CN107651857B - Process for quickly dissolving silica sand and bauxite in slag liquid - Google Patents
Process for quickly dissolving silica sand and bauxite in slag liquid Download PDFInfo
- Publication number
- CN107651857B CN107651857B CN201710802905.4A CN201710802905A CN107651857B CN 107651857 B CN107651857 B CN 107651857B CN 201710802905 A CN201710802905 A CN 201710802905A CN 107651857 B CN107651857 B CN 107651857B
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- CN
- China
- Prior art keywords
- slag
- nitrogen
- bauxite
- silica sand
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 239000002893 slag Substances 0.000 title claims abstract description 63
- 239000007788 liquid Substances 0.000 title claims abstract description 33
- 229910001570 bauxite Inorganic materials 0.000 title claims abstract description 27
- 239000004576 sand Substances 0.000 title claims abstract description 27
- 239000000377 silicon dioxide Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 95
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 46
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 17
- 238000003756 stirring Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000004090 dissolution Methods 0.000 claims abstract description 9
- 238000003780 insertion Methods 0.000 claims abstract description 4
- 230000037431 insertion Effects 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 239000011490 mineral wool Substances 0.000 description 14
- 238000002844 melting Methods 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/18—Stirring devices; Homogenisation
- C03B5/193—Stirring devices; Homogenisation using gas, e.g. bubblers
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Glass Compositions (AREA)
Abstract
The invention discloses a process for quickly dissolving silica sand and bauxite in slag liquid, which comprises the following steps: inserting a nitrogen pipeline into the hot slag through a furnace cover, inserting the nitrogen pipeline into the position 200-500cm below the surface of the high-temperature slag, and adjusting the flow corresponding to the nitrogen according to the difference of the liquid level of the slag in the furnace and the insertion depth to stir the slag liquid, the silica sand and the bauxite so as to realize the rapid dissolution of the silica sand and the bauxite in the slag liquid; the nitrogen pressure is kept between 0.5 and 0.6MPa, and the adopted nitrogen pipeline is made of hollow carbon rod materials. The nitrogen stirring is adopted, so that the requirements of fast-paced mass production and uniform and stable components are met, and the unit power consumption is reduced.
Description
Technical Field
The invention relates to a process for quickly dissolving silica sand and bauxite in slag liquid, belonging to the technical field of mineral wool production from blast furnace slag.
Background
In the production of iron and steel enterprises, blast furnace slag is a derivative product of blast furnace ironmaking. In order to construct a resource-saving and environment-friendly society, the recycling economy needs to be developed vigorously, and the resource utilization efficiency is improved. The ultrafine powder produced by using blast furnace slag after flushing slag is used in the cement concrete industry, is one of the comprehensive utilization ways of blast furnace slag, and has been widely accepted by the industry in recent years. The production of the mineral wool by using the blast furnace hot slag is another way of blast furnace slag comprehensive utilization, and compared with the two ways, the production of the mineral wool utilizes the characteristic of sensible heat of the blast furnace hot slag, so that the energy is saved.
In the process of producing mineral wool by using blast furnace hot slag, a proper amount of auxiliary materials, such as silica sand or bauxite, are required to be added into liquid high-temperature slag to adjust the acidity coefficient of the slag, and the acidity coefficient range is controlled to be 1.2-1.3 so as to meet the production requirement of the mineral wool. The added silica sand or bauxite auxiliary material is concentrated and floats on the surface of the liquid slag, and the dissolution of the silica sand or bauxite is a slow process, so that the requirement of fast-paced mass production cannot be met. How to rapidly dissolve the added silica sand or bauxite and make the slag liquid components uniform becomes the problem to be solved in mineral wool production. Only by solving the problem, the uniform slag-liquid components and the stable quality of mineral wool products in the fast-paced mass production process can be ensured.
Disclosure of Invention
The invention aims to provide a process for quickly dissolving silica sand and bauxite in slag liquid, and the rapid dissolution of the silica sand or bauxite can be realized by stirring liquid high-temperature slag liquid with nitrogen.
The invention provides a process for quickly dissolving silica sand and bauxite in slag liquid, which comprises the following steps:
inserting a nitrogen pipeline into the hot slag through a furnace cover, inserting the nitrogen pipeline into the position 200-500cm below the surface of the high-temperature slag, and adjusting the flow corresponding to the nitrogen according to the difference of the liquid level of the slag in the furnace and the insertion depth to stir the slag liquid, the silica sand and the bauxite so as to realize the rapid dissolution of the silica sand and the bauxite in the slag liquid; the nitrogen pressure is kept between 0.5 and 0.6MPa, and the adopted nitrogen pipeline is made of hollow carbon rod materials.
