CN112030350A - Method for producing rock wool by using coal gangue - Google Patents
Method for producing rock wool by using coal gangue Download PDFInfo
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- CN112030350A CN112030350A CN202010888175.6A CN202010888175A CN112030350A CN 112030350 A CN112030350 A CN 112030350A CN 202010888175 A CN202010888175 A CN 202010888175A CN 112030350 A CN112030350 A CN 112030350A
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4209—Inorganic fibres
-
- 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
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
- D04H1/60—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in dry state, e.g. thermo-activatable agents in solid or molten state, and heat being applied subsequently
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/002—Inorganic yarns or filaments
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/12—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with filaments or yarns secured together by chemical or thermo-activatable bonding agents, e.g. adhesives, applied or incorporated in liquid or solid form
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Building Environments (AREA)
Abstract
The invention relates to a method for producing rock wool by using coal gangue, belonging to the technical field of continuous fiber material production; the problems of high energy consumption and difficult realization of continuous production in rock wool production are solved; weighing 50-75 parts of coal gangue, 10-20 parts of slag, 8-15 parts of diatomite and 5-15 parts of kaolin according to parts by weight; calcining and melting the raw materials in a melting tank furnace to form magma; then centrifugally throwing the filaments, and spraying a binder to prepare fibers; the melting furnace comprises a calcining section and a melting pool, the melting pool comprises a front melting pool section and a rear melting pool section, a partition wall is arranged between the front melting pool section and the rear melting pool section, and the partition wall is provided with a discharge hole; the invention realizes the continuous production of rock wool, the melting tank kiln needs to be provided with excessive power devices, the materials are continuously calcined and melted along the production line by depending on the height difference of each working section and combining with the feeding device, the production process is more environment-friendly, and the integral operation cost is low.
Description
Technical Field
The invention belongs to the technical field of continuous fiber material production, and particularly relates to a method for producing rock wool by using coal gangue.
Background
At present, rock wool is mostly produced by using natural ores such as basalt, diabase, dolomite and the like as main raw materials. Because the raw materials are melted at high temperature and then spun by a high-speed centrifuge to prepare the rock wool fiber, a large amount of resources and energy are consumed. From a resource and environmental perspective, this is not in line with sustainable development requirements. Secondly, the production raw materials of industries such as rock wool, basalt fiber or glass and the like basically adopt powder ingredients, the ingredients are put into a kiln for melting through a feeding machine, and the phenomena of powder flying and material running are easily caused in the feeding process. Meanwhile, a part of powder can be taken away by the waste gas of the kiln, so that the waste of production raw materials is caused, and the flue can be blocked and the corrosion of refractory materials of the flue is aggravated in long-term production. Also, enterprises adopt a tank kiln method for production, production raw materials are blocky raw materials, the blocky raw materials are directly thrown into the kiln, a preheating process is omitted, energy consumption is high, and continuous production cannot be realized.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides a method for producing rock wool by using coal gangue. The problems of large energy consumption and difficult realization of continuous production in rock wool production are solved.
In order to achieve the above object, the present invention is achieved by the following technical solutions.
A method for producing rock wool by utilizing coal gangue comprises the following steps:
a) weighing coal gangue, slag, diatomite and kaolin according to the parts by weight;
b) calcining the raw materials in a melting tank furnace and melting the raw materials into magma;
c) centrifuging the rock pulp at a high speed to spin filaments, and spraying a binder and a water repellent to prepare fibers;
d) collecting, spreading, pressing, solidifying and cutting the fibers in sequence to prepare a rock wool material;
the coal gangue-based composite material comprises, by weight, 50-75 parts of coal gangue, 10-20 parts of slag, 8-15 parts of diatomite and 5-15 parts of kaolin.
Preferably, the melting furnace comprises a calcining section and a melting bath, the melting bath is arranged at the tail part of the calcining section, a discharge hole of the calcining section is higher than a feed inlet of the melting bath, the calcining section and the melting bath are respectively provided with a burning gun, the calcining section is connected with a feeding device, the melting bath comprises a front melting bath section and a rear melting bath section, a partition wall is arranged between the front melting bath section and the rear melting bath section, and a discharge hole is arranged in the middle or at the lower part of the partition wall.
Further, the discharge hole is provided with a screen.
Furthermore, the calcining section comprises a calcining front section and a calcining rear section, a discharge hole of the calcining front section is higher than a feed hole of the calcining rear section, and a discharge hole of the calcining rear section is higher than a feed hole of the molten pool.
