WO2014131324A1 - 一种井下煤矸分离输送充填方法及设备 - Google Patents

一种井下煤矸分离输送充填方法及设备 Download PDF

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Publication number
WO2014131324A1
WO2014131324A1 PCT/CN2014/071055 CN2014071055W WO2014131324A1 WO 2014131324 A1 WO2014131324 A1 WO 2014131324A1 CN 2014071055 W CN2014071055 W CN 2014071055W WO 2014131324 A1 WO2014131324 A1 WO 2014131324A1
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Prior art keywords
coal
crushing
material injector
sorting machine
underground
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PCT/CN2014/071055
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English (en)
French (fr)
Inventor
杜长龙
郑克洪
李建平
杨道龙
罗晨旭
江红祥
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中国矿业大学
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Application filed by 中国矿业大学 filed Critical 中国矿业大学
Priority to DE112014000131.7T priority Critical patent/DE112014000131T5/de
Priority to AU2014223133A priority patent/AU2014223133B2/en
Publication of WO2014131324A1 publication Critical patent/WO2014131324A1/zh
Priority to ZA2014/09236A priority patent/ZA201409236B/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00Disintegrating plant with or without drying of the material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/20Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00General arrangement of separating plant, e.g. flow sheets
    • B03B9/005General arrangement of separating plant, e.g. flow sheets specially adapted for coal
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F13/00Transport specially adapted to underground conditions
    • E21F13/002Crushing devices specifically for conveying in mines
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00Methods or devices for placing filling-up materials in underground workings
    • E21F15/08Filling-up hydraulically or pneumatically

Definitions

  • the invention relates to a method and a device for separating and conveying coal seams in underground coal, and is particularly suitable for the separation and transportation of coal and vermiculite in underground mines.
  • Hand selection Manually picking the meteorite from the belt conveyor by hand, the working conditions are difficult, the efficiency is low, and the mis-election and the leakage are severe.
  • Wind selection Using coal and meteorite density, the coal and vermiculite are separated by the buoyancy of the wind. It is suitable for areas with poor water resources, but the equipment investment is large, the floor space is large, the dust treatment equipment is large, and the treatment effect is not ideal. Suitable for underground use.
  • Water selection The difference between the density of coal and vermiculite is used to separate coal and vermiculite by liquid buoyancy.
  • Gamma ray sorting gamma ray is used to identify coal and vermiculite. Different gamma rays are used to generate different electrical signals according to the attenuation of coal and vermiculite. The feedback mechanism of the electric signal controls the actuator to change the trajectory of the meteorite.
  • the coal hydrazine separation is realized, but the system is complicated, the sorting ability is small, and the radiation source of the radiation source is hidden.
  • the raw coal on the site often contains water or slime, so that the surface of the coal gangue is covered by the slime, which makes the identification difficult.
  • the object of the present invention is to overcome the deficiencies in the prior art and to provide a method and apparatus for separating and transporting coal mines.
  • the method for separating and conveying the underground coal gangue of the present invention is:
  • the mined coal and vermiculite are subjected to preliminary crushing and sorting under the well by a roller crushing and sorting machine;
  • the coal block with a particle size of less than 50 mm sorted by the roller crushing and sorting machine is sent to the pneumatic conveying system, and the coal block and the vermiculite with a particle size of 50 mm or more are subjected to secondary crushing and sorting by a hammer crushing and sorting machine;
  • the coal block with a particle size of less than 50 mm sorted by the hammer crushing sorting machine is sent to the pneumatic conveying system, and is transported to the underground coal bunker together with the coal piece with a particle size of less than 50 mm sorted by the roll crushing and sorting machine.
  • the vermiculite having a particle size of 50 mm or more is broken into a piece of vermiculite having a particle size of 30 mm or less by a roll crusher;
  • meteorite fragments with a particle size of 30 mm or less are transported to the underground goaf through the pneumatic conveying system, and then the ore is mined. Pneumatic filling with a wet spray machine.
