CN1062767A - Shaft furnace process is produced the technology and the equipment of limonite pelletizing - Google Patents
Shaft furnace process is produced the technology and the equipment of limonite pelletizing Download PDFInfo
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- CN1062767A CN1062767A CN 91105752 CN91105752A CN1062767A CN 1062767 A CN1062767 A CN 1062767A CN 91105752 CN91105752 CN 91105752 CN 91105752 A CN91105752 A CN 91105752A CN 1062767 A CN1062767 A CN 1062767A
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Abstract
The invention discloses a kind of shaft furnace process and produce the technology and the equipment of limonite pelletizing.Its technical process by existing shaft furnace process is produced the magnetite pelletizing, the improvement of composition of raw materials and equipment makes it to produce the limonite pelletizing, also can produce hematite pellets.It is low that the present invention helps China's grade, and the development and use of the wide iron ore deposit that distributes are for new prospect has been opened up in the development of Iron And Steel Industry.In addition, produce pelletizing and chain grate machine with cold solid method---kiln process is produced pelletizing and is compared, and the present invention also has less investment, and equipment is simple, saves the area, last detective, power consumption is few, and Maintenance and Repair are advantage easily.
Description
The present invention relates to shaft furnace process and produce pellet, particularly a kind of shaft furnace process is produced the technology and the equipment of limonite pelletizing.
Shaft furnace process is produced pellet and is originated in the '30s, and China is in existing this respect of the fifties and trial production.Till now, many enterprises can produce qualified magnetite pelletizing with shaft furnace process, as this steel, Hangzhou Steel Company successful experience are arranged all in this respect.Along with the development of Iron And Steel Industry, abundant ore source is poor day by day.Low in order to make full use of grade, wide limonite resource distributes, people attempt to produce with shaft furnace process the technology and the equipment direct production limonite pelletizing of magnetite pelletizing, but because limonite breeze granularity is very thin, contain mechanical water, crystal water height, no thermopositive reaction, narrow between roast area, cracking temperature of green pellet is low and all do not achieve success.This be because 1, magnetite shaft furnace pelletizing method generally do not have drying unit on raw material is prepared, do not do fine ore processing in small, broken bits yet, can't produce qualified limonite green-ball; 2, the oven dry of the furnace roof in magnetite shaft furnace pelletizing method bed adopts straight form fire grate mostly, and the inclination angle is big, the temperature height, and tolerance is many, the limonite green-ball can stickingly be combed on straight form oven dry bed, and explosion makes that the powder of stove is many, and air-flow is not smooth, caking, wall built-up is serious, can't ordinary production; 3, the type of furnace of the perpendicular Shanghai of the magnetite of tool thermopositive reaction method is sturdy, and air-guiding wall is short and thick, and promptly preheating section is short, the cooling segment length, and roast area is not obvious, and these all are unfavorable for not having the roasting of the limonite pelletizing of thermopositive reaction; 4, shaft furnace bottom discharge device, how employing is single-row in the magnetite palletizing shaft furnace, single oil cylinder, single armed hydraulic drive, sliding surface bearing bearing and thin oil seal, the broken function of this structure is little, and energy consumption is big, sealing difficulty, equipment manufacturing cost height, Maintenance and Repair difficulty.
The present invention is intended to by the improvement to existing equipment and technology, provides a kind of shaft furnace process to produce the technology and the equipment of limonite pelletizing.
According to the present invention, the technology of producing the limonite pelletizing with shaft furnace process comprises: in required ratio with brown fine iron breeze, magnet fine mineral powder, wilkinite, gas ash is prepared burden, baking soil, mixing send and makes the ball chamber and produce green-ball, then green-ball is sieved, allow qualified green-ball carry out roasting by shaft furnace center material distributing machine is uniform in shaft furnace, at last that roasting is good grog is transported to the grog warehouse, uses for blast furnace.
This process characteristic is:
1, the weight percent of each composition of raw materials is:
Brown fine iron breeze 61.5%-94.5%
Magnet fine mineral powder 0%-35%
Wilkinite 1.5%-2%
Gas ash 3%-4%
2, for producing qualified limonite green-ball,, caked high fineness raw material is carried out in small, broken bits, mixing putting into mouse cage shape pulverizer after the above-mentioned raw materials oven dry;
3, by material distributing machine with qualified green-ball cloth to the oven dry bed that is arranged on the shaft furnace top, the 500-800 degree that green-ball is subjected to drawing on the air-guiding wall flows hot gas flow and sees through the wind brush and baking in the slit of being stayed between the herring-bone fire grate, and roll down gradually along venetian blind type oven dry bed, after sloughing moisture content about 10% with about 10 minutes time, fall in the preheating section on shaft furnace top, with the remaining mechanical water of green-ball, crystal water is all sloughed, make ball temperature rise to 1100 degree, be crimson look state, fall into again between the roast area of second meter on the flame road, ball stream discharges rhythm by entering into soaking zone between roast area according to the bottom, improve after the roasting quality of spherolite, again ball slowly is cooled to about 250 degree.Driving discharge device by four moving three quiet both arms double-cylinder hydraulics exports finished ball.
