CN102433490A - Spheroidization process for large-scale nodular iron castings - Google Patents
Spheroidization process for large-scale nodular iron castings Download PDFInfo
- Publication number
- CN102433490A CN102433490A CN2011103898126A CN201110389812A CN102433490A CN 102433490 A CN102433490 A CN 102433490A CN 2011103898126 A CN2011103898126 A CN 2011103898126A CN 201110389812 A CN201110389812 A CN 201110389812A CN 102433490 A CN102433490 A CN 102433490A
- Authority
- CN
- China
- Prior art keywords
- casting ladle
- shadoof
- molten iron
- nodulizing agent
- iron
- 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.)
- Pending
Links
Abstract
The invention relates to a nodularization process, in particular to a spheroidization process for large-scale nodular iron castings, which is characterized in that the process comprises the following steps of pouring ladle preparation, lifting rod manufacture, pouring ladle preheating, nodulizing agent placement, lifting rod placement, silica sand coverage, furnace delivery, nodularization reaction and slag removal. The spheroidization process has the advantages that through strictly controlling the nodularization reaction starting time and the reaction temperature, the nodularization metallurgical quality is kept accordant, so the product quality is ensured.
Description
Technical field
The present invention relates to a kind of spheriodizing technique, especially relate to a kind of spheriodization process thereof of large-scale magnesium iron spare.
Background technology
Produce large-scale magnesium iron spare spheriodization process thereof commonly used at present both at home and abroad and be called the method for pouring, promptly put into nodulizing agent, cover one deck steel disc or refractory materials above, in molten iron is poured casting ladle into, just react after the covering material fusing with nodulizing agent in the casting ladle bottom.The time and the temperature of this method molten iron and nodulizing agent reaction are not easy control, and be sometimes early late sometimes, thereby cause the difference of nodulizing agent specific absorption, and effect is also different, and the metallurgical quality of molten iron is also bigger with regard to difference, unstable product quality.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, thus provide a kind of through strictness control spheroidizing reacion time opening and temperature of reaction, make the be consistent a kind of spheriodization process thereof of large-scale magnesium iron spare of quality of assurance product of nodularization metallurgical quality.
The present invention realizes through following method:
A kind of spheriodization process thereof of large-scale magnesium iron spare is characterized in that: this technology comprises the steps:
A. casting ladle is prepared: make a pit or build dykes and dams with refractory brick in the casting ladle bottom;
B. shadoof is made: making a pre-buried termination is " T " shape, and another termination is the annular shadoof;
C. casting ladle preheating: preheating makes the interior temperature of casting ladle reach 200～300 ℃, makes the casting ladle complete drying;
D. place nodulizing agent: with the nodulizing agent particle, be placed in the side or pit of above-mentioned dykes and dams, and compacting, place a layer thickness above that again for handling 0.6～1.0% nucleating agent of weight of molten iron, and compacting, and cover with plain paper;
E. place shadoof, silica sand covering: " T " head of above-mentioned shadoof is placed on the said paper, and then covers the dried silica sand of one deck, this dried silica sand silicon-dioxide reaches more than 90%, and silicon sand layer thickness is 80～100mm;
F. come out of the stove: the molten metal that fusing is good in the stove is poured in the casting ladle at 1450～1500 ℃, and molten iron can not directly face toward the tectum of nodulizing agent during injection;
G. spheroidizing reacion, when molten iron go out to total weight of molten iron 1/2～2/3 the time, pull-up shadoof when molten iron temperature is 1420 ° of C～1470 ℃ in the casting ladle, the covering material shell breaks, molten iron contacts immediately with nodulizing agent and reacts, spheroidizing reacion begins;
H. slagging-off: remove covering material and float to the slags that surface and other spheroidizing reacions produce in reaction process, spheriodizing technique is accomplished, and the intact molten iron of nodularization can carry out next step metallurgical processing;
The degree of depth of said pit or dykes and dams height are for adorning 1.2～1.5% the nodulizing agent weight that casting ladle fills with weight of molten iron;
The pre-buried termination of said shadoof is that the main structure of " T " shape is the carbon steel rod iron, and shadoof bar portion puts a plurality of refractory pipes, and each vitrified pipe length is no more than 100mm.