  • the underground coal slag separation conveying and filling equipment of the invention comprises a pneumatic conveying system, a pair of roller crushing sorting machine, a hammer crushing sorting machine, a pair of roller crusher and a mining wet spray machine, wherein the pneumatic conveying filling system comprises a fan and a minute a wind eliminator 1, a material ejector 1, a distributor 2, a material ejector 2, a material ejector 3, the material ejector 1 and the material ejector 3 respectively comprise an air inlet, a feed inlet and a mixture outlet
  • the material injector 2 includes an air inlet, two inlets and a mixture outlet, and the air distributor 1 and the air distributor 2 respectively have an air inlet and two air outlets;
  • the fine raw material outlet of the pair of roll crushing and sorting machine is connected to the feed port of the material injector 1 , and the raw material outlet of the roll crushing and sorting machine is connected to the inlet of the hammer crushing and sorting machine, and the hammer crushing and sorting machine
  • the raw material outlet is connected to one feed port of the material injector 2
  • the crude material outlet of the hammer crusher is connected to the feed port of the roll crusher
  • the discharge port of the roll crusher is connected with the material injector 3 Feed opening
  • the fan is connected to the air inlet of the air distributor, and the two air outlets of the air distributor one are respectively connected to the air inlet of the material injector 1 and the air inlet of the air distributor 2, and the mixture material outlet of the material injector 1 is connected to the material injection.
  • Another feed port of the second device, the mixture outlet of the material injector 2 is connected to the underground coal bunker, and the two air outlets of the splitter 2 are respectively the air inlet of the material injector 2 and the material injector 3, and the material injector 3
  • the mixture feed outlet is connected to a mining wet spray machine.
  • the method and equipment for separating and transporting underground coal gangue according to the present invention according to the actual working conditions of the underground, the coal slag sorting system and the pneumatic conveying filling system are organically combined, and the coal and vermiculite are removed by the coal gang crushing and sorting system.
  • the crushing and sorting is carried out directly under the well, and the selected coal pieces are directly sent to the underground coal bunker by the pneumatic conveying and filling system, and the crushed vermiculite is sent to the goaf for filling operation.
  • Figure 1 is a view showing the overall structure of the present invention
  • Figure 2 is a structural view of the pneumatic conveying system of the present invention.
  • the method for separating and conveying the underground coal gangue of the present invention comprises the following steps:
  • the coal block with a particle size of less than 50 mm selected by the hammer crushing and sorting machine 4 in step b is sent to the pneumatic conveying system 1, and the particle size selected by the roller crushing and sorting machine 2 in step a is less than 50 mm.
  • the coal block is transported together to the underground coal bunker, and the vermiculite having a particle size of 50 mm or more is broken into the vermiculite pieces having a particle size of 30 mm or less by the roll crusher 6;
  • the vermiculite fragments having a particle size of 30 mm or less which are crushed into the roller crusher 6 in the step c are transported to the underground gob through the pneumatic conveying system 1, and then pneumatically filled by the mining wet spray machine 7.
  • the downhole coal slag separation conveying and filling equipment of the present invention comprises a pneumatic conveying system 1, a roll crushing and sorting machine 2, a hammer crushing and sorting machine 4, a roll crusher and a mine wet spray machine.
  • the pneumatic conveying and filling system 1 includes a fan 11, a distributor 12, a material injector 13, a distributor 2, a material injector 2, and a material injector 3.
  • the material ejector unit 13 and the material ejector unit 17 17 respectively include an air inlet, a feed port and a mixture material outlet; the material ejector unit 16 includes an air inlet, two inlet ports and a mixture material outlet.
  • the splitter 12 and the splitter 2 15 respectively have an air inlet and two air outlets.
  • the fine material outlet of the roll crushing and sorting machine 2 is connected to the feed port of the material injector 13 , and the raw material outlet of the roll crushing and sorting machine 2 is connected to the feed port of the hammer crushing and sorting machine 4 through the belt conveyor 3 .
