CN109052976B - Use of boron-oxygen containing compounds in mineral wool production - Google Patents
Use of boron-oxygen containing compounds in mineral wool production Download PDFInfo
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- CN109052976B CN109052976B CN201810930416.1A CN201810930416A CN109052976B CN 109052976 B CN109052976 B CN 109052976B CN 201810930416 A CN201810930416 A CN 201810930416A CN 109052976 B CN109052976 B CN 109052976B
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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
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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
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
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Abstract
The invention relates to the use of a boron-oxygen containing compound for the production of mineral wool; belongs to the technical field of mineral wool production and manufacture. The invention relates to the application of boron-containing oxide in the production of mineral wool; smelting slag is used as a raw material; taking a compound containing boron and oxygen as process control, adding the process control agent into the smelting slag, and heating to be molten; making the melt into mineral wool; the process control enables the temperature span interval of the melt to be 65-100 ℃ when the viscosity interval of the melt is 1-3 Pa.s. The invention skillfully utilizes the reasonable proportion between the borax and the ferronickel smelting waste residue, obviously improves the physical and chemical properties of the ferronickel smelting waste residue, enables the ferronickel smelting waste residue to become a high-quality raw material for mineral wool production, solves the problem that the ferronickel waste residue is not suitable for producing the mineral wool, can be widely applied to the fields of buildings and the like, and realizes the recycling and economic application of the waste residue.
Description
Technical Field
The invention relates to the use of a boron-oxygen containing compound for the production of mineral wool; belongs to the technical field of mineral wool production and manufacture.
Background
Mineral wool is an inorganic silicate fiber material, has the advantages of good heat insulation and heat preservation performance and the like, and is widely applied to the field of buildings. The production raw materials of the mineral wool mainly comprise two kinds of rocks, namely, the rocks and the metallurgical waste residues, the mineral wool produced by the rock raw materials is called rock wool, and the mineral wool produced by the metallurgical waste residues is mineral wool. Meanwhile, nickel is an essential element for producing stainless steel, a large amount of ferronickel waste residues are stockpiled along with the development of the steel industry in China, and the stockpiling of metallurgical solid wastes brings huge pressure to the environment. Therefore, it is necessary to find a resource utilization way of ferronickel smelting waste residue.
The production of mineral wool products from certain metallurgical waste residues is a mature technology, both Japanese New-day iron and Chinese Taiyuan iron and steel utilize blast furnace slag to produce mineral wool boards, and Chinese patent (application No. CN 104445909A, a novel slag wool fiberboard) and the like disclose related patents. Along with the rapid increase of the ferronickel smelting waste residue, the resource utilization of the ferronickel smelting waste residue is more important, and a Chinese patent (application No. CN 102399055A, a method for preparing superfine inorganic fiber by using the ferronickel smelting waste residue) discloses a method for producing mineral fiber by using basalt and the ferronickel smelting waste residue; chinese patent application No. CN 103043895 a discloses a method for producing mineral wool by using liquid smelting slag to make fiber.
In the above methods, it is difficult to realize a wide temperature range of the fluid at an appropriate viscosity by a simple control agent; thereby making it difficult to make the waste slag a good quality mineral fiber raw material.
Disclosure of Invention
The present invention addresses the deficiencies of the prior art by providing a boron-oxygen containing compound for use in the production of mineral wool.
The invention relates to the application of boron-containing oxide in the production of mineral wool; smelting slag is used as a raw material; taking a compound containing boron and oxygen as process control, adding the process control agent into the smelting slag, and heating to be molten; making the melt into mineral wool; the process control enables the temperature span interval of the melt to be 65-100 ℃ when the viscosity interval of the melt is 1-3 Pa.s.
The invention relates to the application of boron-containing oxide in the production of mineral wool; the melting temperature of the mixture obtained by adding the process control agent into the smelting slag is 1300-1500 ℃.
The invention relates to the application of boron-containing oxide in the production of mineral wool; when the viscosity of the melt is 1-3 Pa.s, the temperature span interval of the melt is 65-100 ℃. In the invention, when the viscosity range is 1-3 Pa.s, the temperature span range is 65-100 ℃, which can be understood as that when the viscosity is changed in the range of 1-3 Pa.s, the temperature of the melt is A when the defined viscosity is minimum, and the temperature of the melt is B when the defined viscosity is maximum; the value range of the | A-B | is 65-100 ℃.
