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Reprinted from 354922715 at 23:39 on November 20 2010 read (loading. ..) Comments (0) Category: Personal Diary
Coal workers should be aware that exam
one, fill in the blank
1, the media are used in coal preparation gravity (), (), and () or re-suspension. Air, Water and heavy liquid
2, in the coal preparation process, the medium is () media, and also charged with () and () role.
transfer energy particle swarm transport loose materials
3, Coal is the use of planktonic ( ;) for sorting. difference between the particle surface wettability
4, jigging is to use () to jump the pulse of water eliminated by a few raw materials on the sieve () stratification.
alternating vertical density
5, the air-type jig according to the location of the air chamber can be divided into (), and the jig () jig.
sieve screen the following formula Side
6, jigging medium is used (), used in heavy medium coal preparation The media is ().
water, the preparation of magnetite powder and water suspension
7, re-jig the product of the sieve in the institutions on a common automatic nesting there (), (), (), and () nesting mode.
impeller fan trunk pipe-line gate valve float
8, jigging impact factors (), ( ) and () three areas.
raw nature of the structural characteristics of the jig jig work system
9, collector can improve the surface of coal particles ( ) and coal particles on the bubble ().
hydrophobic fixation strength
10, heavy medium cyclone feeding methods are (), ( ), () three.
constant pressure feed pump feed tank pressurized feeding
11, optional use of the curve is ( ), (), (.)
determine the theory of separation indexes determine the difficulty of assessing the optional separation efficiency
12, the basic structure of the jig by the ( ;), (), (), () composition.
sieve valve body Discharge Device
13, said raw coal washability curve ( ) consisting of icons, including (), (), (), ( ) and ().
buoyancy characteristic density curve of ash sediments from the density curve of density curve +0.1 g/cm3 curve
14, flotation machine can be divided in different ways according to inflate (), (), and () flotation machine.
agitated stirred-free hybrid
15, jigging in the size range typically ( ;), sometimes up to ().
0.5 - 50mm 100mm
16, the inclination of sieve jig main () and () two effects.
maintain bed for transport
17, pharmacy system is used in coal flotation process flotation agent (), () () and () in general. types of content sites
dosing means dosing
18, the jig valve types are ( ;), (), (.) CNC rotary valve slide valve
valve
19, flotation agent according to the role can be divided into (), () ().
collector frother modifier
20, the main factors affect the flotation process are (), ( ), (), (.) The nature of slime flotation machine the nature of work systems operating system liquid flotation process
21, assessment of the effect re-election equipment and technology indicators () () ( ) and (). degree of deviation of the number of possible imperfections
efficiency of the total mismatch of material
22, the product of the jig with light ( ;), re-use the product () and () two.
sieve sieve nesting nesting nesting through the sieve
23, heavy medium coal preparation equipment ( ), () and () and so on.
lump of coal sorting machine at the end the three product cyclone Cyclone
24, is the use of magnetic separator of ( ;) and () separate from the device.
magnetic non-magnetic minerals
25, the jig at the position where the process in divided into () and ( .)
main wash washing jig jig
26, the jig with water () and ( ;) composed of two parts.
top cross flush water
27, foaming agent can promote dispersion into the air in the pulp (), and has added the bubble ( ;). the stability of a large number of bubbles
28, NC valve consists of () ( ) () in three parts.
electronic numerical control unit pneumatic air driven system work system
29, the jig common faults () () () three.
sieve valve failure fault fault discharge
30, the current jig automatically detect the production of common components are (), ( ;) and () detection.
radioisotope detection buoys detected piezometric
31, Standard for Evaluation of China's coal optional optional in level is used ( ) method to be judged.
separation density +0.1 content
32, controls the density of suspension include the density (), () and ( ;) three.
dual density meter water column pressure isotope equilibrium density meter density meter
33, flotation devices can be adjusted to set the slurry preparation () and add ( ;). Flotation concentration of the slurry
Second, determine the question
1, LTX-14 Jig in Coal section of the jig has three rooms. ()
2, the density of coal particles due to the more obvious types of minerals. ()
3, the intake valve phase, expansion phase, the exhaust is based on the length nature of the materials selected to choose. ()
4, optional is the inherent characteristics of coal, in Coal production can not be changed. ()
5, to do float and sink with water before the experiment must be attached to the coal particles on the washed slime. ()
6, the jig only damper characteristic cycle of the structure of the frequency with the jig, air pressure and the jig structurally unrelated.