Furthermore, the calcining front section is provided with a smoke discharge hole, and the smoke discharge hole is connected with a smoke treatment and purification device through a smoke discharge pipeline.
Furthermore, burning guns are arranged on the top of the front calcining section and the side wall of the rear calcining section, and the burning guns are arranged on the side wall of the molten pool.
Furthermore, the calcination front section is provided with a spiral feeding device.
Compared with the prior art, the invention has the beneficial effects that.
1. The method provided by the invention has the advantages that the traditional raw materials are replaced by the coal gangue and the auxiliary materials to prepare the rock wool, the resource utilization of the coal gangue and the slag is promoted, the treatment process is simple, the environmental pollution is reduced, and the value-added space of the coal gangue and the slag is greatly improved.
2. The coal gangue and other batch materials are conveyed to the front calcining section of the melting tank furnace through the spiral feeding device, concentrated high-temperature calcination can be formed through a top burning gun, and the calcined semi-molten material enters the rear calcining section for further calcination, so that the coal gangue and slag which are difficult to utilize are more sufficiently calcined, and high-quality semi-finished raw materials are provided for subsequent melting.
3. The molten bath anterior segment is used for fully melting, gets into the molten bath back end through the partition wall hole after fully melting, and at this in-process, the melt of molten bath anterior segment has certain impurity and a large amount of foam, and through at the molten bath back end, partial impurity and foam are by the effectual blockking of partition wall, and its homogenization degree effectively improves.
4. The invention realizes the continuous production of rock wool, the melting tank kiln needs to be provided with excessive power devices, the materials are continuously calcined and melted along the production line by depending on the height difference of each working section and combining with the feeding device, the production process is more environment-friendly, and the integral operation cost is low.
Drawings
FIG. 1 is a top plan view of a melting tank furnace according to the present invention.
FIG. 2 is a side cross-sectional view of the melting tank furnace of the present invention.
Wherein, 1 is the calcination anterior segment, 2 is the calcination back end, 3 is the burning gun, 4 is the spiral feeder, 5 is the flue gas discharge hole, 6 is the exhaust pipe, 7 is the molten bath anterior segment, 8 is the molten bath back end, 9 is the partition wall, 10 is the discharge hole, 11 is the bin outlet.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.
Example 1
A method for producing rock wool by utilizing coal gangue comprises the following steps:
a) weighing 60kg of coal gangue, 20kg of slag, 10kg of diatomite and 10kg of kaolin;
b) calcining the raw materials in a melting tank furnace and melting the raw materials into magma;
c) centrifuging the rock pulp at a high speed to spin filaments, and spraying a binder and a water repellent to prepare fibers;
d) collecting, spreading, pressing, solidifying and cutting the fibers in sequence to prepare a rock wool material;
as shown in figures 1 and 2, the melting furnace comprises a calcining section and a melting bath, the calcining section comprises a calcining front section 1 and a calcining rear section 2, the melting bath is arranged at the tail part of the calcining rear section 2, a discharge hole of the calcining front section 1 is higher than a feed hole of the calcining rear section 2, a discharge hole of the calcining rear section 2 is higher than a feed hole of the melting bath, the calcining front section 1, the calcining rear section 2 and the melting bath sequentially form a height drop, a plurality of burning guns 3 are uniformly arranged at the top of the calcining front section 1 and the side wall of the calcining rear section 2, and a plurality of burning guns 3 are also arranged on the side wall of the melting bath. The feed inlet of the calcination front section 1 is provided with a plurality of spiral feeders 4, the calcination front section 1 is provided with a flue gas discharge hole 5, and the flue gas discharge hole 5 is connected with a flue gas treatment and purification device through a flue gas discharge pipeline 6. The molten pool comprises a molten pool front section 7 and a molten pool rear section 8, a partition wall 9 is vertically arranged between the molten pool front section 7 and the molten pool rear section 8, a discharge hole 10 is arranged in the middle of the partition wall 9, and a filter screen is arranged on the discharge hole 10. After partial homogenization in the rear section 8 of the melt bath, the melt enters the subsequent forming process via the discharge opening 11 at the end. The flue gas is discharged through the flue gas smoke discharging hole 5, enters a waste heat utilization and environmental protection facility and is discharged to the atmosphere.
