CN1037195C - Pulverized coal belt type pellet roasting device and method - Google Patents
Pulverized coal belt type pellet roasting device and method Download PDFInfo
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- CN1037195C CN1037195C CN 94107331 CN94107331A CN1037195C CN 1037195 C CN1037195 C CN 1037195C CN 94107331 CN94107331 CN 94107331 CN 94107331 A CN94107331 A CN 94107331A CN 1037195 C CN1037195 C CN 1037195C
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- 239000008188 pellet Substances 0.000 title claims abstract description 100
- 239000003245 coal Substances 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 17
- 239000000446 fuel Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000009826 distribution Methods 0.000 claims abstract description 10
- 238000009423 ventilation Methods 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims description 21
- 239000000428 dust Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims 1
- 239000000843 powder Substances 0.000 abstract description 15
- 239000012141 concentrate Substances 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 238000002844 melting Methods 0.000 abstract description 3
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 9
- 239000011230 binding agent Substances 0.000 description 5
- 238000005453 pelletization Methods 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 2
- 239000003830 anthracite Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- -1 flux Substances 0.000 description 1
- 239000002529 flux (metallurgy) Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
一种煤粉带式球团焙烧装置及方法，特别适用于铁精矿粉及其它金属矿粉生产氧化球团矿。它由生球团制备系统、球团焙烧系统、煤粉制备与配送系统三部分组成，其特点是1.焙烧炉采用顶部燃烧供热方式，2.焙烧燃料全部采用煤粉，3.球团焙烧过程各段全采用抽风方式，4.焙烧系统采用生球团预热器。本发明的优点在于：解决了球团料层过湿破坏问题，避免了球团料层局部过熔现象，降低了生产成本，提高了球团矿焙烧质量，简化了设备。
A pulverized coal belt-type pellet roasting device and method are particularly suitable for producing oxidized pellets from iron concentrate powder and other metal ore powders. It consists of three parts: green pellet preparation system, pellet roasting system, and coal powder preparation and distribution system. Its characteristics are: 1. The roasting furnace adopts the top combustion heating method; 2. The roasting fuel is all coal powder; 3. The pellets All stages of the roasting process adopt ventilation mode, 4. The roasting system adopts green pellet preheater. The invention has the advantages of solving the problem of over-humidity damage to the pellet material layer, avoiding the phenomenon of local over-melting of the pellet material layer, reducing production cost, improving the roasting quality of the pellet ore, and simplifying equipment.
Description
本发明属于细精矿粉造块领域，特别适合于铁精矿粉及其它金属矿粉生产氧化球团矿。The invention belongs to the field of fine ore powder agglomeration, and is particularly suitable for producing oxidized pellets from iron ore powder and other metal ore powders.
现有技术中带式氧化球团焙烧装置分生球制备系统，球团焙烧系统二大部分，生产工序为：细精矿粉经加水和粘结剂经混合机混合，造球机造球后，经布料器布到带式焙烧机台车上，然后经过300～400℃鼓风、抽风干燥段，900～1000℃预热段，1200～1300℃焙烧段，800～900℃抽风均热段和鼓风冷却段后，经机尾卸下焙烧好的氧化球团矿。这种带式球团焙烧机需使用气体或液体燃料作为焙烧球团的燃料，气体或液体燃料价格昂贵，同时为了避免大型烧嘴高温火焰对料面的强热辐射，避免使料层表面局部产生过烧，燃烧室需设在焙烧炉的两侧，燃料在燃烧室燃烧后，热废气进入带式球团焙烧机的烟罩内通过对流传热加热球团料层，这种焙烧炉结构复杂、庞大。为避免冷生球团在抽风干燥过程中，料层下部产生过湿层。现有的带式球焙烧机在抽风干燥前需设鼓风干燥段，使得球团焙烧工艺过程变得复杂，工艺气流不易控制，同时由于鼓风干燥段本身及其中间密封占去了焙烧面积，降低了熔烧机的利用系数。现有技术中，球团的冷却是鼓风冷却使得下层球团因高温停留时间短，球团质量不好。综上所述，现有技术中的带式球团焙烧机在结构和工艺方法上存在着不足和缺陷。