CN101760690A - Subcontracting magnesium-injection spheroidizing process - Google Patents
Subcontracting magnesium-injection spheroidizing process Download PDFInfo
- Publication number
- CN101760690A CN101760690A CN200910075895A CN200910075895A CN101760690A CN 101760690 A CN101760690 A CN 101760690A CN 200910075895 A CN200910075895 A CN 200910075895A CN 200910075895 A CN200910075895 A CN 200910075895A CN 101760690 A CN101760690 A CN 101760690A
- Authority
- CN
- China
- Prior art keywords
- magnesium
- subcontracting
- injection
- spheroidizing
- grain
- 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
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to a subcontracting magnesium-injection spheroidizing process which is characterized in that pure magnesium particles or pure passivated particles are used as spheroidizing agents; compressed nitrogen or air compressed wind is utilized to blow the pure magnesium particles or the pure passivated particles to the bottom of a foundry ladle; in contact with molten iron at the bottom of the foundry ladle, the magnesium particles evaporates and rises; in the rising process, large amount of magnesium steam is absorbed by the molten iron; and meanwhile, strong stirring is generated on the molten iron. The invention has simple process, high iron absorption rate, high spheroidizing speed and high efficiency.
Description
Technical field
The present invention relates to a kind of Subcontracting magnesium-injection spheroidizing process.
Background technology
At present, in the production process of spheroidal graphite cast iron, the spheroidizing of molten iron is a key link, and the selection of spheroidizing agent and the improvement of spheriodizing technique are the contents that countries in the world founder author constantly studies in the research and production practice.Current most widely used at home spheriodization process thereof is to pour the method spheriodization process thereof and feed silk method spheriodization process thereof.Subcontracting pure magnesium spheriodization process thereof uses comparatively general abroad.
Pour that nodularization method labor strength is big, nodularization flue dust, flash of light be more serious, pollute big, magnesium absorption rate low (30% ~ 40%), the quantity of slag of generation is big, the hot metal purifying degree is low.
Though feed pompon method nodularization flue dust, flash of light is lighter, equipment cost and running cost height, magnesium absorption rate is on the low side (35% ~ 50%), and the quantity of slag of generation is also on the high side, and the purity of molten iron is on the low side.
Though it is lighter to subcontract flue dust, the magnesium light of pure magnesium nodularization method generation, is easy to dedusting, magnesium absorption rate higher (40% ~ 70%), cost is not high, the cost of equipment height, trivial operations, labor strength is big, the cost of labor height.
Summary of the invention
In order to overcome the shortcoming of prior art, the invention provides a kind of Subcontracting magnesium-injection spheroidizing process, its technology is simple, the magnesium absorption rate height, nodularization speed is fast, the efficient height.
The present invention solves the technical scheme that its technical problem takes: Subcontracting magnesium-injection spheroidizing process selects for use pure magnesium grain or Inactivate granular magnesium as nodulizing agent; utilize compressed nitrogen or pneumatics wind that pure magnesium grain or Inactivate granular magnesium are jetted at the bottom of the hot metal ladle bag; the magnesium grain rose at the bag end and molten iron Contact Evaporating; magnesium vapor is in uphill process; a large amount of is absorbed by iron liquid, simultaneously iron liquid is produced intensive and stirs.
The add-on of described pure magnesium grain or Inactivate granular magnesium is molten iron 1.5～3.0kg per ton.
The temperature of described molten iron is 1350 ℃～1550 ℃.
The jetting pressure of described pure magnesium grain or Inactivate granular magnesium is 0.2-0.5MPa.
The granularity of described pure magnesium grain and Inactivate granular magnesium is 20～100 orders.