According to the present invention, the equipment of producing the limonite pelletizing with shaft furnace process comprises driving, batch bin, feeding machine, rotary conveyor, pelletizer, circle roller screen extension set, center material distributing machine, shaft furnace, vibro-feeder, elevator car.Its characteristics are:
1, for raw material stoving, in small, broken bits, be provided with dryer and mouse-cage type pulverizer.
2, for preventing that the limonite green-ball from can glue comb at furnace roof, explosion, gas stream in the stove is not smooth, caking, wall built-up is provided with venetian blind type oven dry bed in furnace roof portion.Its inclination angle is little.The oven dry area is big, and temperature becomes stepped appearance to distribute, and air-flow can be gone out from its sideshake, promotes green-ball and slowly moves downwards.
3, be provided with elongated air-guiding wall in the stove, the ratio of its height and width is 12: 1, and zero position will be 3.4 meters away from flame road more than.Stove inner drying section, preheating section, soaking zone, cooling section is 1: 1.97: 2.12 with respect to the length ratio pass of firing section: 4.89: 1.
4, the shaft furnace bottom is provided with four moving three quiet both arms double-cylinder hydraulics and drives discharge devices, and it is by oil cylinder, the both arms link rod, and sealing-ring, quiet roller, action roller, wallboard, bearing constitutes.
Provide embodiments of the invention below in conjunction with accompanying drawing;
Fig. 1 is the technical process and the equipment synoptic diagram thereof of present embodiment;
Fig. 2 is a present embodiment shaft furnace structural representation;
Fig. 3 is that four moving three quiet both arms double-cylinder hydraulics drive the discharge device structural representation.
The operational path of present embodiment and equipment configuration are as follows:
Limonite, magnetite concentrate powder that the outside is transported into train case are discharged in the former feed bin, carry out loose with driving (1) again and neutralization, grab into batch bin (2), disk feeder (3) through its bottom, with brown fine iron breeze, magnet fine mineral powder, wilkinite, gas ash is discharged into rotary conveyor (4) by 65.5%, 30%, 1.5% and 3% weight percent respectively, deliver to dryer (5) again and dry water content about 12%, be discharged on the rotary conveyor (6), send into mouse-cage type pulverizer (7) carry out in small, broken bits with at mixing; Use rotary conveyor (8) to make the batch bin (2) that the ball raw material is returned to former feed bin and deposit more than two hours again with qualified, by lower disk feeding machine (3) material is discharged on rotary conveyor (8), (11), deliver to the hopper (10) of making top, ball chamber, according to the requirement of pelletizer (9), will expect to supply with equably; The green-ball of being made falls into rotary conveyor (12), and circle roller screen extension set (13) screens out wherein bead and powder, turns back to rotary conveyor (8), (11), is transported to the hopper (10) of making top, ball chamber; The qualified green-ball that had sieved falls into rotary conveyor (14), (15), is distributed on the center material distributing machine (16) of two shaft furnaces, carries out roasting with ball is uniform in shaft furnace (17).Roasting is good, the ripe ball warp that has cooled is crossed bottom vibro-feeder (18) it is put into slope hoist dolly (19) lining, with the transition funnel grog is discharged in the skew bridge elevator truck (20) again, then deliver to the grog warehouse, the probabilistic vibration sieve apparatus (21) of bottom is according to the storage condition of grog, termly the ripe ball of major part sieve to rotary conveyor (23), transport in the elevated hopper of blast furnace and use; The ripe ball of small portion uses little skew bridge elevator truck (22) to deliver in the ripe ball storage hopper again, timely and accurately ripe ball is put into rotary conveyor (23), (15) that square crossing is arranged for regulating the working of a furnace, enters material distributing machine (16) and fixes a point, and fills up ripe ball in right amount; The undersized hot returning ore of its probability screen adds top electric precipitation dust and transports back with the rotary conveyor of returning mine (27) and enter batch bin behind mixed again other fine ores of former feed bin and re-use.
The oven dry of shaft furnace, roasting be by burner blower (24), cooling blower (25), and the hot waste gas that produces after the acting in conjunction of blast furnace gas (26) is finished.
