scholarly journals Efficiency of electricity use by mine drainage plants.

2021 ◽  
Vol 24 (1) ◽  
pp. 64-68
Author(s):  
KONDRATENKO, V. ◽  
◽  
KALINICHENKO, V. ◽  
KARDASH D. ◽  
◽  
...  
Keyword(s):  
Mine Drainage ◽  
Pressure Gauge ◽  
Drainage System ◽  
Electrical Network ◽  
Technical Diagnostics ◽  
Flow Meter ◽  
Pump Operation ◽  
Electricity Use ◽  
Rational Organization ◽  
Pumping Units

The experience of operating mine drainage plants indicates significant consumption of electricity consumed by pump electric motors. This situation of mine drainage is not always justified. Sometimes this can be caused by the operation of the components of the pumping unit (pump, electric motor, pipeline, electrical network) with underestimated efficiency. The article describes the methodology and provides methods for monitoring the efficiency of the use of electricity both as a whole by the drainage system and its constituent elements. The most vulnerable of the components of the drainage system is the pumping units themselves. This is primarily due to the complexity of the design of the pumps, the presence of moving parts and significant pressures during their operation. It is generally recommended to use a pressure gauge on the discharge line, a vacuum gauge on the water inlet side, and a flow meter to measure the pump flow to monitor the pump unit. In addition to these devices, for the diagnosis of unsatisfactory pump operation, it is recommended to additionally install a manometer that measures the pressure in the unloading chamber, a manometer that measures the pressure behind the unloading disc and a flow meter that measures the water flow in the unloader. The indicators of the proposed three control devices make it possible to determine by calculation such important pump parameters as the value of the axial force and the dimensions of the end and annular clearances of the unloading unit. This technique can be used as the basis for technical diagnostics and rational organization of the operation of existing installations. This allows you to control and promptly eliminate malfunctions that occur during the operation of drainage, save valuable equipment and eliminate wasteful energy costs.

Some aspects of improving the energy efficiency of a mine centrifugal pumps.

2020 ◽  
Vol 23 (2) ◽  
pp. 48-51
Author(s):  
V. KONDRATENKO ◽  
◽  
V. KALYNYCHENKO ◽  
Keyword(s):  
Energy Efficiency ◽  
Mine Drainage ◽  
Experimental Studies ◽  
Operating Mode ◽  
Centrifugal Pumps ◽  
Pump Unit ◽  
Drainage Systems ◽  
Start Up ◽  
Discharge Unit ◽  
Pumping Units

Mine drainage systems, which are used at the main drainage of mining enterprises, have a drive capacity of up to 1600kW. To reduce non-productive energy losses, as well as for the continuous operation of the mining company, mine pumps must be energy efficient and reliable. Analysis of downtime of drainage systems shows that the weak point is the unloading device. This fact can lead not only to the failure of the pumping unit, but also to possible prolonged downtime of the mine. The main disadvantage of the existing disk unloading devices of mine pumps is their low reliability and low service life, due to the rapid wear of the components of the unloading unit. The most vulnerable elements of the unloading device are the unloading rings. The need for frequent replacement and adjustment of the elements of the discharge unit is associated with disassembly and assembly of the pump directly in the pump chamber. Such actions require significant costs of unproductive manual labor of service personnel, and rapid wear of parts of the unloading device necessitates their constant replenishment. Malfunctions in the unloading device can cause significant pump failures. To increase the reliability and energy efficiency of mine drainage systems, the method of control of the unloading device was used. During the experimental studies it was found that cavitation phenomena during the operation of pumping units are absent and, accordingly, can not be the cause of wear of the elements of the unloading unit. When the pumps are operating in steady state, the displacement of the rotors was monitored for 3-4 hours on each pump unit. After data processing, it was obtained that the wear of the surface of the unloading rings occurs at a rate of 0.05-0.15mm in one hour. To determine the wear of the rings of unloading during start-up - stop of the pump, at first the indicators of measuring devices at the established mode of operation of the pump unit were fixed. Then the pump was turned off and on again. After starting the pump unit, we made sure that the operating mode of the unloading device did not change and compared the readings of the shaft position indicator before stopping and after starting the pump. From the measurements made it followed that stopping and starting the pump does not lead to noticeable wear of the unloading device. Therefore, it can be assumed that mainly the wear of the discharge rings occurs during the steady operation of the pump unit.

scholarly journals Effect of acid mine drainage on dissolved rare earth elements geochemistry along a fluvial–estuarine system: the Tinto-Odiel Estuary (S.W. Spain)