The present invention has following effect:
1) process method is unique: the process method provided by the invention a. casting ladle that has the following steps is prepared: make a pit or build dykes and dams with refractory brick in the casting ladle bottom; B. shadoof is made: making a pre-buried termination is " T " shape, and another termination is the annular shadoof; C. casting ladle preheating: preheating makes the interior temperature of casting ladle reach 200～300 ℃, makes the casting ladle complete drying; D. place nodulizing agent: with the nodulizing agent particle, be placed in the side or pit of above-mentioned dykes and dams, and compacting, place a layer thickness above that again for handling 0.6～1.0% nucleating agent of weight of molten iron, and compacting, and with paper (covering; E. place shadoof, silica sand covers: " T " head of above-mentioned shadoof is placed on the paper, and then covers the dried silica sand of one deck, its silicon-dioxide reaches more than 90%, and silicon sand layer thickness is 80～100mm; F. come out of the stove: the molten metal that fusing is good in the stove is poured in the casting ladle at 1450～1500 ℃, and molten iron can not directly face toward the tectum of nodulizing agent during injection; G. spheroidizing reacion, when molten iron go out to total weight of molten iron 1/2～2/3 the time, temperature is the pull-up shadoof in the time of 1420～1470 ℃, the covering material shell breaks, molten iron contacts immediately with nodulizing agent and reacts, spheroidizing reacion begins; H. slagging-off: remove covering material and float to the slags that surface and other spheroidizing reacions produce in reaction process, spheriodizing technique is accomplished, and the intact molten iron of nodularization can carry out next step metallurgical processing.
2) control the time that spheroidizing reacion begins well: technology provided by the invention is exactly to make a pit in the bottom of casting ladle or in the middle of the casting ladle bottom, build one dykes and dams with the bottom separated into two parts; The nodulizing agent of some amount is placed in the pit or is placed on a side of dykes and dams, covering skim inert particle material it on.Will the termination of a shadoof be embedded under the coverture simultaneously, molten iron injects in the casting ladle, and at the time pulling pull bar of confirming, spheroidizing reacion begins, thereby reaches the time that spheroidizing reacion begins of controlling well.
3) constant product quality: spheriodizing technique provided by the invention can be controlled the time and the temperature of reaction of spheroidizing reacion well less than 0.03% molten metal for S content; Spheroidizing reacion can be controlled well; The nodulizing agent specific absorption is high, and the nodularization rate is stable, thereby makes quality product reach stable.
Embodiment
A kind of spheriodization process thereof of large-scale magnesium iron spare is characterized in that: this technology comprises the steps:
A. casting ladle is prepared: make a pit or build dykes and dams with refractory brick in the casting ladle bottom;
B. shadoof is made: making a pre-buried termination is " T " shape, and another termination is the annular shadoof;
C. casting ladle preheating: preheating makes the interior temperature of casting ladle reach 200～300 ℃, makes the casting ladle complete drying;
D. place nodulizing agent: with the nodulizing agent particle, be placed in the side or pit of above-mentioned dykes and dams, and compacting, place a layer thickness above that again for handling 0.6～1.0% nucleating agent of weight of molten iron, and compacting, and cover with plain paper;
E. place shadoof, silica sand covering: " T " head of above-mentioned shadoof is placed on the said paper, and then covers the dried silica sand of one deck, this dried silica sand silicon-dioxide reaches more than 90%, and silicon sand layer thickness is 80～100mm;
F. come out of the stove: the molten metal that fusing is good in the stove is poured in the casting ladle at 1450～1500 ℃, and molten iron can not directly face toward the tectum of nodulizing agent during injection;
G. spheroidizing reacion, when molten iron go out to total weight of molten iron 1/2～2/3 the time, pull-up shadoof when molten iron temperature is 1420 ° of C～1470 ℃ in the casting ladle, the covering material shell breaks, molten iron contacts immediately with nodulizing agent and reacts, spheroidizing reacion begins;
H. slagging-off: remove covering material and float to the slags that surface and other spheroidizing reacions produce in reaction process, spheriodizing technique is accomplished, and the intact molten iron of nodularization can carry out next step metallurgical processing.