In the prior art, the belt-type oxidized pellet roasting device consists of a green pellet preparation system and two parts of the pellet roasting system. The production process is as follows: the fine ore powder is mixed with water and binder by a mixer, and pelletized by a pelletizing machine. , through the distributor to the belt-type roasting machine trolley, and then go through the 300-400°C blowing and exhausting drying section, the 900-1000°C preheating section, the 1200-1300°C roasting section, and the 800-900°C exhausting and soaking section After the air blast cooling section, the roasted oxidized pellets are unloaded through the tail of the machine. This belt-type pellet roasting machine needs to use gas or liquid fuel as the fuel for roasting pellets. Gas or liquid fuel is expensive. For overburning, the combustion chamber should be located on both sides of the roaster. After the fuel is burned in the combustion chamber, the hot waste gas enters the smoke hood of the belt pellet roaster to heat the pellet layer by convection heat transfer. This roaster structure Complicated and huge. In order to avoid the over-humid layer in the lower part of the material layer during the air-drying process of cold green pellets. The existing belt-type ball roasting machine needs to install a blast drying section before the exhaust drying, which makes the pellet roasting process complicated and the process air flow is difficult to control. At the same time, the blast drying section itself and its intermediate seal occupy the roasting area. , reducing the utilization factor of the melting machine. In the prior art, the pellets are cooled by blowing air so that the pellets in the lower layer have a short residence time due to high temperature and the quality of the pellets is not good. In summary, the belt pellet roaster in the prior art has deficiencies and defects in structure and process.
本发明的目的在于提供一种煤粉带式球团焙烧装置及方法，该装置及方法不仅可以提供更适合球团焙烧制度要求，更均匀的焙烧温度场，更合理的工艺气流分布，而且100％采用煤粉作燃料，降低了燃料成本，简化了装置的结构和流程，提高球团质量。The object of the present invention is to provide a coal powder belt type pellet roasting device and method, which can not only provide a more suitable pellet roasting system, a more uniform roasting temperature field, and a more reasonable process air flow distribution, but also 100 % Using pulverized coal as fuel reduces fuel cost, simplifies the structure and process of the device, and improves pellet quality.
为了达到上述目的，本发明煤粉带式球团焙烧装置由生球团制备系统、球团焙烧系统、煤粉制备与配送系统三大部分组成。其中，生球团制备系统由煤粉仓、精矿仓、熔剂仓、粘结剂仓、配料系统、混合机、造球机组成。球团焙烧系统由生球团预热器、宽皮带布料机、铺底料仓、热风加压风机，抽风干燥炉、抽风焙烧炉、抽风保温炉、焙烧机台车、低温抽风箱组、中温抽风箱组、高温抽风箱组、机尾抽风箱组、抽风机、风量调阀、除尘器、烟囱、煤粉烧嘴、热风喷嘴等组成，煤粉制备与配送系统由原煤堆、破碎机、煤仓、定量给煤机、磨煤机、煤粉加压风机、煤粉分配器等组成。In order to achieve the above purpose, the pulverized coal belt type pellet roasting device of the present invention is composed of three major parts: a green pellet preparation system, a pellet roasting system, and a pulverized coal preparation and distribution system. Among them, the green pellet preparation system consists of a coal powder bin, a concentrate bin, a flux bin, a binder bin, a batching system, a mixer, and a pelletizing machine. The pellet roasting system consists of a raw pellet preheater, a wide belt distributing machine, a bottom bunker, a hot air pressurized fan, a draft drying furnace, a draft roasting furnace, a draft holding furnace, a roasting machine trolley, a low-temperature draft box group, and a medium-temperature draft Box group, high temperature exhaust box group, tail exhaust box group, exhaust fan, air volume control valve, dust collector, chimney, pulverized coal burner, hot air nozzle, etc. The pulverized coal preparation and distribution system consists of raw coal pile, crusher, coal Bin, quantitative coal feeder, coal mill, pulverized coal pressurized fan, pulverized coal distributor, etc.
