WO2014023180A1 - 井下跳汰排矸的方法 - Google Patents

井下跳汰排矸的方法 Download PDF

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Publication number
WO2014023180A1
WO2014023180A1 PCT/CN2013/080623 CN2013080623W WO2014023180A1 WO 2014023180 A1 WO2014023180 A1 WO 2014023180A1 CN 2013080623 W CN2013080623 W CN 2013080623W WO 2014023180 A1 WO2014023180 A1 WO 2014023180A1
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Prior art keywords
coal
sieve
raw coal
belt
raw
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PCT/CN2013/080623
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English (en)
French (fr)
Inventor
符东旭
曹剑锋
霍红涛
李海涛
杨军辉
邢韬
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冀中能源股份有限公司
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Publication of WO2014023180A1 publication Critical patent/WO2014023180A1/zh

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    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00Solid fuels
    • C10L5/02Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/04Raw material of mineral origin to be used; Pretreatment thereof
    • 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
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00Solid fuels
    • C10L5/40Solid fuels essentially based on materials of non-mineral origin
    • C10L5/46Solid fuels essentially based on materials of non-mineral origin on sewage, house, or town refuse
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L9/00Treating solid fuels to improve their combustion
    • C10L9/02Treating solid fuels to improve their combustion by chemical means
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/10Biofuels, e.g. bio-diesel
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel

Definitions

  • the invention belongs to the technical field of coal processing, and in particular relates to a method for squatting and smashing in a well. Background technique
  • Step 1 Preparation of raw coal; after the wool is sieved by the screening device, the raw coal on the sieve is sent to the shovel jig, and the coal at the bottom of the sieve is sent to the coal hopper;
  • Step 2 Washing the raw coal; the lump coal and vermiculite separated from the raw coal sent to the skimming jig are dehydrated and transported by the shaped double-row bucket elevator, and the lump coal is sent to the lump belt and transported to the coal bunker. , the meteorite is transported to the rock warehouse by a meteorite belt;
  • Step 3 Treatment of slime water; the washing water from the jig and the double-row bucket elevator overflows to the concentrated water tank; wherein the overflow in the concentrated water tank flows to the circulating water tank; the underflow in the concentrated water tank passes After the treatment of the slime water treatment device, the slime and the filtrate are separated, and the slime is sent to the lump coal belt and transported to the coal bunker. The filtrate flows from the circulating water tank to the recirculating jig for recycling.
  • the screening device comprises a tweezers, a pendulum screen and a scraper sieving machine;
  • the specific process of preparing the raw coal comprises: the raw coal enters the raft through the conveyor belt, and the raw coal on the scorpion enters the sifter sieving machine through the raw coal bulk belt
  • the crusher is crushed, and the crushed raw coal falls into the scraper sieving machine; the raw coal passing through the scorpion falls into the pendulum shaft sieve; the coal passes through the pendulum shaft sieve and falls into the final coal bunker, and the pendulum shaft sieve
  • the raw coal on the inlet enters the scraper screening machine;
  • the raw coal falling into the scraper sieving machine is further sieved, and the sifted coal is sent to the last coal bunker through the lower scraper of the scraper sieving machine, and the raw coal on the upper scraper of the sifter sieving machine is sent into the platoon through the machine head. ⁇ Jig machine.
  • the sieve of the tweezers is 75mm; the width of the large belt is 800mm.
  • the crushed coal has a raw coal size of 25 to 150 mm and a raw coal size of 150 mm.
  • the raw coal falling into the scraper screen from the pendulum screen is 25-150 mm.
  • the scraper sieving machine comprises 6 sifting screens, and the raw coal falling into the squeegee sieving machine is sent to the final coal bunker and the shovel jig through the 6-segment screening, and the sieve joint of the pendulum shaft sieve and 6
  • the screen sieves are all 25 mm.
  • step 2 the width of the lump coal belt and the width of the vermiculite belt are both 650 mm.
  • the raw coal fed into the shovel jig is 25-150mm.
  • the slime water treatment device comprises a high frequency sieve and a filter press
  • the specific method for the slime water treatment device to treat the underflow in the concentrated water bucket comprises: the feed pump in the high frequency sieve sends the bottom flow in the concentrated water bucket
  • the high-frequency sieve is cut thick, wherein the coarse coal slurry on the high-frequency sieve falls into the lump belt and is transported to the coal bunker, and the sieved water leaked from the high-frequency sieve flows from the feed water tank in the filter press;
  • the feed pump in the filter press sends the sieve water in the feed water tank to the filter press for pressure filtration, wherein the filtered coal slurry falls into the lump belt and is transported to the coal bunker, and the filtrate flow is filtered.
  • the circulating water pump in the circulating water tank sends the filtrate to the drainage
  • the high frequency sieve screen is 0.5mm.
  • the beneficial effects of the invention are as follows: Firstly, through the coal underground sorting, the efficiency of the coal and the shovel separation, the jigging coal preparation efficiency and the sorting precision are high, and the transportation of the raw coal from the mine to the ground and the ground is not only reduced, but also The selection of raw coal quality in the Inoue Coal Washing Plant has been greatly improved, and the production capacity of the coal washing plant has been fully utilized. At the same time, the coal mine backfilling system is used to serve the underground mining of the mine. Secondly, the jigging coal preparation equipment has a wide range of feed size and a large processing capacity.
