CN116694845A - Preparation method of low-boron nodulizer - Google Patents
Preparation method of low-boron nodulizer Download PDFInfo
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- CN116694845A CN116694845A CN202310804827.7A CN202310804827A CN116694845A CN 116694845 A CN116694845 A CN 116694845A CN 202310804827 A CN202310804827 A CN 202310804827A CN 116694845 A CN116694845 A CN 116694845A
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- China
- Prior art keywords
- boron
- parts
- raw materials
- nodulizer
- low
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- 229910052796 boron Inorganic materials 0.000 title claims abstract description 71
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000003723 Smelting Methods 0.000 claims abstract description 36
- 239000002994 raw material Substances 0.000 claims abstract description 32
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 20
- 239000011777 magnesium Substances 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 17
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 17
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 16
- 239000011575 calcium Substances 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 4
- 239000010959 steel Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 229910052710 silicon Inorganic materials 0.000 claims description 13
- 239000010703 silicon Substances 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 9
- 230000007935 neutral effect Effects 0.000 claims description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 229910052729 chemical element Inorganic materials 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000000643 oven drying Methods 0.000 claims description 3
- 229910001141 Ductile iron Inorganic materials 0.000 description 8
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 4
- 239000004327 boric acid Substances 0.000 description 4
- 238000010587 phase diagram Methods 0.000 description 4
- 239000007767 bonding agent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011159 matrix material Chemical group 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
Classifications
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The application provides a preparation method of a low-boron spheroidizing agent, which belongs to the technical field of spheroidizing agents, and comprises the following steps: step one: mixing various raw materials according to a certain proportion, wherein the required raw materials comprise magnesium ingots, calcium metal, ferrosilicon, scrap steel, rare earth and aluminum, and the raw materials are mixed in a batching way through an automatic batching system; step two: conveying the prepared raw materials into a smelting furnace through a conveying system for smelting; step three: in the original smelting process of the smelting furnace, the temperature in the furnace needs to be measured continuously, and the temperature is monitored. By adopting the preparation method of the nodulizer, the low-boron nodulizer with the boron content of less than 40ppm can be prepared.
Description
Technical Field
The application relates to the technical field of nodulizers, in particular to a preparation method of a low-boron nodulizer.
Background
Spheroidizing agents are certain metals or alloys added to the molten iron in order to obtain spheroidal graphite cast iron. The ferrosilicon rare earth magnesium nodulizer is commonly used in China. The production process of the nodulizer comprises hot remelting, low-silicon pelleting and the like; the spheroidizing agent is combined with the influence of elements in the spheroidizing agent on spheroidizing effect, the proportion is reasonable, the production process is optimized, the quality of spheroidal graphite cast iron is improved, the quality of the spheroidal graphite cast iron is continuously researched by casting workers, and along with the continuous improvement of the quality of products by customers, the spheroidizing agent in the current market cannot meet the production of special ball-milled cast iron due to the large boron content. The boron content in the nodulizer in the current market is generally above 60ppm, and the production of special ball-milling cast iron cannot be satisfied. Since trace elements in the nodulizer have a large influence on the nodulizing quality, such as the influence of boron elements in the nodulizer on graphite and matrix structure, the boron content in the nodulizer must be controlled, and how to produce the nodulizer with boron content below 50ppm is a technical problem.
Disclosure of Invention
In view of the above, the present application provides a method for preparing a low-boron spheroidizing agent, which solves the problem that a spheroidizing agent below 50ppm cannot be produced in the prior art.
In order to solve the technical problems, the preparation method of the low-boron nodulizer provided by the application adopts the following technical scheme:
the preparation method of the low-boron nodulizer comprises the following steps:
step one: mixing various raw materials according to a certain proportion, wherein the required raw materials comprise magnesium ingots, calcium metal, ferrosilicon, scrap steel, rare earth and aluminum, and the raw materials are mixed in a batching way through an automatic batching system;
step two: conveying the prepared raw materials into a smelting furnace through a conveying system for smelting;
step three: in the original smelting process of the smelting furnace, the temperature in the furnace needs to be measured continuously, and the temperature is monitored.
Step four: casting and ingot making are carried out after smelting is completed;
step five: after ingot production is completed, the sealed anaerobic rapid condensing device is used for cooling in time, so that ineffective magnesium in a metal ingot is reduced, and the product quality is more stable and controllable;
step six: after the metal ingot is cooled, crushing is carried out by adopting crushing equipment, so that the metal ingot is crushed into a certain particle size, and the particle size of the particles can be crushed according to the requirements of customers;
step seven: checking after crushing is finished to ensure the quality of the product;
step eight: after the detection is finished, the product batch is stored and is waited for use.
Further, in order to avoid that a large amount of boron element is contained in the smelting furnace, the preparation method of the smelting furnace comprises the following steps:
(1) Firstly, mixing furnace burden and binder;
(2) Building a furnace lining;
(3) Hardening with carbon dioxide for 15 minutes;
(4) Oven drying for 6-8 hr.
Further, the smelting furnace is made of neutral materials, and the PH value of the neutral materials is=7.
