CN103233158A - Quick cooling decarburization method of high-carbon chromium iron - Google Patents
Quick cooling decarburization method of high-carbon chromium iron Download PDFInfo
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- CN103233158A CN103233158A CN2013101490361A CN201310149036A CN103233158A CN 103233158 A CN103233158 A CN 103233158A CN 2013101490361 A CN2013101490361 A CN 2013101490361A CN 201310149036 A CN201310149036 A CN 201310149036A CN 103233158 A CN103233158 A CN 103233158A
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Abstract
The invention relates to a quick cooling decarburization method of high-carbon chromium iron, which is used for overcoming the defect that the carbon content of the high-carbon chromium iron is high. The quick cooling decarburization method comprises the following steps of: quickly cooling for separating out graphite to prepare cast ingot in a smelting-casting process of the high-carbon chromium iron; and carrying out crushing, ball-milling and milling, and separating the separated-out graphite particles by adopting a microwave heating method to prepare chromium iron powder with low carbon content. The quick cooling decarburization method is advanced in process, full and accurate in data; the graphite is firstly separated out by a quick cooling method, and the graphite particles are removed through crushing and a microwave heating method, so that the decarburization effect is good, and the carbon content of the high-carbon chromium iron is not more than 3%, and therefore, the quick cooling decarburization method is a very ideal decarburization method of the high-carbon chromium iron.
Description
Technical field
The present invention relates to a kind of quick cooling decarbonization method of high carbon ferro-chrome, belong to high carbon ferro-chrome and reduce the method for carbon content and the technical field of application.
Background technology
The chrome-bearing alloy steel is most important structural metallic materials, the main raw of preparation chrome-bearing alloy steel is high carbon ferro-chrome, high carbon ferro-chrome contains carbon, phosphorus objectionable impurities, must remove or reduce its content, the chrome-bearing alloy steel is strict to the requirement of high carbon ferro-chrome, its carbon content is necessary＜and 7%, otherwise the increase of carbon content will influence the mechanical property of chrome-bearing alloy steel.
At present, high carbon ferro-chrome is produced by the hot stove in ore deposit, and its carbon content mostly reaches 8%, has exceeded the carbon index of the used high carbon ferro-chrome of chrome-bearing alloy steel, so must reduce the carbon content of high carbon ferro-chrome.
The method that reduces the high carbon ferro-chrome carbon content also has various ways, for example vacuum solid-state decarburization process, liquid smelting temperature and slag type are adjusted carbon rejection processes, Converter Oxigen Blowing carbon rejection processes, to reach the purpose that reduces the high carbon ferro-chrome carbon content, but also there are many drawbacks in these methods, for example complex process, the production cycle is long, product cost is high, environmental pollution is serious so that improved the production cost of chrome-bearing alloy steel and limited the production quantity of chrome-bearing alloy steel.
Summary of the invention
Goal of the invention
The objective of the invention is the situation at background technology, adopt and in the high-carbon chrome iron for smelting casting cycle, fast ingot casting is cooled off, make carbon content≤3% of high carbon ferro-chrome, with save energy, enhance productivity, reach the purpose of quick decarburization.
Technical scheme
The chemical substance material that the present invention uses is: high carbon ferro-chrome, clean water, it is as follows that it prepares consumption: with kilogram, be upgraded to measure unit
High carbon ferro-chrome: FeCr55C1000 100 kg ± 1 kg
Clean water: H
2O 10000 L ± 100 L
The cooling decarbonization method is as follows fast:
(1) high carbon ferro-chrome stripping and slicing
Take by weighing high carbon ferro-chrome 100kg, cut into the bulk of 100mm * 50mm * 80mm with machinery;
(2) melting high carbon ferro-chrome
The melting of high carbon ferro-chrome is carried out in the melting resistance furnace, finishes in heat-processed;
1. take by weighing high carbon chromium iron block 100kg, add in the melting resistance furnace;
2. the opening resistor smelting furnace heats the high carbon chromium iron block, and 20 ℃/min of rate of heating is heated to 1600 ℃ ± 10 ℃, and the high carbon ferro-chrome fusing becomes melt;
(3) indigenous graphite is cooled off in high carbon ferro-chrome melt casting fast
The casting of high carbon ferro-chrome melt is carried out in mold, and cooling is finished in the water cycle cooling trough outside fast;
1. mold is placed in the cooling trough, the water coolant in the circulating water channel will flood 9/10 of mold volumes;