Raw materials such as coal gangue and slay enter the front calcining section 1 through the spiral feeder 4, can form concentrated high-temperature calcination through a plurality of burning guns 3 at the top of the front calcining section 1, and the semi-molten material after calcination continuously enters the rear calcining section 2 to be further calcined in the fall and the advancing process of the front raw material, so that the coal gangue and slay which are difficult to utilize are more fully calcined at this stage, and high-quality semi-finished raw materials are provided for subsequent melting. The front section 7 of the molten pool is used for fully melting calcined raw materials, the fully melted raw materials enter the rear section 8 of the molten pool through the discharge hole 10 of the partition wall 9, certain impurities and a large amount of foam exist in the melt of the front section 7 of the molten pool in the process, and part of the impurities and the foam are effectively blocked by the partition wall 9 through the rear section 8 of the molten pool, so that the homogenization degree of the foam is effectively improved. The structure through above melting tank furnace has realized the continuous production of rock wool, and melting tank furnace need not to set up too much power device, relies on the difference in height of each workshop section and combines feeder to make the material calcine in succession along the production line and found, and the production process is more environmental protection, and whole running cost is low.
Example 2
A method for producing rock wool by using coal gangue comprises the following steps of: weighing 50kg of coal gangue, 20kg of slag, 15kg of diatomite and 15kg of kaolin; the structures of the adopted melting tank furnaces are the same.
Example 3
A method for producing rock wool by using coal gangue comprises the following steps of: weighing 72kg of coal gangue, 15kg of slag, 8kg of diatomite and 5kg of kaolin; the structures of the adopted melting tank furnaces are the same.
While the invention has been described in further detail with reference to specific preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A method for producing rock wool by using coal gangue is characterized by comprising the following steps:
a) weighing coal gangue, slag, diatomite and kaolin according to the parts by weight;
b) calcining the raw materials in a melting tank furnace and melting the raw materials into magma;
c) centrifuging the rock pulp at a high speed to spin filaments, and spraying a binder and a water repellent to prepare fibers;
d) collecting, spreading, pressing, solidifying and cutting the fibers in sequence to prepare a rock wool material;
the coal gangue-based composite material comprises, by weight, 50-75 parts of coal gangue, 10-20 parts of slag, 8-15 parts of diatomite and 5-15 parts of kaolin.
2. The method as claimed in claim 1, wherein the melting furnace includes a calcining section and a melting bath, the melting bath is disposed at the end of the calcining section, the outlet of the calcining section is higher than the inlet of the melting bath, the calcining section and the melting bath are respectively provided with a burning gun, the calcining section is connected with a feeding device, the melting bath includes a front melting bath section and a rear melting bath section, a partition wall is disposed between the front melting bath section and the rear melting bath section, and a discharge hole is disposed at the middle or lower part of the partition wall.
3. The method for producing rock wool by using coal gangue as claimed in claim 2, wherein the discharge hole is provided with a strainer.
4. The method for producing rock wool by using coal gangue as claimed in claim 2, wherein the calcining section comprises a calcining front section and a calcining rear section, the outlet of the calcining front section is higher than the inlet of the calcining rear section, and the outlet of the calcining rear section is higher than the inlet of the melting bath.
5. The method for producing rock wool by using coal gangue as claimed in claim 4, wherein the calcination front section is provided with a flue gas discharge hole, and the flue gas discharge hole is connected with a flue gas treatment and purification device through a smoke discharge pipeline.
6. The method for producing rock wool by using coal gangue as claimed in claim 4, wherein burning guns are arranged on the top of the calcination front section and on the side wall of the calcination rear section, and the burning guns are arranged on the side wall of the molten pool.
7. The method for producing rock wool by using coal gangue as claimed in claim 4, wherein a spiral feeding device is arranged at the front calcining stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010888175.6A CN112030350A (en) | 2020-08-28 | 2020-08-28 | Method for producing rock wool by using coal gangue |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010888175.6A CN112030350A (en) | 2020-08-28 | 2020-08-28 | Method for producing rock wool by using coal gangue |
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| CN112030350A true CN112030350A (en) | 2020-12-04 |
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| CN202010888175.6A Pending CN112030350A (en) | 2020-08-28 | 2020-08-28 | Method for producing rock wool by using coal gangue |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117466538A (en) * | 2023-12-27 | 2024-01-30 | 东华大学 | Medium-alkali glass fiber with waste diatomite as main raw material and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117466538A (en) * | 2023-12-27 | 2024-01-30 | 东华大学 | Medium-alkali glass fiber with waste diatomite as main raw material and preparation method thereof |
| CN117466538B (en) * | 2023-12-27 | 2024-03-01 | 东华大学 | Medium-alkali glass fiber with waste diatomite as main raw material and preparation method thereof |
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