  • the fine material outlet of the hammer crusher 4 is connected to a feed port of the material injector 2, and the raw material outlet of the hammer crusher 4 is connected to the feed port of the roll crusher 6 through the guide tank 5.
  • the feed port of the material injector 3 17 is connected to the discharge port of the roller crusher 6.
  • the fan 11 is connected to the air inlet of the air separator 12, and the two air outlets of the air distributor 12 are respectively connected to the air inlet of the material injector 13 and the air inlet of the air separator 2, and the mixture of the material injectors 13
  • the outlet is connected to another feed port of the material injector 2 through the pneumatic conveying pipe 14
  • the mixture outlet of the material injector 2 16 is connected to the underground coal bunker
  • the two air outlets of the splitter 2 15 are respectively material injectors 16
  • the air inlet of the material injector three 17, the mixture material outlet of the material injector three 17 is connected to the mine wet spray machine 7 through the pneumatic conveying pipe two 18.
  • the overall height of the underground coal shovel separation and conveying equipment does not exceed 3 meters, wherein: the maximum feed size of the roll crushing and sorting machine 2 is 300 mm, the discharge granularity is 50 to 100 mm, and the sieve box has a granularity. It is 50 mm and has a processing capacity of 250 to 500 tons per hour.
  • the hammer crusher 4 has a maximum feed size of 150 mm, a discharge size of 0 to 100 mm, a screen size of 50 mm, and a processing capacity of 200 to 400 tons per hour.
  • the maximum feed size of the roll crusher 6 is 150 mm, the discharge size is 0 to 30 mm, and the processing capacity is 150 to 350 tons per hour.