In the scheme, the adding amount of the silica sand and the bauxite is more than 1200 kg/h, and strong stirring is used; the nitrogen pressure is kept between 0.5 and 0.6MPa, and strong stirring is performed when the nitrogen flow is controlled between 60 and 80L \ min;
the addition amount of the silica sand and the bauxite is 800-1200 kg/h, and weak stirring is used; the nitrogen pressure is kept between 0.5 and 0.6MP, and the nitrogen flow is weakly stirred when the nitrogen flow is controlled between 30 and 60L \ min.
The method utilizes the inertia of nitrogen, only plays a role of physical stirring, does not generate any chemical reaction with the slag, and does not change the slag components.
The nitrogen pipeline inserted into the liquid slag adopts a hollow carbon rod material in order to prevent high-temperature melting.
In order to prevent the outlet of the hollow carbon rod from being pasted by the molten slag, nitrogen is firstly introduced before the molten slag is inserted, the flow rate is kept to be not lower than 30L/min, and the nitrogen is also not closed before the hollow carbon rod is pulled out of the liquid molten slag.
The hollow carbon rods are connected in a threaded manner, the three sections form one carbon rod, the disassembly is convenient, the carbon rods can be lengthened according to the consumption degree of the carbon rods, the resources are saved, and each carbon rod is greatly utilized.
The principle of the invention is as follows: and inserting a nitrogen pipeline into the liquid high-temperature molten slag, and boiling the slag liquid when the pressure of nitrogen is adjusted to be 0.5-0.6 MPa to play a role in stirring so as to accelerate the dissolution speed of silica sand and bauxite in the slag liquid and produce mineral wool.
The invention has the beneficial effects that:
(1) in the process of producing mineral wool by using the blast furnace hot slag, the method realizes the rapid dissolution of the added auxiliary materials, ensures the uniform slag liquid components, meets the requirement of the mineral wool production process on rapid-rhythm continuous production, ensures the uniform hot slag components and realizes the purpose of stable quality of mineral wool products.
(2) The unit power consumption can be reduced by 233 kwh/t, and the unit power consumption cost can be reduced by 105 yuan/ton.
Detailed Description
The present invention is further illustrated by, but is not limited to, the following examples.
Example 1:
the method is used for trial production in the A furnace and the B furnace of the smelting operation area of the hot melting slag cotton manufacturing division of the Tai steel processing factory, one furnace is stirred by nitrogen gas, the other furnace is not stirred by nitrogen gas in the production process, and the contrast effect is obvious. The specific embodiment is as follows:
firstly, inserting a nitrogen pipeline into hot slag through a furnace cover, inserting the nitrogen pipeline into the position 200-500cm below the surface of the high-temperature slag, and adjusting the flow corresponding to nitrogen according to the difference of the liquid level of the slag in the furnace and the insertion depth to stir the slag liquid, the silica sand and the bauxite so as to realize the rapid dissolution of the silica sand and the bauxite in the slag liquid; the nitrogen pressure is kept between 0.5 and 0.6MPa, and the adopted nitrogen pipeline is made of hollow carbon rod materials.
In the embodiment, the adding amount of the silica sand and the bauxite is 1200 kg/h, the nitrogen pressure is kept between 0.5 and 0.6MPa, and the nitrogen flow is controlled at 60L/min;
in order to prevent the outlet of the hollow carbon rod from being pasted by the molten slag, nitrogen is firstly introduced before the molten slag is inserted, the flow rate is kept to be not lower than 30L/min, and the nitrogen is also not closed before the hollow carbon rod is pulled out of the liquid molten slag.
After the implementation, the experimental data as given in table 1 below are obtained: comprises the dissolution speed of auxiliary materials, the hourly slag output and the composition data of hot melting slag.
TABLE 1
As can be seen from Table 1, when the nitrogen gas is used for stirring, the dissolving speed of the auxiliary materials can be increased by more than one time, the yield of the mineral wool is greatly improved, the components of the hot-melting slag are uniform, and the quality of the mineral wool is obviously improved.