The present invention has following advantage: 1, this technology is used pure magnesium nodularization, and the delivery technology of simultaneously powder being jetted is used into, is combined into Subcontracting magnesium-injection spheroidizing process.By in application in practice, no matter be that each side such as efficient or effect all are better than subcontracting pure magnesium spheriodizing technique; 2, make nodulizing agent with Inactivate granular magnesium, significantly reduced the add-on of nodulizing agent, reduced the spheroidizing cost; 3, desulfurization of iron liquid and nodularization can be carried out simultaneously, and the sulphur content of original iron melt allows to reach 0.03%, and need not pre-desulfurization; Handle back remaining sulfur content low (below 0.008%); 4, the specific absorption height of magnesium can reach 50% ~ 70%; 5, carburetting or add other alloying elements reliably in treating processes; 6, making nodulizing agent with Inactivate granular magnesium can not increase silicon content in the iron liquid, thereby can control the silicon content in the iron liquid more accurately, flexibly, makes molten iron ingredient stability and avoiding waste; 7, the loss for the treatment of processes iron liquid temp is little; 8, production efficiency height about nodularization one iron clad water polo time 2min, per hour can be handled 6-10 iron clad liquid; 9, labour intensity is starkly lower than other spheronization process; 10, level of automation is higher, and labor strength is low, and is easy to use, reliable; Nodularization rhythm is very fast, and the production efficiency height can satisfy and produce needs in enormous quantities; Overcome and subcontracted violent, the unsettled shortcoming of spheroidizing reacion, spheroidizing reacion is steady, and nodularization is effective, and molten iron composition, temperature are uniform and stable; 11, because less as the magnesium grain add-on of nodulizing agent, cost is obviously reduced; 12, simultaneously because the hot metal ladle of this kind shape has reasonable insulation effect, in the spheroidizing process loss of iron liquid temp little, therefore can suitably reduce temperature before the molten iron nodularization.
Embodiment
Subcontracting magnesium-injection spheroidizing process selects for use pure magnesium grain or Inactivate granular magnesium as nodulizing agent; utilize compressed nitrogen or pneumatics wind that pure magnesium grain or Inactivate granular magnesium are jetted at the bottom of the hot metal ladle bag; the magnesium grain rose at the bag end and molten iron Contact Evaporating; magnesium vapor is in uphill process; a large amount of is absorbed by iron liquid; simultaneously iron liquid being produced intensive stirs; the magnesium vapor floating-upward process has increased reaction interface; make the spheroidizing reacion process faster; more abundant, more even, compressed nitrogen or pneumatics wind help inclusion and the gas come-up in the iron liquid; and the stirring of iron liquid; it is even to make iron liquefaction learn composition, high purity, and the magnesium vapor come-up need overcome the pressure that molten iron produces simultaneously; increase the duration of contact of magnesium vapor and iron liquid, improved magnesium absorption rate.The add-on of described pure magnesium grain or Inactivate granular magnesium is molten iron 1.5～3.0kg per ton.The temperature of described molten iron is 1350 ℃～1550 ℃.In order to reduce seething and spattering iron of iron liquid; increase the residence time of magnesium vapor in iron is tucked in simultaneously; the jetting pressure of Subcontracting magnesium-injection spheroidizing process can not be too high; as long as jetting pressure overcomes the pressure of tube friction and molten iron generation, the jetting pressure of magnesium grain or Inactivate granular magnesium is 0.2-0.5MPa.Because magnesium grain globule size directly influences specific absorption, granularity is big, stifled easily jet pipe; Granularity is little, and the magnesium grain is sprayed onto scaling loss height in the molten iron, and specific absorption is low, and the granularity of pure magnesium grain and Inactivate granular magnesium is 20～100 orders.
Claims (5)
1. Subcontracting magnesium-injection spheroidizing process; it is characterized in that: select for use pure magnesium grain or Inactivate granular magnesium as nodulizing agent; utilize compressed nitrogen or pneumatics wind that pure magnesium grain or Inactivate granular magnesium are jetted at the bottom of the hot metal ladle bag; the magnesium grain rose at the bag end and molten iron Contact Evaporating; magnesium vapor is in uphill process; a large amount of is absorbed by iron liquid, simultaneously iron liquid is produced intensive and stirs.
2. Subcontracting magnesium-injection spheroidizing process according to claim 1 is characterized in that: the add-on of described pure magnesium grain or Inactivate granular magnesium is molten iron 1.5～3.0kg per ton.
3. Subcontracting magnesium-injection spheroidizing process according to claim 1 is characterized in that: the temperature of described molten iron is 1350 ℃～1550 ℃.
4. Subcontracting magnesium-injection spheroidizing process according to claim 1 is characterized in that: the jetting pressure of described pure magnesium grain or Inactivate granular magnesium is 0.2-0.5MPa.