The invention relates to the application of boron-containing oxide in the production of mineral wool; the smelting slag is preferably ferronickel smelting slag. As further preference; the ferronickel smelting waste residue is water-quenched ferronickel smelting waste residue obtained by laterite-nickel ore through a rotary kiln-submerged arc furnace process (RKEF), wherein the content of MgO (20% < MgO < 40%).
The invention relates to the application of boron-containing oxide in the production of mineral wool; the boron-oxygen containing compound is at least one of borax, borocalcite and boric acid. Borax is preferred.
In industrial application, the boron-containing oxide is applied to the production of mineral wool; the ferronickel smelting waste residue and the borax are reasonably proportioned, are uniformly mixed and then are heated and melted in an electric arc furnace, and then mineral wool is prepared by centrifugal equipment and slag wool separation equipment.
The invention relates to the application of boron-containing oxide in the production of mineral wool; the mass ratio of the boron-oxygen containing compound to the smelting slag is 0.01-0.10: 1. preferably 0.05-0.09: 1; more preferably 0.05 to 0.08:1, still more preferably 0.065 to 0.075: 1.
The invention relates to the application of boron-containing oxide in the production of mineral wool; when the smelting slag is ferronickel smelting waste slag and the boron-oxygen containing compound is borax, the mass ratio of the borax to the ferronickel smelting waste slag is 0.01-0.10: 1. preferably 0.05-0.09: 1; more preferably 0.05 to 0.08:1, still more preferably 0.065 to 0.075: 1. therefore, the operation greatly widens the temperature span of the ferronickel smelting waste slag melt when the viscosity interval is 1-3 Pa.s, and necessary conditions are provided for realizing industrial production. And simultaneously provides necessary conditions for obtaining high-quality mineral wool.
The invention relates to the application of boron-containing oxide in the production of mineral wool; in industrial application, the operation steps are as follows:
(1) preparing tempering ferronickel smelting waste residues, namely reasonably proportioning and mixing the ferronickel smelting waste residues and borax, wherein the ratio of the borax to the waste residues is 0.01-0.10; (2) tempering the melting of the ferronickel smelting waste slag, namely putting the borax and the ferronickel waste slag which are uniformly mixed in proportion into an electric furnace for heating and melting: (3) temperature measurement sampling is carried out, temperature measurement sampling is carried out after raw materials are melted, and the constant temperature viscosity test is carried out on the molten slag at the deslagging temperature; (4) and (3) slag wool production, namely pouring slag with proper temperature and viscosity into a cotton forming device to prepare the slag wool. The process parameters such as the rotating speed of the centrifugal machine need to be reasonably adjusted.
The invention skillfully utilizes a single compound containing boron-oxygen with proper amount as a control agent; through the reasonable proportion between the nickel-iron smelting waste slag and the waste slag, the physical and chemical properties of the waste slag are obviously improved, and particularly, the temperature range of the melt in 1-3 Pa.s is widened; this provides the necessary conditions for obtaining high quality slag wool. Meanwhile, the method also solves the problems that the ferronickel waste residue is not suitable for directly producing the mineral wool or the process is difficult to control in the process of producing the mineral wool or the product components can not be standardized. The product prepared by the invention can be widely applied to the fields of buildings and the like, and realizes the resource utilization and economic application of waste residues.
Compared with other inventions, the invention has the following advantages:
(1) according to the invention, a proper amount of boron-oxygen containing compound (including borax) is used as a quenching and tempering agent for the first time, and the melting point of the ferronickel smelting waste residue after quenching and tempering is obviously reduced, so that the melting temperature of the electric furnace for heating is effectively reduced, the electric energy is saved, the process production difficulty and the production cost are reduced, and the production efficiency is improved. Meanwhile, the invention adopts a proper amount of boron-oxygen containing compound (including borax) as a hardening and tempering agent, so that the performance of ferronickel smelting waste slag as a raw material for producing mineral wool is improved, the addition of boron widens the temperature range of the raw material within 1-3 Pa.s, simultaneously inhibits the crystallization behavior of slag, increases the glass phase of the slag, and can improve the performance of mineral wool products.
(2) Temperature measurement and sampling are carried out in the process production, so that the process production can be accurately guided, and the stable production and the product quality can be effectively ensured.
Drawings
FIG. 1 is a process flow diagram for the production of mineral wool.