The pit that above-mentioned pit can have any shape, its degree of depth or dykes and dams height are for adorning 1.2～1.5% the nodulizing agent weight that casting ladle fills with weight of molten iron.
The pre-buried termination of said shadoof is that the main structure of " T " shape is the carbon steel rod iron, and shadoof bar portion puts a plurality of refractory pipes, and each vitrified pipe length is no more than 100mm.
Claims (3)
1. the spheriodization process thereof of a large-scale magnesium iron spare, it is characterized in that: this technology comprises the steps:
A. casting ladle is prepared: make a pit or build dykes and dams with refractory brick in the casting ladle bottom;
B. shadoof is made: making a pre-buried termination is " T " shape, and another termination is the annular shadoof;
C. casting ladle preheating: preheating makes the interior temperature of casting ladle reach 200～300 ℃, makes the casting ladle complete drying;
D. place nodulizing agent: with the nodulizing agent particle, be placed in the side or pit of above-mentioned dykes and dams, and compacting, place a layer thickness above that again for handling 0.6～1.0% nucleating agent of weight of molten iron, and compacting, and cover with plain paper;
E. place shadoof, silica sand covering: " T " head of above-mentioned shadoof is placed on the said paper, and then covers the dried silica sand of one deck, this dried silica sand silicon-dioxide reaches more than 90%, and silicon sand layer thickness is 80～100mm;
F. come out of the stove: the molten metal that fusing is good in the stove is poured in the casting ladle at 1450～1500 ℃, and molten iron can not directly face toward the tectum of nodulizing agent during injection;
G. spheroidizing reacion, when molten iron go out to total weight of molten iron 1/2～2/3 the time, molten iron temperature pull-up shadoof in the time of 1420 ℃～1470 ℃ in the casting ladle, the covering material shell breaks, molten iron contacts immediately with nodulizing agent and reacts, spheroidizing reacion begins;
H. slagging-off: remove covering material and float to the slags that surface and other spheroidizing reacions produce in reaction process, spheriodizing technique is accomplished, and the intact molten iron of nodularization can carry out next step metallurgical processing.
2. the spheriodization process thereof of a kind of large-scale magnesium iron spare as claimed in claim 1 is characterized in that: the degree of depth of said pit or dykes and dams height are for adorning 1.2～1.5% the nodulizing agent weight that casting ladle fills with weight of molten iron.
