CN110606734A - Method for preparing inclusion rod - Google Patents
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- CN110606734A CN110606734A CN201911044095.6A CN201911044095A CN110606734A CN 110606734 A CN110606734 A CN 110606734A CN 201911044095 A CN201911044095 A CN 201911044095A CN 110606734 A CN110606734 A CN 110606734A
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
- C04B2235/661—Multi-step sintering
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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Abstract
The invention relates to the technical field of metallurgical experiments, in particular to a method for preparing a inclusion rod, which comprises the following steps: a. mixing materials, namely weighing corresponding chemical reagent powder according to the components of the inclusions, and adding deionized water for mixing to obtain a mixture; b. blank making, namely dehydrating the obtained mixture, then drying the mixture in a drying box to obtain clinker after drying; c. cold press molding, namely putting the obtained clinker into a corresponding mold, and obtaining a semi-finished product inclusion rod through cold press molding; d. after high-temperature treatment, the finished product inclusion rod is prepared; the inclusion rod is consistent with the components of inclusions in molten steel, can be used for detecting and researching the behavior of various inclusions in steel in slag or molten steel, and can detect the influence among the inclusions because the inclusion rod comprises various inclusions and the various inclusions simultaneously, thereby improving the efficiency of research and detection and obviously improving the accuracy of detection results.
Description
Technical Field
The invention relates to the technical field of metallurgical experiments, in particular to a method for preparing a inclusion rod.
Background
In the steel-making process, slag, refractory materials, oxygen elements in the atmosphere and the like may enter molten steel, and the elements react with each other at the steel-making temperature to form inclusions, so that nozzle nodulation in the continuous casting process or fatigue crack sources formed in the subsequent forging and rolling processes are caused, and the properties of the steel such as fatigue life, impact strength, tensile strength and the like are adversely affected. Therefore, in recent years, many studies have been made on the removal of inclusions in molten steel. At present, many researches are carried out by replacing inclusions in steel after sintering single pure chemical substances, and the removal capacity of different slag systems to the inclusions is explored, so that the research and experiment efficiency is low, the effect is not good, the detection accuracy is low, and the detection of the reaction capacity of the slag systems and the molten steel to the different inclusions is inconvenient.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for preparing inclusion rods, which has high detection efficiency and high accuracy.
The technical scheme adopted by the invention for solving the technical problems is as follows: the preparation method of the inclusion rod comprises the following steps:
a. mixing materials, namely weighing corresponding chemical reagent powder according to the components of the inclusions, and adding deionized water for mixing to obtain a mixture;
b. blank making, namely dehydrating the obtained mixture, then drying the mixture in a drying box to obtain clinker after drying;
c. cold press molding, namely putting the obtained clinker into a corresponding mold, and obtaining a semi-finished product inclusion rod through cold press molding;
d. and (4) high-temperature treatment, namely putting the obtained semi-finished inclusion rod into a heating furnace for high-temperature treatment to obtain the finished inclusion rod.
Further, in the step a, the inclusion is CaO.6Al2O3The chemical reagent powder comprises calcium oxide powder and aluminum oxide powder, and the mass ratio of the calcium oxide powder to the aluminum oxide powder is as follows: 8.38:91.62.
Further, in step a, the corresponding chemical reagent powder is weighed and mixed in a ball mill.
Further, in the step b, the mixture is dehydrated through a vacuum filtration device.
Further, the obtained clinker is in the shape of a plate.
Further, in the step c, the obtained clinker is placed into a cylindrical mold, and is subjected to cold press molding by a cold isostatic press to obtain a semi-finished product inclusion rod.
Further, in step c, the cylindrical die has a diameter of 15mm and a height of 100 mm.
Furthermore, the heating furnace is a high-temperature tube furnace, and the treatment temperature is between 1000 ℃ and 1400 ℃ during high-temperature treatment.
Further, the high-temperature treatment of the semi-finished inclusion rods by the heating furnace is divided into five stages: in the first stage, the temperature is increased to 500 ℃ at the speed of 10 ℃/min; in the second stage, the temperature is increased to 1000 ℃ at the speed of 12 ℃/min; in the third stage, the temperature is increased to 1400 ℃ at the speed of 10 ℃/min; in the fourth stage, the temperature is kept at 1400 ℃ for 2 h; and in the fifth stage, cooling to room temperature along with the furnace.
The invention has the beneficial effects that: the invention prepares the cylindrical inclusion rod after material mixing, blank making, cold press molding and high temperature treatment, the inclusion rod has the same components with the inclusions in molten steel, and can be used for detecting and researching the behavior of various inclusions in steel in slag or molten steel and the influence on products in production. Because the inclusion rod comprises a plurality of inclusions, the inclusions can be detected simultaneously, the influence among the inclusions can be detected, the efficiency of research and detection is improved, the accuracy of detection results is obviously improved, the reaction capability of a slag system and molten steel to different inclusions is convenient to detect, and the cleanliness levels of the molten steel after different slag systems are adopted for smelting are more effectively predicted.
Detailed Description
The preparation method of the inclusion rod is characterized by comprising the following steps of:
a. mixing materials, namely weighing corresponding chemical reagent powder according to the components of the inclusions, and adding deionized water for mixing to obtain a mixture;
b. blank making, namely dehydrating the obtained mixture, and then drying the mixture in a drying box to obtain clinker which also has proper humidity;
c. cold press molding, namely putting the obtained clinker into a corresponding mold, and obtaining a semi-finished product inclusion rod through cold press molding;
d. and (4) high-temperature treatment, namely putting the obtained semi-finished inclusion rod into a heating furnace for high-temperature treatment to obtain the finished inclusion rod.
At present, in the steel-making process, a slag system containing calcium oxide and aluminum oxide is mainly adopted, after the slag-gold equilibrium reaction, the components of the inclusions in the molten steel are also mainly calcium aluminate inclusions, and the common calcium aluminate inclusions in the molten steel are shown in table 1.
TABLE 1
Therefore, in step a, the inclusion is CaO.6Al2O3The chemical reagent powder comprises calcium oxide powder and aluminum oxide powder, and the mass ratio of the calcium oxide powder to the aluminum oxide powder is as follows: 8.38:91.62. Weighing the corresponding chemical reagent powder and uniformly mixing the chemical reagent powder in a ball mill in order to improve the mixing effect of the corresponding chemical reagent powder; or pouring the weighed corresponding chemical reagent powder into a beaker, adding proper deionized water into the beaker, and uniformly stirring to obtain a mixture. Therefore, the invention adopts wet mixing, and can effectively reduce the problem of uneven mixing caused by material loss in the mixing process.
And in the step b, dehydrating the mixture through a vacuum filtration device, wherein the vacuum degree of the vacuum filtration device is 5Pa and the time is at least 10min when the dehydration is performed. The blank with proper humidity can be obtained by adopting the vacuum filtration and drying duplex process, and the forming power in the forming process is increased. For the convenience of operation, the obtained clinker is in a plate shape.
To facilitate the use of the inclusion rods in the experimental work, the inclusion rods are preferably cylindrical and in step c the clinker obtained is placed in a cylindrical mould with a diameter of 15mm and a height of 100 mm. And cold press molding is carried out by a cold isostatic press during molding, so as to obtain the semi-finished product inclusion rod.
In step d, the heating furnace is preferably a high temperature tube furnace, and the treatment temperature is between 1000 and 1400 ℃ during high temperature treatment. In order to ensure the success rate of the preparation of the inclusion rods, the method is obtained through a large number of tests and practices, and the high-temperature treatment of the semi-finished inclusion rods by the heating furnace is divided into five stages: in the first stage, the temperature is increased to 500 ℃ at the speed of 10 ℃/min; in the second stage, the temperature is increased to 1000 ℃ at the speed of 12 ℃/min; in the third stage, the temperature is increased to 1400 ℃ at the speed of 10 ℃/min; in the fourth stage, the temperature is kept at 1400 ℃ for 2 h; and in the fifth stage, cooling to room temperature along with the furnace.
In conclusion, the cylindrical inclusion rod is prepared by mixing, blank making, cold press molding and high-temperature treatment, the components of the inclusion rod are consistent with those of inclusions in molten steel, and the inclusion rod can be used for detecting and researching the behavior of various inclusions in steel in molten slag or molten steel and the influence of the inclusions on products in production. Because the inclusion rod comprises a plurality of inclusions, the inclusions can be detected simultaneously, the influence among the inclusions can be detected, the efficiency of research and detection is improved, the accuracy of detection results is obviously improved, the reaction capability of a slag system and molten steel to different inclusions is convenient to detect, and the cleanliness levels of the molten steel after different slag systems are adopted for smelting are more effectively predicted.
Claims (9)
1. The preparation method of the inclusion rod is characterized by comprising the following steps:
a. mixing materials, namely weighing corresponding chemical reagent powder according to the components of the inclusions, and adding deionized water for mixing to obtain a mixture;
b. blank making, namely dehydrating the obtained mixture, then drying the mixture in a drying box to obtain clinker after drying;
c. cold press molding, namely putting the obtained clinker into a corresponding mold, and obtaining a semi-finished product inclusion rod through cold press molding;
d. and (4) high-temperature treatment, namely putting the obtained semi-finished inclusion rod into a heating furnace for high-temperature treatment to obtain the finished inclusion rod.
