CN1297818C - Pelle roasting simulation tester and method thereof - Google Patents
Pelle roasting simulation tester and method thereof Download PDFInfo
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- CN1297818C CN1297818C CNB2005100113496A CN200510011349A CN1297818C CN 1297818 C CN1297818 C CN 1297818C CN B2005100113496 A CNB2005100113496 A CN B2005100113496A CN 200510011349 A CN200510011349 A CN 200510011349A CN 1297818 C CN1297818 C CN 1297818C
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- roasting
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a testing device and a method for simulating pellet roasting, which belongs to the field of ironmaking production. The device is composed of a meter (1), a thermal couple (2), a combustion chamber (3), a roasting pan (4), a valve (5), a flow meter (6), a pressure gauge (7), an air pipeline (8), an air combustion supporting pipeline (9), an exhaust gas pipeline (10), a blower fan (11), a natural fuel gas tank (12) and an oxygen tank (13), wherein raw pellets are put in the roasting pan (4), air blown from the blower fan (11) and fuel gas coming from the fuel gas tank (12) enter the combustion chamber for mixing and combustion through the flow meter (6), and the meter (1) and the thermal couple (2) are used for controlling the temperature of the combustion chamber. The technology of the method comprises: the temperature of the raw pellets raises from the room temperature to the temperature of 950 DEG C within 5 min, the raw pellets are preheated for 10 to 15 min, and then, the temperature drops to 1100 DEG C immediately after the raw pellets are roasted for 10 to 20 min at the immediately raised temperature of 1250 DEG C, and the raw pellets are naturally cooled after uniformly heated for 5 min. Roasting equipment modified by the method using the roasting pan can be used for fully transferring heat between flame and the pellets, the materials of the utilized raw pellets are quite less than that of a baking cup, the speed of raising and lowering the temperature is high, the test period is short, and the yield of a finished product is high.
Description
Technical field
The invention belongs to the ironmaking production field, particularly a kind of pellet roasting simulation test device and method of simulating the pelletizing production process in the actual production.
Background technology
In the actual baked for producing process, the pelletizing surface can directly contact with the flame that gas fuel combustion produces, heat will progressively be delivered to the inside of pelletizing then, so the research pelletizing has very big meaning with the situation that contacts of thermal-flame to the manufacturing parameter of determining pelletizing.
In the simulation test procedure that carries out the pellet roasting process, adopt the pelletizing production process in the roasting cup simulation actual production, as band examination burning machine and rotary kiln.The roasting process nearly dried green-ball of 3kg is placed in the roasting sintered cup, be blown into air in certain amount and fuel oil burns by top,, primary combustion gas added combustion air in order to make the more complete of burning, carry out secondary combustion, make flame reach higher temperature.Hot-bulb group carries out from top to bottom in the roasting process of green-ball, high temperature fire combustion and green-ball contact and the radiation of heat is that control transfer of heat is vital in the roasting process to the transmission of heat, and common roasting cup only can contact with flame at the green-ball on top, at the ball that contacts with the furnace wall radiations heat energy transmission preferably can be arranged, roasting cup bottom green-ball and flame are contactless, can not fully burn.Adopt small-sized rotary kiln simulation stove, green-ball can contact with the combustion of burning fire during roasting, but because interval, zone of constant temperature, temperature field is little, and sintering temperature requires more than 1250 ℃, the finished ball quality differs bigger after the roasting.
Summary of the invention
The object of the present invention is to provide a kind of pelletizing roasting simulation test device and method of simulating the pelletizing production process in the actual production, make it more near actual production process, for actual production provides more valuable reference foundation.
A kind of pellet roasting simulation test device, constitute by 1 instrument, 2 thermopairs, 3 firing chambers, 4 roasting dishes, 5 valves, 6 flowmeters, 7 tensimeters, 8 air pipe lines, 9 combustion air pipelines, 10 exhaust pipes, 11 fan blowers, 12 rock gas fuel cartridges, 13 oxygen tanks, it is characterized in that the roasting cup that will in the past adopt changes the roasting dish 4 of having made the strip resistance silk.Free pelletizing in the roasting dish 4, enter firing chamber mixed combustion through flowmeter 6, by instrument 1 and thermopair 2 control chamber temperatures by the combustion gas of coming out in air that bloats in the fan blower 11 and the fuel cartridge 12.In order to make the more complete of burning, primary combustion gas adding combustion air and oxygen are entered firing chamber 3 by valve 5, carry out secondary combustion, make flame reach higher temperature.Green pellets in the roasting dish becomes finished ball through high-temperature fuel gas and roasting dish heating flame.
Adopt the roasting technique system of roasting dish roasting to be: green-ball is raised to 950 ℃ from room temperature in 5min, preheating 10-15min is raised to 1250 ℃ immediately, behind the roasting 15-20min, drops to 1100 ℃ immediately, natural cooling behind the soaking 5min.