  • the jigging coal preparation process is relatively simple, the equipment operation and maintenance are relatively convenient, and the coal and vermiculite are sorted in the water medium to meet the downhole safety requirements.
  • the invention achieves the effective separation of coal and vermiculite by the coal preparation equipment in the underground roadway, and the vermiculite is no longer lifted to the well treatment after being used in the underground through the rockfill filling.
  • FIG. 1 is a flow chart of a method for squatting and smashing in a well according to the present invention
  • FIG. 2 is a schematic structural view of a downhole jigging system according to the present invention.
  • the invention adopts a set of underground coal gangue separation system, and achieves the formation process of the underground coal slag separation process through the preferred and rational arrangement of the coal preparation equipment.
  • FIG. 1 is a flow chart of a method for hopping and smashing in a well according to the present invention
  • FIG. 2 is a schematic structural view of a jigging and smashing system for a downhole according to the present invention.
  • Step 1 Raw coal preparation
  • Step 2 Raw coal washing
  • Step 3 Coal slurry treatment.
  • Step 1 Raw coal preparation; the main dark inclined well belt 24 on the raw coal into a sieve slit 75mm.
  • the scorpion Shangyuan coal passes through the raw coal bulk belt 26 (skin width 800mm) and enters the crusher arranged above the squeegee sifter 23 to be broken.
  • the 25 ⁇ 150mm product obtained after the crushing falls into the squeegee sifter 23.
  • the pendulum shaft sieve 2 falling into the sieve with a gap of 25mm is pre-classified.
  • the final coal (size less than 25mm) under the sieve falls directly into the final coal bunker, and the 25 ⁇ 150mm raw coal on the sieve enters the scraper screen. Extension 23.
  • the raw coal falling on the scraper sifter 23 is further sieved through a 6-segment section (screening 25mm) during transportation, and the sieved coal (size less than 25mm) is returned to the last coal bunker through the lower layer of the scraper sieving machine.
  • the raw coal (size 25 ⁇ 150mm) on the upper scraper flows into the smashing jig 6 through the head.
  • Step 2 Raw coal washing; 25 ⁇ 150mm raw coal enters the skimming jig 6 for washing and sorting out lump coal and vermiculite.
  • the lump coal and vermiculite are dewatered and transported through the shaped double-row bucket elevator 22, and the obtained lump coal products fall into the lump coal belt (width 650mm) and are transported to the lump coal bin 11, and the meteorite falls into the vermiculite transfer scraper via the vermiculite belt 20 (bandwidth 650mm).
  • the trigger 27 is transported to the Shishicang 10.
  • Step 3 Coal slurry water treatment;
  • the washing water overflowing from the jig 6 and the dewatering bucket machine flows to the concentrated water tank 8 .
  • the overflow in the concentrated water tank 8 flows from the circulating water tank 9; when the concentration of the slime water reaches a certain level, the underflow in the concentrated water tank 8 is pumped by the high-frequency sieve feed pump to the high-frequency sieve 21, and the upper portion is cut.
  • the coarse coal slurry falls into the lump coal belt, and the sieve water flows from the filter press tank to the filter press tank, and is pumped by the filter press feed pump to the filter press 12 for pressure filtration.
  • the crushed coal slurry falls into the lump coal belt, and the filtrate flows to the circulating water tank 9.
  • the circulating water pump in the circulating water tank 9 is sent back to the jig 6 for recycling. Civilized production, roadway dust reduction or accidental water flow to the sweeping pump pit and pumped to the accident water tank 25.
  • the accident pump is sent back to the circulating water tank 9 to participate in the closed circuit cycle of the system.
  • the underflow pump of the concentrated bucket is always turned on, every 20 minutes or so to ensure concentration.
  • the bottom pump of the bucket is not crushed by the slime.
  • the amount of coal in the meteorite is small: the density of the meteorite is less than 1.8g/cm3 and the amount is less than 5%;