2012 ◽  
Vol 43 (3) ◽  
pp. 262-274 ◽  
Author(s):  
J. Borrego ◽  
B. Carro ◽  
N. López-González ◽  
J. de la Rosa ◽  
J. A. Grande ◽  
...  
Keyword(s):  
Rare Earth ◽  
Acid Mine Drainage ◽  
Rare Earth Elements ◽  
Mine Drainage ◽  
Drainage System ◽  
Estuarine System ◽  
Mixing Zone ◽  
Heavy Rare Earth ◽  
Acid Mine ◽  
Heavy Rare Earth Elements

The concentration of rare earth elements together with Sc, Y, and U, as well as rare earth elements fractionation patterns, in the water of an affected acid mine drainage system were investigated. Significant dissolved concentrations of the studied elements were observed in the fluvial sector of this estuary system (Sc ∼ 31 μg L−1, Y ∼ 187 μg L−1, U ∼ 41 μg L−1, Σ rare earth elements ∼621 μg L−1), with pH values below 2.7. In the mixing zone of the estuary, concentrations are lower (Sc ∼ 2.1 μg L−1; Y ∼ 16.7 μg L−1; U ∼ 4.8 μg L−1; Σ rare earth elements ∼65.3 μg L−1) and show a strong longitudinal gradient. The largest rare earth elements removal occurs in the medium-chlorinity zone and it becomes extreme for heavy rare earth elements, as observed for Sc. Samples of the mixing zone show a North American Shale normalized pattern similar to the fluvial zone water, while the samples located in the zone with pH between 6.5 and 7.7 show a depletion of light rare earth elements relative to middle rare earth elements and heavy rare earth elements, similar to that observed in samples of the marine estuary.

Arsenic removal by oxidizing bacteria in a heavily arsenic-contaminated acid mine drainage system (Carnoulès, France)

2002 ◽  
Vol 198 (1) ◽  
pp. 267-274 ◽  
Author(s):  
Marc Leblanc ◽  
Corinne Casiot ◽  
Françoise Elbaz-Poulichet ◽  
Christian Personné
Keyword(s):  
Acid Mine Drainage ◽  
Arsenic Removal ◽  
Mine Drainage ◽  
Drainage System ◽  
Acid Mine

Microbially enhanced dissolution of HgS in an acid mine drainage system in the California Coast Range

Geobiology ◽  
2013 ◽  
Vol 12 (1) ◽  
pp. 20-33 ◽  
Author(s):  
A. D. Jew ◽  
S. F. Behrens ◽  
J. J. Rytuba ◽  
A. Kappler ◽  
A. M. Spormann ◽  
...  
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Drainage System ◽  
Coast Range ◽  
California Coast ◽  
Acid Mine ◽  
Enhanced Dissolution

The Research and Development of the Coal Mine Underground Drainage Equipment Automatic Control System

2014 ◽  
Vol 1049-1050 ◽  
pp. 1038-1041
Author(s):  
Zhang Meng ◽  
Tao Zhu Feng ◽  
Guo Feng
Keyword(s):  
Control System ◽  
Service Life ◽  
Research And Development ◽  
Coal Mine ◽  
Mine Drainage ◽  
Drainage System ◽  
Labor Intensity ◽  
Relay Control ◽  
Coal Mine Drainage ◽  
Plc Control

The coal mine drainage equip ment plays an important role to make the production normally and orderly. At present, domestic coal mine drainage system implement manual monitoring, namely the traditional relay control method.Feature of this method is that a large labor intensity, low reliability and stability,and complicated control circuit,it has not adapted to the needs of the development of coal.In this paper, design of the automatic drainage system is to make up for the shortage of the traditional relay control,it adopts PLC control with a combination of PC monitor to improve the safety of the work,and has a long service life, convenient maintenance, etc.

scholarly journals PENGELOLAAN LINGKUNGAN PADA KEGIATAN OPERASI TAMBANG DARAT BIJIH TIMAH MENGGUNAKAN METODE BOREHOLE MINING DI WIUP PT. TIMAH, TBK

2020 ◽  
Vol 1 (1) ◽  
pp. 603614
Author(s):  
Nomensen Ricardo ◽  
Dewi Ayu Kusumaningsih ◽  
Teguh Nurhidayat
Keyword(s):  
Environmental Management ◽  
Carrying Capacity ◽  
Mine Drainage ◽  
Drainage System ◽  
Environmental Problems ◽  
Water Jet ◽  
Mining Activities ◽  
Mining Method ◽  
Borehole Mining ◽  
Back Filling