Detailed Description
The practice of producing mineral wool from ferronickel slag after tempering in a 1t electric furnace and a four-rod centrifugal device. The average components of water-quenched ferronickel waste residues obtained by subjecting laterite-nickel ore to rotary kiln-submerged arc furnace (RKEF) are shown in the following table:
| composition (I) | TNi | TFe | SiO2 | CaO | MgO | Al2O3 | Cr2O3 | TiO2 |
| Percent by weight/%) | 0.06 | 6.94 | 47.95 | 5.49 | 31.56 | 4.42 | 1.54 | 0.32 |
The borax adopts GB/T537-2009, the purity is more than 95%, and the granularity is 60 meshes. The production and manufacture of the mineral wool are carried out by adopting the raw materials and the equipment.
Example 1
The implementation aims at the method for producing mineral wool by using the quenched and tempered ferronickel smelting waste residue in a 1t electric arc furnace. 200kg of ferronickel smelting waste residues, 10kg of borax, and the proportion of the borax to the waste residues is 0.05; mixing borax and waste residue, adding into electric furnace, arc starting, heating, 50min later, completely melting raw materials, measuring temperature, and starting electric furnace to heat-insulating power after temperature reaches 1600 deg.C. Taking 500g of slag, and measuring the viscosity value of the slag in a temperature range of 1600-1500 ℃ in a viscometer. Measuring the temperature of the slag to 1593 ℃ after the temperature-viscosity value is proper; slag is discharged by reversing the furnace, the slag is poured on a roller of a four-roller centrifuge through a diversion trench, and the rotating speeds of the four rollers are 1#2070r/min, 2#3093r/min, 3#4350r/min and 4#5800r/min respectively; the slag wool is collected by a cotton collecting chamber, and a mineral wool product is obtained after the subsequent procedures. Process steps and temperature measurement sampling results in example 1:
the mineral wool prepared by the process is detected according to the national standard GT/T11835-2016 rock wool for heat insulation, mineral wool and products, the detection shows that the product quality meets the national standard, and the specific results are shown in the following table:
| detecting items | Index value | Example 1 |
| Fiber diameter (μm) | ≤7 | 4.6 |
| Density/(kg. m)-3) | ≥40 | 76 |
| Thermal conductivity (average temperature 25 ℃ C.)/(W.m)-1·K-1) | ≤0.040 | 0.036 |
| Temperature of load contraction/. degree.C | ≥600 | 620 |
| Organic matter content (mass fraction)/%) | ≤4.00 | 3.6 |
| Moisture content of mass% | ≤1.00 | 0.60 |
Example 2
The implementation aims at the method for producing mineral wool by using the quenched and tempered ferronickel smelting waste residue in a 1t electric arc furnace. 200kg of ferronickel smelting waste residues, 14kg of borax, and the proportion of the borax to the waste residues is 0.07; and (3) uniformly mixing borax and waste residues, adding into an electric furnace, arcing and heating, after 46min, completely melting down the raw materials, measuring the temperature, and after the temperature reaches 1550 ℃, starting the electric furnace to the heat preservation power. Taking 500g of slag, and measuring the viscosity value of the slag in a temperature range of 1550-1450 ℃ in a viscometer. Measuring the temperature of the molten slag to 1544 ℃ after the temperature-viscosity value is proper; slag is discharged by reversing the furnace, the slag is poured on a roller of a four-roller centrifuge through a diversion trench, and the rotating speeds of the four rollers are 1#2070r/min, 2#3093r/min, 3#4350r/min and 4#5800r/min respectively; the slag wool is collected by a cotton collecting chamber, and a mineral wool product is obtained after the subsequent procedures. Process steps and temperature measurement sampling results in example 1:
the mineral wool prepared by the process is detected according to the national standard GT/T11835-2016 rock wool for heat insulation, mineral wool and products, the detection shows that the product quality meets the national standard, and the specific results are shown in the following table:
| detecting items | Index value | Example 2 |
| Fiber diameter (μm) | ≤7 | 3.1 |
| Density/(kg. m)-3) | ≥40 | 79 |
| Thermal conductivity (average temperature 25 ℃ C.)/(W.m)-1·K-1) | ≤0.040 | 0.033 |
| Temperature of load contraction/. degree.C | ≥600 | 640 |
| Organic matter content (mass fraction)/%) | ≤4.00 | 3.0 |
| Moisture content of mass% | ≤1.00 | 0.50 |
Example 3