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

提供一种井下跳汰排矸的方法。该方法包括如下步骤:原煤准备:毛煤经过筛分装置筛分后,筛上的原煤送入排矸跳汰机,筛下的末煤送入末煤仓;原煤洗选:送入排矸跳汰机的原煤进行洗选后分出的块煤和矸石分别经过异形双排斗式提升机脱水运输,块煤送入块煤皮带运至煤仓,矸石经矸石皮带运至矸石仓;煤泥水处理:跳汰机和异形双排斗式提升机溢流出的洗水自流至浓缩水桶;浓缩水桶中的溢流自流至循环水箱;浓缩水桶中底流经过煤泥水处理装置处理后分出煤泥和滤液,煤泥送入块煤皮带运至煤仓,滤液自流至循环水箱,由循环水箱送至排矸跳汰机循环使用。上述方法通过在井下巷道内的选煤设备达到煤和矸石的有效分离,矸石在井下通过矸石充填使用后不再提升到井上处理。

Description

井下跳汰排矸的方法
技术领域
本发明属于煤炭加工技术领域, 具体地说, 涉及一种井下跳汰排矸的方法。 背景技术
目前,国内外洗选加工技术一般应用于地面加工,即煤炭资源运输或提升到地面后, 由中央选煤厂或矿井选煤厂进行洗选加工。 但是随着矿井大型化和采煤机械化程度的不 断提高以及矿井开采深度的延伸, 尤其是放顶煤开采技术的广泛应用, 导致工作面断层 或顶底板及夹矸大量混入煤流中, 从而造成了毛煤中可见矸石增加, 严重制约了选煤厂 洗选能力发挥。 因此, 许多选煤厂增加了预排矸系统, 但都是设置在地面上, 增加原煤 从矿井到地面以及地面上的运输的过程, 生产成本高。 发明内容
针对现有技术的不足, 本发明提供一种井下跳汰排矸的方法, 不仅实现煤和矸石在 井下的有效分离, 而且提高生产能力、 减少生产成本。
具体地说, 本发明提供的井下跳汰排矸的方法包括以下步骤:
步骤 1 : 原煤准备; 毛煤经过筛分装置筛分后, 筛上的原煤送入排矸跳汰机, 筛下 的末煤送入末煤仓;
步骤 2: 原煤洗选; 送入排矸跳汰机的原煤进行洗选后分出的块煤和矸石分别经过 异形双排斗式提升机脱水运输, 块煤送入块煤皮带运至煤仓, 矸石经矸石皮带运至矸石 仓;
步骤 3 : 煤泥水处理; 跳汰机和异形双排斗式提升机溢流出的洗水自流至浓縮水桶; 其中, 浓縮水桶中的溢流自流至循环水箱; 浓縮水桶中的底流经过煤泥水处理装置处理 后分出煤泥和滤液, 煤泥送入块煤皮带运至煤仓, 滤液自流至循环水箱, 由循环水箱送 至排矸跳汰机循环使用。
在步骤 1中, 筛分装置包括篦子、摆轴筛和刮板筛分机; 原煤准备的具体过程包括: 原煤通过输送带进入篦子, 篦子上原煤经原煤大块皮带进入布置在刮板筛分机上方 的破碎机进行破碎,破碎后的原煤落入刮板筛分机;透过篦子的原煤落入摆轴筛上筛分; 经过摆轴筛的筛下末煤落入末煤仓, 摆轴筛筛上的原煤进入刮板筛分机; 落入刮板筛分机的原煤经过进一步筛分, 透筛的末煤经刮板筛分机的下层刮板送至 末煤仓, 刮板筛分机的上层刮板上的原煤经机头送入排矸跳汰机。
篦子的筛缝为 75mm; 大块皮带的宽度为 800mm。
破碎机破碎后的原煤尺寸为 25〜150 mm, 透过篦子的原煤尺寸为 150 mm。
从摆轴筛筛上落入刮板筛分机的原煤尺寸为 25-150 mm。
进一步地, 刮板筛分机包括 6节筛, 落入刮板筛分机的原煤经过 6节筛分段筛分后 分别送入末煤仓和排矸跳汰机; 摆轴筛的筛缝和 6节筛的筛缝都为 25 mm。
在步骤 2中, 块煤皮带的宽度和矸石皮带的宽度都为 650mm。
送入排矸跳汰机的原煤尺寸为 25-150mm。
送入末煤仓的末煤尺寸小于或等于 25mm, 送入煤仓的块煤尺寸为 25-150mm。 在步骤 3中, 煤泥水处理装置包括高频筛和压滤机, 煤泥水处理装置处理浓縮水桶 中的底流的具体方法包括: 高频筛中的入料泵将浓縮水桶中的底流送至高频筛上截粗, 其中, 高频筛筛上的粗煤泥落入块煤皮带后运至煤仓, 从高频筛中漏出的筛下水自流至 压滤机中的入料水箱; 压滤机中的入料泵将入料水箱中的筛下水送至压滤机进行压滤, 其中, 压滤出的煤泥落入块煤皮带后运至煤仓, 压滤出的滤液流至循环水箱, 循环水箱 里的循环水泵将滤液送入排矸跳汰机循环使用。
其中, 高频筛筛缝为 0.5mm。
本发明的有益效果在于: 首先, 通过煤炭井下分选, 满足井下煤、 矸分离, 跳汰选 煤的效率和分选精度较高, 不仅减少原煤从矿井到地面以及地面上的运输, 而且使井上 洗煤厂入选原煤煤质得到大大改善, 使洗煤厂生产系统能力得到充分发挥, 同时配合矸 石回填系统为矿井的井下开采服务。 其次, 跳汰选煤设备的入料粒度范围较宽, 处理能 力也较大。 再者, 跳汰选煤工艺相对比较简单, 设备操作、 维修比较方便, 并且煤与矸 石在水介质中分选, 符合井下安全要求。 本发明通过在井下巷道内的选煤设备达到煤和 矸石的有效分离, 矸石在井下通过矸石充填使用后不再提升到井上处理。 附图说明
