CN206666572U - Utilize the process system of vanadium titano-magnetite production molten casting iron - Google Patents
Utilize the process system of vanadium titano-magnetite production molten casting iron Download PDFInfo
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 115
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 24
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 238000005266 casting Methods 0.000 title claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 title abstract description 16
- 229910052720 vanadium Inorganic materials 0.000 title 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title 1
- 239000003245 coal Substances 0.000 claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 36
- 238000002844 melting Methods 0.000 claims abstract description 31
- 230000008018 melting Effects 0.000 claims abstract description 31
- 239000002994 raw material Substances 0.000 claims abstract description 31
- 238000001354 calcination Methods 0.000 claims abstract description 24
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 claims abstract description 22
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 19
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 19
- 239000004571 lime Substances 0.000 claims abstract description 19
- 238000002360 preparation method Methods 0.000 claims abstract description 18
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000010936 titanium Substances 0.000 claims abstract description 5
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 26
- 239000008188 pellet Substances 0.000 claims description 16
- 239000000571 coke Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 14
- 235000012255 calcium oxide Nutrition 0.000 claims description 13
- 239000000292 calcium oxide Substances 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 8
- 239000002893 slag Substances 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 6
- 239000006148 magnetic separator Substances 0.000 claims description 6
- 229910000805 Pig iron Inorganic materials 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000006477 desulfuration reaction Methods 0.000 claims description 4
- 230000023556 desulfurization Effects 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 2
- 238000003723 Smelting Methods 0.000 abstract description 10
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 239000003034 coal gas Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 56
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 4
- 238000007726 management method Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000013067 intermediate product Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
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Abstract
本实用新型公开的是一种利用钒钛磁铁矿生产铸造铁水的工艺系统，包括原料制备系统、竖炉直接还原系统、煤气加热系统、煤粉熔分系统、铁水预处理系统和石灰煅烧系统，所述原料制备系统和煤气加热系统分别将原料和还原气体送至竖炉直接还原系统，从竖炉还原系统出来的直接还原铁进入煤粉熔分系统，从竖炉还原系统出来的炉顶煤气进入煤气加热系统和石灰煅烧系统，经煤粉熔分系统分离的含钛铁水进入铁水预处理系统，在石灰煅烧系统的配合下生成铸造铁水。本实用新型将多个冶炼系统整合到一起，提高了资源利用率，节能环保效果显著，从园区角度上可进行统一管理和协调，使生产园区具有活力和较强的产品竞争性。
The utility model discloses a process system for producing casting molten iron by utilizing vanadium-titanium magnetite, including a raw material preparation system, a shaft furnace direct reduction system, a gas heating system, a pulverized coal melting system, a molten iron pretreatment system and a lime calcination system , the raw material preparation system and the gas heating system respectively send raw materials and reducing gas to the direct reduction system of the shaft furnace, the direct reduced iron from the reduction system of the shaft furnace enters the pulverized coal melting system, and the furnace top from the reduction system of the shaft furnace The coal gas enters the gas heating system and the lime calcination system, and the titanium-containing molten iron separated by the pulverized coal melting system enters the molten iron pretreatment system, and the foundry molten iron is produced with the cooperation of the lime calcination system. The utility model integrates a plurality of smelting systems, improves the resource utilization rate, has remarkable energy-saving and environmental protection effects, and can carry out unified management and coordination from the perspective of the park, so that the production park has vitality and strong product competitiveness.
Description
技术领域technical field
本实用新型涉及金属冶炼技术领域，尤其涉及一种利用钒钛磁铁矿生产铸造铁水的工艺系统。The utility model relates to the technical field of metal smelting, in particular to a process system for producing casting molten iron by utilizing vanadium-titanium magnetite.