  • the conveying capacity of the belt conveyor 3 is 260 tons per hour, the conveying granularity is 0 to 100 mm, the horizontal length of the inclined section is 7.7 m, the overall height of the conveyor is 2. 7 m, and the belt is made of flame retardant tape. 5 MPa,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
  • the pipe diameter is 150 mm
  • the conveying capacity is 70 to 80 cubic meters per hour, and the maximum conveying distance is 300 meters
  • the wind pressure of the pneumatic conveying pipe 2 18 is 0.4 MPa
  • the pipe diameter is 100 mm
  • the conveying amount is 30 ⁇ 35 cubic meters per hour

Abstract

一种井下煤矸分离输送充填方法及设备,通过对辊破碎分选机(2)和锤式破碎分选机(4)将煤和矸石直接在井下进行两次破碎分选,由气力输送系统(1)将分选出的煤块直接送入井下煤仓,通过对辊破碎机(6)将分选出的矸石破碎成矸石碎块,并将破碎后的矸石送至采空区进行充填作业。该设备不仅解决了井下煤和矸石的运输问题,节约井下空间,并为井下采空区充填提供大量原料,避免地表塌陷、矸石山堆积等问题。

Description

一种井下煤矸分离输送充填方法及设备 技术领域
本发明涉及井下煤矸分离输送充填方法及设备, 尤其适用于矿山井下块煤与矸石的 分选及输送。
背景技术
目前采用的煤与煤矸石的分离分选方法主要有手选、 风选、 水选、 伽马射线分选等。 手选: 通过人工用手从带式输送机上挑拣矸石, 工作条件艰苦、 效率低, 误选、 漏选严 重。 风选: 利用煤和矸石密度不同, 靠风的浮力分离出煤和矸石, 适用于水资源贫乏的 地区, 但设备投资大, 占地面积大, 灰尘处理设备较大, 处理效果不理想, 不适合井下 使用。 水选: 利用煤与矸石的密度不同, 靠液体浮力分离煤与矸石, 分选效果好, 但设 备昂贵, 工艺复杂, 在井下实现较困难。 伽马射线分选: 采用伽玛射线识别煤和矸石, 根据伽马射线在煤和矸石中的衰减量不同产生不同的电信号, 通过电信号的反馈控制执 行机构, 改变矸石的运动轨迹, 从而实现煤矸分离, 但系统复杂, 分选能力小, 放射源 的辐射隐患, 现场的原煤中经常含有水或者煤泥, 使煤块矸石表面被煤泥遮住, 造成识 别上的困难。
实现井下原煤直接分选并充填采空区,是解决矸石占用耕地和环境污染的最佳方法, 也是提高煤矿经济效益和社会效益的有效措施, 同时也是解决井下充填材料的有效途径。 特别是在当今强调实行循环经济, 推行可持续发展战略的形势下, 研究和推广应用矸石 不出井的洁净煤生产技术是解决矸石危害的重要发展方向, 不仅可以改善生态环境, 而 且具有广阔的市场应用前景与工程实际意义。 因此, 在井下直接进行煤矸分选是当前急 需解决的一个问题。
发明内容
发明目的: 本发明的目的是克服已有技术中的不足之处, 提供一种井下煤矸分离输 送充填方法及设备。
本发明的井下煤矸分离输送充填方法是:
a、 将开采出的煤与矸石在井下通过对辊破碎分选机进行初步破碎分选;
b、将对辊破碎分选机分选出的粒度小于 50mm的煤块送入气力输送系统,粒度为 50mm 以上的煤块与矸石通过锤式破碎分选机进行二次破碎分选;
c、 将锤式破碎分选机分选出的粒度小于 50mm的煤块送入气力输送系统, 并与对辊 破碎分选机分选出的粒度小于 50mm的煤块一起输送至井下煤仓, 粒度为 50mm以上的矸 石通过对辊破碎机破碎成粒度为 30mm以下的矸石碎块;
d、 将粒度为 30mm以下的矸石碎块通过气力输送系统输送至井下采空区, 然后经矿 用湿喷机进行气力充填。
