CN111690865B - Device and method for improving absorptivity of blown granular nodulizer - Google Patents
Device and method for improving absorptivity of blown granular nodulizer Download PDFInfo
- Publication number
- CN111690865B CN111690865B CN202010454599.1A CN202010454599A CN111690865B CN 111690865 B CN111690865 B CN 111690865B CN 202010454599 A CN202010454599 A CN 202010454599A CN 111690865 B CN111690865 B CN 111690865B
- Authority
- CN
- China
- Prior art keywords
- reaction chamber
- spray gun
- secondary reaction
- spheroidizing
- nodulizer
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000007921 spray Substances 0.000 claims abstract description 55
- 238000010517 secondary reaction Methods 0.000 claims abstract description 49
- 238000006243 chemical reaction Methods 0.000 claims abstract description 43
- 229910052742 iron Inorganic materials 0.000 claims abstract description 34
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 30
- 239000011777 magnesium Substances 0.000 claims abstract description 30
- 239000002245 particle Substances 0.000 claims abstract description 20
- 239000011148 porous material Substances 0.000 claims abstract description 17
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 5
- 239000004604 Blowing Agent Substances 0.000 claims 1
- 239000000779 smoke Substances 0.000 abstract description 3
- 239000000428 dust Substances 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000007086 side reaction Methods 0.000 description 18
- 239000000376 reactant Substances 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 230000008016 vaporization Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000011449 brick Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
- C22C33/10—Making cast-iron alloys including procedures for adding magnesium
- C22C33/12—Making cast-iron alloys including procedures for adding magnesium by fluidised injection
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a device for improving the absorptivity of a blown granular nodulizer, which comprises: the device comprises a spheroidizing bag, a spray gun and a secondary reaction chamber arranged in the spheroidizing bag, wherein the secondary reaction chamber is a cavity with a concave inner part, and an opening of the secondary reaction chamber is opposite to a nozzle of the spray gun; the invention also provides a method for improving the absorptivity of the blown granular nodulizer, which comprises the following steps of; s1, installing a spray gun on a spheroidizing cover, wherein the tail end of the spray gun is provided with a reaction chamber, and the upper end of the spray gun is connected with a conveying pipeline for passivating magnesium particles; s2, arranging a secondary reaction chamber in the spheroidizing bag; s3, the passivated magnesium particles which are not fully reacted in the nozzle reaction chamber are blown to the secondary reaction chamber, continue to react in the secondary reaction chamber and are sent to the spheroidizing bag through a gap between the pore canal arranged in the secondary reaction chamber and the nozzle reaction chamber and the secondary reaction chamber. The invention can obviously improve the absorptivity of the nodulizer, reduce the splash and smoke dust amount of molten iron and reduce the potential safety hazard and environmental hazard.
Description
Technical Field
The invention relates to the technical field of blowing spheroidization technology, in particular to a device and a method for improving the absorptivity of a blowing granular spheroidizer.
Background
At present, the main stream injection spheroidizing process is a magnesium injection spheroidizing process, which uses high-pressure inert gas (such as nitrogen) as a carrier, and adds passivated magnesium particles into molten iron through a pipeline and a special spray gun, wherein the passivated magnesium particles are gasified after encountering high-temperature molten iron in a spray gun reaction chamber, and magnesium reacts with oxygen, sulfur and the like in the molten iron, so that the molten iron is deoxidized and desulfurized to be continuously purified, thereby completing the spheroidizing process. Fig. 1 is a schematic diagram of a mainstream magnesium injection spheroidization process, which is taken as an example to illustrate the current mainstream process and the principle of the invention.