背景技术Background technique
在我国攀西高原地区，具有非常丰富的钒钛磁铁矿资源，钒钛磁铁矿主要用于提炼含钒钛铁水，其冶炼中间产物富钛渣可生产钛白粉，高炉渣可用于环保建材，最终产物含钒钛铁水可用于生产各类金属器材，可谓应用广泛。由于冶炼过程工序较为繁琐，工程量较大，产物较多，一般以工艺单元为单位分到个各个厂区进行分步冶炼生产。各个工艺分离后，虽然生产管理上更有条理，更细化，也更容易控制，但是各个生产环节所需的能源却不能很好的循环利用，容易造成资源的浪费。随着科技的发展，工业逐渐规模化，产量和效率都在逐年增长，同时也造成了生态环境的日益恶化，因此，如今的工业生产越来越重视资源的整合利用，以便节约生产成本，降低污染排放，提高能源的循环利用率。对于利用钒钛磁铁矿生产铸造铁水的工艺，其中间产物含有较高热能，而反应所需物料又需要热能进行反应，如果能利用好这些热能互换，将大大减少能源消耗，降低生产成本。In the Panxi plateau area of my country, there are very rich resources of vanadium-titanium magnetite. Vanadium-titanium magnetite is mainly used to extract vanadium-titanium-containing molten iron. The smelting intermediate product rich in titanium slag can produce titanium dioxide, and blast furnace slag can be used for environmental protection building materials. , the final product containing vanadium-titanium molten iron can be used to produce various metal equipment, which can be said to be widely used. Since the smelting process is relatively cumbersome, the project volume is large, and the products are many, generally the process unit is divided into each plant area for step-by-step smelting production. After the separation of each process, although the production management is more organized, more detailed, and easier to control, the energy required for each production link cannot be recycled well, which is likely to cause waste of resources. With the development of science and technology, the industry is gradually scaled up, and the output and efficiency are increasing year by year. At the same time, it has also caused the deterioration of the ecological environment. Pollution emission, improve the recycling rate of energy. For the process of using vanadium-titanium magnetite to produce molten iron, the intermediate product contains high heat energy, and the materials required for the reaction need heat energy to react. If these heat energy exchanges can be made good use of, energy consumption and production costs will be greatly reduced. .
实用新型内容Utility model content
为克服现有钒钛磁铁矿冶炼工艺能源循环利用率不高，造成资源浪费等不足，本实用新型所要解决的技术问题是：提供一种综合资源利用率更高的利用钒钛磁铁矿生产铸造铁水的工艺系统。In order to overcome the existing vanadium-titanium-magnetite smelting process energy cycle utilization rate is not high, resulting in resource waste and other deficiencies, the technical problem to be solved by the utility model is: to provide a higher comprehensive resource utilization rate using vanadium-titanium magnetite Process system for producing molten iron for casting.
本实用新型解决其技术问题所采用的技术方案是：The technical scheme that the utility model solves its technical problem adopts is:
利用钒钛磁铁矿生产铸造铁水的工艺系统，包括原料制备系统、竖炉直接还原系统、煤气加热系统、煤粉熔分系统、铁水预处理系统和石灰煅烧系统，所述原料制备系统和煤气加热系统分别将原料和还原气体送至竖炉直接还原系统，从竖炉还原系统出来的直接还原铁进入煤粉熔分系统进行铁水铁渣分离，从竖炉还原系统出来的炉顶煤气进入煤气加热系统和石灰煅烧系统，经煤粉熔分系统分离的含钛铁水进入铁水预处理系统，在石灰煅烧系统的配合下生成铸造铁水。The process system for producing casting molten iron using vanadium-titanium magnetite includes a raw material preparation system, a shaft furnace direct reduction system, a gas heating system, a pulverized coal melting system, a molten iron pretreatment system and a lime calcination system. The raw material preparation system and gas The heating system sends raw materials and reducing gas to the direct reduction system of the shaft furnace respectively. The direct reduced iron from the reduction system of the shaft furnace enters the pulverized coal melting system for separation of molten iron and iron slag, and the top gas from the reduction system of the shaft furnace enters the coal gas The heating system and the lime calcination system, the titanium-containing molten iron separated by the pulverized coal melting system enters the molten iron pretreatment system, and generates casting molten iron with the cooperation of the lime calcination system.
进一步的是，所述原料制备系统包括研磨磁选机、混料机、压球机和烘干机，其中混料机将经研磨磁选机筛选的钒钛精矿粉粒与煤粉和粘接剂混匀后送压球机压制成球团，然后将球团送入烘干机烘干成炼铁原料。Further, the raw material preparation system includes a grinding magnetic separator, a mixer, a ball press and a dryer, wherein the mixer mixes the vanadium-titanium concentrate powder screened by the grinding magnetic separator with coal powder and sticky After the adhesive is mixed, it is sent to a briquette machine to be pressed into pellets, and then the pellets are sent to a dryer to be dried into iron-making raw materials.