本发明煤粉带式球团焙烧装置及方法的主要特点是：The main features of the pulverized coal belt type pellet roasting device and method of the present invention are:
1、本发明在焙烧系统中采用生球团预热器，将生球团用焙烧机的热废气先预热到60℃以上，然后再布到焙烧机台车上，由于生球温度已超过了露点温高，在焙烧机的抽风干燥过程中不会产生过湿破坏，影响料层的透气性。固此，本发明在焙烧系统不设鼓风干燥段，只设抽风干燥段，简化了工艺流程，有效地提高了球团焙烧系统的利用系数。1. The present invention adopts a green pellet preheater in the roasting system to preheat the hot exhaust gas of the green pellet roasting machine to above 60°C, and then distribute it on the roasting machine trolley. Since the temperature of the green pellets has exceeded In addition to the high dew point temperature, there will be no over-humidity damage during the ventilation and drying process of the roaster, which will affect the air permeability of the material layer. In view of this, the present invention does not set up a blast drying section in the roasting system, but only sets up a draft drying section, which simplifies the process flow and effectively improves the utilization factor of the pellet roasting system.
2、本发明的球团焙烧系统中的抽风焙烧炉采用矮炉膛，炉顶到焙烧机台车上的球团料层最上层的距离为0.6～1.2米，多个烧嘴与热风喷嘴密集分布于抽风焙烧炉炉顶，采用顶部供热方式彼此配合直接向球团料面供热，燃料全部采用煤粉，降低了燃料成本，抽风焙烧炉的温度调节是通过控制定量给煤机的给煤量来控制，这种供热方式，可以形成一个更适合球团焙烧制度要求，更均匀的焙烧炉温度场，由于没有大型烧嘴集中在料面上某一点燃烧，所以不会产生火焰下由强热幅射产生的局部高温过熔现象。2. The draft roasting furnace in the pellet roasting system of the present invention adopts a short hearth, the distance from the top of the furnace to the uppermost layer of the pellet material layer on the roasting machine trolley is 0.6 to 1.2 meters, and a plurality of burners and hot air nozzles are densely distributed On the roof of the draft roaster, the top heating method is used to cooperate with each other to directly supply heat to the pellet material surface. The fuel is all pulverized coal, which reduces the fuel cost. The temperature adjustment of the draft roaster is controlled by the coal feeder of the quantitative coal feeder. This way of heating can form a more uniform temperature field of the roasting furnace that is more suitable for the pellet roasting system. Since there are no large burners that burn at a certain point on the material surface, there will be no flame under the flame. Local high-temperature over-melting phenomenon caused by strong heat radiation.
3、本发明的干燥段、焙烧段、保温段和冷却段全部采用抽风，而不设鼓风干燥和鼓风冷却段，余热通过抽风机、回风管道循环利用，低温抽风箱组(35)的平均废气温度控制在60～120℃中温抽风箱组(38)的平均废气温度控制在300～400℃，高温抽风箱组(39)的平均废气温度控制在500～800℃，机尾抽风箱组(40)的平均废气温度控制在300～400℃。这种方式环境条件好，设备和流程简单，工艺气流可灵活调整，操作方便。焙烧机台车上的下层球团，可在高温区停留更长的时间，解决了现有的带式焙烧机下层球团高温停留时间短、质量差的问题。3. The drying section, roasting section, heat preservation section and cooling section of the present invention all adopt air extraction, without blast drying and blast cooling section, waste heat is recycled through exhaust fan and return air duct, and the low-temperature exhaust box group (35) The average exhaust gas temperature of the medium-temperature exhaust air box group (38) is controlled at 300-400 °C, and the average exhaust gas temperature of the high-temperature exhaust air box group (39) is controlled at 500-800 °C. The average exhaust gas temperature of group (40) is controlled at 300-400°C. This method has good environmental conditions, simple equipment and process, flexible adjustment of process airflow, and convenient operation. The lower-layer pellets on the trolley of the roasting machine can stay in the high-temperature zone for a longer time, which solves the problems of short high-temperature residence time and poor quality of the lower-layer pellets of the existing belt roaster.
