CN1408892A - Process for producing rare earth magnesium-silicon-iron alloy in twin ore heating furnace and induction furnace and through pressurized magnesium addition - Google Patents
Process for producing rare earth magnesium-silicon-iron alloy in twin ore heating furnace and induction furnace and through pressurized magnesium addition Download PDFInfo
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- CN1408892A CN1408892A CN 01135601 CN01135601A CN1408892A CN 1408892 A CN1408892 A CN 1408892A CN 01135601 CN01135601 CN 01135601 CN 01135601 A CN01135601 A CN 01135601A CN 1408892 A CN1408892 A CN 1408892A
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Abstract
The present invention relates to the production process of RE-Mg-Si-Fe alloy in twin ore heating furnace and induction furnace. The production process includes smelting in ore heating furnace to obtain multielement alloy liquid with Si in 40-78 wt%, RE is 0-33 wt%, Ca in 0-20 wt% and Ba in 0-20 wt%; pressurized adding Mg and nitrogen stirring in industrion furnace and filming pressure casting to produce thin ingot under the protective nitrogen. The present invention has short technological chain, high environemnt protection, low power consumption, high product quality and low cost.
Description
The invention belongs to metallurgical melting pressure of magnesium adding rare earth magnesium ferrosilicon alloy production technique.
At present, adopt hot stove melting 50% ferrosilicon in ore deposit abroad, convert alloy part, adjust composition, the explained hereafter rare earth magnesium ferrosilicon alloy of pressure of magnesium adding then as rare earth ferrosilicon, silico-calcium etc. with dashing in the ferrosilicon liquid discrepancy tundish.But because of the heat restriction of ferrosilicon liquid, dash the limited amount of fusion gold, can only produce the low rare earth alloy of low magnesium.The melting technology of domestic employing has two kinds, a kind of is the molten magnesium method of joining, this technology is as melting equipment with medium-frequency induction furnace, with metalliferous material: melt in the stoves of packing into successively such as MAGNESIUM METAL, rare earth ferrosilicon, ferrosilicon, silico-calcium, steel scrap, stir after melting clearly, the ingot casting of coming out of the stove, broken on request after the cooling, check, packing.This process characteristic is: alloy ingredient control is more accurate, but the scaling loss of MAGNESIUM METAL, oxidation are higher, control the improper easy result of use that influences.Another kind of technology is to press the magnesium method, and the characteristics of this technology are that MAGNESIUM METAL does not melt in stove, but after the molten China of other metalliferous material, comes in and goes out in the tundish, with special clad magnesium ingot is pressed in the alloy liquid.The characteristics of this technology are: the scaling loss of MAGNESIUM METAL is big, and the oxidation of the interior magnesium of alloy is low, and alloy liquid is purer, but the composition deviation is big, lack of homogeneity.
The objective of the invention is to overcome the deficiencies in the prior art part, can make alloy ingredient control more accurate and provide a kind of, the MAGNESIUM METAL scaling loss is few, content of magnesia is lower, alloy is purer, homogeneity is better, the new process of production of a kind of rare earth magnesium ferrosilicon alloy of " high environmental protection, less energy-consumption, high quality, low cost " that the grade distribution is outstanding.
Embodiment of the present invention are: utilize multicomponent alloy liquids such as ore deposit hot stove carbothermy smelt iron, silicon, RE, calcium, barium, its composition scope is: Si:40-78%, Ca:0-20%, RE:0-33%, Ba:0-20%, hot charging is gone in the induction furnace (other smelting furnace or tundish) then, through stokehold multiple tracks X-fluorescence real-time analysis, after metal charges such as a small amount of necessary rare earth ferrosilicon of adding, silico-calcium, steel scrap are adjusted composition and temperature, in stove or in the bag, carry out pressure of magnesium adding, nitrogen stirs again, carries out the molten nitrogen of alloy liquid and purify slagging-off handling.After skimming, the thin ingot of die casting under nitrogen protection, coiling, and when its molten state,,, when alloy density is increased, quicken its cooling according to the requirement of alloy granularity with being covered with protectant platen briquetting, carry out fragmentation, check, packing at last.
Effect of the present invention is:
1, only need improve the environmental issue of the hot stove in ore deposit, can make the whole process of rare earth magnesium ferrosilicon alloy produce realization " high environmental protection, less energy-consumption ", product reaches the automatization link of the higher degree of " high quality, low cost " and production technique.
2, because the shortening of production technique chain is compared with current technology, and energy consumption reduces more than 70%, to pollute and reduce more than 80%, product cost reduces 15-25%.
3, alloy ingredient is accurate, and composition uniformity is good, high purity, and the density height, grade distributes, and can improve the quality index of magnesium iron behind the molten nitrogen of alloy, has increased the scientific and technological content of this product.