2. The method for producing a inclusion rod according to claim 1, wherein: in step a, the inclusion is CaO.6Al2O3The chemical reagent powder comprises calcium oxide powder and aluminum oxide powder, and the mass ratio of the calcium oxide powder to the aluminum oxide powder is as follows: 8.38:91.62.
3. The method for producing a inclusion rod according to claim 1 or 2, characterized in that: in step a, weighed chemical reagent powders are mixed in a ball mill.
4. The method for producing a inclusion rod according to claim 1 or 2, characterized in that: in the step b, the mixture is dehydrated through a vacuum filtration device.
5. The method for producing a inclusion rod according to claim 1 or 2, characterized in that: the obtained clinker is in the shape of a plate.
6. The method for producing a inclusion rod according to claim 1 or 2, characterized in that: and c, putting the obtained clinker into a cylindrical mold, and performing cold press molding by using a cold isostatic press to obtain a semi-finished product inclusion rod.
7. The method of producing a inclusion rod according to claim 6, wherein: in step c, the cylindrical die had a diameter of 15mm and a height of 100 mm.
8. The method for producing a inclusion rod according to claim 1 or 2, characterized in that: the heating furnace is a high-temperature tube furnace, and the treatment temperature is between 1000 ℃ and 1400 ℃ during high-temperature treatment.
9. The method of producing a inclusion rod according to claim 8, wherein: the high-temperature treatment of the semi-finished inclusion rods by the heating furnace comprises five stages: in the first stage, the temperature is increased to 500 ℃ at the speed of 10 ℃/min; in the second stage, the temperature is increased to 1000 ℃ at the speed of 12 ℃/min; in the third stage, the temperature is increased to 1400 ℃ at the speed of 10 ℃/min; in the fourth stage, the temperature is kept at 1400 ℃ for 2 h; and in the fifth stage, cooling to room temperature along with the furnace.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911044095.6A CN110606734A (en) | 2019-10-30 | 2019-10-30 | Method for preparing inclusion rod |
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| CN201911044095.6A CN110606734A (en) | 2019-10-30 | 2019-10-30 | Method for preparing inclusion rod |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020051325A (en) * | 2000-12-22 | 2002-06-29 | 이구택 | Apparatus for removing inclusions in molten steel and removing method by using it |
| CN101319267A (en) * | 2008-07-17 | 2008-12-10 | 鞍钢股份有限公司 | Composite ball for external refining desulfurization and removing fine foreign matter and its making method |
| CN105130409A (en) * | 2015-08-28 | 2015-12-09 | 南通高欣耐磨科技股份有限公司 | Aluminum oxide ceramic composite liner plate and preparation method thereof |
| CN107159858A (en) * | 2017-04-12 | 2017-09-15 | 中民驰远实业有限公司 | A kind of minimizing technology of steel inclusion |
| CN109187182A (en) * | 2018-08-29 | 2019-01-11 | 马鞍山赤源冶金科技有限公司 | A method of for detecting clinker reactivity worth |
| CN110006841A (en) * | 2019-04-11 | 2019-07-12 | 内蒙古神舟硅业有限责任公司 | O, C in a kind of granulated polycrystalline silicon, III, the detection method of group Ⅴ element |
-
2019
- 2019-10-30 CN CN201911044095.6A patent/CN110606734A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020051325A (en) * | 2000-12-22 | 2002-06-29 | 이구택 | Apparatus for removing inclusions in molten steel and removing method by using it |
| CN101319267A (en) * | 2008-07-17 | 2008-12-10 | 鞍钢股份有限公司 | Composite ball for external refining desulfurization and removing fine foreign matter and its making method |
| CN105130409A (en) * | 2015-08-28 | 2015-12-09 | 南通高欣耐磨科技股份有限公司 | Aluminum oxide ceramic composite liner plate and preparation method thereof |
| CN107159858A (en) * | 2017-04-12 | 2017-09-15 | 中民驰远实业有限公司 | A kind of minimizing technology of steel inclusion |
| CN109187182A (en) * | 2018-08-29 | 2019-01-11 | 马鞍山赤源冶金科技有限公司 | A method of for detecting clinker reactivity worth |
| CN110006841A (en) * | 2019-04-11 | 2019-07-12 | 内蒙古神舟硅业有限责任公司 | O, C in a kind of granulated polycrystalline silicon, III, the detection method of group Ⅴ element |
Non-Patent Citations (1)
| Title |
|---|
| 苏丽娟等: "VOD精炼渣对Al2O3的溶解", 《过程工程学报》 * |
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