The current mainstream magnesium injection spheroidization process as shown in fig. 1 is as follows: firstly, adding molten iron to be spheroidized into a spheroidizing ladle 2, then inserting a spray gun 3 into the molten iron 4 to be spheroidized, then spraying passivated magnesium particles 5 into the molten iron 4 to be spheroidized through the spray gun 3 by utilizing high-pressure gas, enabling the passivated magnesium particles to be in contact with the molten iron in a reaction chamber 6, mixing, vaporizing and reacting, enabling magnesium particles without vaporization and magnesium vapor without absorption by the molten iron to be further in contact with the molten iron in the molten iron 4, mixing, vaporizing, reacting and floating, and finally enabling the magnesium vapor without absorption by the molten iron and the passivated magnesium particles without vaporization to float out of the molten iron level, and enabling the magnesium particles without vaporization to be in contact with air and react to generate magnesium oxide.
The magnesium spraying spheroidization process in the prior art has the following three problems: firstly, the absorption rate of magnesium is low, so that the waste of magnesium metal is serious; secondly, the reaction is severe, the molten iron splashing is large, and potential safety hazards exist; thirdly, the smoke dust is large and easy to cause environmental pollution, and the main reason for causing the problems is that the design of the reaction chamber is unreasonable.
In view of the above problems, it is desirable to provide a novel spheroidizing reaction device.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a device and a method for improving the absorptivity of a blown granular nodulizer.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
an apparatus for increasing the rate of absorption of a blown particulate nodulizer comprising: the device comprises a spheroidizing bag, a spray gun and a side reaction chamber arranged in the spheroidizing bag, wherein the side reaction chamber is a cavity with a concave inner part, and an opening of the side reaction chamber is opposite to a nozzle of the spray gun.
Preferably, the side reaction chamber may be arranged inside the balling package in a protruding or recessed manner, preferably at the bottom of the balling package.
Preferably, the spray gun is provided with a spray gun reaction chamber at the nozzle.
Preferably, the side wall of the spray gun reaction chamber is provided with a pore canal communicated with the spheroidizing bag.
Preferably, the side reaction chamber and the spray gun nozzle are tightly connected or arranged in a clearance way.
Preferably, the side reaction chamber is provided with a pore canal communicated with the spheroidizing bag.
Preferably, the duct is provided for clockwise or counterclockwise rotation.
Preferably, the pore channels are distributed radially from the interior of the side reaction chamber to the spheroidization package.
The invention also provides a method for improving the absorptivity of the blown granular nodulizer, which is characterized by comprising the following steps:
s1: the spray gun is arranged on the spheroidizing cover, the tail end of the spray gun is provided with a nozzle reaction chamber, and the upper end of the spray gun is connected with a conveying pipeline for passivating magnesium particles;
s2: pouring molten iron into the spheroidizing ladle, and transporting the molten iron to the position below a spheroidizing ladle cover;
s3: starting a spray gun to cover the spheroidizing ladle cover;
s4: communicating the conveying pipeline to blow the passivated magnesium particles to the nozzle reaction chamber;
s4: the passivated magnesium particles which are not fully reacted in the nozzle reaction chamber are blown into the secondary reaction chamber, continue to react in the secondary reaction chamber and are sent to the spheroidizing bag through a gap between the pore canal arranged in the secondary reaction chamber and the nozzle reaction chamber and the secondary reaction chamber.
The invention has the following beneficial effects:
1. the auxiliary reaction chamber is arranged at the opposite position of the spray gun, a pre-reaction space can be formed, the reactant and the molten iron are mixed in advance, and the mixture is dispersed to a spheroidizing bag through the auxiliary reaction chamber, so that the reaction rate is improved;
2. through arranging the pore canal in the secondary reaction chamber, a way for more comprehensively diffusing the reactant in the secondary reaction chamber to the spheroidizing ladle is provided, and meanwhile, the time for the reactant to contact with molten iron is increased by different arrangement modes of the pore canal, so that the spheroidizing reaction absorptivity is improved;
3. the pore canal in the auxiliary reaction chamber can be arranged in a clockwise or anticlockwise radial manner, the spray gun can rotate molten iron in the spheroidizing ladle through the pore canal of the reaction chamber in the injection process, and the reactant can also rotate and rise to improve the contact space and time between the reactant and the molten iron, so that the reactant absorptivity and reaction rate of spheroidizing reaction are greatly increased;
4. the reactant and the molten iron are firstly contacted in the side reaction chamber, and pass through a gap between the spray gun and the side reaction chamber or a pore canal of the side reaction chamber, so that the intensity of direct contact of the spheroidizing bag with the reactant is reduced, and the safety coefficient is improved.