进一步的是，所述竖炉直接还原系统包括原料准备装置、受料装置、竖炉本体和出料装置，所述原料准备装置将原料进行筛分，合格原料通过受料装置送至竖炉本体顶部，经过还原后的直接还原铁由出料装置送至粉煤熔分系统。Further, the shaft furnace direct reduction system includes a raw material preparation device, a material receiving device, a shaft furnace body and a discharging device, the raw material preparation device screens raw materials, and qualified raw materials are sent to the shaft furnace body through the material receiving device At the top, the reduced direct reduced iron is sent to the pulverized coal melting system by the discharge device.
进一步的是，所述竖炉本体为气基式还原竖炉，还原气体由煤气加热系统提供，从竖炉本体顶部出来的炉顶煤气送至煤气加热系统对焦炉煤气进行加热还原生成还原气体。Further, the shaft furnace body is a gas-based reducing shaft furnace, and the reducing gas is provided by the gas heating system, and the top gas coming out of the top of the shaft furnace body is sent to the gas heating system for heating and reducing the coke oven gas to generate reducing gas .
进一步的是，所述煤气加热系统包括三座球式加热炉，其中两座球式加热炉接收竖炉直接还原系统出来的炉顶煤气，待炉顶煤气与焦炉煤气反应生成还原气体后通入第三座球式加热炉加热后送至竖炉直接还原系统。Further, the gas heating system includes three spherical heating furnaces, two of which receive the top gas from the direct reduction system of the shaft furnace, and pass through the furnace after the top gas reacts with the coke oven gas to generate reducing gas. After being heated in the third spherical heating furnace, it is sent to the shaft furnace direct reduction system.
进一步的是，所述煤粉熔分系统包括煤粉熔分炉，经竖炉直接还原系统还原后的高温金属化球团通过溜槽输送到煤粉熔分炉炉顶的进料口送入炉内，煤粉通过安装在炉体上的喷枪喷入炉内。Further, the pulverized coal melting system includes a pulverized coal melting furnace, and the high-temperature metallized pellets reduced by the shaft furnace direct reduction system are transported to the feed port on the top of the pulverized coal melting furnace through a chute and fed into the furnace Inside, pulverized coal is sprayed into the furnace through the spray gun installed on the furnace body.
进一步的是，所述石灰煅烧系统在炉顶煤气的煅烧下产生生石灰，生石灰进入铁水预处理系统通过生石灰脱硫工艺对铁水进行预处理，使铁水达到铸造生铁标准。Further, the lime calcination system produces quicklime under the calcination of the furnace top gas, and the quicklime enters the molten iron pretreatment system to pretreat the molten iron through the quicklime desulfurization process, so that the molten iron reaches the casting pig iron standard.
本实用新型的有益效果是：通过将原料制备系统、竖炉直接还原系统、煤气加热系统、煤粉熔分系统、铁水预处理系统和石灰煅烧系统等多个冶炼系统整合到一个生产园区，一体化的生产可缩短物料输送路径，竖炉直接还原系统的炉顶煤气可作为供热源为其它系统提供热能，从而提高了资源利用率，节能环保效果显著，此外，对于铸铁生产，可做到专业化协作，科学布局，紧凑有序，从园区角度上统一管理和协调，使生产园区具有活力和较强的产品竞争性。The beneficial effect of the utility model is: by integrating multiple smelting systems such as the raw material preparation system, the shaft furnace direct reduction system, the gas heating system, the pulverized coal melting system, the molten iron pretreatment system and the lime calcination system into one production park, the integrated The optimized production can shorten the material conveying path, and the top gas of the direct reduction system of the shaft furnace can be used as a heat source to provide heat energy for other systems, thereby improving the utilization rate of resources, and the effect of energy saving and environmental protection is remarkable. In addition, for cast iron production, it can be achieved Professional collaboration, scientific layout, compact and orderly, unified management and coordination from the perspective of the park, make the production park have vitality and strong product competitiveness.
附图说明Description of drawings
图1是本实用新型工艺系统流程图。Fig. 1 is the process flow chart of the utility model process system.
具体实施方式detailed description
下面结合附图对本实用新型进一步说明。Below in conjunction with accompanying drawing, the utility model is further described.