本发明的工艺过程如下：精矿粉、熔剂、粘结剂、其它添加剂、无烟煤粉在生球团制备系统中按比例进行配料、混合、造球，造好的生球团经过生球团预热器预热到平均60℃以上，再通过宽皮带布料器布到焙烧机台车上，随着焙烧机台车向前移动，球团依次进入抽风干燥炉、抽风焙烧炉、抽风保温炉、冷却段到尾部卸下焙烧好的氧化球团矿。焙烧炉的煤粉燃料来自煤粉制备和配送系统，各温度范围的热废气通过抽风机、回风管道送入各段所需部位，循环利用或者通过除尘器、烟囱排入大气中，各抽风箱组的平均废气温度的控制范围要根据制造球团的原料来确定。The technological process of the present invention is as follows: Concentrate powder, flux, binder, other additives, and anthracite powder are proportioned, mixed, and pelletized in the green pellet preparation system. The heater is preheated to an average temperature above 60°C, and then spread onto the roasting machine trolley through a wide belt distributor. As the roasting machine trolley moves forward, the pellets enter the draft drying furnace, draft roasting furnace, draft holding furnace, The roasted oxidized pellets are unloaded from the cooling section to the tail. The pulverized coal fuel of the roaster comes from the pulverized coal preparation and distribution system. The hot exhaust gas in each temperature range is sent to the required parts of each section through the exhaust fan and the return air duct, and is recycled or discharged into the atmosphere through the dust collector and the chimney. The control range of the average exhaust gas temperature of the box group should be determined according to the raw materials for making pellets.
本发明装置中的生球团制备系统换成球团烧结法造球系统，本发明可用于球团烧结法生产。The green pellet preparation system in the device of the present invention is replaced by the pelletizing system of the pellet sintering method, and the present invention can be used in the production of the pellet sintering method.
与现有技术相比，本发明的优点在于：Compared with the prior art, the present invention has the advantages of:
1、由于在抽风焙烧炉中采用多个烧嘴与热风喷嘴密集分布于炉顶的供热方式，提供了更适合球团焙烧制度要求，更均匀的焙烧温度场，解决了球团料面局部过熔现象。1. Due to the use of multiple burners and hot air nozzles densely distributed on the roof of the furnace for heating in the draft roasting furnace, it provides a more suitable pellet roasting system, a more uniform roasting temperature field, and solves the local problem of pellet material surface. Overmelt phenomenon.
2、本发明在生球团焙烧系统中采用生球团预热器，将生球团用焙烧机的热废气预热到平均60℃以上，由于生球团温度已超过了露点温度，这样在焙烧系统的抽风干燥段，球团料层不会产生过湿破坏，因此，可不设鼓风干燥段，有效地提高了球团焙烧系统的利用系数，简化了设备和流程。2. The present invention uses a green pellet preheater in the green pellet roasting system to preheat the hot waste gas of the green pellet roasting machine to an average of 60°C or more. Since the temperature of the green pellets has exceeded the dew point temperature, the In the draft drying section of the roasting system, the pellet material layer will not be damaged by over-humidity. Therefore, the blast drying section can be omitted, which effectively improves the utilization factor of the pellet roasting system and simplifies the equipment and process.
