Hydraulic transport at the enterprises of the mountain-concentrating industry is the important link of technological process of extraction and processing of mineral raw materials. Hydraulic transport of mineral raw materials has justified itself as an economic and effective intrafactory and main way of transportation, and hydro transport systems maintained are now competitive in comparison with other ways of transportation. [9]

One of the most difficult and emergency links in a technological chain of the concentrating enterprise is wave- mud system. It is connected by that the weighed coal-pedigree mix has very high abrasiveness that negatively influences on transport mechanisms and their knots containing a considerable quantity of mobile and rubbing details. As a result of abrasiveness deterioration the resource of mechanisms considerably decreases and finally their reliability considerably decreases and breakdown susceptibility increases. One of such elements of transport system at the concentrating enterprise are elevators which intended for lifting and dehydration of a damp concentrate.

For an exception of technological chain potentially unreliable and accident-prone link, I consider expedient installation air lifts instead of existing elevators ЭОС-6. The given decision will allow to raise reliability and to lower breakdown susceptibility wave-mud systems.

With modern level of technical development, perfection of enterprise systems plays the important role in its competitiveness. Replacement elevators air lift’s installation will allow:

• Considerably to raise reliability of hydro transport enterprise system;
• To lower expenses for major repairs and service;
• To reduce space occupied with installation;

Air lifts have been offered for the first time in 1846 by Kokfordom in Pennsylvania and almost simultaneously Siemens in England. But practical application air lift has received only since 1891. Air lift is one of the most simple ways of lifting a liquid. The action principle of air lift is based on two informed vessels a parity levels of liquids in inverse proportion to their relative densities. At air giving on air pipes in the amalgamator located below dynamic level of a liquid in a chink on 40-70 metres, the water air mix (pulp) which relative density considerably below relative density of water is formed. The water air mix because of a difference of relative densities rises on water elevating pipes to a mouth of a chink and streams in a catchment basin. Air lift installation consists of the compressor, air pipes, water elevating pipes and the amalgamator. [1]

Now there are 3 systems of air lift (fig. 1), air on relative positioning air and water elevating pipes in a chink:

1. concentrically when air moves on air pipes located in water elevating, and the pulp rises on a ring backlash between pipes (the central system or system the Field) (fig. 1а);
2. air and water elevating pipes settle down in a chink in parallel to each other ("nearby" or system Mamut) (fig. 1б);
3. concentrically but air moves on a ring backlash between pipes, and the pulp rises on the central water elevating pipe (Sanders's system).

Wide enough application have found air lift pumps for creation downhole liquid circulation. As at chute-lift operations with a double column of pipes air lift the usual chisel tool designs of connections of a double column of pipes are developed by locks is applied. Such way of fastening air lift pipes allows to accelerate round-trip, and also gives the chance to take out the central tubes easily if necessary. [2]

Air lift concerns one of the most simple ways of water rising of chinks, however whereas for air lift work expensive kind of energy - compressed air is used, in stationary water supply air lift apply mainly to artesian installations of small givings. Thanks to advantages of air lift, it widely apply to prorolling of prospecting, artesian and water lowering chinks with use of mobile compressors. There are examples of effective application of air lift for water fall at drifting vertical trunks. It is possible to carry to air lift other lacks:

• low coefficient of efficiency which does not exceed 20-22 %;
• the big metal consumption;
• a difficult compressor economy;
• necessity for big immersing of the amalgamator under dynamic level of a liquid in a chink;
• sharp increase of necessary expense of air, capacity of the compressor and decrease coefficient of efficiency. At increase in depth level of a pumped out liquid;
• difficulty of several falls creation in the course of skilled eviction;
• debit chinks are necessary for gauging special devices for the purpose of decontamination.

Advantages air lift concerns:

• equipment simplicity of a chink;
• possibility eviction liquids with the big maintenance of a firm phase;
• absence of moving parts;
• use possibility in the bent and directed chinks.

Giving and pressure of air lift installations depends on type of the applied compressor, depth deposition dynamic level of a liquid and diameter of water elevating pipes. Giving of air lift at application of mobile type installations of a recreation centre-9M, makes to 100 m3/ch, and the pressure to 120 m. At eviction waters from a chink debit is regulated by increase or reduction of quantity submitted in air lift the pump of air or depth immersing of the air lift amalgamator. For small chinks and for chinks with low dynamic level of air lift it is ineffective. [3,6]

• Chosen scheme airlift [10]
• Carried out preliminary calculations airlift [7]
• Made the choice of accessories
• Analysis of new technologies and developments in the airlift and hydrotransport

Figure 1 - Airlift motion (animamation, volume - 40,2 kb, consists of 7 shots, 9 reps, made in CoffeCup GIF Animator 6.1)

Thus, at modernisation wave-mud economy of LLC «Mospinsky CPE» replacement elevators operating on air lift installations with an air separator of a special design and use as power supply blast engines of TV-80-1.6 already available in a technological chain is expedient. The given decision will allow to raise reliability and to lower breakdown susceptibility wave-mud systems.

1. Энциклопедия эрлифтов / Ф. А. Папаяни, Л. Н. Козыряцкий, В. С. Пащенко, А. П. Кононенко – М.: Информсвязьиздат, 1995. – 592 с.
2. Эрлифтные установки/ Гейер В.Г., Козыряцкий Л.Н., Пащенко В.С., Антонов Я.К. – Донецк, 1982.
3. Эрлифтные установки: Учебное пособие/ В. Г. Гейер, Л. Н. Козыряцкий, В. С. Пащенко, Я. К. Антонов. – Донецк: ДПИ, 1982. – 64 с.
4. Стегниенко А. П. Исследование и разработка методов управления режимами работы шахтных эрлифтов: Дисс. … канд. техн. наук: 05.05.06. – Донецк: ДПИ, 1978. – 242 с.
5. Усков Е. В., Миргородский В. Г., Стегниенко А. П. Первые результаты эксплуатации месторождений полезных ископаемых. Выпуск 31. – Киев: Техника. – 1973. – с. 111-115.
6. Бойко М. Г., Козиряцький Л. Н., Кононенко А. П. Землесосні і ерліфтно-землесосні снаряди: Навчальний посібник. – Донецьк: ДонНТУ, 2007. – 296 с.
7. Кононенко А. П. Теория и рабочий процесс эрлифтов: Дисс. … док. техн. наук: 05. 05. 17. – Донецк: ДонНТУ, 2007 – 664 с.
8. Гейер В. Г. Новые технологические схемы и средства шахтного водоотлива. – Донецк: ДПИ, 1972. – 35 с.
9. http://ru.wikipedia.org/wiki/
   Свободная энциклопедия
10. http://www.stanoknavodu.ru/erlift
    Эрлифтные установки: схемы, основные формулы для расчёта.

At a writing of the given abstract master’s work is not finished yet. Date of definitive end of work is 1st December, 2010. Full text of work and materials on a theme can be received at the author or his supervisor of studies after the named date.