Method and device for dust control in tailing pit beach

FIELD: mining, particularly methods and devices to prevent dust generation in tailing pit benches by moistening thereof with water or liquid binding agent.

SUBSTANCE: device comprises self-moving vehicle, for instance pontoon water craft, provided with pump, vessel for reagent, hydraulic monitor, unit with executive tool for channel forming in bank area and isolated power generating plant. Above mechanisms are installed on water craft deck. Hydraulic monitor may rotate in horizontal and vertical planes. Drives of all mechanisms are linked with the power generating plant. Executive tool is installed below water craft floating line. Vessel for reagent is provided with proportioning device. Dust control method involves initially installing the water craft on tailing pit water surface; directing the water craft towards bank to area to be sprayed, in which working tool forms channel for water craft movement; pumping water from tailing pit into hydraulic monitor; adding reagent from vessel to water with the use of proportioning device and spraying the obtained liquid over dust-forming area. Water from tailing pit is used for above spraying operation and for water craft movement.

EFFECT: increased dust control efficiency.

2 cl, 2 dwg

 

The invention relates to the field of mining, in particular to methods and means for preventing the formation of dust on the beaches of tailings moistening with water or binding liquid.

There is a method of reducing dust-forming surfaces of the tailings moisture by increasing groundwater level [1].

This method has the limitation related to the fact that it is not always possible to prevent dusting of the entire area of the tailings beach

The known method and mobile dust suppression, irrigation installation to suppress dust loading faces in the pits with water or a binder liquid, in the form of hydropoetry, consisting of five railway tanks with a total capacity of 250 m3and the platform on which installed two giant. Time watering is 10-75 min at a flow rate per watering 80-100 m3water [2].

These installation and the method is not applicable for dust irrigation beach, due to the inability of the device to the track in the specific conditions of the tailings.

The closest in technical essence and the achieved result is the way and the mobile installation of dust irrigation, including water tank, pump, giant, and the piping system mounted on the vehicle chassis. Pump installation works from the box selection powerfully the minute car BelAZ-540, and the giant is installed with the possibility of rotation in the horizontal and vertical planes [3].

The disadvantage is difficult or impossible to cross in terms of the tailings beach.

The technical result of the invention is the increased efficiency reduce dusting on the beaches of the TMF.

The technical result is achieved in that the device provides a self-propelled vehicle, such as pontoon boats, on the deck which has a pump, a container for the reagent, the monitor can be rotated in horizontal and vertical planes, the node with the working body of the routing channel in the foreshore and auxiliary power plant connected to the actuators of all of the arrangements while working body is installed below the line of precipitation boats, and the capacity for the reagent is supplied by a dispenser.

The method of dust suppression is that the transport vehicle is initially set on the water of the tailings, then it is sent to the Bank in the irrigation sector, where working body paves the shoreline of the channel through which the craft is moving at giant pump pump water from the tailings dam, add the reagent from the container through the dispenser and irrigate dusty area. Working environment and the environment of movement of the craft is one who by water pond.

The mentioned set of features in the patent and technical literature is not detected, therefore, the invention meets the criteria of "novelty" and "inventive step".

1 shows a General view of the device for dust control; figure 2 - TMF with fragments of irrigated from different points of the beach.

The device is dust suppression on the beaches of the TMF is a transport vehicle 1, such as pontoon, on the deck which has a pump 2, a monitor 3, a container 4 for binding reagent with dispenser 5, the node with the working body 6 routing channel in the foreshore, and Autonomous power station 7 is connected to actuators (not shown) of all mechanisms. The node with the working body 6 is installed on the bow and/or stern below the line of precipitation boats 1 and presents suction shell. Monitor 3 and the working body 6 is installed to rotate in the horizontal and vertical planes. Craft 1 - shallow, flat bottom and a small draught.

The method of dust suppression is that the transport vehicle 1 is initially set in the water TMF 8, then it is sent to the Bank in the segment (sections a, B, C, D) 9 irrigation, where the working body 6 is paving the shoreline of the channel 10 through which the craft is moving into the ber is. Selecting the optimal position, the craft 1 is stopped, the giant 3 pumped by pump 2 water from the TMF 8, add the reagent from the tank 4 through the spout 5 and irrigate dusty plot 9, turning the monitor in horizontal and vertical planes. Working environment and the environment of movement of the watercraft 1 is a water-TMF 8.