如图1所示，本实用新型包括原料制备系统、竖炉直接还原系统、煤气加热系统、煤粉熔分系统、铁水预处理系统和石灰煅烧系统，所述原料制备系统和煤气加热系统分别将原料和还原气体送至竖炉直接还原系统，从竖炉还原系统出来的直接还原铁进入煤粉熔分系统进行铁水铁渣分离，从竖炉还原系统出来的炉顶煤气进入煤气加热系统和石灰煅烧系统，经煤粉熔分系统分离的含钛铁水进入铁水预处理系统，在石灰煅烧系统的配合下生成铸造铁水。As shown in Figure 1, the utility model includes a raw material preparation system, a shaft furnace direct reduction system, a gas heating system, a pulverized coal melting system, a molten iron pretreatment system and a lime calcination system, and the raw material preparation system and the gas heating system respectively The raw materials and reducing gas are sent to the direct reduction system of the shaft furnace. The direct reduced iron from the reduction system of the shaft furnace enters the pulverized coal melting system for separation of molten iron and iron slag. The top gas from the reduction system of the shaft furnace enters the gas heating system and lime In the calcination system, the titanium-containing molten iron separated by the pulverized coal melting system enters the molten iron pretreatment system, and generates casting molten iron with the cooperation of the lime calcination system.
钒钛磁铁矿的冶炼，其基本原理就是利用还原物料将铁从矿石中还原出来，而还原物料大多使用焦炭。在攀西地区，煤矿资源也相当丰富，而焦化厂生产焦炭所产生的焦炉煤气利用率较低，直接排放又会造成环境污染，由于焦炉煤气中含有25％左右的CH4，可利用焦炉煤气作为还原物料来还原钒钛磁铁矿，而CH4的还原能力远远低于CO和H2，所以焦炉煤气进入竖炉系统前，需要将焦炉煤气中的CH4转换成CO和H2。将炉顶煤气通入煤气加热系统后，在高温条件下，焦炉煤气中的CH4和炉顶煤气中的CO2和H2O发生转换反应，生成CO和H2，反应方程式如下：CH4+CO2＝2CO+2H2，CH4+H2O＝CO+3H2。这是利用炉顶煤气的第一处，另一处是在石灰煅烧系统中，由于竖炉炉顶煤气热值高，可以达到1840kcal，利用竖炉炉顶煤气煅烧石灰石可以达到较高的煅烧温度，石灰石分解彻底，生石灰质量好，而生石灰是铁水预处理系统中用于降低铁水中S含量的重要原料。本实用新型将各生产系统整合后，竖炉炉顶煤气得到了充分利用，大大节约了生产成本，避免了资源浪费。The basic principle of smelting vanadium-titanium magnetite is to use reducing materials to reduce iron from ore, and most of the reducing materials use coke. In the Panxi region, coal resources are also quite abundant, but the utilization rate of coke oven gas produced by coking plants is low, and direct discharge will cause environmental pollution. Since coke oven gas contains about 25% CH4, coke can be used Furnace gas is used as a reducing material to reduce vanadium-titanium magnetite, and the reducing ability of CH4 is much lower than that of CO and H2. Therefore, before coke oven gas enters the shaft furnace system, CH4 in coke oven gas needs to be converted into CO and H2. After the top gas is fed into the gas heating system, under high temperature conditions, the CH4 in the coke oven gas and the CO2 and H2O in the top gas undergo conversion reactions to generate CO and H2. The reaction equation is as follows: CH4+CO2=2CO+ 2H2, CH4+H2O=CO+3H2. This is the first place where the furnace top gas is used, and the other is in the lime calcination system. Due to the high calorific value of the shaft furnace top gas, it can reach 1840kcal. Using the shaft furnace top gas to calcinate limestone can reach a higher calcination temperature , The limestone is completely decomposed, and the quicklime is of good quality, and the quicklime is an important raw material for reducing the S content in the molten iron pretreatment system. After the utility model integrates various production systems, the top gas of the shaft furnace is fully utilized, greatly saving production costs and avoiding waste of resources.