Drawings
FIG. 1 is a schematic diagram of a current mainstream magnesium injection spheroidization process.
FIG. 2 is a schematic diagram of an embodiment of the process implementation of the present invention.
FIG. 3 is a schematic representation of the basic pattern of the mutual positions of the secondary reaction chamber and the spray gun.
FIG. 4 is a schematic diagram of the basic pattern of the side reaction chamber and the well
Fig. 1 illustrates:
1 spheroidizing ladle cover, 2 spheroidizing ladle, 3 spray guns, 4 molten iron, 5 passivated magnesium particles, 6 spray gun reaction chambers and 8 conveying pipelines
Fig. 2 illustrates:
1 spheroidizing ladle cover, 2 spheroidizing ladle, 3 spray guns, 4 molten iron, 5 passivated magnesium particles, 6 spray gun reaction chambers and 7 internal side reaction chambers
Fig. 3 illustrates:
1 spray gun, 2 side reaction chambers and 3-pack bottom bricks
FIG. 3a is a schematic view of a lance inserted into the secondary reaction chamber, FIG. 3b is a schematic view of a lance on the secondary reaction chamber
Fig. 4 illustrates:
1 side reaction chamber, 2 side reaction chamber open pore, 3 package bottom brick, 4 spiral hole, 5 rotation hole
FIG. 4a arc hole, FIG. 4b curve hole or spiral hole, FIG. 4c inclined hole
FIG. 4a shows an integrated side reaction chamber, and FIGS. 4b and 4c show a shaped brick-type side reaction chamber
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Example 1
As shown in fig. 2, a secondary reaction chamber 7 is arranged at the bottom of the spheroidizing ladle 2, the secondary reaction chamber 7 is of a concave revolving body structure with an upward opening, and is opposite to the outlet of the spray gun reaction chamber 6 on the spray gun 3, and gaps are reserved between the secondary reaction chamber 7 and the outlet of the spray gun reaction chamber, so that molten iron and air flow can enter and exit the space surrounded by the spray gun reaction chamber and the secondary reaction chamber. The spray gun 3 is arranged on the spheroidizing ladle cover 1, the tail end of the spray gun 3 is provided with a reaction chamber 6, and the upper end of the spray gun is connected with a conveying pipeline 8 for passivating magnesium particles.
The side wall of the secondary reaction chamber 7 is provided with through holes or grooves (shown in fig. 4) which are radially distributed from inside to outside to form channels for spraying molten iron, magnesium vapor, carrier gas and passivated magnesium particle mixture out of the secondary reaction chamber.
Example two
As shown in fig. 3b, the spray gun reaction chamber is arranged at the upper end of the secondary reaction chamber, the carrier gas and magnesium particles react with molten iron in the spray gun reaction chamber through the spray gun, then flow out from the gap between the spray gun reaction chamber and the secondary reaction chamber or flow out through the pore canal after re-reaction in the secondary reaction chamber and enter the spheroidizing ladle, and the contact degree of the reactant and the molten iron in the spheroidizing ladle can be enlarged through different paths.
Example III
As shown in fig. 4a and 4c, the side walls of the secondary reaction chamber may be formed in different shapes, and the channels are formed in the side walls of the secondary reaction chamber, preferably in the bottom of the secondary reaction chamber, and the channels are arranged in a radial arrangement from the secondary reaction chamber to the spheroidizing direction, and the channels are rotatably arranged clockwise or anticlockwise.
Example IV
As shown in fig. 4b, in order to increase the contact time of the reactant with the molten iron, the channel may be provided in a curved shape, increasing the path length, and improving the reaction efficiency.
Example five
As shown in the figures (added figures), the openings of the channels may be provided at the bottom of the secondary reaction chamber, upwards through the bottom of the balling package.