3、本发明球团焙烧系统的干燥、焙烧、保温、冷却各段全部采用抽风方式，解决了现有带式焙烧机下层球团高温停留时间短、质量差的问题，提高了球团的质量，简化了工艺流程，操作方便。3. The drying, roasting, heat preservation, and cooling sections of the pellet roasting system of the present invention all adopt the ventilation mode, which solves the problems of short high-temperature residence time and poor quality of the pellets in the lower layer of the existing belt roaster, and improves the quality of the pellets , Simplified the process flow, easy to operate.
4、本发明的燃料全部采用煤粉，降低了燃料成本。4. The fuel of the present invention all adopts pulverized coal, which reduces fuel cost.
下面结合附图对本发明煤粉带式球团焙烧装置及方法作进一步说明。The pulverized coal belt type pellet roasting device and method of the present invention will be further described below in conjunction with the accompanying drawings.
附图为本发明煤粉带式球团焙烧装置的结构示意图。The accompanying drawing is a schematic structural view of the pulverized coal belt type pellet roasting device of the present invention.
图中，1为原煤堆，2为破碎机，3为煤仓，4为定量给煤机，5为磨煤机，6为煤粉加压风机，7为一级煤粉分配器，8为二级煤粉分配器，9为保温炉风量调节阀，10为焙烧炉风量调节阀，11为抽风保温炉，12为煤粉烧嘴，13为热风喷嘴，14为抽风焙烧炉，15为抽风干燥炉，16为热风加压风机，17为宽皮带布料机，18为生球团预热器，19为铺底料仓，20为生球筛分输送系统，21为造球机，22为混合料皮带，23为混合机，24为配料系统，25为精矿仓，26为粘结剂仓，27为煤粉仓，28为其它添加剂仓。29为熔剂仓，30为焙烧机台车，31为烟囱，32为排气抽风机，33为除尘器，34为球团预热器风量调阀，35为低温抽风箱组，36为抽风机，37除尘器，38为中温抽风箱组，39为高温抽风箱组，40为机尾抽风箱组，41为机尾抽风机，42为高温抽风机。In the figure, 1 is the raw coal pile, 2 is the crusher, 3 is the coal bunker, 4 is the quantitative coal feeder, 5 is the coal mill, 6 is the pulverized coal pressure fan, 7 is the primary coal pulverized distributor, 8 is the Secondary pulverized coal distributor, 9 is the air volume regulating valve of the holding furnace, 10 is the air volume regulating valve of the roasting furnace, 11 is the draft holding furnace, 12 is the pulverized coal burner, 13 is the hot air nozzle, 14 is the draft roasting furnace, and 15 is the draft Drying furnace, 16 is a hot air pressurized fan, 17 is a wide belt distributor, 18 is a preheater for green pellets, 19 is a bottom bunker, 20 is a screening and conveying system for green pellets, 21 is a pelletizer, 22 is a mixing Material belt, 23 is a mixer, 24 is a batching system, 25 is a concentrate bin, 26 is a binder bin, 27 is a pulverized coal bin, and 28 is other additive bins. 29 is the flux warehouse, 30 is the roasting machine trolley, 31 is the chimney, 32 is the exhaust fan, 33 is the dust collector, 34 is the air volume control valve of the pellet preheater, 35 is the low temperature exhaust box group, 36 is the exhaust fan , 37 dust collectors, 38 for the medium temperature exhaust air box group, 39 for the high temperature exhaust air box group, 40 for the tail exhaust air box group, 41 for the tail exhaust fan, and 42 for the high temperature exhaust fan.
