Washing machine of ore washing tank
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1、 Sorting
sorting is a mineral processing method to separate useful minerals and gangue minerals by using the physical properties of ore, such as surface characteristics, optical properties, electrical properties, magnetic properties, radioactivity and the absorption and reflection ability of ore to rays. Sorting is mainly used for the separation of massive and granular materials, such as removing large waste rock or picking out large rich ore. The upper limit of separation particle size is 250-300 mm, and the lower limit is 10 mm. For some precious minerals (such as diamond), the lower limit is 0.5-1 mm. For the separation of non-metallic minerals, sorting can be used to preconcentrate or obtain final procts. It has the following advantages: it can partly replace the selective mining method with low efficiency and high cost; Large pieces of waste rock are removed in advance to save the transportation, crushing, grinding and mineral processing costs of waste rock; Improve the grade of ore and the content of useful minerals; The waste rock can be used for backfilling and building materials to rece its environmental pollution
sorting can be divided into three ways: flow sorting (continuous sorting), partial sorting (heap sorting) and block sorting. Flow separation is to make a certain thickness of material layer continuously pass through the detection area; Partial separation and block separation means that one ore or one ore passes through the detection area alone. The quality of block selection or partial selection is better. At present, block selection is the main method in instry. There are two types of block picking: manual picking and mechanical picking
Manual sortingaccording to the appearance characteristics (color, luster, shape, etc.) between ore and waste rock, ore or waste rock can be sorted out by hand, and can be divided into forehand sorting (picking useful minerals from ore) and backhand sorting (picking waste rock from ore). It is mainly used for the separation of some ores which are difficult to be sorted by mechanical methods or whose quality can not be guaranteed. For example, asbestos with long fiber and massive mica are selected from ore; Large gangue is picked out from kaolinite of coal measures. Hand picking is the simplest way of picking, but it has high labor intensity and low efficiency
2. Mechanical sorting γ According to the difference reflected by radiation or the difference of natural radiation ability of ore, the separation of ore and gangue is realized by means of instrument. For example:
radioactive sorting: associated ores containing uranium and thorium elements
ray absorption sorting: coal, iron and chromium ores
luminescent sorting: diamond, fluorite, scheelite and asbestos
photoelectric sorting: gypsum, talc, asbestos, marble, limestone, magnesite, wolframite, diamond
electromagnetic sorting: metal sulfide ore and oxide ore
With the development of modern science and technology, especially the application of electronic computer, the mechanical sorting is becoming more and more perfect, the efficiency is greatly improved, and the application field is graally expanded. At present, photoelectric sorting is more commonly used in the non-metallic ore instry with mature equipment
Fig. 2-1 mechanical picking principle diagram
Mechanical picking principle is shown in Fig. 2-1. The ore to be selected falls into the radiation area proced by the radioactive body evenly through the vibrating chute. Different physical signals will be generated after the ores of different properties are irradiated. The detector will send the detected signals to the information processing system, which will amplify and identify the signals, and finally send the command signal to the actuator, The actuator can divide the material into useful ore and waste rock. Generally, the high-speed air valve with up to 300 times per second is used in the actuator, which greatly improves the proction efficiency. The modern electronic technology is used as the control system with high degree of automation. The modern sorting machine has become a high-tech mineral processing equipment with camera, computer and so on
Friction ore washing is a kind of technology to treat the ore which is stuck with clay or contains more mud, including crushing and separation. For non-metallic minerals such as quartz and feldspar, after long-term weathering, the primary ore deposits exposed on the surface are wrapped by the decomposition procts of clay minerals or rocks, forming cemented or argillaceous bodies. In this case, the method of friction washing and disintegration, which is different from ore crushing, is often used to separate mineral monomers before separation, which can not only remove the surface adhesion of mineral particles, but also prevent unnecessary crushing or over crushing. Usually, minerals are soaked and washed in water medium, supplemented by mechanical agitation (adding dispersant if necessary). With the help of friction between minerals, mineral particles adhered by slime are separated from clay impurities, which is called friction washing. The surface of some weathered or primary fine-grained non-metallic minerals can be purified by friction washing to expose the surface which can reflect the properties of the ore itself. After the impurities are removed, not only the mineral particles themselves can be purified, but also the conditions for the subsequent purification operation (such as flotation) can be improved. Scrubbing (ore scrubbing) can not only be used as the preparation for other purification operations, but also complete the purification of minerals separately