TABLE 2
The dissolving speed of the auxiliary materials is increased to realize that the yield of the mineral wool is doubled, the unit power consumption can be greatly reduced, the unit power consumption can be reduced by 233 kwh/t and the unit power consumption cost can be reduced by 105 yuan/ton according to the calculation of the average electric quantity of the furnace A in single-line production of 2000kwh, the average electric quantity of the furnace B in B1600 kwh, the average electric quantity of the furnace A in double-line production of 2600kwh and the average electric quantity of the furnace B in 1800 kwh. The power consumption analysis is shown in Table 2.
Claims (2)
1. A process for rapidly dissolving silica sand and bauxite in slag liquid is characterized by comprising the following steps:
inserting a nitrogen pipeline into the hot slag through a furnace cover, inserting the nitrogen pipeline into the position 200-500cm below the surface of the high-temperature slag, and adjusting the flow corresponding to the nitrogen according to the difference of the liquid level of the slag in the furnace and the insertion depth to stir the slag liquid, the silica sand and the bauxite so as to realize the rapid dissolution of the silica sand and the bauxite in the slag liquid; the nitrogen pressure is kept between 0.5 and 0.6MPa, and the adopted nitrogen pipeline is made of hollow carbon rod materials; before the nitrogen pipeline is inserted into the molten slag, nitrogen is introduced firstly, the flow rate is kept to be not lower than 30L/min, and the nitrogen is not closed before the nitrogen pipeline is pulled out of the liquid molten slag;
the adding amount of the silica sand and the bauxite is more than 1200 kg/h, and strong stirring is used; the nitrogen pressure is kept between 0.5 and 0.6MPa, and strong stirring is performed when the nitrogen flow is controlled between 60 and 80L/min;
the addition amount of the silica sand and the bauxite is 800-1200 kg/h, and weak stirring is used; the nitrogen pressure is kept between 0.5 and 0.6MP, and the nitrogen flow is weakly stirred when the nitrogen flow is controlled between 30 and 60L/min.
2. The process of claim 1 for rapidly dissolving silica sand and bauxite in a slag bath, wherein: the hollow carbon rod is in threaded connection, and three sections of the hollow carbon rod form a carbon rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710802905.4A CN107651857B (en) | 2017-09-08 | 2017-09-08 | Process for quickly dissolving silica sand and bauxite in slag liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710802905.4A CN107651857B (en) | 2017-09-08 | 2017-09-08 | Process for quickly dissolving silica sand and bauxite in slag liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107651857A CN107651857A (en) | 2018-02-02 |
| CN107651857B true CN107651857B (en) | 2020-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710802905.4A Active CN107651857B (en) | 2017-09-08 | 2017-09-08 | Process for quickly dissolving silica sand and bauxite in slag liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107651857B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110590128A (en) * | 2019-09-30 | 2019-12-20 | 辽宁九凤武岩科技有限公司 | Production method of basalt continuous fibers |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5529594A (en) * | 1994-04-28 | 1996-06-25 | Stir-Melter, Inc. | Method for producing mineral fibers having gaseous occlusions |
| JP2005154259A (en) * | 2003-10-27 | 2005-06-16 | Nippon Electric Glass Co Ltd | Glass composition and its manufacturing method |
| CN101296872A (en) * | 2005-10-31 | 2008-10-29 | 株式会社小原 | Optical glass, manufacturing device of optical glass, and manufacturing method thereof |
| CN205275445U (en) * | 2016-01-06 | 2016-06-01 | 成都光明光电股份有限公司 | Glass liquid tympanic bulla pipe and glass liquid bubbling device |
-
2017
- 2017-09-08 CN CN201710802905.4A patent/CN107651857B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5529594A (en) * | 1994-04-28 | 1996-06-25 | Stir-Melter, Inc. | Method for producing mineral fibers having gaseous occlusions |
| JP2005154259A (en) * | 2003-10-27 | 2005-06-16 | Nippon Electric Glass Co Ltd | Glass composition and its manufacturing method |
| CN101296872A (en) * | 2005-10-31 | 2008-10-29 | 株式会社小原 | Optical glass, manufacturing device of optical glass, and manufacturing method thereof |
| CN205275445U (en) * | 2016-01-06 | 2016-06-01 | 成都光明光电股份有限公司 | Glass liquid tympanic bulla pipe and glass liquid bubbling device |
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| Publication number | Publication date |
|---|---|
| CN107651857A (en) | 2018-02-02 |
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