3. the spheriodization process thereof of a kind of large-scale magnesium iron spare as claimed in claim 1; It is characterized in that: the pre-buried termination of said shadoof is that the main structure of " T " shape is the carbon steel rod iron; Shadoof bar portion puts a plurality of refractory pipes, and each vitrified pipe length is no more than 100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103898126A CN102433490A (en) | 2011-11-30 | 2011-11-30 | Spheroidization process for large-scale nodular iron castings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103898126A CN102433490A (en) | 2011-11-30 | 2011-11-30 | Spheroidization process for large-scale nodular iron castings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102433490A true CN102433490A (en) | 2012-05-02 |
Family
ID=45981836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103898126A Pending CN102433490A (en) | 2011-11-30 | 2011-11-30 | Spheroidization process for large-scale nodular iron castings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102433490A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115124355A (en) * | 2022-07-21 | 2022-09-30 | 新乡市固元陶瓷科技有限公司 | Method for burning large-size ceramic spheres in buried mode |
-
2011
- 2011-11-30 CN CN2011103898126A patent/CN102433490A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 无锡柴油机厂: "触发法球化处理工艺的试验研究", 《现代铸铁》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115124355A (en) * | 2022-07-21 | 2022-09-30 | 新乡市固元陶瓷科技有限公司 | Method for burning large-size ceramic spheres in buried mode |
| CN115124355B (en) * | 2022-07-21 | 2023-09-01 | 新乡市固元陶瓷科技有限公司 | Method for burying and burning large-size ceramic spheres |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105195714B (en) | A kind of internal layer Q345B outer layers 40Cr is combined ring casting and rolles over manufacturing process | |
| CN100354562C (en) | High alloy steel seamless steel pipe and production method thereof | |
| CN102886501B (en) | Tooling for efficiently manufacturing wide thick plate blank for wide thick plate rolling machine and manufacture method thereof | |
| CN105364028B (en) | A kind of spheroidal graphite cast-iron nodularization handles the building method of bag dykes and dams | |
| CN108213323A (en) | A kind of locking contracting casting method of differential carrier | |
| CN102310187A (en) | Elevator traction sheave casting method | |
| CN102166632B (en) | Casting method of large-scale steel ingot | |
| CN103962517B (en) | A kind of apparatus for pouring of die casting electrode bar and pouring procedure thereof | |
| CN101683684B (en) | Tundish cold casting method | |
| CN108637199A (en) | The method for pouring the first stove ladle molten steel temperature is unwrapped among a kind of reduction | |
| CN102417949A (en) | Production process for material specially used for braking part of automobile | |
| CN102069174A (en) | Method for producing centrifugal electroslag smelting and casting double-base composite roller | |
| CN105251954B (en) | A kind of ingot steel casting mould and pouring procedure | |
| CN102433490A (en) | Spheroidization process for large-scale nodular iron castings | |
| CN104451355B (en) | High-phosphorous iron inoculation treating method and device in a kind of vaccum sensitive stove | |
| CN106111970A (en) | A kind of device and method being reduced ladle top slag oxidisability by excessive slag method | |
| CN105838974A (en) | Heavy section ductile iron for mine bridges and production method thereof | |
| JP6180030B2 (en) | Method for producing ferronickel | |
| CN102816967A (en) | Casting method of brake drum | |
| CN106392046A (en) | Iron alloy multifunctional chute device with fixed ladles | |
| CN107326258B (en) | A kind of following minor diameter Ductile iron bar of diameter 25mm and preparation method thereof | |
| CN104741588B (en) | The manufacture method of ICDP roll working lining | |
| CN103008626B (en) | For the method for the high temperate zone liquid core shake out of large extra thick plate blank | |
| US3662058A (en) | Utilization of molten slag from metallurgical furnace in manufacture of fused cast refractory shapes | |
| CN101987348B (en) | Method for casting road roller bracket casting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: NINGXIA GONGXIANG GROUP CO., LTD. Free format text: FORMER OWNER: NINGXIA CHANGCHENG XUQI MACHINE TOOL CASTING CO., LTD. Effective date: 20130219 Owner name: NINGXIA KOCEL MACHINERY CO., LTD. Free format text: FORMER OWNER: NINGXIA GONGXIANG GROUP CO., LTD. Effective date: 20130219 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20130219 Address after: 750021, No. 199 Tongxin South Street, Yinchuan Economic Development Zone, the Ningxia Hui Autonomous Region Applicant after: Ningxia Gongxiang Group Co., Ltd. Applicant after: KOCEL Machinery Co., Ltd. Address before: 750021 the Ningxia Hui Autonomous Region Yinchuan Xixia concentric Road No. 199 Applicant before: Ningxia Changcheng Xuqi Machine Tool Casting Co., Ltd. Applicant before: Ningxia Gongxiang Group Co., Ltd. |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120502 |