The operation of the device and an example of performing the method.

The tests were carried out in conditions of the Mikhailovsky mining and processing plant. The tailings pond for storage of waste iron ore beneficiation plant includes three sections, interconnected by a by-pass piping to drain distilled water and overflow for water recycling concentrator. Alluvium in the section waste processing factories produce continuously adjustable in height in each section. The dusting of beaches occurs mainly during warm and dry.

Each section is equipped with at least one shallow craft 1, capacity 1.5 times higher than the total demand performance, in case of preventive shutdown of one of the devices.

Operating experience tailings dusting beach is in the middle part of his band. The upper band width of 30-40 m covered mainly large the particles and not pilot. Similarly, do not pilit and the coastal strip along the reservoir width up to 50 m, where the phenomenon of dust removed by hydration due to high groundwater levels. In this regard, and with the technical capabilities of the monitor is determined by the appropriateness of the length of the flow channel in dusty foreshore. Based on the sequence of irrigation areas and including precipitation, periodic (between the alluvial deposits of tailings) irrigation segments beach produce before dusting, water from the pond clarifier tailings or water with a binder reagent.

Craft 1 down to the shoreline and at the same time with his movements constructing, manipulating the working body 6 in the foreshore, a passage 10 to a given point (A-G), the desired length for the existing range jet jetting 3 irrigation area required. The excavated part is placed on the Bank of the canal, while under flow channel 10 is supplied water, which, in addition to irrigation, moisturizes specific area of dusty beach. Configure the monitor 3 at a given angle processing vertical spatial position of the jet set by turning the monitor in horizontal and vertical planes. Served in a giant 3 pump 2 water from tailings ponds 8 and the spout 5 of the vessel 4 - raschet the e amount of binding reagent, for example, surfactants (surfactant), which increase the adhesion of moist dispersed particles, and the range of the jet 80 m; the irrigated area from one point in a coverage of 0.6 the area of a circle with R=80 m 1.5 hectares; the processing time of the area of a circle 1 hour; the period of time between irrigations 7-8 days; binding reagent surfactant, wastes from the production of caprolactam. After irrigation the boats return on flow channel 10 in water and sent to the next point - B, or G, in which the sequence of operations is repeated.

Irrigation dusty area, you can start by passing the craft 1 channel 10 as pure water and aqueous solutions of binder compositions. The latter allows to increase the adhesion between the dispersed particles and to increase the period between irrigations. A number of chemical reagents and, respectively, 4 tanks for them depends on the adopted technology of fixing the dust

The moistened surface of the treated tailings beach after drying and fixing aqueous solution of the chemical reagent is characterized concatenated dispersed particles and is able to withstand the destructive effects of wind, i.e. not to pollute the atmosphere dust particles. Subsequent irrigation cycle is carried out after the reclamation and drying to a moisture content of the surface with the HHS where there is a danger of dust. Thus, observing a certain sequence of discharge slurry to the tailings dam and its irrigation beach by the claimed method using the device implements, reduce dusting of the dispersed particles, the process of irrigation a specific sector are continuously, as it does not require refueling water, i.e. the coating is formed with uniform parameters.

The proposed method and the device in comparison with the prototype allow you to create a technologically advanced way of dealing with dusting on the site, using water in the reservoir, to reduce the cost and processing time per unit area. When transporting boats use the surface of the water, which greatly simplifies the conditions of its use for irrigation is available any portions of the tailings beaches, and compactness and mobility compared to ground vehicles create additional benefits.

Sources of information

1. Waikoloa, Powereddevice. Dust suppression during excavation and loading operations at the open pit mines. 1976, p.57.

2. Waikoloa, Powereddevice. Dust suppression during excavation and loading operations at the open pit mines. 1976, p.58-59.

3. Waikoloa, PowerSave. Dust suppression during excavation and loading operations at the open pit mines. 1976, p.60 - prototype.

1. At trojstvo dust suppression on the beaches of tailings, including vehicle and mounted on it the capacity for reagent pump, jetting, which is mounted to rotate in the horizontal and vertical planes, characterized in that as the transport presents the craft, for example, pontoon, on the deck which has a pump, giant, the node with the working body of the routing channel in the foreshore and auxiliary power plant connected to the actuators of all of the arrangements while working body is installed below the line of precipitation boats can be rotated in planes, and the capacity for binding reagent is supplied by a dispenser.

2. The method of dust suppression on the beaches of the tailings, including the movement of the vehicle in the area of irrigation and the irrigation sector the beach tailings dust suppression reagent by submitting it to the giant, characterized in that the transport vehicle is initially set on the water of the tailings, then it is sent to the Bank in the irrigation sector, where working body paves the shoreline of the channel through which the craft is moving in a giant pumps pump water from the tailings dam, add the binding reagent from the container through the dispenser and irrigate dusty area, with the working environment and the environment movement of PLSR is DSTV is water pond.



 

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FIELD: mining, particularly methods and devices to prevent dust generation in tailing pit benches by moistening thereof with water or liquid binding agent.

SUBSTANCE: device comprises self-moving vehicle, for instance pontoon water craft, provided with pump, vessel for reagent, hydraulic monitor, unit with executive tool for channel forming in bank area and isolated power generating plant. Above mechanisms are installed on water craft deck. Hydraulic monitor may rotate in horizontal and vertical planes. Drives of all mechanisms are linked with the power generating plant. Executive tool is installed below water craft floating line. Vessel for reagent is provided with proportioning device. Dust control method involves initially installing the water craft on tailing pit water surface; directing the water craft towards bank to area to be sprayed, in which working tool forms channel for water craft movement; pumping water from tailing pit into hydraulic monitor; adding reagent from vessel to water with the use of proportioning device and spraying the obtained liquid over dust-forming area. Water from tailing pit is used for above spraying operation and for water craft movement.

EFFECT: increased dust control efficiency.

2 cl, 2 dwg

FIELD: mining industry, particularly means or methods for preventing, binding, depositing, or removing dust and preventing explosions or fires.

SUBSTANCE: method involves treating dust-and-gas cloud with finely-dispersed ionized liquid, for instance with water, with the use of sprinkling plants alternately arranged so that ions of liquid spays generated by plants have opposite charges. The sprinkling plants are located outside zone of possible plant damage or are protected against explosion action. Sequence of plant alternation, ionicity, liquid quantity and liquid spraying pattern are determined from tests and calculations based on particular pit or underground mine blasting conditions.

EFFECT: reduced time of particle coagulation on liquid droplets and time of particle precipitation, possibility to reduce dust cloud propagation.

2 cl, 2 dwg

FIELD: mining industry, particularly to catch dust generated by machines and/or rigs in mines and tunnels.

SUBSTANCE: dust catcher comprises body with precipitation member formed as demister comprising moistening nozzles and drip catching means. Fan with drive is arranged near inlet/outlet side thereof. Moistening nozzles located in front of the demister in air flow direction are made as spaced multijet nozzles having separate sprayers, which form common sprayed curtain. The fan is installed in cleaned gas flow downstream the demister and drip catching means. The fan is arranged in case connected to dust catcher body. Demister is installed in contaminated air flow at inlet side and is arranged in inclined position. Upper edge thereof projects relatively lower edge. Air deflectors are arranged between the demister and drip catching means. Bottom sheet is inclined towards drip catching means. Multijet nozzles project towards contaminated air flow and are connected to load-bearing frame obliquely installed in accordance with demister inclination angle. Dust catcher is provided with separate vessels for additives, which pass through metering device into water-pipe. Mixer connected to water-pipe or built in water-pipe is installed downstream the metering device. Spraying device is arranged in front of moistening nozzles and demister with drip catching means. Spraying device comprises spraying heads, which create water mist and is connected with water source or with water-pipe and metering device with mixer. Dust-contaminated air flow is mixed with water mist and then the obtained sludge is gathered. Moist air is dried by water droplet separation and then the dried air is introduced in cleaned gas flow. Gases generated as a result of explosion are laden with water mist preliminarily mixed with additives, which create ecologically safe compositions with nitrose or similar gases formed during explosion.

EFFECT: increased operational efficiency and reduced dust catcher size.

20 cl, 8 dwg

FIELD: mining, particularly to depress dust generated during rock milling in enterprises of mining and smelting, coal, construction industries.