5. Subcontracting magnesium-injection spheroidizing process according to claim 1 is characterized in that: the granularity of described pure magnesium grain and Inactivate granular magnesium is 20～100 orders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910075895A CN101760690A (en) | 2009-11-06 | 2009-11-06 | Subcontracting magnesium-injection spheroidizing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910075895A CN101760690A (en) | 2009-11-06 | 2009-11-06 | Subcontracting magnesium-injection spheroidizing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101760690A true CN101760690A (en) | 2010-06-30 |
Family
ID=42492067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910075895A Pending CN101760690A (en) | 2009-11-06 | 2009-11-06 | Subcontracting magnesium-injection spheroidizing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101760690A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108842109A (en) * | 2018-09-25 | 2018-11-20 | 山东国铭球墨铸管科技有限公司 | A kind of nodulizing process of passivated magnesium blowing process spheroidal graphite cast-iron |
| CN109356987A (en) * | 2018-12-21 | 2019-02-19 | 盐城市精工铸业股份有限公司 | High-nickel austenite nodular cast iron valve-stem nut and its manufacturing method |
| CN115198050A (en) * | 2022-06-22 | 2022-10-18 | 攀钢集团西昌钢钒有限公司 | Environment-friendly emission device for smoke covering agent of molten steel tank and hot-metal tank |
-
2009
- 2009-11-06 CN CN200910075895A patent/CN101760690A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108842109A (en) * | 2018-09-25 | 2018-11-20 | 山东国铭球墨铸管科技有限公司 | A kind of nodulizing process of passivated magnesium blowing process spheroidal graphite cast-iron |
| CN109356987A (en) * | 2018-12-21 | 2019-02-19 | 盐城市精工铸业股份有限公司 | High-nickel austenite nodular cast iron valve-stem nut and its manufacturing method |
| CN115198050A (en) * | 2022-06-22 | 2022-10-18 | 攀钢集团西昌钢钒有限公司 | Environment-friendly emission device for smoke covering agent of molten steel tank and hot-metal tank |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5467142B2 (en) | Method for producing crude copper directly from copper concentrate | |
| JP5606320B2 (en) | Manufacturing method of molten iron | |
| CN102888492B (en) | Si-Ca-Al-Mg-RE (rare earth) composite deoxidizer and preparation method thereof | |
| CN102851624B (en) | Ultrahigh-strength hot-rolled resin anchor rod reinforcement steel bar and production method thereof | |
| CN108048618A (en) | A kind of converter CO2The method of vanadium extraction | |
| KR20010053024A (en) | Method for processing steel slags | |
| CN101302577B (en) | MgO-based desulfurizer based on self-propagating and preparation thereof | |
| CN101298631A (en) | In situ mechanically rabbled furnace external desulfurization method and apparatus | |
| CN107653358A (en) | The method of the quick deoxidation of LF refining furnace smelting process | |
| CN102827997A (en) | Calcium carbide ferro-aluminium alloy used for smelting steel, and preparation method thereof | |
| CN101760690A (en) | Subcontracting magnesium-injection spheroidizing process | |
| CN108179245A (en) | A kind of composite air supply vanadium extraction by converter blowing method | |
| CN102041400B (en) | Process and equipment for producing high-content manganese silicon alloy from low-grade ferromanganese ore | |
| RU2741038C1 (en) | Method and device for melting copper with complex processing of slag | |
| CN1141407C (en) | Special degasifier for cleaning aluminium alloy and its application method | |
| CN101787414B (en) | Complex deoxidizer for steelmaking and preparation method thereof | |
| CN114293014B (en) | Silicon carbide-free thermal reduction magnesium metallurgy device and method | |
| Shakurov et al. | Processing of liquid steelmaking slags to obtain commercial products | |
| CN202063976U (en) | Equipment for producing high manganese-silicon by low-grade ferromanganese ore | |
| CN103031409A (en) | Novel process of steelmaking deoxidization by utilizing precipitator dust of refining furnace | |
| CN102876832A (en) | Process for performing converter alloying vanadium increase by sheeted V2O5 | |
| US3897231A (en) | Method for contacting hot, viscous, molten slag with gaseous reactants | |
| CN102296201A (en) | Degassing method for refining cast aluminum alloy | |
| CN201092578Y (en) | Device for synchronous implementation of molten iron desulfurization and spheroidization | |
| CN100412215C (en) | Copper-nickel-silicon-ferroalloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20100630 |