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NOV 19 2012

Mining machinery

Mining machinery

Mining machinery is used directly for mineral mining and rich selection operation of machinery. Including mining machinery and mineral processing machinery. Prospecting machinery work principle and structure of the similar mineral mining for mining machinery were mostly identical or similar, broadly speaking, prospecting machinery also belongs to the mining machinery. In addition, mine operations is also used massive crane, conveyor, ventilation and drainage machinery.

Mining machinery definition: directly used for mineral mining and rich selection operation of machinery. Including mining machinery and mineral processing machinery. Broadly speaking, prospecting machinery also belongs to the mining machinery. In addition, mine operations is also used massive crane, conveyor, ventilation and drainage machinery.

Mining machinery is the direct extraction of useful minerals and mining working with machinery and equipment, including: Mining of metal ore and non metal ore mining machinery; mining coal with coal mining machinery; mining oil used in oil drilling machinery. The first pneumatic disc shearer is Walker designed by British engineers, ca. in 1868 manufacturing success. Eighteen eighties, the United States has hundreds of oil wells using steam power impact drill drilling success, 1907, and rock drill in drilling oil and gas wells, and from 1937 onwards, it will be used for open pit mine drilling [1].

Mining machinery for underground and open pit mining mining machinery: drill hole by using drilling machinery; digging ore rock in mining machinery and machinery; drilling shaft and drift patio, with boring machine.

Drilling machine for drilling machine and drilling machine two, drill and open-air drilling and underground drill points.

①drill: used in the above medium hard rock drilling diameter of 20 mm to 100 mm, at 20 meters depth of blasting hole. According to its power can be divided into different pneumatic, hydraulic and electric power, internal combustion rock drill pneumatic rock drill, which is most widely used.

②openpit drill : according to the rock breaking mechanism different, divided into rope impact drill, drill, rotary blast hole drill. Cable percussion drill rig for low efficiency, has gradually been replaced other rig.

The downhole drilling: drilling pore size of less than 150 mm underground hole, besides the application of drilling machine can also be used from 80 to 150 mm small diameter DTH drill.

Using the tools of the axial pressure and rotating force on the rock surface rolling effect, direct rock breaking into the lane or well machinery and equipment. The knife has a disc cutter, the wedge tooth hobbing, spherical tooth hob and milling cutter. According to the different excavation roadway, divided into raise drill, drill shaft and tunnel boring machine.

①patio driller for drilling wells, specialized and the chute, generally do not need to enter the courtyard, with roller cone drill bit to drill hole orientation, with the disc cutter reamer reaming to composition.

②shaft drilling machine specially used for a drilling well, the drilling tool system, rotary device, derrick, drilling hoisting system and mud circulating system.

The tunnel boring machine, which is mechanical rock breaking and discharging processes of combining continuous mining machinery, mainly used for coal roadway in soft coal mine, the engineering tunnel and secondary hard rock in roadway excavation.

Coal mining operations already by 50 time half mechanization development to 80′s comprehensive mechanization. The comprehensive mechanized coal mining is widely used in shallow cutting depth type double ( single ) drum shearer loader ( or plane ), flexible scraper and hydraulic self-moving bracket and other equipment, so that the working face of coal, coal transportation, broken, support and other aspects of the realization of comprehensive mechanization. Double drum coal shearer is falling coal machinery. Motor speed reducer through the cutting part of the power transmission to the spiral roller falling coal, machine by moving the motor via a driving device to realize the traction part. Traction mode basically has two kinds, namely the cable traction and no chain traction. Cable traction with traction portion of the sprocket and secured to the conveyor chain engagement and realization.

The land of oil drilling machinery. According to the mining process is divided into drilling machinery, oil machinery, machinery and maintenance of oil well workover and fracturing, acidizing machinery. Drilling machinery for the development of an oil or gas well while drilling or production of a full set of machinery and equipment. Petroleum drilling machine, including derrick, winch, power machine, mud circulating system, a pulley device, system, turntable, wellhead equipment and electrical control system. Derrick crane for device, the travelling block and hook, lifting the other weight under suspension rig, drilling tool for drilling.

Dressing is in the collection of mineral raw materials, according to mineral properties, physical and chemical properties and chemical properties between selected useful mineral process. Implementation of this process are called beneficiation machinery. Beneficiation machinery according to the ore dressing process for crushing, grinding, screening, separation ( separation ) and dehydrating machine. Broken machinery common jaw crusher, gyratory crusher, cone crusher, roll crusher and impact crusher etc.. Grinding machine the most widely used is the drum mill, rod mill, ball mill, including gravel grinder and superfine laminated self grinder. Screening machine used in the inertia vibrating screen and resonance screen. Hydraulic classifier and mechanical classifier is widely used in wet type grading grading machine. Separation flotation machine used a full section airlift micro-foam flotation machine, dehydrated machine comparison is famous for multi-frequency dewatering screen tailings dry discharge system. [2] crushing and grinding system more famous is the superfine laminated autogenous mill.