图 1为本发明井下跳汰排矸的方法流程图;
图 2为本发明采用的井下跳汰排矸系统结构示意图。
附图标记:
2.摆轴筛 3.分级破碎机 6.跳汰机 8.浓縮水桶 9.循环水箱 10.矸石仓 11.块煤仓 12.压滤机
20.矸石皮带 21.高频筛 22.斗式提升机 23.刮板筛分机
24.主暗斜井皮带 25.事故水箱 26.大块原煤皮带
27.矸石转载刮板机 具体实施方式
下面结合附图和实施例, 进一步说明本发明井下跳汰排矸的方法。
本发明采用一套井下煤矸分离系统, 通过选煤设备的优选及合理布置达到井下煤矸 分离工艺流程的形成。
图 1为本发明井下跳汰排矸的方法流程图, 图 2为本发明采用的井下跳汰排矸系统 结构示意图, 如图 1、 图 2所示, 本发明井下跳汰排矸的方法包括三个步骤: 步骤 1 : 原煤准备; 步骤 2: 原煤洗选; 步骤 3 : 煤泥水处理。
步骤 1 : 原煤准备; 主暗斜井皮带 24上原煤进入一个筛缝 75mm的篦子。 篦子上原 煤经原煤大块皮带 26 (皮带宽 800mm) 进入布置在刮板筛分机 23上方的破碎机进行破 碎,破碎后所得 25〜150mm产品落入刮板筛分机 23。透过篦子的原煤(尺寸小于 150mm) 落入筛缝 25mm的摆轴筛 2预先分级, 筛下的末煤(尺寸小于 25mm)直接落入末煤仓, 筛上 25〜150mm原煤进入刮板筛分机 23。落入刮板筛分机 23上的原煤在运输过程中经 过 6节筛分段 (筛缝 25mm) 进一步筛分, 透筛的末煤 (尺寸小于 25mm) 经刮板筛分 机的下层返回末煤仓; 上层刮板上的原煤(尺寸 25〜150mm)经机头流入排矸跳汰机 6。
步骤 2: 原煤洗选; 25〜150mm原煤进入排矸跳汰机 6进行洗选, 分选出块煤和矸 石。块煤与矸石经由异形双排斗式提升机 22脱水运输, 所得块煤产品落入块煤皮带(带 宽 650mm) 运至块煤仓 11, 矸石经由矸石皮带 20 (带宽 650mm) 落入矸石转载刮板机 27, 运至矸石仓 10。
步骤 3 : 煤泥水处理; 跳汰机 6和脱水链斗机溢流出的洗水自流至浓縮水桶 8。 浓 縮水桶 8中的溢流自流至循环水箱 9 ; 当煤泥水浓度达到一定程度之后, 浓縮水桶 8中 的底流由高频筛入料泵泵送至高频筛 21 上截粗, 筛上粗煤泥落入块煤皮带, 筛下水自 流至压滤机入料水箱, 经压滤机入料泵泵送至压滤机 12进行压滤。 压滤出的煤泥落入 块煤皮带, 滤液自流至循环水箱 9。 循环水箱 9里的循环水泵送回跳汰机 6循环使用。 文明生产、巷道降尘或事故水自流至扫地泵坑泵送至事故水箱 25。事故水泵送回循环水 箱 9参加系统闭路循环。 浓縮水桶的底流泵时常开启, 每次 20分钟左右, 以保证浓縮 水桶底流泵不至被煤泥压死。
在煤炭技术领域, 毛煤是指煤矿直接生产出来, 未经过任何筛分、破碎和分选的煤; 原煤为仅可能经过筛分、 破碎或手选处理的煤; 末煤通常指粒度为 0.01〜13mm的煤, 国际标准通常指 0.01〜25mm的煤。 块煤是粒度大于 13mm的各粒级煤的总称。
实现井下跳汰排矸的方法的排矸系统包括筛分破碎系统、 洗选系统和煤泥水处理系 统, 其中, 筛分破碎系统实现为有效排矸进行粒度控制; 洗选系统完成矸石分选及分运 分储操作; 煤泥水处理系统通过煤泥水控制达到系统中洗水闭路循环。
具体地说, 在筛分破碎系统中, 通过篦子 (棒条筛), 摆轴筛, 刮板筛分机, 破碎 机将入洗原煤进行粒度控制; 小于 25mm煤进入末煤仓, 大于 150mm煤进入破碎机破 碎。 到 150mm以下, 25〜150mm煤进入跳汰机进行排矸洗选。
通过跳汰机, 异形双排斗式提升机, 胶带输送机完成原料煤的分选及选后块煤和矸 石的脱水, 运输及分储。
通过事故水箱、 浓縮水箱、 高频筛、 压滤机入料水箱、 压滤机及循环水箱, 完成洗 选所需用水的要求及达到系统内部洗水闭路循环。
采用本发明处理的原煤可以实现的技术指标如下:
1.系统生产能力高: 系统处理能力达到 700t/h;
2.数量效率大于 90%, 其中, 数量效率是指实际回收率与理论回收率的比。 其中理 论回收率根据入洗原煤资料获得。
3.矸石带煤量少: 矸石中密度小于 1.8g/cm3的量不超过 5% ;
4.生产成本低 (加工费): 吨煤加工费小于 6元 /t。
目前国内外还没有井下排矸系统使用先例, 本发明符合煤炭绿色开采理念, 在矿井 中具有重大的推广应用价值。

