CN1015001B - Technology for alloying of cast-iron - Google Patents
Technology for alloying of cast-ironInfo
- Publication number
- CN1015001B CN1015001B CN 88107848 CN88107848A CN1015001B CN 1015001 B CN1015001 B CN 1015001B CN 88107848 CN88107848 CN 88107848 CN 88107848 A CN88107848 A CN 88107848A CN 1015001 B CN1015001 B CN 1015001B
- Authority
- CN
- China
- Prior art keywords
- iron
- ore
- alloying
- wolfram
- tungsten
- 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.)
- Expired
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to an alloying technology of cast iron. In the technology, wolfram ore is sintered at a temperature of 850 to 1000 DEG C, and the formula of sintered materials comprises 100% of wolfram ore, 15 to 30% of charcoal powder (electrode carbon powder), 10 to 20% of slaked lime (CaO) and 10 to 15% of clay. Then the sintered blocks of the wolfram ore are directly added to an iron ladle, and molten iron is flushed for alloying. The present invention has the advantages of energy saving (a procedure for smelting iron alloy with tungsten ore is reduced), obvious economic benefit (the price of the wolfram ore is lower than that of ferrotungsten and is only 1/5 of that of molybdenum iron), convenient operation (the wolfram ore can be directly added to the iron ladle), high wolfram utilization rate and high mobility and flexibility.
Description
The invention belongs to Castiron Melting technology.
Particularly in spheroidal graphite cast iron and the alloy white cast iron, copper, molybdenum, tungsten are main alloy elements in cast iron.Tungsten and molybdenum generally are that the form with ferrotungsten and molybdenum-iron adds with metal charge and carries out melting in cupola furnace or the electric furnace.
Molybdenum is element in short supply, costs an arm and a leg, and at present state includes the molybdenum-iron of 55% molybdenum, and per kilogram needs 58 yuan, and tungsten is abundant at China's reserves, and its character is similar with molybdenum, everyly makes the alloy of alloying element with molybdenum, and all available tungsten replaces.Tungsten promptly is an example for molybdenum in the rapid steel.
China Jiangxi Province abounds with tungsten ore, and also there is tungsten ore in Linan, Zhejiang, and the past generally all is smelt iron alloy with tungsten ore, it is the ferrotungsten of tungstenic about 70%, the fusing point height of this ferrotungsten, good toughness, difficult broken are easily scurried material when adding cupola furnace with furnace charge, be difficult for guaranteeing required alloying constituent.
Iron and carbon are to this principle of saturation force of oxygen in the cast iron to the saturation force of oxygen according to tungsten, and Tungsten oxide 99.999 (tungsten ore) can be reduced by carbon in the molten iron and iron when adding in the molten iron, thereby reaches the purpose of alloying.
But tungsten ore and molybdenum ore generally all contain sulphur, as direct application (add cupola furnace or add in the molten iron) sulfur content of hot metal are increased, and worsen castings material, especially concerning spheroidal graphite cast iron is produced, and can not nodularization and cause foundry goods to be scrapped.Secondly, during by carbon in the molten iron and iron reduction-oxidation tungsten, cause the reduction of carbon content in the molten iron the most at last.
The purpose of this invention is to provide a kind of cast iron alloy novel process.
The present invention is at 850 to 1000 ℃ of (900 ℃ of the bests) sintering temperatures with tungsten ore, its sintered material prescription is 100 parts of tungsten ores, wood charcoal powder (or electrode powdered carbon) 15-30 part, white lime (CaO) 10-20 part, potter's clay 10-15 part is with 100 parts of tungsten ores, 20 parts of wood charcoal powders (or electrode powdered carbon), 15 parts of white limes (CaO), 12.5 parts of the bests of potter's clay.By sintering, most of sulphur is removed in the tungsten ore, and secondly powdered carbon can make the Tungsten oxide 99.999 local reduction.This reaction process is inadequate, (temperature is lower), and unnecessary powdered carbon can play recarburization in molten iron.Directly add in the hot metal ladle with above-mentioned tungsten ore agglomerate then, then pour molten iron and carry out alloying.Pour the molten ductile iron (molten iron temperature is 1350 ℃～1370 ℃) of spheroidizing, the reduction ratio of Tungsten oxide 99.999 reaches 90%(and comprises sintering process), can stably obtain magnesium iron, nodularization is good.The present invention also adds in the molten iron of intermediate frequency furnace melting with above-mentioned agglomerate, and the reduction ratio that can stably obtain the good magnesium iron Tungsten oxide 99.999 of nodularization equally is stabilized in about 90%.
The present invention compares with general use ferrotungsten method has following advantage:
(1) energy-conservation, reduced the operation of tungsten ore ironmaking alloy;
(2) remarkable in economical benefits, tungsten ore is cheap far beyond ferrotungsten, only is 1/5 of molybdenum-iron.
(3) easy to operate, can directly add in the hot metal ladle, the utilization ratio height and the maneuverability of tungsten are because when using ferrotungsten to add cupola furnace with furnace charge; Need certain batch, otherwise can not guarantee required composition, the present invention can directly add in the hot metal ladle, and molten iron quantity is not limit (can less to 50 kilograms), and can adjust alloying constituent arbitrarily.
Claims (3)
1, a kind of technology for alloying of cast-iron is characterized in that:
A. with tungsten ore at 850 to 1000 ℃ of sintering temperatures;
B. directly add in the hot metal ladle with above-mentioned tungsten ore agglomerate then;
C. then pour molten iron and carry out alloying.
2, a kind of technology for alloying of cast-iron according to claim 1 is characterized in that:
Wherein tungsten ore is 900 ℃ of following sintering the bests; The sintered material prescription is: 100 parts of tungsten ores, wood charcoal powder (or electrode powdered carbon) 15-30 part, white lime (CaO) 15-20 part, potter's clay 10-15 part.
3, a kind of technology for alloying of cast-iron according to claim 2 is characterized in that:
Wherein the sintered material prescription is 100 parts of tungsten ores, 20 parts of wood charcoal powders (or electrode powdered carbon), 15 parts of white limes (CaO), 12.5 parts of the bests of potter's clay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88107848 CN1015001B (en) | 1988-11-11 | 1988-11-11 | Technology for alloying of cast-iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88107848 CN1015001B (en) | 1988-11-11 | 1988-11-11 | Technology for alloying of cast-iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1042571A CN1042571A (en) | 1990-05-30 |
| CN1015001B true CN1015001B (en) | 1991-12-04 |
Family
ID=4834809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88107848 Expired CN1015001B (en) | 1988-11-11 | 1988-11-11 | Technology for alloying of cast-iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1015001B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100500908C (en) * | 2007-05-17 | 2009-06-17 | 钢铁研究总院 | Technique for alloying steel making directly from tungsten ore |
-
1988
- 1988-11-11 CN CN 88107848 patent/CN1015001B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1042571A (en) | 1990-05-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |