CN105112763A - Direct iron, carbon and manganese alloying method taking ore as raw material - Google Patents
Direct iron, carbon and manganese alloying method taking ore as raw material Download PDFInfo
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- CN105112763A CN105112763A CN201510584070.0A CN201510584070A CN105112763A CN 105112763 A CN105112763 A CN 105112763A CN 201510584070 A CN201510584070 A CN 201510584070A CN 105112763 A CN105112763 A CN 105112763A
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Abstract
A direct iron, carbon and manganese alloying method taking ore as a raw material belongs to the casting field and comprises the steps of uniformly mixing iron-manganese ore, solid carbon, iron ore, a binder and calcium carbonate, preparing the mixture into balls/blocks, drying the balls/blocks, and adding the dried balls/blocks into a special induction furnace. The balls/blocks comprise the following ingredients: 25-65 percent of iron-manganese ore, 25-60 percent of iron ore, 5-45 percent of solid carbon, 0.5-15 percent of the binder and 0.5-35 percent of calcium carbonate. After melting of furnace charge, alloy and furnace slag are discharged in a liquid manner. The power supply of the induction furnace is a mid-frequency or high-frequency induction power supply, and a crucible is made of a heat-proof metal or graphite. A water cooling coil is placed outside the crucible, and the total height of the water cooling coil is smaller than the height of the crucible. A dust collector is arranged above the crucible, an automatic feeder is mounted between the crucible and the dust collector and used for adding the balls/blocks, and the balls/blocks can be either independently added or added together with the metal furnace charge into the crucible. According to the direct iron, carbon and manganese alloying method, ore can be directly used, the special induction furnace is adopted, and an iron, carbon and manganese alloy is produced by one-time heating and directly used for casting while the use of ferromanganese or manganese metal and repeated heating are not needed, so that the production process is short, the raw materials are wide in source and the production cost is low.
Description
Technical field
The invention belongs to casting field, a kind of take ore as the iron carbon manganese DIRECT ALLOYING method of raw material.
Technical background
Along with industrialization degree improves day by day, iron carbon manganese alloy (high mangaenese steel and middle and high maganese cast iron) has been widely used in multiple cast article.The typical iron carbon manganese alloy mode of production is: first produce ferromanganese (Mn content >60%) with ANOMALY IN FINE QUALITY MANGANESE DEPOSITS stone for main raw material electric furnace (or blast furnace) or produce manganese metal with electrolytic process, then ferromanganese or manganese metal and steel scrap mixing remelting being produced the iron carbon manganese alloy containing Mn7 ~ 35%.The feature of this mode of production is: with ANOMALY IN FINE QUALITY MANGANESE DEPOSITS stone, steel scrap for main raw material; Electric furnace (or blast furnace) and intermediate frequency furnace is successively used to carry out 2 heating; Production Flow Chart is relatively long, burden cost is relatively high.Meanwhile, a large amount of cheap Ferromanganese Ore existed can not be utilized because iron-holder is high both at home and abroad.The present invention can with the iron carbon manganese alloy that cheap Ferromanganese Ore and iron ore are heated direct production for main raw material contained Mn7 ~ 35% by 1 time on the basis of once heating, and Production Flow Chart is short, raw materials cost is low.
Chinese invention patent CN1818085A discloses the processing method of a kind of waste ferro-silicon alloy, ferromanganese bits melting cast iron.This invention with the iron filings of waste ferro-silicon alloy and useless ferromanganese for main raw material, first that waste ferro-silicon alloy bits and the ferromanganese bits that give up are composite by a certain percentage and make block material with water glass, carbide slag etc.Send in smelting furnace by a certain percentage after drying and melt out cast iron according to a conventional method.Chinese invention patent CN1554792A discloses a kind of blast furnace-refining oven process and smelts medium-low carbon ferromanganese novel process.This invention with blast furnace ferromanganese hydrothermal solution for raw material, blast furnace ferromanganese liquid heat is sent to after hot metal mixer is warming up to 1450 ~ 1550 DEG C, be blended in refining furnace, oxygen decarburization, oxygen argon mixing blowing in mid-term, later stage close the reduction of oxygen Argon in earlier stage, and terminal temperature controls at 1750 ~ 1800 DEG C.Chinese invention patent CN1584095A discloses a kind of method utilizing intermediate frequency furnace remelting production ferromanganese alloy.This invention take manganese metal as raw material, and in first being dropped into by manganese metal, quite stove is also energized and is fused into liquid, and then in liquid metal manganese, add steel scrap, quality is 5 ~ 30% of manganese metal quality, removes slag after fusing; After the gold-containing solution cooling in ladle, be broken into the block ferromanganese of customer requirement.