Fig. 1 is technological process of production figure of the present invention.
Below in conjunction with accompanying drawing enforcement of the present invention is described further:
Produce the rare earth magnesium ferrosilicon alloy of the FeSiMg8RE5Ca2 trade mark, its composition scope is: magnesium: 7.5-8.5%, and RE:4.8-5.2%, calcium: 1.8-2.2%, silicon: 39-41%, the target composition is: Mg:7.8, RE:5.0, Ca:2.0, Si:40.
With the quad alloy liquid of 6300KVA mine heat furnace smelting 60%Si, 7%RE, 3%Ca, once the amount of coming out of the stove is 2 tons.Alloy liquid hot charging is gone in 6 tons of induction furnaces, carry out the quick test of RE, Si, Ca simultaneously, the result is: Si:61.2, RE:6.8, Ca:3.1.Add according to the result and after a small amount of steel scrap 450Kg, 30%RE rare earth ferrosilicon 180Kg adjust composition temperature to be adjusted to 1280-1300 ℃, in stove or in the bag, do not have boiling pressure and add magnesium, add all the other steel scraps or hot hot metal charging again, carry out the molten nitrogen of alloy liquid then and purify slagging-off handling.After skimming; under nitrogen protection, the quantitative 100Kg/ dish of alloy liquid is poured into wharve successively; and when its molten state; with being covered with protectant platen briquetting; according to the requirement of the whole granularity of alloy, make the thin ingot of 15-40mm, when alloy density is increased; quicken its cooling, and the grade of improving its finished breaking distributes and minimizing is consumed and expended.Fragmentation on request, check, packing after the cooling.
Advantage of the present invention is: high-environmental, low energy consumption, high-quality, low cost, alloy composition is accurate, and is pure Degree is high. Size distribution is good, and the automation of link of higher degree is arranged.
Claims (2)
1, the production technique of the hot stove in a kind of ore deposit, induction furnace duplex pressure of magnesium adding production rare earth magnesium ferrosilicon alloy, it is characterized in that: adopt the hot stove melting in ore deposit to contain: silicon: 40-78%, RE:0-33%, calcium: 0-20%, the multicomponent alloy liquid of barium: 0-20%, hot charging is gone in the induction furnace.Carry out the quick test of RE, Si, Ca simultaneously.Add after a spot of rare earth ferrosilicon, silico-calcium, steel scrap etc. adjust composition and temperature according to the result, carry out pressure of magnesium adding in stove, in the bag, nitrogen stirs again, carries out the molten nitrogen of alloy liquid and purify slagging-off handling.After skimming, under nitrogen protection, the thin ingot of die casting in coiling, and when its molten state, with being covered with protectant platen briquetting, according to the requirement of the whole granularity of alloy, fragmentation on request, check, packing after the cooling.
2, the production technique of the hot stove in a kind of ore deposit according to claim 1, induction furnace duplex pressure of magnesium adding production rare earth magnesium ferrosilicon alloy, it is characterized in that: adopt the hot stove melting in ore deposit to contain: silicon: 40-78%, RE:0-33%, calcium: 0-20%, the multicomponent alloy liquid of barium: 0-20%, hot charging are gone in induction furnace, the tundish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01135601 CN1210426C (en) | 2001-09-30 | 2001-09-30 | Process for producing rare earth magnesium-silicon-iron alloy in twin ore heating furnace and induction furnace and through pressurized magnesium addition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01135601 CN1210426C (en) | 2001-09-30 | 2001-09-30 | Process for producing rare earth magnesium-silicon-iron alloy in twin ore heating furnace and induction furnace and through pressurized magnesium addition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1408892A true CN1408892A (en) | 2003-04-09 |
| CN1210426C CN1210426C (en) | 2005-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 01135601 Expired - Fee Related CN1210426C (en) | 2001-09-30 | 2001-09-30 | Process for producing rare earth magnesium-silicon-iron alloy in twin ore heating furnace and induction furnace and through pressurized magnesium addition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136831A (en) * | 2015-08-28 | 2015-12-09 | 钢研纳克检测技术有限公司 | Rare-earth smelting and separation process mass partition quantity online monitor |
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2001
- 2001-09-30 CN CN 01135601 patent/CN1210426C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136831A (en) * | 2015-08-28 | 2015-12-09 | 钢研纳克检测技术有限公司 | Rare-earth smelting and separation process mass partition quantity online monitor |
| CN105136831B (en) * | 2015-08-28 | 2016-06-22 | 钢研纳克检测技术有限公司 | A kind of rare-earth smelting separation process quality partition amount on-line computing model |
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| CN1210426C (en) | 2005-07-13 |
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