本发明的井下煤矸分离输送充填设备包括气力输送系统、 对辊破碎分选机、 锤式破 碎分选机、 对辊破碎机和矿用湿喷机, 所述气力输送充填系统包括风机、 分风器一、 物 料喷射器一、 分风器二、 物料喷射器二、 物料喷射器三, 所述物料喷射器一和物料喷射 器三分别含有一个进风口、 一个进料口和一个混合物料出口, 物料喷射器二含有一个进 风口、 二个进料口和一个混合物料出口, 所述分风器一和分风器二分别含有一个进风口 和两个出风口;
所述对辊破碎分选机的细原料出口连接物料喷射器一的进料口, 对辊破碎分选机的 粗原料出口连接锤式破碎分选机的进料口, 锤式破碎分选机的细原料出口连接物料喷射 器二的一个进料口, 锤式破碎分选机的粗原料出口连接对辊破碎机的进料口, 对辊破碎 机的出料口连接物料喷射器三的进料口;
所述风机连接分风器一的进风口, 分风器一的两个出风口分别连接物料喷射器一的 进风口和分风器二的进风口, 物料喷射器一的混合物料出口连接物料喷射器二的另一个 进料口, 物料喷射器二的混合物料出口连接井下煤仓, 分风器二的两个出风口分别物料 喷射器二和物料喷射器三的进风口, 物料喷射器三的混合物料出口连接矿用湿喷机。
有益效果: 本发明的井下煤矸分离输送充填方法及设备, 根据井下的实际工况, 将 煤矸分选系统和气力输送充填系统有机结合在一起, 通过煤矸破碎分选系统将煤和矸石 直接在井下进行破碎分选, 再由气力输送充填系统将分选出的煤块直接送入井下煤仓, 并将破碎后的矸石送至采空区进行充填作业。 不仅解决了井下煤和矸石的运输问题, 节 约井下空间, 并为井下采空区充填提供大量原料, 避免地表塌陷、 矸石山堆积等问题, 符合绿色采煤、 绿色生产的要求。 该方法构思巧妙、 结构合理, 其设备简单, 占用井下 空间小, 尤其是采用气力输送充填系统, 改变了井下运输格局, 提高了井下空间的使用 率, 而且煤矸分选设备分离效果好, 在本领域内具有广泛的实用性和较强的创新性。 附图说明
图 1是本发明的整体结构示图;
图 2是本发明的气力输送系统结构示图。
图中: 1、 气力输送充填系统, 2、 对辊破碎分选机, 3、 皮带输送机, 4、 锤式破碎 分选机, 5、 导料槽, 6、 对辊破碎机, 7、 矿用湿喷机, 11、 风机, 12、 分风器一, 13、 物料喷射器一, 14、 气力输送管一, 15、 分风器二, 16、 物料喷射器二, 17、 物料喷射 器三, 18、 气力输送管二。
具体实施方式:
下面结合附图对本发明做更进一步的解释。 本发明的井下煤矸分离输送充填方法包括以下步骤:
a、 将开采出的煤与矸石在井下通过对辊破碎分选机 2进行初步破碎分选; b、将步骤 a中对辊破碎分选机 2分选出的粒度小于 50mm的煤块送入气力输送系统 1, 粒度为 50mm以上的煤块与矸石通过锤式破碎分选机 4进行二次破碎分选;
c、将步骤 b中锤式破碎分选机 4分选出的粒度小于 50mm的煤块送入气力输送系统 1, 并与步骤 a中对辊破碎分选机 2分选出的粒度小于 50mm的煤块一起输送至井下煤仓,粒 度为 50mm以上的矸石通过对辊破碎机 6破碎成粒度为 30mm以下的矸石碎块;
d、 将步骤 c中对辊破碎机 6破碎成的粒度为 30mm以下的矸石碎块通过气力输送系 统 1输送至井下采空区, 然后经矿用湿喷机 7进行气力充填。
如图 1和 2所示, 本发明的井下煤矸分离输送充填设备包括气力输送系统 1、 对辊 破碎分选机 2、 锤式破碎分选机 4、 对辊破碎机和矿用湿喷机 7。 气力输送充填系统 1包 括风机 11、 分风器一 12、 物料喷射器一 13、 分风器二 15、 物料喷射器二 16、 物料喷射 器三 17。 物料喷射器一 13和物料喷射器三 17分别含有一个进风口、 一个进料口和一个 混合物料出口; 物料喷射器二 16含有一个进风口、 二个进料口和一个混合物料出口。 分 风器一 12和分风器二 15分别含有一个进风口和两个出风口。
对辊破碎分选机 2的细原料出口连接物料喷射器一 13的进料口, 对辊破碎分选机 2 的粗原料出口通过皮带输送机 3连接锤式破碎分选机 4的进料口, 锤式破碎分选机 4的 细原料出口连接物料喷射器二 16的一个进料口,锤式破碎分选机 4的粗原料出口通过导 料槽 5连接对辊破碎机 6的进料口,对辊破碎机 6的出料口连接物料喷射器三 17的进料 Π。
风机 11连接分风器一 12的进风口,分风器一 12的两个出风口分别连接物料喷射器 一 13的进风口和分风器二 15的进风口,物料喷射器一 13的混合物料出口通过气力输送 管一 14连接物料喷射器二 16的另一个进料口,物料喷射器二 16的混合物料出口连接井 下煤仓, 分风器二 15的两个出风口分别物料喷射器二 16和物料喷射器三 17的进风口, 物料喷射器三 17的混合物料出口通过气力输送管二 18连接矿用湿喷机 7。