In the drawings, the secondary reaction chamber 7 and the ladle bottom are integrated, but the secondary reaction chamber is not limited to the integral, and the secondary reaction chamber can be embedded into the ladle bottom when being made into prefabricated forming bricks for use; and the secondary reaction chamber 7 and the hole grooves on the side wall thereof can be of various types.
The position of the secondary reaction chamber in the invention is not limited to the bottom of the bag, but the bottom of the bag is preferable, the secondary reaction chamber can be arranged at different positions in the bag according to the position of the nozzle, and the opening of the secondary reaction chamber corresponds to the outlet of the spray gun. The patent of spheroidizing process for molten iron by blowing granular spheroidizing agent (patent number: CN 101768692A) describes that the nozzle (i.e. the outlet of the spray gun of the invention) can be arranged at different positions in the spheroidizing ladle according to actual needs.
Compared with the original spheroidizing process of blowing the granular spheroidizing agent, the invention can obviously improve the absorptivity of the spheroidizing agent; by adding the side reaction chamber in the nodulizing ladle, the reaction space of the nodulizing agent is increased, the residence time and the contact area of the nodulizing agent in the molten iron are prolonged, the absorptivity of the nodulizing agent is improved, and the production cost is reduced; the molten iron splashing is less in the reaction process, the spheroidization process is stable, and the method is safer; the smoke generated by the reaction is less, and the method is more environment-friendly.
The present invention is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present invention and the inventive concept thereof, can be replaced or changed within the scope of the present invention.
Claims (4)
1. An apparatus for increasing the rate of absorption of a particulate blowing agent, comprising: the device comprises a spheroidizing bag, a spray gun and a secondary reaction chamber arranged in the spheroidizing bag, wherein the secondary reaction chamber is a cavity with a concave inner part, and an opening of the secondary reaction chamber is opposite to a nozzle of the spray gun;
the spray gun is provided with a spray gun reaction chamber at the nozzle;
the side wall of the spray gun reaction chamber is provided with a first pore canal communicated with the spheroidizing bag;
the secondary reaction chamber is provided with a second pore canal communicated with the spheroidizing bag;
the second pore canal is radially distributed from the interior of the secondary reaction chamber to the spheroidizing bag;
the second pore canal is arranged in a clockwise or anticlockwise rotation way.
2. The apparatus for increasing the absorptivity of the blown particulate nodulizer according to claim 1, wherein the secondary reaction chamber is provided inside the nodulizer in a protruding or recessed manner.
3. The apparatus of claim 1, wherein the secondary reaction chamber is closely connected to the nozzle of the spray gun or is disposed in a gap.
4. A method of increasing the absorptivity of a blown particulate nodulizer using an apparatus for increasing the absorptivity of a blown particulate nodulizer according to any one of claims 1 to 3, comprising the steps of:
s1: the spray gun is arranged on the spheroidizing cover, the tail end of the spray gun is provided with a spray gun reaction chamber, and the upper end of the spray gun is connected with a conveying pipeline for passivating magnesium particles;
s2: pouring molten iron into the spheroidizing ladle, and transporting the molten iron to the position below a spheroidizing ladle cover;
s3: starting a spray gun to cover the spheroidizing ladle cover;
s4: communicating the conveying pipeline, and blowing the passivated magnesium particles to a spray gun reaction chamber;