Contain mechanical water 14-16%, the qualified green-ball of crystal water 8-10% by material distributing machine (16) with green-ball cloth to the oven dry bed (28) that is arranged on the shaft furnace top, green-ball is subjected to the 500-800 degree hot gas flow that draws on the air-guiding wall (29) and the hot blast that sees through the slit of being stayed between the herring-bone fire grate blown brush and baking, make the mechanical water vaporization, simultaneously, make green-ball roll down gradually along venetian blind type oven dry bed, after sloughing moisture content about 10% with about 10 minutes time, fall in the preheating section on shaft furnace top, with the remaining mechanical water of green-ball, crystal water is all sloughed, and makes ball temperature rise to 1100 degree, be crimson look state, fall into flame road (30) again and go up between the roast area of second meter; Under the hot gas flow effect that ball produces in the combustion chambers (31) of 1150 ± 10 degree, the surface begins to generate calcium ferrite, when it and ferrous metasilicate constantly act on, occur fixed to inside, slaking; Also remove sulfur and other corruption and planted matter.By entering into 2.17 meters long soaking zones between 1 meter long roast area, it has improved ripe ball quality, has reduced surface temperature ball stream according to bottom discharging rhythm; But in order to adapt to discharging, accumulating, the needs of screening, blast cooling air from wearing beam (33) top, ball is cooled to about 250 degree, hand over four moving three quiet both arms double-cylinder hydraulics to drive discharge devices (34) again and carry out fragmentation, be discharged into the unloading in the feed bin (35) of vibro-feeder (8) top.Whole process operation about 900 minutes.Stroke 9-10 rice, do not need solid and liquid fuel, only use the unnecessary coal gas of blast furnace and the air of lower heating value, tolerance is transferred to 1: 1.2 sends into snail cydariform burner (32) respectively, the waste gas oxygen level that burning back produces is controlled in 4% the oxidizing atmosphere and enters roast area, just can obtain stable yields, high yield, fine product.Above-mentioned four moving three quiet both arms double-cylinder hydraulics drive discharge device by oil cylinder (36), both arms link rod (37), and sealing-ring (38), quiet roller (39), action roller (40), wallboard (41), bearing (42) constitutes.
The present invention inherits and has developed the production technology of Shaft Furnace Pelletizing Process method, and decapacitation is used for producing outside the limonite pelletizing, also can produce hematite pellets. It is low to be conducive to China's grade, and the development and use of the wide iron ore deposit that distributes are under the day by day poor situation of abundant ore source, for new prospect has been opened up in the development of steel and iron industry. In addition, produce pelletizing with cold solid method and compare with grate kiln method production pelletizing, the present invention also has small investment, and equipment is simple, saves the area, upper detective, and power consumption is few, and Maintenance and Repair are advantage easily.
Claims (3)
1, a kind of shaft furnace process is produced the technology of limonite pelletizing, and it comprises, in required ratio with brown fine iron breeze, magnet fine mineral powder, wilkinite, gas ash is prepared burden, oven dry, mixing, send again and make the ball chamber and produce green-ball, then green-ball is sieved, allow qualified green-ball carry out roasting by shaft furnace center material distributing machine is uniform in shaft furnace, at last that roasting is good grog is transported to the grog warehouse, use in order to blast furnace, it is characterized in that:
The weight percent of a, each composition of raw materials is:
Brown fine iron breeze 61.5%-94.5%
Magnet fine mineral powder 0%-35%
Wilkinite 1.5%-2%
Gas ash 3%-4%
B, the oven dry after raw material put into mouse cage shape pulverizer, caked high fineness raw material is carried out in small, broken bits, mixing;
C, qualified green-ball by material distributing machine with its cloth to the oven dry bed that is arranged on the shaft furnace top, 500-800 degree hot gas flow that green-ball is subjected to drawing on the air-guiding wall and the hot blast that sees through the slit of being stayed between the herring-bone fire grate blow brush and roll down gradually with baking and along venetian blind type oven dry bed, after sloughing moisture content about 10% with about 10 minutes time, fall in the preheating section on shaft furnace top, with the remaining mechanical water of green-ball, crystal water is all sloughed, make ball temperature rise to 1100 degree, be crimson look state, fall into again between the roast area of second meter on the flame road; Ball stream, is cooled to ball about 250 degree by entering soaking zone between roast area at leisure according to bottom discharging rhythm, hands over four moving three quiet both arms double-cylinder hydraulics to drive discharge device again finished ball is exported.