Fig. 2-2 friction ore washing machines are mainly friction ore washing machines, cylinder ore washing machines, trough ore washing machines, etc. In addition, the double screw scrubbing machine is often used in the scrubbing and purification of some non-metallic minerals such as quartz and diatomite. The structure of friction washer is shown in Figure 2-2
Ore washing machine is a large-scale equipment used to clean ore in black and non-ferrous metallurgical mines, iron and steel, metallurgy, chemical instry and building materials. It is divided into spiral ore washing machine and cylinder ore washing machine
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among the numerous washing equipment, the spiral stone washer is widely used because of its reliable quality and moderate price, and it is often widely used by stone washing plants, concrete mixing stations and China Railway No.8 Engineering Group Co., Ltd
when the spiral stone washer works, it uses the strong water flow force in the water tank and the agitation of the impeller to make the sand and stone at the bottom of the tank roll upward, and then the washed materials are taken away by the impeller, so as to achieve the purpose of sand washing
when operating the spiral stone washer, the following points should be noted:
1. Before starting the spiral stone washer, you should first check whether the rotation of the spiral body is flexible. You can rotate it several times by hand to check the rotation of the spiral body, and then check whether there are foreign matters in the ore trough of the spiral stone washer. If so, you must clean it up before starting
2. Since the spiral stone washer belongs to water washing equipment, when using the spiral stone washer, it is better to install corresponding protective devices for the transmission device of the machine, such as motor, belt pulley, V-belt, etc., so as to avoid water splashing on the machine ring operation, resulting in power connection or slipping
3. Pay attention to whether the rotation direction of the motor and spiral body is correct after the spiral stone washer is started. In the process of operation, the material should be fed strictly according to the suitable particle size of the machine. It is strictly forbidden to exceed the required particle size of the machine, otherwise the spiral device of the machine will be damaged. If the machine proces abnormal sound and vibration ring operation, it is necessary to stop the machine first, Check and repair again, never check and repair the machine when it is running, which will threaten the safety of life. 4. When the spiral stone washer is out of service, it must stop the machine according to the correct stop sequence, and finally clean up the resial materials inside the machine, so as to facilitate the next no-load start-up.
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n.
cradle, birthplace, ship support
vt.
put... In cradle
cradle
cra.dle
ahd: [Kr & sup3; d“l]
D.J.[6kre! DL]
K.K. [6kred1]
n. (noun)
a small low bed for an infant, often full with rockers.
Cradle: a small, low bed for infants, usually equipped with bent bars
the earliest period of life:
infancy: the earliest stage of life:
from the cradle to the grave.
from birth to death
a place of origin; A birthplace:
birthplace; Birthplace:
the cradle of civilization.
a framework of wood or metal used to support something, such as a ship underlying construction or repair, A low flat framework that rolls on casters, used by a mechanical working bench an automobile. Also called shield
a low flat framework that rolls on casters, used by a mechanical working bench an automobile The part of a telephone that contains the connecting switch up on which the receiver and mouthpiece unit is supported.
a frame projecting above a scythe, Used to catch grain as it is cut so that it can be laid flat.
scythe equipped with such a frame.
scythe equipped with a cradle device furnised with rockers, Used for washing gold bearing dirty.
ore washing tank: a box shaped apparatus with bent rod used for washing gold bearing soil
v. (verb)
cra.idle, cra.dling, Cra.dles
v.tr. (transitive verb)
to place or retain in or as if in a cradle.
to hold or support protectively:
to hold or encircle protectively:
cradled the C At his arms.
to reach (grain) with a crab.
to place or support (a ship, For example) in a cradle.
to stand or support (a boat, for example)
to wash (gold bearing dirt) in a cradle.
to lie in or as if in a cradle.
to lie in or as if in a cradle Le English cradel
Middle English cradel
from Old English
from ancient English
CRA "dler
n. (noun)
cradle
[5kreidl]
n.
cradle
birthplace
(cradle shaped) bracket
baby age
(carving copper plate) chisel Electric protection network Gold panning device; Gold panning trough It is a device attached to the sickle to make the grains evenly arranged after cutting.
cradle, knife slide, rocket booster bundle, booster bundle fixing frame
Greece was the cradle of Western civilization.
Greece is the birthplace of Western civilization< br />Remember to put the telephone back in the cradle when you' Don't forget to put the microphone back on the receiver rack after you call<
cradle
[5kreidl]
vt.
shake the baby to sleep; Place the baby in the cradle; Tending, growth
originated from
cutting; Support the
panning (ore sand)
holding with a frame; He was cradled in luxury< Civilization was cradled somewhere in Asia<
She cradled the child in her arms<
cradleland
n.
birthplace
cradlesong
n.
lullaby Ling
cradleland
[5kreidl]
n.
mineral processing, elimination; Nurture, nurture Construction] arc top frame
Cat & 39; S cradle
from the cradle
from the cradle to the grave
from birth to death
in the cradle
in childhood; At first,
rob the cradle
get along with or get married with a person with a big age difference
struggle in the cradle
take preventive measures
the cradle of the deep
Ocean
watch over the cradle
watch growing up
discharge cradle
mp bucket
guard cradle
protection net
gun cradle
gun rack
launch Air drill slot bracket
split track: distribution box
12 fiber: 12 fiber