s5: the passivated magnesium particles which are not fully reacted in the spray gun reaction chamber are blown to the secondary reaction chamber, continue to react in the secondary reaction chamber and are sent to the spheroidizing bag through a gap between the secondary reaction chamber and the spray gun reaction chamber through a second pore canal arranged in the secondary reaction chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010454599.1A CN111690865B (en) | 2020-05-26 | 2020-05-26 | Device and method for improving absorptivity of blown granular nodulizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010454599.1A CN111690865B (en) | 2020-05-26 | 2020-05-26 | Device and method for improving absorptivity of blown granular nodulizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111690865A CN111690865A (en) | 2020-09-22 |
| CN111690865B true CN111690865B (en) | 2024-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010454599.1A Active CN111690865B (en) | 2020-05-26 | 2020-05-26 | Device and method for improving absorptivity of blown granular nodulizer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112404372B (en) * | 2020-11-20 | 2021-12-14 | 国铭铸管股份有限公司 | Speed-controlled rotational flow spheroidizing method for nodular cast iron in ladle |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4034970A (en) * | 1976-01-28 | 1977-07-12 | General Motors Corporation | Method and device for nodularizing cast iron |
| US4391636A (en) * | 1981-12-16 | 1983-07-05 | Wintec Company | Method of and apparatus for the production of nodular (ductile) cast iron |
| US5413315A (en) * | 1993-04-14 | 1995-05-09 | Norsk Hydro A.S. | Injection equipment |
| JPH09125129A (en) * | 1995-10-31 | 1997-05-13 | Kawasaki Steel Corp | Ladle refining apparatus for molten metal and method thereof |
| CN200955063Y (en) * | 2006-10-19 | 2007-10-03 | 新兴铸管股份有限公司 | Spraying-blowing magnesium-grain molten-iron nodulizing equipment |
| CN203470886U (en) * | 2013-08-14 | 2014-03-12 | 肇庆精通机械有限公司 | Nodulizing bag |
| WO2014134762A1 (en) * | 2013-03-04 | 2014-09-12 | 天津市万路科技有限公司 | Nodularization method for nodular cast iron |
| CN107267711A (en) * | 2017-04-24 | 2017-10-20 | 鞍钢股份有限公司 | The molten steel alloying device and alloyage process of a kind of rotary blowing pulvis |
| CN207498406U (en) * | 2017-09-13 | 2018-06-15 | 新兴铸管股份有限公司 | A kind of nodularization packet |
| CN110711858A (en) * | 2019-10-28 | 2020-01-21 | 任冲 | Iron-based master alloy powder balling device |
| CN110714108A (en) * | 2019-10-31 | 2020-01-21 | 新兴铸管股份有限公司 | Method and device for improving magnesium absorption rate in nodular cast iron spheroidizing process |
| CN213142149U (en) * | 2020-05-26 | 2021-05-07 | 新兴河北工程技术有限公司 | Device for improving absorption rate of blowing granular nodulizer |
-
2020
- 2020-05-26 CN CN202010454599.1A patent/CN111690865B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4034970A (en) * | 1976-01-28 | 1977-07-12 | General Motors Corporation | Method and device for nodularizing cast iron |
| US4391636A (en) * | 1981-12-16 | 1983-07-05 | Wintec Company | Method of and apparatus for the production of nodular (ductile) cast iron |
| US5413315A (en) * | 1993-04-14 | 1995-05-09 | Norsk Hydro A.S. | Injection equipment |
| JPH09125129A (en) * | 1995-10-31 | 1997-05-13 | Kawasaki Steel Corp | Ladle refining apparatus for molten metal and method thereof |
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| WO2014134762A1 (en) * | 2013-03-04 | 2014-09-12 | 天津市万路科技有限公司 | Nodularization method for nodular cast iron |
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| CN107267711A (en) * | 2017-04-24 | 2017-10-20 | 鞍钢股份有限公司 | The molten steel alloying device and alloyage process of a kind of rotary blowing pulvis |
| CN207498406U (en) * | 2017-09-13 | 2018-06-15 | 新兴铸管股份有限公司 | A kind of nodularization packet |
| CN110711858A (en) * | 2019-10-28 | 2020-01-21 | 任冲 | Iron-based master alloy powder balling device |
| CN110714108A (en) * | 2019-10-31 | 2020-01-21 | 新兴铸管股份有限公司 | Method and device for improving magnesium absorption rate in nodular cast iron spheroidizing process |
| CN213142149U (en) * | 2020-05-26 | 2021-05-07 | 新兴河北工程技术有限公司 | Device for improving absorption rate of blowing granular nodulizer |
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| 球墨铸铁管镁芯线球化处理工艺研究;王黎晖等;现代铸铁(02);1-2 * |
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| CN111690865A (en) | 2020-09-22 |
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