2, shaft furnace process according to claim 1 is produced the technology of limonite pelletizing, it is characterized in that the weight percent of described composition of raw materials is:
Brown fine iron breeze 65.5%
Magnet fine mineral powder 30%
Wilkinite 1.5%
Gas ash 3%
3, a kind of shaft furnace process is produced the equipment of limonite pelletizing, comprises driving, batch bin, and feeding machine, rotary conveyor, pelletizer, circle roller screen extension set, the center material distributing machine, shaft furnace, vibro-feeder, the elevator car is characterized in that:
(1) adopted dryer and mouse-cage type to morcel machine;
(2) the shaft furnace top is provided with venetian blind type oven dry bed, and its inclination angle is little, and the oven dry area is big, and temperature becomes stepped appearance to distribute, and air-flow can be gone out the promotion green-ball from its sideshake and slowly move downwards;
(3) be provided with elongated air-guiding wall in the stove, the ratio of its height and width is 12: 1, and zero position will be 3.4 meters away from flame road more than, stove inner drying section, and preheating section, soaking zone, cooling section is 1: 1.97: 2.12 with respect to the length ratio pass of firing section: 4.89: 1;
(4) the shaft furnace bottom is provided with four moving three quiet both arms double-cylinder hydraulics and drives discharge device, and it is made of oil cylinder, both arms link rod, sealing-ring, quiet roller, action roller, wallboard, bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91105752 CN1022766C (en) | 1991-08-17 | 1991-08-17 | Brown iron ore ball production technology and equipment by vertical furnace method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91105752 CN1022766C (en) | 1991-08-17 | 1991-08-17 | Brown iron ore ball production technology and equipment by vertical furnace method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1062767A true CN1062767A (en) | 1992-07-15 |
| CN1022766C CN1022766C (en) | 1993-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91105752 Expired - Fee Related CN1022766C (en) | 1991-08-17 | 1991-08-17 | Brown iron ore ball production technology and equipment by vertical furnace method |
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| Country | Link |
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| CN (1) | CN1022766C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463421A (en) * | 2009-01-16 | 2009-06-24 | 湖南华菱湘潭钢铁有限公司 | Method for producing pellet ore by adding iron scale |
| CN102198509A (en) * | 2010-03-23 | 2011-09-28 | 郑永贤 | Method for producing iron concentrate powder by using reductive magnetizing rotary furnace |
| CN103134304A (en) * | 2011-11-25 | 2013-06-05 | 中冶长天国际工程有限责任公司 | Roasting shaft furnace |
| CN105087947A (en) * | 2015-09-16 | 2015-11-25 | 武汉钢铁(集团)公司 | Method for extracting zinc from blast furnace gas mud |
| CN106435164A (en) * | 2016-12-01 | 2017-02-22 | 湘潭瑞通球团有限公司 | Iron-contained waste treatment method and equipment adopting same |
| CN108680003A (en) * | 2018-05-31 | 2018-10-19 | 中钢集团吉林机电设备有限公司 | A kind of ferrochrome pellet roasting rectangle shaft furnace and its method of roasting |
| CN109182735A (en) * | 2018-11-17 | 2019-01-11 | 武钢集团昆明钢铁股份有限公司 | Highly crystalline water limonite sintering method |
-
1991
- 1991-08-17 CN CN 91105752 patent/CN1022766C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463421A (en) * | 2009-01-16 | 2009-06-24 | 湖南华菱湘潭钢铁有限公司 | Method for producing pellet ore by adding iron scale |
| CN102198509A (en) * | 2010-03-23 | 2011-09-28 | 郑永贤 | Method for producing iron concentrate powder by using reductive magnetizing rotary furnace |
| CN103134304A (en) * | 2011-11-25 | 2013-06-05 | 中冶长天国际工程有限责任公司 | Roasting shaft furnace |
| CN103134304B (en) * | 2011-11-25 | 2015-08-19 | 中冶长天国际工程有限责任公司 | A kind of vertical baking furnace |
| CN105087947A (en) * | 2015-09-16 | 2015-11-25 | 武汉钢铁(集团)公司 | Method for extracting zinc from blast furnace gas mud |
| CN106435164A (en) * | 2016-12-01 | 2017-02-22 | 湘潭瑞通球团有限公司 | Iron-contained waste treatment method and equipment adopting same |
| CN108680003A (en) * | 2018-05-31 | 2018-10-19 | 中钢集团吉林机电设备有限公司 | A kind of ferrochrome pellet roasting rectangle shaft furnace and its method of roasting |
| CN108680003B (en) * | 2018-05-31 | 2024-01-19 | 新吉电(吉林)工程技术有限公司 | Rectangular shaft furnace for roasting ferrochrome pellets and roasting method thereof |
| CN109182735A (en) * | 2018-11-17 | 2019-01-11 | 武钢集团昆明钢铁股份有限公司 | Highly crystalline water limonite sintering method |
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| Publication number | Publication date |
|---|---|
| CN1022766C (en) | 1993-11-17 |
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