所述原料制备系统包括研磨磁选机、混料机、压球机和烘干机，其中混料机将经研磨磁选机筛选的钒钛精矿粉粒与煤粉和粘接剂混匀后送压球机压制成球团，然后将球团送入烘干机烘干成炼铁原料。刚压制的球团强度较低，需要经过烘干，烘干温度为200℃左右，烘干后的球团强度大幅度提高，可以直接用于竖炉直接还原。The raw material preparation system includes a grinding magnetic separator, a mixer, a ball press and a dryer, wherein the mixer mixes the vanadium-titanium concentrate powder screened by the grinding magnetic separator with coal powder and binder Afterwards, the briquetting machine is pressed into pellets, and then the pellets are sent to the dryer to be dried into iron-making raw materials. The freshly pressed pellets have low strength and need to be dried. The drying temperature is about 200°C. The strength of the dried pellets is greatly improved and can be directly used for direct reduction in the shaft furnace.
所述竖炉直接还原系统包括原料准备装置、受料装置、竖炉本体和出料装置，所述原料准备装置将原料进行筛分，合格原料通过受料装置送至竖炉本体顶部，经过还原后的直接还原铁由出料装置送至粉煤熔分系统。烘干后的球团通过胶带机运输至球团储料仓进行堆存，为保证还原竖炉的正常运行，储料仓有效储存时间为4h，通过振动筛分机进行给料筛分，筛下物(粉料)通过返料胶带机运输至粉料仓由汽车运输返回配料；合格原料(筛上物)通过胶带机运输至竖炉高位提升机，通过高位提升机运输至球团受料装置进行受料。竖炉本体用于将冷固结球团还原成直接还原铁。The shaft furnace direct reduction system includes a raw material preparation device, a material receiving device, a shaft furnace body and a discharging device. The final direct reduced iron is sent to the pulverized coal melting system by the discharge device. The dried pellets are transported to the pellet storage bin by a belt conveyor for storage. In order to ensure the normal operation of the reduction shaft furnace, the effective storage time of the storage bin is 4 hours. The material (powder) is transported to the powder silo through the return belt conveyor and returned to the batching by car; the qualified raw material (screened material) is transported to the high-level hoist of the shaft furnace through the belt conveyor, and then transported to the pellet receiving device through the high-level hoist Receive materials. The shaft furnace body is used to reduce cold consolidated pellets to direct reduced iron.
进一步的是，所述竖炉本体为气基式还原竖炉，还原气体由煤气加热系统提供，从竖炉本体顶部出来的炉顶煤气送至煤气加热系统对焦炉煤气进行加热还原生成还原气体。Further, the shaft furnace body is a gas-based reducing shaft furnace, and the reducing gas is provided by the gas heating system, and the top gas coming out of the top of the shaft furnace body is sent to the gas heating system for heating and reducing the coke oven gas to generate reducing gas .
所述煤气加热系统包括三座球式加热炉，其中两座球式加热炉接收竖炉直接还原系统出来的炉顶煤气，待炉顶煤气与焦炉煤气反应生成还原气体后通入第三座球式加热炉加热后送至竖炉直接还原系统。采用两烧一送的煤气加热系统，能够保证充分将焦炉煤气中的CH4转换成CO和H2，并且将还原气体加热到1050℃左右，这样可使球团金属转化率达到90％以上。The gas heating system includes three spherical heating furnaces, two of which receive the top gas from the direct reduction system of the shaft furnace, and pass into the third furnace after the top gas reacts with the coke oven gas to generate reducing gas. After being heated in the spherical heating furnace, it is sent to the direct reduction system of the shaft furnace. The gas heating system with two combustions and one delivery can ensure that the CH4 in the coke oven gas is fully converted into CO and H2, and the reducing gas is heated to about 1050°C, so that the metal conversion rate of the pellets can reach more than 90%.
所述煤粉熔分系统包括煤粉熔分炉，经竖炉直接还原系统还原后的高温金属化球团通过溜槽输送到煤粉熔分炉炉顶的进料口送入炉内，煤粉通过安装在炉体上的喷枪喷入炉内。煤粉熔分炉是将直接还原铁高温熔分，实现渣铁分离，直接还原铁排入煤粉熔分炉的温度为900℃左右，由于钒钛磁铁矿炉渣熔点较高，一般需要达到1600℃左右。煤粉与高温空气在熔分炉内高温快速燃烧，理论燃烧温度可以达到2000℃以上，直接还原铁与高温烟气进行对流和辐射强烈热交换，直接还原铁可快速熔分形成炉渣和铁水。The pulverized coal melting system includes a pulverized coal melting furnace, and the high-temperature metallized pellets reduced by the shaft furnace direct reduction system are transported to the feed port of the pulverized coal melting furnace roof through the chute, and the pulverized coal is fed into the furnace. Spray into the furnace through the spray gun installed on the furnace body. The pulverized coal melting furnace melts the direct reduced iron at high temperature to realize the separation of slag and iron. The temperature at which the direct reduced iron is discharged into the pulverized coal melting furnace is about 900°C. Due to the high melting point of vanadium-titanium magnetite slag, it generally needs to reach Around 1600°C. The pulverized coal and high-temperature air burn quickly at high temperature in the melting furnace, and the theoretical combustion temperature can reach above 2000°C. The DRI and the high-temperature flue gas undergo intense heat exchange by convection and radiation, and the DRI can be rapidly melted to form slag and molten iron.