本实施例中, 井下煤矸分离输送设备的总体高度不超过 3米, 其中: 对辊破碎分选 机 2的最大入料粒度为 300毫米, 出料粒度为 50〜100毫米, 筛箱分级粒度为 50毫米, 处理能力为 250〜500吨每小时。锤式破碎分选机 4的最大入料粒度为 150毫米, 出料粒 度为 0〜100毫米, 筛箱分级粒度 50毫米, 处理能力为 200〜400吨每小时。 对辊破碎机 6的最大入料粒度为 150毫米, 出料粒度为 0〜30毫米, 处理能力 150〜350吨每小时。 皮带输送机 3的输送量为 260吨每小时, 输送粒度为 0〜100毫米, 倾斜段水平长度 7. 7 米, 输送机整体高度 2. 7米, 皮带用阻燃胶带。气力输送充填系统 1的气流压力为 0. 4〜 0. 5兆帕,耗风量为 250〜300 立方米每小时,其中:气力输送管一 14的风压为 0. 5兆帕, 管径为 150毫米, 输送量为 70〜80立方米每小时, 输送最大距离为 300米; 气力输送管 二 18的风压为 0. 4兆帕, 管径为 100毫米, 输送量为 30〜35立方米每小时, 输送最大 距离为 500米。气力输送充填系统 1的整体输送距离为 100〜300米, 超过 300米距离需 添加增压补风装置。
以上所述仅是本发明的优选实施方式, 应当指出, 对于本技术领域的普通技术人员 来说, 在不脱离本发明原理的前提下, 还可以做出若干改进和润饰, 这些改进和润饰也 应视为本发明的保护范围。

Claims

权利要求书
1、 一种井下煤矸分离输送充填方法, 其特征在于包括以下步骤:
a、 将开采出的煤与矸石在井下通过对辊破碎分选机 (2) 进行初步破碎分选; b、 将对辊破碎分选机 (2) 分选出的粒度小于 50mm 的煤块送入气力输送系统 (1), 粒度为 50mm以上的煤块与矸石通过锤式破碎分选机 (4) 进行二次破碎分选;
c、 将锤式破碎分选机 (4) 分选出的粒度小于 50mm 的煤块送入气力输送系统 (1), 并与对辊破碎分选机 (2) 分选出的粒度小于 50mm 的煤块一起输送至井下煤仓, 粒度为 50mm以上的矸石通过对辊破碎机 (6) 破碎成粒度为 30mm以下的矸石碎块;
d、 将粒度为 30mm 以下的矸石碎块通过气力输送系统 (1) 输送至井下采空区, 然后 经矿用湿喷机 (7) 进行气力充填。
2、 一种井下煤矸分离输送充填设备, 其特征在于: 包括气力输送系统 (1)、 对辊破 碎分选机 (2)、 锤式破碎分选机 (4)、 对辊破碎机 (6) 和矿用湿喷机 (7), 所述气力输 送充填系统 (1) 包括风机 (11)、 分风器一 (12)、 物料喷射器一 (13)、 分风器二
(15)、 物料喷射器二 (16)、 物料喷射器三 (17), 所述物料喷射器一 (13) 和物料喷射 器三 (17) 分别含有一个进风口、 一个进料口和一个混合物料出口, 物料喷射器二
(16) 含有一个进风口、 二个进料口和一个混合物料出口, 所述分风器一 (12) 和分风 器二 (15) 分别含有一个进风口和两个出风口;
所述对辊破碎分选机 (2) 的细原料出口连接物料喷射器一 (13) 的进料口, 对辊破 碎分选机 (2) 的粗原料出口连接锤式破碎分选机 (4) 的进料口, 锤式破碎分选机 (4) 的细原料出口连接物料喷射器二 (16) 的一个进料口, 锤式破碎分选机 (4) 的粗原料出 口连接对辊破碎机 (6) 的进料口, 对辊破碎机 (6) 的出料口连接物料喷射器三 (17) 的进料口;
所述风机 (11) 连接分风器一 (12) 的进风口, 分风器一 (12) 的两个出风口分别 连接物料喷射器一 (13) 的进风口和分风器二 (15) 的进风口, 物料喷射器一 (13) 的 混合物料出口连接物料喷射器二 (16) 的另一个进料口, 物料喷射器二 (16) 的混合物 料出口连接井下煤仓, 分风器二 (15) 的两个出风口分别物料喷射器二 (16) 和物料喷 射器三 (17) 的进风口, 物料喷射器三 (17) 的混合物料出口连接矿用湿喷机 (7)。
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