Chinese invention patent CN1584089A discloses and is a kind ofly applied to metallurgical steel-making and machine casting uses manganese containing the production technique of gold.By the manganese ore of Mn content >20% with addition of reductive agent, heat-generating agent, catalyzer respectively crushing grinding mix in proportion after becoming particle powder and add binding agent again and make compound manganese alloy pelletizing.Compound manganese ore pellet is become liquid containing directly proceeding to electric arc furnace or induction furnace after manganese slag charge with addition of in electroslag furnace through shaft furnace or cupola melting, under arc furnace electrode or ruhmkorff coil and electrode in electroslag furnace heating, preparing different slag systems and be formed with the atmosphere be beneficial to containing the reduction of manganese melt cinder, becoming ferromanganese by being reduced into metal containing the manganese in manganese melt cinder.
Chinese invention patent CN101319289A discloses a kind of smelting process of High Manganese Steel Casting, and this invention uses steel scrap, ferromanganese, ferrochrome to be raw material, smelts high mangaenese steel with medium-frequency induction furnace.First add steel scrap, add ferromanganese and ferrochrome after fusing, temperature is raised to 1590 ~ 1610 DEG C of blowing outs, between tapping temperature 1470 ~ 1490 DEG C.
Summary of the invention
The invention provides a kind of take ore as the iron carbon manganese DIRECT ALLOYING method of raw material, and ore can be utilized to produce iron carbon manganese alloy (high mangaenese steel or high maganese cast iron).Pelletizing again after the mixing of iron ore, Ferromanganese Ore, solid carbon and additive, in induction furnace, reduction and DIRECT ALLOYING form iron carbon manganese alloy for Foundry Production, and Production Flow Chart is short, production cost is low.
A kind of iron carbon manganese alloy production method based on DIRECT ALLOYING, it is characterized in that: adopt induction furnace directly to use the charcoal ball/block that contains prepared for main raw material with Ferromanganese Ore, iron ore, binding agent, solid carbon to produce iron carbon manganese alloy, do not need to use ferromanganese or high manganese slag, do not need Repeat-heating.
Be 25 ~ 65% containing charcoal ball/block Ferromanganese Ore massfraction, the iron ore of full Iron grade >35% or iron content solid waste massfraction 24 ~ 60%, solid carbon massfraction 5 ~ 35%, binder content 0.5 ~ 15%, additive massfraction 0.5 ~ 25%; Wherein, the Ferromanganese Ore iron content 8 ~ 35% related to; Iron ore comprises iron content solid waste, iron content 35 ~ 70%; Solid carbon comprises coal, refinery coke, blue charcoal, coke and composition thereof, fixed carbon >35%.
Ball/block can join among induction furnace separately or with metal charge jointly.
Discharge with molten metal and liquid slag form after ball/block and metal charge reduce and melt, tapping temperature is 1250 ~ 1650 DEG C.
Induction furnace is made up of power supply, water cooled coil, furnace shell, crucible, cooling tower, particle collector and automatic feeder; Its power supply is intermediate frequency or high frequency induction power supply, is connected with water cooled coil by cable; Crucible is placed in water cooled coil inside, but water cooled coil total height is less than crucible 30 ~ 85%, therefore crucible upper limb is higher than water cooled coil; The heat preserving and insulating material such as magnesium oxide, mullite fiber is added with between lower portion of furnace body crucible and water cooled coil and between upper portion crucible and furnace shell; Furnace shell is coated on water cooled coil outside; Particle collector is suspended from crucible top, automatic feeder between therebetween, for reinforced in crucible; Its material of furnace shell, particle collector, feeding machine is not magnetic stainless steel.
Induction furnace uses metal or the plumbago crucible with induction heating ability; Induction furnace is 0.15 ~ 1.5kWkg to the heating power of ball/block
-1; Crucible total height is greater than water cooled coil 15 ~ 85%; Water cooled coil is divided into 2 ~ 6 groups from the bottom to top, and induction power supply connects respectively, independent control.
