-2 parts of MnO, 0-1 part of K2O and less than 0.1 part of NiO.
Preferably, the fly ash quality-regulating material mainly comprises the following components in parts by mass: 45-55 parts of SiO2, 25-35 parts of Al2O3, 5-15 parts of CaO, 0-2 parts of MgO and 0-2 parts of K2O.
Example 6:
the rock (mineral) cotton product is characterized by mainly comprising the following components in parts by mass: 50-55 parts of SiO2, 14-18 parts of Al2O3, 8-13 parts of CaO, 11-16 parts of MgO, 1-2 parts of MnO, 2-5 parts of TFe and 1-2 parts of K2O, wherein the corrected acidity coefficient Mk of the rock (mineral) cotton product is 1.8, and when the viscosity is 10-1 Pa.S, the corresponding temperature is 1480-1550 ℃, the short slag attribute is displayed, and the optimal proportion is achieved;
the calculation formula of the modified acidity coefficient Mk is as follows:
WSiO2 is the weight of SiO 2; WAl2O3 is the weight of Al2O 3; WCaO is the weight of CaO; WMgO is the weight of MgO; WMnO is the weight of MnO; WTFe is the weight of TFe; WK2O is the weight of K2O.
A method of making the above-described rock/mineral wool product, characterized by: the hot slag flows into a quenching and tempering electric furnace through a ladle, fly ash quality-adjusting materials are added, the temperature is kept for a certain period of time after the temperature is raised to 1350-1550 ℃, the mixture flows into a centrifugal machine, primary fibers are formed through high-speed operation of the centrifugal machine, cotton felts are formed on a cotton collecting machine through high-speed flame and binder blowing, the cotton felts enter a mineral wool production line, and rock (mineral) cotton finished products are obtained through pleating, pressing and the like, heating, drying, pressing, forming, cutting and packaging in a curing furnace.
Preferably, the ferronickel hot slag mainly comprises the following components in parts by mass: 42-52 parts of SiO2, 3 5-10 parts of Al2O, 2-7 parts of CaO, 25-35 parts of MgO, 5-15 parts of TFe, 1-2 parts of MnO, 0-1 part of K2O and less than 0.1 part of NiO.
Preferably, the fly ash quality-regulating material mainly comprises the following components in parts by mass: 45-55 parts of SiO2, 25-35 parts of Al2O3, 5-15 parts of CaO, 0-2 parts of MgO and 0-2 parts of K2O.
The main reason when the viscosity range is 10 < -1 > Pa.S is that in the long-term industrialization process, the optimal tapping viscosity is in the range, the high and low values have great influence on the subsequent centrifugal machine blowing process and the quality of cotton, and in the general industrial production, the tapping viscosity is preferably controlled to be in the range of 10 < -1 > Pa.S.
While the fundamental and principal features of the invention and advantages of the invention have been shown and described, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (1)
1. A rock/mineral wool product characterized by: the composite material mainly comprises the following components in parts by mass: siO (SiO) 2 43-47 parts of Al 2 O 3 13-17 parts of CaO, 10-15 parts of MgO, 13-18 parts of MnO1-2 parts of TFe5-8 parts of K 2 O1-2 parts, wherein the corrected acidity coefficient Mk of the rock/mineral wool product is 1.6, and when the viscosity is 10 < -1 > Pa.S, the corresponding temperature is 1360-1420 ℃, and the slag growth property is displayed;
the calculation formula of the modified acidity coefficient Mk is as follows:
WSiO 2 is SiO 2 Is the weight of (2); WAl 2 O 3 Is Al 2 O 3 Is the weight of (2); WCaO is the weight of CaO; WMgO is the weight of MgO; WMnO is the weight of MnO; WTFe is the weight of TFe; WK (WK) 2 O is K 2 Weight of O;
the raw material ferronickel hot slag for preparing the rock/mineral wool product mainly comprises the following components in parts by mass: siO (SiO) 2 42-52 parts of Al 2 O 3 5-10 parts of CaO2-7 parts of MgO25-35 parts of TFe 5-15 parts of MnO1-2 parts of K 2 0-1 part of O, and less than 0.1 part of NiO;
the fly ash is used as a quality adjusting material, and the fly ash quality adjusting material mainly comprises the following components in parts by mass: siO (SiO) 2 45-55 parts of Al 2 O 3 25-35 parts of CaO, 5-15 parts of MgO, 0-2 parts of K 2 0-2 parts of O;
the preparation method of the rock/mineral wool product comprises the following steps:
the hot slag flows into a quenching and tempering electric furnace through a ladle, fly ash conditioning materials are added into the quenching and tempering electric furnace, the temperature is kept constant for homogenization for a certain time after the temperature is raised to 1380-1460 ℃, the mixture flows into a centrifugal machine, primary fibers are formed through high-speed operation of the centrifugal machine, cotton felts are formed on a cotton collecting machine through high-speed flame and binder blowing, the cotton felts enter a mineral wool production line, and the mineral wool products are obtained through pleating, pressing and the like, heating, drying, pressing, forming, cutting and packaging in a curing furnace.
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