SUBSTANCE: plant comprises control unit, high-pressure source, siphon-type vessels filled with ionized water having opposite polarities, spraying jets, which generate fine spray, electromagnetically driven pneumatic and hydraulic valves, pressurizing and purging air channels, water pipelines, coupling members for air and water pipelines and control circuits.

EFFECT: increased dust depression efficiency.

1 dwg

FIELD: mining.

SUBSTANCE: invention is related to the field of mining, in particular, to safety issues in coal mines, namely to explosions of methane caused by friction spark created as a result of mine machines picks friction against hard rocks. Method is suggested to assess danger of rocks regarding friction inflammation of air-methane mixture, which consists in the fact that rock samples are taken, their strength and content of silicon dioxide are determined, and then tests are carried out at test bench danger of friction sparking. In order to perform test, explosive mixture is formed in test bench, and nominal cutting speed is increased 1.5 times. If at hardness of rocks f from 3 and content of silicon dioxide up to 30% no inflammations were observed and no friction sparks were produced, then rock is considered safe. If at hardness of rock from 3 to 5 and silicon dioxide content from 30 to 50% with availability of friction sparks with temperature of up to 300C and absence of inflammations, rock is considered as spark-hazardous of the 1st extent, and if their temperature is more than 300C - to spark-hazardous of the 2nd extent. If at least one inflammation occurred from friction sparks, rock is considered highly explosive. Use of suggested method makes it possible to increase safety of cleaning and preparatory works.

EFFECT: development of fundamentals for rock classification procedure by danger of friction inflammation in case of their damage with account of their physical-mechanical properties.

FIELD: mechanics.

SUBSTANCE: device of pressure water supply to irrigation systems arranged on sections of shield mechanised support for underground mines, includes at least one system of plough or combine working element route irrigation in longwall, and at least one system for irrigation of worked space, upper ceiling and/or side mine with central water line for supply of spray nozzles of irrigation systems and switching valves. At the same time all switching valves for irrigation systems are installed in a single irrigation valve box, which is equipped with connection for water line and is arranged on section of shield mechanised support in the form of unit separated from hydraulic valve box.

EFFECT: improved operational safety of device for water supply into irrigation system.

8 cl, 4 dwg

FIELD: mining.

SUBSTANCE: method includes long-term treatment of a dust and gas cloud with water vapour during the blast and afterwards. Vapour is produced by a mobile steam generator by introduction of water in it that has been heated previously up to 65-70C. The steam generator is installed in the place that is safe from the blast and is directed along with the wind. Besides, prior to blasting, atmosphere above the blasting area undergoes treatment.

EFFECT: higher efficiency of dust suppression, manoeuvrability of plants.

1 dwg

FIELD: mining.

SUBSTANCE: previously laboratory analysis is carried out on coal from a bed and its packs to detect availability of elements and substances in them that may create compounds with water; natural cracking is detected, as well as cleat in the coal bed; wells are drilled from a bottomhole by coal, with length more than by 1 m of the mine skirting cycle; water is injected into the bed with continuous measurements of the methane, water pressure, injection time; the mine is tunnelled for the value of the hydrated bed with the speed that does not exceed methane release within permissible norms; in the area of bed hydration blast holes are drilled in the sides of the mine at each cycle to detect the hydration area. During arrangement of the mine, parameters are varied, which are related to injection of water into bed, maximum reduction of the released methane, optimising arrangement of the mine.

EFFECT: higher efficiency of development of gas-bearing coal beds.

4 dwg

FIELD: mining.

SUBSTANCE: method involves supply of frozen fluid obtained by mixing with liquid gas to the worked-out space. In addition, distribution of coal dust supplied to the worked-out space is determined as to particle fractions. Distribution of the obtained frozen fluid particles as to fractions is equal to distribution of coal dust as to particle fractions.

EFFECT: improving the prevention efficiency of coal self-ignition in mines.

FIELD: mining.

SUBSTANCE: method includes spraying a liquid in a flow of air arriving to a mined space. At the same time liquid spraying is alternated with supply of dry gas into coal deposits. Moisture content in gas discharged from the coal deposit is measured. Gas supply is replaced with liquid spraying in case moisture content stops dropping in gas discharged from coal deposit.

EFFECT: improved safety of mining works.

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