Claims

权利要求书
1.一种井下跳汰排矸的方法, 其特征在于: 包括以下步骤:
步骤 1 : 原煤准备; 毛煤经过筛分装置筛分后, 筛上的原煤送入排矸跳汰机, 筛下 的末煤送入末煤仓;
步骤 2: 原煤洗选; 送入排矸跳汰机的原煤进行洗选后分出的块煤和矸石分别经过 异形双排斗式提升机脱水运输, 块煤送入块煤皮带运至煤仓, 矸石经矸石皮带运至矸石 仓;
步骤 3 : 煤泥水处理; 跳汰机和异形双排斗式提升机溢流出的洗水自流至浓縮水桶; 其中, 浓縮水桶中的溢流自流至循环水箱; 浓縮水桶中的底流经过煤泥水处理装置处理 后分出煤泥和滤液, 煤泥送入块煤皮带运至煤仓, 滤液自流至循环水箱, 由循环水箱送 至排矸跳汰机循环使用。
2. 如权利要求 1所述的井下跳汰排矸的方法, 其特征在于: 在步骤 1中, 筛分装置 包括篦子、 摆轴筛和刮板筛分机; 原煤准备的具体过程包括:
原煤通过输送带进入篦子, 篦子上原煤经原煤大块皮带进入布置在刮板筛分机上方 的破碎机进行破碎,破碎后的原煤落入刮板筛分机;透过篦子的原煤落入摆轴筛上筛分; 经过摆轴筛的筛下末煤落入末煤仓, 摆轴筛筛上的原煤进入刮板筛分机; 落入刮板筛分机的原煤经过进一步筛分, 透筛的末煤经刮板筛分机的下层刮板送至 末煤仓, 刮板筛分机的上层刮板上的原煤经机头送入排矸跳汰机。
3. 如权利要求 2所述的井下跳汰排矸的方法, 其特征在于: 篦子的筛缝为 75mm。
4. 如权利要求 2 所述的井下跳汰排矸的方法, 其特征在于: 大块皮带的宽度为 800mm。
5. 如权利要求 2所述的井下跳汰排矸的方法, 其特征在于: 破碎机破碎后的原煤尺 寸为 25〜150 mm。
6. 如权利要求 2所述的井下跳汰排矸的方法, 其特征在于: 透过篦子的原煤尺寸 为 150 mm。
7. 如权利要求 2所述的井下跳汰排矸的方法, 其特征在于: 从摆轴筛筛上落入刮 板筛分机的原煤尺寸为 25-150 mm。
8. 如权利要求 2所述的井下跳汰排矸的方法, 其特征在于: 刮板筛分机包括 6节 筛, 落入刮板筛分机的原煤经过 6节筛分段筛分后分别送入末煤仓和排矸跳汰机。
9. 如权利要求 8所述的井下跳汰排矸的方法, 其特征在于: 摆轴筛的筛缝和 6节 筛的筛缝都为 25 mm。
10. 如权利要求 1所述的井下跳汰排矸的方法, 其特征在于: 在步骤 2中, 块煤皮 带的宽度和矸石皮带的宽度都为 650mm。
11. 如权利要求 1所述的井下跳汰排矸的方法, 其特征在于: 送入排矸跳汰机的原 煤尺寸为 25-150mm。
12. 如权利要求 2所述的井下跳汰排矸的方法, 其特征在于: 送入末煤仓的末煤尺 寸小于或等于 25mm, 送入煤仓的块煤尺寸为 25-150mm。
13. 如权利要求 2所述的井下跳汰排矸的方法, 其特征在于: 在步骤 3中, 煤泥水 处理装置包括高频筛和压滤机, 煤泥水处理装置处理浓縮水桶中的底流的具体方法包 括: 高频筛中的入料泵将浓縮水桶中的底流送至高频筛上截粗, 其中, 高频筛筛上的粗 煤泥落入块煤皮带后运至煤仓, 从高频筛中漏出的筛下水自流至压滤机中的入料水箱; 压滤机中的入料泵将入料水箱中的筛下水送至压滤机进行压滤, 其中, 压滤出的煤泥落 入块煤皮带后运至煤仓, 压滤出的滤液流至循环水箱, 循环水箱里的循环水泵将滤液送 入排矸跳汰机循环使用。
14. 如权利要求 13 所述的井下跳汰排矸的方法, 其特征在于: 高频筛的筛缝为 0.5mm。
PCT/CN2013/080623 2012-08-06 2013-08-01 井下跳汰排矸的方法 WO2014023180A1 (zh)

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