所述石灰煅烧系统在炉顶煤气的煅烧下产生生石灰，生石灰进入铁水预处理系统通过生石灰脱硫工艺对铁水进行预处理，使铁水达到铸造生铁标准。由于直接还原铁熔分过程中，没有进行造渣，所以得到的生铁中S含量较高。铁水预处理就是将熔分炉冶炼得到的铁水中的S含量降低到铸造生铁标准。本实用新型采用常规的生石灰脱硫法对铁水进行预处理，所需生石灰由石灰煅烧系统产生，而煅烧所需的热量由炉顶煤气提供。The lime calcination system produces quicklime under the calcination of furnace top gas, and the quicklime enters the molten iron pretreatment system to pretreat the molten iron through the quicklime desulfurization process, so that the molten iron reaches the casting pig iron standard. Since there is no slagging in the direct reduced iron melting process, the S content in the obtained pig iron is relatively high. Hot metal pretreatment is to reduce the S content in the hot metal obtained by smelting in the melting furnace to the standard of foundry pig iron. The utility model adopts the conventional quicklime desulfurization method to pretreat molten iron, the required quicklime is produced by a lime calcination system, and the heat required for calcination is provided by furnace top gas.
本实用新型通过将原料制备系统、竖炉直接还原系统、煤气加热系统、煤粉熔分系统、铁水预处理系统和石灰煅烧系统等多个冶炼系统整合到一个生产园区，一体化的生产可缩短物料输送路径，竖炉直接还原系统的炉顶煤气可作为供热源为其它系统提供热能，从而提高了资源利用率，节能环保效果显著，此外，对于铸铁生产，可做到专业化协作，科学布局，紧凑有序，从园区角度上统一管理和协调，使生产园区具有活力和较强的产品竞争性。The utility model integrates multiple smelting systems such as raw material preparation system, shaft furnace direct reduction system, gas heating system, pulverized coal melting system, molten iron pretreatment system and lime calcination system into one production park, and the integrated production can shorten The material conveying path, the top gas of the direct reduction system of the shaft furnace can be used as a heat source to provide heat energy for other systems, thereby improving the utilization rate of resources, and the effect of energy saving and environmental protection is remarkable. In addition, for cast iron production, it can achieve professional cooperation and scientific The layout is compact and orderly, and unified management and coordination from the perspective of the park make the production park have vitality and strong product competitiveness.
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| CN108359763A (en) * | 2018-02-23 | 2018-08-03 | 攀枝花正德环保新材料科技开发有限公司 | Vanadium titano-magnetite process equipment and processing technology |
| CN108359762A (en) * | 2018-02-23 | 2018-08-03 | 攀枝花正德环保新材料科技开发有限公司 | Vanadium-titanium magnetite reduction device and vanadium titano-magnetite processing unit (plant) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108359763A (en) * | 2018-02-23 | 2018-08-03 | 攀枝花正德环保新材料科技开发有限公司 | Vanadium titano-magnetite process equipment and processing technology |
| CN108359762A (en) * | 2018-02-23 | 2018-08-03 | 攀枝花正德环保新材料科技开发有限公司 | Vanadium-titanium magnetite reduction device and vanadium titano-magnetite processing unit (plant) |
| CN108359763B (en) * | 2018-02-23 | 2019-10-22 | 攀枝花正德环保新材料科技开发有限公司 | Vanadium titano-magnetite process equipment and processing technology |
| CN108359762B (en) * | 2018-02-23 | 2019-10-22 | 攀枝花正德环保新材料科技开发有限公司 | Vanadium-titanium magnetite reduction device and vanadium titano-magnetite processing unit (plant) |
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