本发明的工艺流程是这样实现的：在生球团制备系统中，精矿粉与添加剂、熔剂、粘结剂、无烟煤粉(用量，根据矿种不同控制在0～1.5％范围内)按比例进行配料、混合、造球，这部分工艺与现有技术相同，不详细描述。造好的生球团过筛后送入生球团预热器(18)中，生球团预热器的热风来自焙烧机中温抽风箱组(38)，经热风加压风机(16)加压后送入生球团预热器(18)中，生球团预热器(18)排出的120～150℃废气直接排入大气，预热到60℃以上的生球团由宽皮带布料器(17)布到焙烧机台车(30)上，在布球团之前焙烧机台车(30)上要由铺底料仓(19)先铺一层铺底料和护边料，布好料的台车(30)向前移动进入焙烧机的抽风干燥炉(15)，抽风干燥炉(15)的热风来自焙烧机中温抽风箱组(38)，中温抽风箱组(38)的热风经过除尘器(37)除尘，抽风机(36)后一部分送入抽风干燥炉(15)，一部分送生球团预热器(18)。抽风干燥炉(15)的温度根据矿种不同可控制在250～350℃，焙烧机台车(30)向前移动进入抽风焙烧炉(14)，抽风焙烧炉(14)顶部密集分布着多个煤粉烧嘴(12)和多个热风喷嘴(13)，抽风焙烧炉(14)的燃料全部用煤粉，助燃风和向抽风焙烧炉(14)所喷的热风来自于焙烧机中后部的高温风箱组(39)，经高温抽风机(42)送到抽风焙烧炉(14)中。抽风焙烧炉(14)的煤粉燃料来自于煤粉制备与配送系统，煤粉制备与配送系统流程为：原煤取自原煤堆(1)，经破碎机(2)破碎后，送入煤仓(3)，经定量给煤机(4)给入磨煤机(5)，磨出的煤粉经煤粉加压风机(6)加压，再经一级煤粉分配器(7)和二级煤粉分配器(8)进入煤粉烧嘴(12)，抽风焙烧炉(14)内的温度根据矿种不同而不同，抽风焙烧炉(14)前部温度控制在500℃～1000℃，中部温度控制在1100℃～1300℃，后部温降至1100℃～600℃。焙烧机台车(30)继续前进，移入保温炉(11)，保温炉(11)内的热废气来自焙烧机的机尾抽风箱组(40)，经机尾抽风机(41)送入抽风保温炉(11)，抽风保温炉(11)内的温度可达300～450℃。焙烧机头部的低温废气经低温抽风箱组(35)，除尘器(33)，抽风机(32)和烟囱(31)排入大气中，在三条回风管道上，安装有风量调阀(9)，(10)，(34)，用于调节各段的气流平衡。The technical process of the present invention is realized in this way: in the green pellet preparation system, the concentrate powder and additives, fluxes, binders, anthracite powder (consumption, controlled in the range of 0 to 1.5% according to the different types of minerals) in proportion Dosing, mixing, and pelletizing are the same as the prior art and will not be described in detail. After the green pellets are sieved, they are sent into the green pellet preheater (18). The hot air of the green pellet preheater comes from the medium-temperature exhaust air box group (38) of the roaster, and is heated by the hot air pressurization fan (16). After being pressed, it is sent to the green pellet preheater (18), and the waste gas at 120-150°C discharged from the green pellet preheater (18) is directly discharged into the atmosphere, and the green pellets preheated to above 60°C are distributed by a wide belt The device (17) is placed on the roasting machine trolley (30). Before the pellets are placed on the roasting machine trolley (30), a layer of bottoming material and edge protection material should be laid earlier by the bottoming material bin (19). The trolley (30) moves forward and enters the draft drying oven (15) of the roasting machine. The hot air of the draft drying oven (15) comes from the medium temperature exhaust box group (38) of the roaster, and the hot air of the medium temperature exhaust box group (38) passes through the dust removal process. Device (37) is dedusted, and a part is sent into the draft drying oven (15) after the exhaust fan (36), and a part is sent to the raw pellet preheater (18). The temperature of the draft drying furnace (15) can be controlled at 250-350°C depending on the type of ore, and the roasting machine trolley (30) moves forward into the draft roasting furnace (14), and the top of the draft roasting furnace (14) is densely distributed with multiple Pulverized coal burner (12) and a plurality of hot blast nozzles (13), the fuel of draft roasting furnace (14) all use coal powder, and the combustion-supporting air and the hot blast sprayed to draft roasting furnace (14) come from the rear part of roaster The high-temperature bellows group (39) is sent in the draft roasting furnace (14) through the high-temperature exhaust fan (42). The pulverized coal fuel of the ventilation roaster (14) comes from the pulverized coal preparation and distribution system. The process of the pulverized coal preparation and distribution system is as follows: the raw coal