Table 1 is compressive strength (N/P) and the yield rate that changes the finished ball of different roasting apparatus roastings
Table 1
| Roasting apparatus | Preheating time | Roasting time | Compressive strength | Yield rate |
| The resistance stone or metal plate for standing a stove on as a precaution against fire | 15 | 15 | 2509 | 90％ |
| The resistance stone or metal plate for standing a stove on as a precaution against fire | 15 | 20 | 2941 | 92％ |
| The roasting cup | 15 | 17 | 2859 | 86％ |
| The roasting cup | 15 | 20 | 2974 | 85％ |
From the result of table 1 as seen, the finished ball compressive strength that adopts different method of roasting to obtain is very identical, but the used 300g green-ball material of method of employing roasting dish will be less than the 3kg green-ball material of roasting cup usefulness far away, and the speed of lifting temperature is fast, test period is short, the yield rate height.
Adopt the improved roasting apparatus of method of roasting dish to make the heat transfer between flame and the pelletizing carry out more thoroughly, used green-ball material will be less than the roasting cup far away, and lifting temperature speed is fast, and the test period is short, the yield rate height.
Description of drawings
Fig. 1 is the oven test structure drawing of device
1 instrument, 2 thermopairs, 3 firing chambers, 4 roasting dishes, 5 valves, 6 flowmeters, 7 tensimeters, 8 air hoses, 9 combustion-aid air pipes, 10 off-gas lines, 11 fan blowers, 12 rock gas fuel cartridges, 13 oxygen tanks.
Embodiment
1. adopt the roasting technique system of roasting dish roasting to be: green-ball is raised to 950 ℃ from room temperature in 5min, preheating 15min is raised to 1250 ℃ immediately, behind the roasting 15min, drops to 1100 ℃ immediately, natural cooling behind the soaking 5min.
2. adopt the roasting technique system of roasting dish roasting to be: green-ball is raised to 950 ℃ from room temperature in 5min, preheating 15min is raised to 1250 ℃ immediately, behind the roasting 20min, drops to 1100 ℃ immediately, natural cooling behind the soaking 5min.
Claims (2)
1, a kind of pellet roasting simulation test device, constitute by instrument (1), thermopair (2), firing chamber (3), valve (5), flowmeter (6), tensimeter (7), air pipe line (8), combustion air pipeline (9), exhaust pipe (10), fan blower (11), rock gas fuel cartridge (12), oxygen tank (13), it is characterized in that the roasting cup that will in the past adopt changes the roasting dish (4) of having made the strip resistance silk; The roasting dish is freeed pelletizing in (4), enters firing chamber mixed combustion by the combustion gas of coming out in air that bloats in the fan blower (11) and the fuel cartridge (12) through flowmeter (6), by instrument (1) and thermopair (2) control chamber temperature; Combustion air and oxygen enter firing chamber (3) by valve (5), carry out secondary combustion.
2, a kind of pellet roasting simulation experiment method is characterized in that adopting the roasting of roasting dish, and the roasting technique system is: green-ball is raised to 950 ℃ from room temperature in 5min, preheating 10-15min is raised to 1250 ℃, behind the roasting 15-20min immediately, drop to 1100 ℃ immediately, natural cooling behind the soaking 5min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100113496A CN1297818C (en) | 2005-02-24 | 2005-02-24 | Pelle roasting simulation tester and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100113496A CN1297818C (en) | 2005-02-24 | 2005-02-24 | Pelle roasting simulation tester and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1651916A CN1651916A (en) | 2005-08-10 |
| CN1297818C true CN1297818C (en) | 2007-01-31 |
Family
ID=34875540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100113496A Expired - Fee Related CN1297818C (en) | 2005-02-24 | 2005-02-24 | Pelle roasting simulation tester and method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1297818C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808078B (en) * | 2012-06-18 | 2013-11-27 | 首钢总公司 | Pellet roasting device |
| CN107557566A (en) * | 2016-06-30 | 2018-01-09 | 鞍钢股份有限公司 | A kind of pelletizing dynamic roasting stove and its application method |
| CN109136443A (en) * | 2018-10-31 | 2019-01-04 | 东北大学 | The prereduction rotary system experimental provision and its experimental method recycled for coal gas |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062553A (en) * | 1990-12-22 | 1992-07-08 | 北京科技大学 | Belt type roasting machine roasting iron ore pellets novel process |
| CN2119630U (en) * | 1990-10-10 | 1992-10-21 | 北京科技大学 | Pellet mini-experimental roaster |
| CN1389574A (en) * | 2002-05-31 | 2003-01-08 | 北京科技大学 | Production process of directly reduced iron with carbon-containing iron ore pellet |
-
2005
- 2005-02-24 CN CNB2005100113496A patent/CN1297818C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2119630U (en) * | 1990-10-10 | 1992-10-21 | 北京科技大学 | Pellet mini-experimental roaster |
| CN1062553A (en) * | 1990-12-22 | 1992-07-08 | 北京科技大学 | Belt type roasting machine roasting iron ore pellets novel process |
| CN1389574A (en) * | 2002-05-31 | 2003-01-08 | 北京科技大学 | Production process of directly reduced iron with carbon-containing iron ore pellet |
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| Publication number | Publication date |
|---|---|
| CN1651916A (en) | 2005-08-10 |
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| SE01 | Entry into force of request for substantive examination | ||
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Granted publication date: 20070131 Termination date: 20100224 |