The present invention directly uses ore, adopts special induction furnace, and produce iron carbon manganese alloy by 1 heating and be directly used in casting, without the need to using ferromanganese or manganese metal, without the need to Repeat-heating, Production Flow Chart is short, raw material sources are extensive, production cost is low.The difference of technology is utilized to be mainly reflected in existing Ferromanganese Ore:
(1) raw material.Prior art needs first to produce ferromanganese or manganese metal, then in ferromanganese or manganese metal, allocates steel scrap remelting into produce iron carbon manganese alloy, is raw material the mode of production is different from of the present invention with Ferromanganese Ore and iron ore;
(2) heating times.Prior art produces iron carbon manganese alloy to be needed to carry out carrying out heating for 1 time in 1 heating, process in ferromanganese or manganese metal and steel scrap remelting producing in ferromanganese or manganese metal process again, at least just can prepare manganese carbon-iron alloy through 2 heating, need the mode of production that heats for 1 time different from of the present invention;
(3) melting equipment.Prior art also needs to use the induction furnaces such as intermediate frequency furnace in ferromanganese or manganese metal and steel scrap reflow process, but the metal charge heating that this conventional induction furnace can only be strong to electroconductibility, the ore that electric conduction of heating is poor can not be directly used in.The induction furnace that the present invention relates to is through the special melting equipment of redesign, all has bigger difference with existing conventional equipment on structure, material and outer shape parameter.
To sum up, the present invention is compared with existing iron carbon manganese alloy production technology, all different in raw material, heating times and processing method, the brand-new iron carbon manganese alloy production technique of to be a kind of with ore be main raw material.
Technical scheme of the present invention is as follows:
(1) first solid carbon, Ferromanganese Ore are crushed to-5mm and mix with iron ore, binding agent, additive.Wherein, Ferromanganese Ore 25 ~ 65%, iron ore 25 ~ 60%, solid carbon 5 ~ 45%, binding agent 0.5 ~ 15%, calcium carbonate 0.5 ~ 35%; Binding agent comprises wilkinite, water glass, slaked lime, cement, Xylo-Mucine etc.
(2) by the mixing of-5mm Ferromanganese Ore, solid carbon and iron ore, binding agent and calcium carbonate and agglomeration, the shape of material block is ball or other block aggregates;
(3) by dried ball/block separately or jointly add in special induction furnace melting, reduction and DIRECT ALLOYING with metal charge;
(4), after load melting, alloy discharges induction furnace with molten metal form, and slag is mechanically discharged.
Accompanying drawing explanation
Fig. 1 (a) prepares the production process of iron carbon manganese alloy containing charcoal ball/block for being used alone; Fig. 1 (b) shares for containing charcoal ball/block and steel scrap or the pig iron production process preparing iron carbon manganese alloy.
Fig. 2 is the special induction furnace structure iron of the present invention,
1 be power supply, 2 be water cooled coil, 3 be furnace shell, 4 be crucible, 5 be cooling tower, 6 be particle collector, 7 for automatic feeder.
Embodiment
Following instance for illustration of implementation process of the present invention, but is not used for limiting using method of the present invention and the scope of application.
Example 1:
Prepare induction furnace with containing charcoal ball/block, its raw material is Guangxi Ferromanganese Ore, Hebei iron ore and Shanxi bituminous coal, and Ferromanganese Ore main component is: MnO
227.17%, TFe15.21%, SiO
229.86%, Al
2o
38.16%, CaO3.22%, MgO2.77%, size composition-0.074mm accounts for 63%; Bituminous coal ash content 16.67%, moisture 3.62%, volatile matter 13.16%, fixed carbon 66.55%; Iron ore TFe61.91%, SiO
23.11%, Al
2o
33.26%, size composition-0.074mm accounts for 63.92%.
Preparation and use procedure:
(1) broken and mixing.Hard coal is crushed to-2mm; Get Ferromanganese Ore 100kg, add iron ore 100kg, hard coal 45kg, wilkinite 10kg, calcium carbonate 6kg, water 15L mixes and stirs;
(2) shaping.Use friction press agglomeration, the material after mixing is made diameter 50mm blocks, become ball pressure to be about 40kN;
(3) ball/block is dried.Ball is placed in 65 DEG C of compartment dryers to dry;
(4) use.350kg ball/block is added separately melting to special induction furnace, adopts slag removal machine to take off slag discharging; Tapping temperature 1410 DEG C, is directly used for casting medium manganese nodular cast iron by molten metal.
Example 2:
Prepare induction furnace with containing charcoal ball/block, its raw material is Yunnan Ferromanganese Ore, Hebei iron ore and Shanxi bituminous coal, and Ferromanganese Ore main component is: MnO
219.36%, TFe25.37%, SiO
224.13%, Al
2o
37.45%, CaO3.17%, MgO2.22%, size composition-0.074mm accounts for 55.27%; Bituminous coal ash content 16.67%, moisture 3.62%, volatile matter 13.16%, fixed carbon 66.55%; Iron ore TFe61.91%, SiO
23.11%, Al
2o
33.26%, size composition-0.074mm accounts for 63.92%.