is taken from the raw coal pile (1), crushed by the crusher (2), and sent to the coal bunker (3), fed into the coal mill (5) through the quantitative coal feeder (4), the pulverized coal is pressurized by the pulverized coal pressurization fan (6), and then passed through the first-level pulverized coal distributor (7) and The secondary pulverized coal distributor (8) enters the pulverized coal burner (12), and the temperature in the draft roasting furnace (14) varies according to the type of ore, and the temperature at the front of the draft roasting furnace (14) is controlled at 500°C to 1000°C , the temperature in the middle is controlled at 1100°C to 1300°C, and the temperature in the rear is reduced to 1100°C to 600°C. The roasting machine trolley (30) moves forward and moves into the holding furnace (11). The hot waste gas in the holding furnace (11) comes from the tail exhaust air box group (40) of the roasting machine, and is sent into the exhaust air box group (40) through the tail exhaust fan (41). Holding furnace (11), the temperature in the draft holding furnace (11) can reach 300～450 ℃. The low-temperature exhaust gas at the head of the roasting machine is discharged into the atmosphere through the low-temperature exhaust air box group (35), the dust collector (33), the exhaust fan (32) and the chimney (31). 9), (10), (34), for adjusting the air flow balance of each section.
本发明煤粉带式球团焙烧装置，如果将生球团制备系统换成球团烧结法的造球系统，本发明可用于球团烧结法生产。The pulverized coal belt type pellet roasting device of the present invention, if the green pellet preparation system is replaced by the pelletizing system of the pellet sintering method, the present invention can be used in the production of the pellet sintering method.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94107331 CN1037195C (en) | 1994-07-04 | 1994-07-04 | Pulverized coal belt type pellet roasting device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94107331 CN1037195C (en) | 1994-07-04 | 1994-07-04 | Pulverized coal belt type pellet roasting device and method |
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| Publication Number | Publication Date |
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| CN1099421A CN1099421A (en) | 1995-03-01 |
| CN1037195C true CN1037195C (en) | 1998-01-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FI121927B (en) * | 2009-08-04 | 2011-06-15 | Outotec Oyj | PROCEDURE AND BAND SINTERING SYSTEM FOR CONTINUOUS SINTERING OF PELLETERED MINERAL MATERIAL |
| CN102401564B (en) * | 2010-09-13 | 2014-12-10 | 五冶集团上海有限公司 | Installation method of belt type roasting machine |
| CN102944112A (en) * | 2012-11-30 | 2013-02-27 | 广西敏诚矿业有限公司 | Box-type automatic sintering device |
| CN103234350A (en) * | 2013-05-23 | 2013-08-07 | 中冶北方（大连）工程技术有限公司 | Hot air supply system for belt type roasting machine |
| CN106435165B (en) * | 2016-08-31 | 2019-01-11 | 山东钢铁股份有限公司 | A kind of pellet sintering equipment |
| CN109237916B (en) * | 2016-09-28 | 2019-10-29 | 青岛科技大学 | A kind of intelligent control drying system of aperture variable density |
| CN110411221B (en) * | 2019-08-19 | 2024-03-08 | 江苏宏大特种钢机械厂有限公司 | Device for fully roasting pellets in belt roasting machine |
| CN112813257B (en) * | 2020-12-30 | 2024-06-21 | 安徽工业大学 | Carbon-free sintering method for providing heat by adopting high wind temperature |
| CN112831652A (en) * | 2020-12-30 | 2021-05-25 | 安徽工业大学 | A carbon-free sintering system using high air temperature to provide heat |
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