ABSTRAK Borehole mining (BHM) merupakan metode penambangan menggunakan aliran air bertekanan tinggi (water jet) dan dikombinasikan dengan sistem pemompaan slurry dari bawah tanah. Dalam upaya meningkatkan produksi bijih timah, PT. TIMAH, Tbk melakukan kegiatan penambangan menggunakan metode BHM. Pemilihan metode penambangan BHM bertujuan untuk menambang sumberdaya marginal tanpa memerlukan stripping overburden (OB), dengan prinsip kerja: membuat lubang vertikal hingga dasar zona target menggunakan alat holemaker; dengan memanfaatkan tekanan water jet, air akan memberai material di sekelilingnya; saat material terberai, pompa tanah siap menghisap slurry hingga ke permukaan. Kapasitas penambangan efektif menggunakan metode BHM adalah 750 m3/bulan, dengan jam jalan efektif alat 125 jam/bulan. Kegiatan penambangan dengan metode BHM ini, berpotensi menimbulkan masalah lingkungan diantaranya terbentuknya lubang bekas penambangan (void) dan genangan air di sekitar lokasi tambang. Pemindahan tanah dari bawah permukaan pada kegiatan ore getting dengan volume 750 m3 dapat mengganggu struktur dan kekuatan tanah sehingga menyebabkan runtuhan/amblesan yang pada akhirnya menghasilkan void. Pengelolaan lingkungan yang tidak baik dapat menimbulkan masalah yang serius terhadap bentang lahan dan akan menimbulkan dampak turunan seperti masalah sosial. Perencanaan desain penutupan lahan dengan metode backfilling menjadi terobosan untuk mengatasi void yang ada. Prinsipnya, material yang akan diambil pada titik penambangan berikutnya ditransfer ke void sebelumnya yang telah terbentuk dan demikian seterusnya. Di samping itu, dilakukan revegetasi di sekitar lokasi penambangan BHM untuk meningkatkan daya dukung tanah. Limpasan air ke permukaan secara kontinu menyebabkan kondisi lahan sekitar menjadi lembab (jenuh air) sehingga daya dukung tanah menurun. Kegiatan penambangan menggunakan metode BHM di PT. TIMAH, Tbk memang merupakan suatu terobosan dalam konservasi cadangan bijih timah. Namun, aspek lingkungan juga menjadi hal yang perlu diperhatikan. Pengelolaan lingkungan yang tepat dapat meminimalkan masalah lingkungan yang terjadi. Lubang-lubang berdiameter 1,5 hingga 3 meter yang dihasilkan dapat diatasi dengan sistem back-filling. Limpasan air di permukaan diatasi dengan perencanaan sistem penirisan tambang yang terencana yaitu dengan pembuatan jalur/paritan di sekitar area penambangan. Kata kunci: borehole mining, void, backfilling  ABSTRACT Borehole mining (BHM) is a mining method using high pressure water flow (water jet) and combined with an underground slurry pumping system. In an effort to increase tin ore production, PT. TIMAH, Tbk conducts mining activities using the BHM method. The selection of the BHM mining method aims to mine marginal resources without the need for stripping overburden (OB), with the working principle: making vertical holes to the bottom of the target zone using a holemaker; by utilizing the pressure of a water jet, water will fill the surrounding material; when the material is dispersed, the ground pump is ready to suction the slurry to the surface. The effective mining capacity using the BHM method is 750 m3 / month, with effective road hours of 125 hours / month. Mining activities using the BHM method have the potential to cause environmental problems including the forming of void pits and puddles around the mine site. Displacement of soil from below the surface in ore getting activities with a volume of 750 m3 can disrupt the structure and strength of the soil, causing collapse / subsidence which eventually produces voids. Improper environmental management can cause serious problems for the landscape and will cause derivative impacts such as social problems. Land cover design planning with backfilling method is a breakthrough to overcome existing voids. In principle, the material to be taken at the next mining point is transferred to the previously formed voids and so on. In addition, revegetation was carried out around the BHM mining location to increase the carrying capacity of the soil. The runoff of water to the surface continuously causes the surrounding land to become moist (saturated with water) so that the carrying capacity of the soil decreases. Mining activities use the BHM method at PT. TIMAH, Tbk is indeed a breakthrough in the conservation of tin ore reserves. However, environmental aspects also need to be considered. Proper environmental management can minimize environmental problems that occur. The holes with a diameter of 1.5 to 3 meters produced can be overcome with a back-filling system. Surface runoff is overcome by planning a planned mine drainage system by making a path / trench around the mining area Key Words: borehole mining, void, backfilling  

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