Preparation and use procedure:
(1) broken and mixing.Hard coal is crushed to-2mm; Get Ferromanganese Ore 100kg, add iron ore 60kg, hard coal 25kg, wilkinite 12kg, water 12L mixes and stirs;
(2) shaping.Use pair roller ball press pelletizing, the material after mixing is made diameter 22mm pelletizing, become ball pressure to be about 10kN;
(3) ball/block is dried.Ball is placed in 280 DEG C of dry kiln dries;
(4) use.Get 235kg ball/block and 65kg foundry iron adds melting to induction furnace simultaneously, slag removal machine takes off slag discharging; Tapping temperature 1550 DEG C, is directly used in casting high mangaenese steel.
Claims (6)
1. the iron carbon manganese alloy production method based on DIRECT ALLOYING, it is characterized in that: adopt induction furnace directly to use the charcoal ball/block that contains prepared for main raw material with Ferromanganese Ore, iron ore, binding agent, solid carbon to produce iron carbon manganese alloy, do not need to use ferromanganese or high manganese slag, do not need Repeat-heating.
2. the iron carbon manganese alloy production method based on DIRECT ALLOYING according to claim 1, it is characterized in that containing charcoal ball/block Ferromanganese Ore massfraction be 25 ~ 65%, the iron ore of full Iron grade >35% or iron content solid waste massfraction 24 ~ 60%, solid carbon massfraction 5 ~ 35%, binder content 0.5 ~ 15%, additive massfraction 0.5 ~ 25%; Wherein, the Ferromanganese Ore iron content 8 ~ 35% related to; Iron ore comprises iron content solid waste, iron content 35 ~ 70%; Solid carbon comprises coal, refinery coke, blue charcoal, coke and composition thereof, fixed carbon >35%.
3. the iron carbon manganese alloy production method based on DIRECT ALLOYING according to claim 1, is characterized in that ball/block can join among induction furnace separately or with metal charge jointly.
4. the iron carbon manganese alloy production method based on DIRECT ALLOYING according to claim 1, it is characterized in that ball/block and metal charge reduce melt after discharge with molten metal and liquid slag form, tapping temperature is 1250 ~ 1650 DEG C.
5. the iron carbon manganese alloy production method based on DIRECT ALLOYING according to claim 1 or 3, is characterized in that induction furnace is made up of power supply, water cooled coil, furnace shell, crucible, cooling tower, particle collector and automatic feeder; Its power supply is intermediate frequency or high frequency induction power supply, is connected with water cooled coil by cable; Crucible is placed in water cooled coil inside, but water cooled coil total height is less than crucible 30 ~ 85%, therefore crucible upper limb is higher than water cooled coil; The heat preserving and insulating material such as magnesium oxide, mullite fiber is added with between lower portion of furnace body crucible and water cooled coil and between upper portion crucible and furnace shell; Furnace shell is coated on water cooled coil outside; Particle collector is suspended from crucible top, automatic feeder between therebetween, for reinforced in crucible; Its material of furnace shell, particle collector, feeding machine is not magnetic stainless steel.
6. the iron carbon manganese alloy production method based on DIRECT ALLOYING according to claim 5, is characterized in that induction furnace uses metal or the plumbago crucible with induction heating ability; Induction furnace is 0.15 ~ 1.5kWkg to the heating power of ball/block
-1; Crucible total height is greater than water cooled coil 15 ~ 85%; Water cooled coil is divided into 2 ~ 6 groups from the bottom to top, and induction power supply connects respectively, independent control.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1415766A (en) * | 2002-10-10 | 2003-05-07 | 吴光亮 | Composite ball rolls of manganese and its preparation method |
| CN102373333A (en) * | 2011-09-29 | 2012-03-14 | 云南文山斗南锰业股份有限公司 | Method for preparing high carbon ferromanganese |
| CN104089476A (en) * | 2014-08-04 | 2014-10-08 | 王太进 | Method for using induction furnace for smelting iron alloy and dedicated induction furnace |
| CN104630459A (en) * | 2015-01-04 | 2015-05-20 | 北京科技大学 | Self-heating carbon-containing ball/block applied to induction furnace casting |
-
2015
- 2015-09-14 CN CN201510584070.0A patent/CN105112763B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1415766A (en) * | 2002-10-10 | 2003-05-07 | 吴光亮 | Composite ball rolls of manganese and its preparation method |
| CN102373333A (en) * | 2011-09-29 | 2012-03-14 | 云南文山斗南锰业股份有限公司 | Method for preparing high carbon ferromanganese |
| CN104089476A (en) * | 2014-08-04 | 2014-10-08 | 王太进 | Method for using induction furnace for smelting iron alloy and dedicated induction furnace |
| CN104630459A (en) * | 2015-01-04 | 2015-05-20 | 北京科技大学 | Self-heating carbon-containing ball/block applied to induction furnace casting |
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