2. open water pump on the cooling trough and water intaking valve, outlet valve, make the clean water flow circuit in the cooling trough, clean water velocity of flow 100L/min;
3. casting is aimed at mold with the high carbon ferro-chrome melt and is cast, till filling with;
4. cooling, the high carbon ferro-chrome melt is cooled off fast by the clean water that flows in casting cycle, and more than 1000 ℃ the time, speed of cooling is 1-5 ℃/s, and below 1000 ℃ the time, speed of cooling is 0.1-1 ℃/s;
The cooling back is the high carbon ferro-chrome ingot casting of graphitiferous fast;
(4) broken, powder process
1. the high carbon ferro-chrome ingot casting with graphitiferous cuts into bulk with machinery, and bulk is of a size of 5mm * 8mm * 5mm;
2. crusher in crushing places block high carbon ferro-chrome and carries out fragmentation in the crusher, becomes particulate state, particle diameter≤Ф 2mm;
3. ball milling powder process places the high carbon ferro-chrome particle and carries out ball milling in the ball mill, and ball milling revolution 30r/min becomes the high-carbon chromium iron of graphitiferous particle behind the ball milling;
(5) microwave heating removes graphite granule
The high-carbon chromium iron of graphitiferous particle is placed microwave oven, carry out microwave heating, 600 ℃ ± 5 ℃ of Heating temperatures, constant temperature soaking time 10min;
High-carbon chromium iron will carry out oxidizing reaction in microwave heating process, remove graphite granule, close microwave oven then, make the high-carbon chromium iron that removes graphite granule naturally cool to 25 ℃ with stove;
The cooling back is the ferrochrome powder of carbon content≤3%;
(6) detect, analyze, characterize
Pattern, color and luster, the chemical ingredients of ferrochrome powder to carbon content≤3% of preparation detects, analyzes, characterizes;
Carry out the carbon content analysis with carbon analyzer;
Conclusion: the ferrochrome powder after the decarburization is the grey black powder, carbon content≤3%.
Beneficial effect
The present invention compares with background technology has tangible advance, be at the high drawback of carbon content in the high-carbon chrome iron for smelting process, employing is cooled off indigenous graphite fast in high carbon ferro-chrome melting casting cycle, make ingot casting, carry out fragmentation then, ball milling, powder process, remove graphite granule with microwave heating method, make the low ferrochrome powder of carbon content, this method technology advanced person, informative data is accurate, uses earlier method for quick cooling indigenous graphite, through powder crushing process, the graphite granule in the ferrochrome powder is removed in microwave heating, decarburization is effective, can make carbon content≤3% of ferrochrome, is the decarbonization method of very good high carbon ferro-chrome.
Description of drawings
Fig. 1 casts, cools off fast the decarburization state graph for the high carbon ferro-chrome melt
Fig. 2 is high carbon ferro-chrome decarburization after product shape appearance figure
Shown in the figure, list of numerals is as follows:
1, cooling trough, 2, casting die, 3, the high carbon ferro-chrome melt, 4, water coolant, 5, water intaking valve, 6, outlet valve, 7, water pump, 8, electric control box, 9, display screen, 10, pilot lamp, 11, power switch, 12, water pump controller, 13, discharge modulator, 14, time controller, 15, lead, 16, groove lid, 17, anchor.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing:
Shown in Figure 1, cast, cool off fast the decarburization state graph for the high carbon ferro-chrome melt, each position, annexation want correct, according to quantity proportioning, operation according to the order of sequence.
The casting of the melt of high carbon ferro-chrome, cooling off decarburization fast and carry out in cooling trough, is to finish under the quick cooling of water cycle outside;
Cooling trough 1 is the rectangular parallelepiped rectangle, is groove lid 16 on cooling trough 1 top, and inside is water coolant 4, groove lid 16 at cooling trough 1 is put casting die 2, and fixing by anchor 17, casting die places water coolant 4, and water coolant 4 will flood 9/10 of casting die 2 volumes; Upper right quarter at cooling trough 1 is provided with water intaking valve 5, and water intaking valve 5 connects water pumps 7, is provided with outlet valve 6 at the lower left quarter of cooling trough 1; Right part at cooling trough 1 is provided with electric control box 8, is provided with display screen 9, pilot lamp 10, power switch 11, water pump controller 12, discharge modulator 13, time controller 14 at electric control box 8; Water pump 7 is connected with electric control box 8 by lead 15.
Shown in Figure 2, be high carbon ferro-chrome decarburization after product shape appearance figure, as can be known, the ferrochrome that carbon content is low is the grey black powder, is irregular stacking among the figure.