Further, the chemical elements contained in the nodulizer are silicon, magnesium, rare earth, calcium, aluminum and boron.
Further, the parts of the raw materials contained in the nodulizer are as follows: 40-50 parts of silicon, 5-8 parts of magnesium, 0.5-2 parts of rare earth, 0.8-2 parts of calcium, 0.3-1 part of aluminum and less than 40ppm of boron.
Further, the parts of the raw materials contained in the nodulizer are as follows: 40 parts of silicon, 5 parts of magnesium, 0.5 part of rare earth, 0.8 part of calcium, 0.3 part of aluminum and less than 40ppm of boron.
Further, 50 parts of silicon, 8 parts of magnesium, 2 parts of rare earth, 2 parts of calcium, 1 part of aluminum and less than 40ppm of boron.
The technical scheme of the application at least comprises the following beneficial effects:
by adopting the preparation method of the nodulizer, the low-boron nodulizer with the boron content of less than 40ppm can be prepared. The long-time research shows that the raw materials for producing the nodulizer do not influence the increase of the boron content, but in a smelting furnace used in the production process, common materials (non-neutral materials) adopted by the current smelting furnace are mixed with boric acid binders to further cause boron elements in a furnace lining, so that the boron elements in the furnace lining are mixed into the raw materials to be smelted together in the process of smelting the nodulizer raw materials by adopting the common smelting furnace, and the boron content in the nodulizer is further improved. According to the application, through improvement of smelting furnace materials, namely, the furnace materials are replaced by neutral materials, the PH value of the furnace materials is=7, the furnace materials are mixed with the bonding agent containing boric acid, chemical reaction is formed between the furnace materials and the bonding agent containing boric acid, so that boron elements in the bonding agent containing boric acid are reduced, when the smelting furnace is used for smelting raw materials of the nodulizer again, the boron content in the raw materials is not increased, and the low-boron nodulizer with the boron content of less than 40ppm can be produced by changing the smelting furnace materials and then producing the nodulizer through the process.
Drawings
The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present application will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. In the drawings, embodiments of the application are illustrated by way of example and not by way of limitation, and like reference numerals refer to similar or corresponding parts and in which:
FIG. 1 is a diagram of the phase of a low boron nodulizer of the application in an unetched state with a boron content of 0.004% in a clamping application;
FIG. 2 is a diagram of the phase of the low boron nodulizer of the application in an unetched state with a boron content of 0.007% in a clamping application;
FIG. 3 is a diagram of the phase of the low boron nodulizer of the application in a corrosive state with a boron content of 0.004% in a clamping application;
fig. 4 is a graph of the phase of the low boron spheroidizing agent of the present application in a corrosive state with a boron content of 0.007% in a clamp application.
Detailed Description
The following description of the embodiments of the present application will be made more complete and clear to those skilled in the art by reference to the figures of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Example 1 of the preparation method of the low-boron nodulizer provided by the application is as follows:
the preparation method of the low-boron nodulizer comprises the following steps:
step one: mixing various raw materials according to a certain proportion, wherein the required raw materials comprise magnesium ingots, calcium metal, ferrosilicon, scrap steel, rare earth and aluminum, and the raw materials are mixed in a batching way through an automatic batching system;
step two: conveying the prepared raw materials into a smelting furnace through a conveying system for smelting;
step three: in the original smelting process of the smelting furnace, the temperature in the furnace needs to be measured continuously, and the temperature is monitored.
Step four: casting and ingot making are carried out after smelting is completed;
step five: after ingot production is completed, the sealed anaerobic rapid condensing device is used for cooling in time, so that ineffective magnesium in a metal ingot is reduced, and the product quality is more stable and controllable;
step six: after the metal ingot is cooled, crushing is carried out by adopting crushing equipment, so that the metal ingot is crushed into a certain particle size, and the particle size of the particles can be crushed according to the requirements of customers;
step seven: checking after crushing is finished to ensure the quality of the product;
step eight: after the detection is finished, the product batch is stored and is waited for use.
In order to avoid that the smelting furnace contains a large amount of boron elements, the preparation method of the smelting furnace comprises the following steps:
(1) Firstly, mixing furnace burden and binder;
(2) Building a furnace lining;
(3) Hardening with carbon dioxide for 15 minutes;
(4) Oven drying for 6-8 hr.
The smelting furnace is made of neutral materials, wherein the PH value of the neutral materials is=7.
The chemical elements contained in the nodulizer prepared from the raw materials include silicon, magnesium, rare earth, calcium, aluminum and boron.
The nodulizer comprises the following raw materials in parts by weight: 40 parts of silicon, 5 parts of magnesium, 0.5 part of rare earth, 0.8 part of calcium, 0.3 part of aluminum and less than 40ppm of boron.
The low-boron nodulizer produced by the preparation method and the raw materials is applied to the clamp as follows:
the golden phase diagram of the clamp in the non-corroded state with the boron content of 0.004% can be shown with reference to figure 1.
The golden phase diagram of the clamp in the non-corroded state at a boron content of 0.007% is shown with reference to figure 2.
The golden phase diagram of the clip in the corrosion state with boron content of 0.004% can be shown with reference to fig. 3.
The golden phase diagram of the clip in the corrosion state with a boron content of 0.007% is shown with reference to fig. 4.
In addition, table 1 below is an analytical table of graphite morphology of spheroidal graphite cast iron treated with spheroidizers of varying boron content
Table 2 below shows the tensile strength of spheroidal graphite cast iron treated with spheroidizing agents of different boron contents
Table 3 below shows the elongation of spheroidal graphite cast iron treated with spheroidizing agents of different boron contents
Table 4 below shows the hardness of spheroidal graphite cast iron treated with spheroidizing agents of different boron contents
Table 5 below shows the impact energy of spheroidal graphite cast iron treated with spheroidizing agents of different boron contents
By adopting the preparation method and the raw material proportion, the low-boron nodulizer with the boron content of less than 40ppm can be produced, and the low-boron nodulizer can also produce good effect in practical application. Meanwhile, the market demand can be met.
Example 2 of the preparation method of the low-boron nodulizer provided by the application is as follows:
the nodulizer comprises the following raw materials in parts by weight: 50 parts of silicon, 8 parts of magnesium, 2 parts of rare earth, 2 parts of calcium, 1 part of aluminum and less than 40ppm of boron.
Example 3 of the preparation method of the low-boron nodulizer provided by the application is as follows:
the nodulizer comprises the following raw materials in parts by weight: 48 parts of silicon, 7 parts of magnesium, 1 part of rare earth, 1 part of calcium, 0.8 part of aluminum and less than 40ppm of boron.
While the application has been described in detail with reference to the drawings and examples, it will be understood by those skilled in the art that various changes in the specific parameters of the examples may be made without departing from the spirit of the application, and the specific examples are common variations of the application and will not be described in detail herein.
Claims (8)
1. A preparation method of a low-boron nodulizer is characterized by comprising the following steps: the method comprises the following steps:
step one: mixing various raw materials according to a certain proportion, wherein the required raw materials comprise magnesium ingots, calcium metal, ferrosilicon, scrap steel, rare earth and aluminum, and the raw materials are mixed in a batching way through an automatic batching system;
step two: conveying the prepared raw materials into a smelting furnace through a conveying system for smelting;
step three: in the original smelting process of the smelting furnace, the temperature in the furnace needs to be measured continuously, and the temperature is monitored.
2. Step four: casting and ingot making are carried out after smelting is completed;
step five: after ingot production is completed, the sealed anaerobic rapid condensing device is used for cooling in time, so that ineffective magnesium in a metal ingot is reduced, and the product quality is more stable and controllable;
step six: after the metal ingot is cooled, crushing is carried out by adopting crushing equipment, so that the metal ingot is crushed into a certain particle size, and the particle size of the particles can be crushed according to the requirements of customers;
step seven: checking after crushing is finished to ensure the quality of the product;
step eight: after the detection is finished, the product batch is stored and is waited for use.
3. The method for producing a low-boron spheroidizing agent according to claim 1, wherein: in order to avoid the inclusion of a large amount of boron elements in the smelting furnace, the preparation method of the smelting furnace comprises the following steps:
(1) Firstly, mixing furnace burden and binder;
(2) Building a furnace lining;
(3) Hardening with carbon dioxide for 15 minutes;
(4) Oven drying for 6-8 hr.
4. The method for producing a low-boron spheroidizing agent according to claim 2, wherein: the smelting furnace is made of neutral materials, and the PH value of the neutral materials is=7.
5. The method for producing a low-boron spheroidizing agent according to claim 1, wherein: the chemical elements contained in the nodulizer are silicon, magnesium, rare earth, calcium, aluminum and boron.
6. The method for producing a low-boron spheroidizing agent according to claim 4, wherein: the nodulizer comprises the following raw materials in parts by weight: 40-50 parts of silicon, 5-8 parts of magnesium, 0.5-2 parts of rare earth, 0.8-2 parts of calcium, 0.3-1 part of aluminum and less than 40ppm of boron.
7. The method for producing a low-boron spheroidizing agent according to claim 5, wherein: the nodulizer comprises the following raw materials in parts by weight: 40 parts of silicon, 5 parts of magnesium, 0.5 part of rare earth, 0.8 part of calcium, 0.3 part of aluminum and less than 40ppm of boron.
8. The method for producing a low-boron spheroidizing agent according to claim 5, wherein: the nodulizer comprises the following raw materials in parts by weight: 50 parts of silicon, 8 parts of magnesium, 2 parts of rare earth, 2 parts of calcium, 1 part of aluminum and less than 40ppm of boron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310804827.7A CN116694845A (en) | 2023-07-03 | 2023-07-03 | Preparation method of low-boron nodulizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310804827.7A CN116694845A (en) | 2023-07-03 | 2023-07-03 | Preparation method of low-boron nodulizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116694845A true CN116694845A (en) | 2023-09-05 |
Family
ID=87837375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310804827.7A Pending CN116694845A (en) | 2023-07-03 | 2023-07-03 | Preparation method of low-boron nodulizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116694845A (en) |
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2023
- 2023-07-03 CN CN202310804827.7A patent/CN116694845A/en active Pending
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