The implementation aims at the method for producing mineral wool by using the quenched and tempered ferronickel smelting waste residue in a 1t electric arc furnace. 200kg of ferronickel smelting waste residue, 18kg of borax, and the proportion of the borax to the waste residue is 0.09; and (3) uniformly mixing borax and waste residues, adding into an electric furnace, starting arc and heating, after 45min, completely melting the raw materials, measuring temperature, and after the temperature reaches 1500 ℃, starting the electric furnace to keep the temperature. Taking 500g of slag, and measuring the viscosity value of the slag in a temperature range of 1500-1350 ℃ in a viscometer. Measuring the temperature of the molten slag to 1498 ℃ after the temperature-viscosity value is proper; slag is discharged by reversing the furnace, the slag is poured onto a four-roller centrifuge roller wheel in a flow shape through a diversion trench, and the rotating speeds of the four rollers are 1#2070r/min, 2#3093r/min, 3#4350r/min and 4#5800r/min respectively; the slag wool is collected by a cotton collecting chamber, and a mineral wool product is obtained after the subsequent procedures. Process steps and temperature measurement sampling results in example 1:
the mineral wool prepared by the process is detected according to the national standard GT/T11835-2016 rock wool for heat insulation, mineral wool and products, the detection shows that the product quality meets the national standard, and the specific results are shown in the following table:
| detecting items | Index value | Example 3 |
| Fiber diameter (μm) | ≤7 | 4.2 |
| Density/(kg. m)-3) | ≥40 | 76 |
| Thermal conductivity (average temperature 25 ℃ C.)/(W.m)-1·K-1) | ≤0.040 | 0.035 |
| Temperature of load contraction/. degree.C | ≥600 | 620 |
| Organic matter content (mass fraction)/%) | ≤4.00 | 3.3 |
| Moisture content of mass% | ≤1.00 | 0.56 |
Comparative example 1
The other conditions were the same as in example 2 except that: no borax was added; the temperature span of the melt at 1-3 Pa.s is only 9 ℃; the mineral wool product prepared according to the comparative example 1 is detected by the national standard GT/T11835-2016 rock wool for heat insulation, slag wool and products, wherein a plurality of indexes can not meet the quality requirements, and the specific results are shown in the following table:
comparative example 2
The other conditions were the same as in example 2 except that: 200kg of ferronickel waste residue, 40kg of borax, and the proportion of the borax to the waste residue is 0.20; the large addition of borax leads to the great reduction of the melting point of ferronickel smelting waste slag, and the excessive addition of boron-oxygen compounds causes the sharp narrowing of the melt to 25 ℃ at the temperature span of 1-3 Pa.s; the mineral wool product prepared according to the comparative example 1 is detected by the national standard GT/T11835-2016 rock wool for heat insulation, slag wool and products, wherein a plurality of indexes can not meet the quality requirements, and the specific results are shown in the following table:
| detecting items | Index value | Comparative example 2 |
| Fiber diameter (μm) | ≤7 | 9.1 |
| Density/, (kg·m-3) | ≥40 | 50 |
| Thermal conductivity (average temperature 25 ℃ C.)/(W.m)-1·K-1) | ≤0.040 | 0.080 |
| Temperature of load contraction/. degree.C | ≥600 | 430 |
| Organic matter content (mass fraction)/%) | ≤4.00 | 3.6 |
| Moisture content of mass% | ≤1.00 | 0.78 |
Claims (4)
1. Use of a boron-containing oxide for the production of mineral wool; the method is characterized in that: smelting slag is used as a raw material; taking a compound containing boron and oxygen as process control, adding the process control agent into the smelting slag, and heating to be molten; making the melt into mineral wool; the process control enables the temperature span interval of the melt to be 65-100 ℃ when the viscosity interval of the melt is 1-3 Pa.s; the boron-oxygen containing compound is borax; the smelting slag is ferronickel smelting slag; the mass ratio of the borax to the ferronickel smelting waste residue is 0.05-0.09: 1.
2. use of a boron-containing oxide according to claim 1 in the production of mineral wool; the method is characterized in that: adding the process control agent into the smelting slag, wherein the melting temperature of the obtained mixture is 1300-1500 ℃.
3. Use of a boron-containing oxide according to claim 1 in the production of mineral wool; the method is characterized in that: the mass ratio of the borax to the ferronickel smelting waste residue is 0.05-0.08: 1.
4. Use of a boron-containing oxide according to claim 3 in the production of mineral wool; the method is characterized in that: the mass ratio of the borax to the ferronickel smelting waste residue is 0.065-0.075: 1.
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