Claims (2)
1. the quick cooling decarbonization method of a high carbon ferro-chrome is characterized in that: use
The chemical substance material is: high carbon ferro-chrome, clean water, it is as follows that it prepares consumption: with kilogram, be upgraded to measure unit
High carbon ferro-chrome: FeCr55C1000 100 kg ± 1 kg
Clean water: H
2O 10000 L ± 100 L
The cooling decarbonization method is as follows fast:
(1) high carbon ferro-chrome stripping and slicing
Take by weighing high carbon ferro-chrome 100kg, cut into the bulk of 100mm * 50mm * 80mm with machinery;
(2) melting high carbon ferro-chrome
The melting of high carbon ferro-chrome is carried out in the melting resistance furnace, finishes in heat-processed;
1. take by weighing high carbon chromium iron block 100kg, add in the melting resistance furnace;
2. the opening resistor smelting furnace heats the high carbon chromium iron block, and 20 ℃/min of rate of heating is heated to 1600 ℃ ± 10 ℃, and the high carbon ferro-chrome fusing becomes melt;
(3) indigenous graphite is cooled off in high carbon ferro-chrome melt casting fast
The casting of high carbon ferro-chrome melt is carried out in mold, and cooling is finished in the water cycle cooling trough outside fast;
1. mold is placed in the cooling trough, the water coolant in the circulating water channel will flood 9/10 of mold volumes;
2. open water pump on the cooling trough and water intaking valve, outlet valve, make the clean water flow circuit in the cooling trough, clean water velocity of flow 100L/min;
3. casting is aimed at mold with the high carbon ferro-chrome melt and is cast, till filling with;
4. cooling, the high carbon ferro-chrome melt is cooled off fast by the clean water that flows in casting cycle, and more than 1000 ℃ the time, speed of cooling is 1-5 ℃/s, and below 1000 ℃ the time, speed of cooling is 0.1-1 ℃/s;
The cooling back is the high carbon ferro-chrome ingot casting of graphitiferous fast;
(4) broken, powder process
1. the high carbon ferro-chrome ingot casting with graphitiferous cuts into bulk with machinery, and bulk is of a size of 5mm * 8mm * 5mm;
2. crusher in crushing places block high carbon ferro-chrome and carries out fragmentation in the crusher, becomes particulate state, particle diameter≤Ф 2mm;
3. ball milling powder process places the high carbon ferro-chrome particle and carries out ball milling in the ball mill, and ball milling revolution 30r/min becomes the high-carbon chromium iron of graphitiferous particle behind the ball milling;
(5) microwave heating removes graphite granule
The high-carbon chromium iron of graphitiferous particle is placed microwave oven, carry out microwave heating, 600 ℃ ± 5 ℃ of Heating temperatures, constant temperature soaking time 10min;
High-carbon chromium iron will carry out oxidizing reaction in microwave heating process, remove graphite granule, close microwave oven then, make the high-carbon chromium iron that removes graphite granule naturally cool to 25 ℃ with stove;
The cooling back is the ferrochrome powder of carbon content≤3%;
(6) detect, analyze, characterize
Pattern, color and luster, the chemical ingredients of ferrochrome powder to carbon content≤3% of preparation detects, analyzes, characterizes;
Carry out the carbon content analysis with carbon analyzer;
Conclusion: the ferrochrome powder after the decarburization is the grey black powder, carbon content≤3%.
2. the quick cooling decarbonization method of a kind of high carbon ferro-chrome according to claim 1 is characterized in that: the melt casting of high carbon ferro-chrome, cooling off decarburization fast and carry out in cooling trough, is to finish under the quick cooling of water cycle outside;
Cooling trough (1) is the rectangular parallelepiped rectangle, it is groove lid (16) on cooling trough (1) top, inside is water coolant (4), groove lid (16) at cooling trough (1) is put casting die (2), and it is fixing by anchor (17), casting die places water coolant (4), and water coolant (4) will flood 9/10 of casting die (2) volume; Upper right quarter at cooling trough (1) is provided with water intaking valve (5), and water intaking valve (5) connects water pump (7), is provided with outlet valve (6) at the lower left quarter of cooling trough (1); Right part at cooling trough (1) is provided with electric control box (8), is provided with display screen (9), pilot lamp (10), power switch (11), water pump controller (12), discharge modulator (13), time controller (14) at electric control box (8); Water pump (7) is connected with electric control box (8) by lead (15).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106217794A (en) * | 2016-06-30 | 2016-12-14 | 李双阳 | A kind of auto parts and components chiller |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101161845A (en) * | 2007-11-28 | 2008-04-16 | 中国船舶重工集团公司第十二研究所 | Synthetic cast iron for production of hydraulic piece and preparation method thereof |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101161845A (en) * | 2007-11-28 | 2008-04-16 | 中国船舶重工集团公司第十二研究所 | Synthetic cast iron for production of hydraulic piece and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 陈津等: "高碳铬铁显微结构及其对固相脱碳的影响", 《电子显微学报》, vol. 32, no. 2, 15 April 2013 (2013-04-15), pages 105 - 114 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106217794A (en) * | 2016-06-30 | 2016-12-14 | 李双阳 | A kind of auto parts and components chiller |
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