7, the laying of artificial bed is through the screen to control the speed and product quality. ()
8, in the flotation process, the bubble is the separation medium, the same vehicle is clean coal particles . ()
9, XJM-8-type flotation machine using the new dosing approach, given full play the role of the pharmacy. ()
10, the production of dosing adjustments before adding the order of the general agent, together with foaming agent, the last Canadian collector. ()
11, Bada Ke Jig sad for the screen-type jig. ()
12, in a jigging cycle, up early, determined the height of the bed raised bed of loose degrees. ()
13, filter suction speed of the decision filter and drying time. ()
14, improved suspension stability is to use the red flow. ()
15, the current general understanding of: the jig with the wind followed by the discharge into the expected increase. ()
16, flotation process depends on the choice of material properties and product specifications. ()
17, screen side of the air chamber and screen jig jig under the air chamber in the structure of the main differences are: the location of the air chamber is different. ()
18, bubble mineralization and mineral particles through several bubble collision Nianzhao this pathway. ()
19, in the production process, flotation float in front of more than two-bedroom is fine-grained materials. After a few rough material is always in the float chamber. ()
20, jigging is the best size range 50 - 0mm level. ()
21, a low frequency large amplitude of the working system, because of the more difficult operation, it is easily adapted to the lump coal or coal preparation sorting. ()
22, jig jig bed is heavy on the screen the product. ()
23, using high frequency small amplitude of the working system, the more difficult because of operation, it applies only to lump coal or coal preparation and easy sorting. ()
24, a large contact angle of the hydrophilic material is weak, the poor can be floating. ()
25, XJM-8 impeller flotation with the umbrella group also completed the stator midge, breathing and circulation of three role. ()
26, jet flotation machine is the main characteristics of coal slurry. ()
27, increasing the amount of wind can make the Bed Porosity increased, but remain loose bed was no significant increase in state large. ()
28, the gangue content and, in the middle of coal washability and decrease good raw coal, sieve jig The angle should be smaller. ()
29, screen-side air-type jig main drawback is that pulse width of water flow along the uneven distribution of the jig chamber. ()
30, the actual number of efficiency is the clean coal yield and the percentage of theoretical yield. ()
31, jigging is referring to things in the horizontal flow of conversation, press the density separation process. ()
32, tuck the stability of the suspension means suspension sorting equipment in the density of points within a certain period of time remains the same capacity. ()
33, causing the loss of magnetite is due to de-mediated effects caused by products not take part of magnetite . ()
34, compared with the slide valve, rotary valve can increase the handling capacity of about 20%. ()
35, when the stability cyclone formed along the central axis of the air column. ()
36, with dual suspension pressure density meter density measurement should be placed in the bucket of qualified media. ()
37, XJM-4-type flotation machine with DC-type feeder, XJM-8 type with suction feeder. ()
38, foaming agents can make use of its bubbles around the hydration film thickness, increased. ()
39, closed water circuit is the key to all of the treated slurry recycling. ()
40, particle size by screening experimental curve can be drawn to understand the quality and quantity of any one class. ()
41, floating and sinking experiments are generally in the configuration of magnetite powder and water in heavy liquid were hungry. ()
42, the gravity coal preparation process, the same density level of the coal particle size composition of its fine grain size than the easy separation. ()
43, lump or re-grading the product of selected nesting materials approach to the screen based on the marker. ()
44, HM separation process because the higher processing costs, process complexity and the equipment is badly worn, so are not widely used . ()
45, Coal Dense Medium Separation is of negative factors, the production process should be noted that the discharge will be from the suspension. ()
46, Cyclone memory in a low-density and high density materials, the separation of interface, the interface and separation of the basic density of medium density the same. ()
47, lost to complement the suspension, lump coal dense medium separator to be added in the suspension cycle. ()
48, different size particles have different flotation rate, coarse-grained flotation of coal with high speed. ()
49, the ash coal flotation process increases, the end of the coal ash will be reduced. ()
50, increasing the minimum separation jig will be flotation feed into the feeding amount and maximum particle size decreases. ()
51, the water attached to the solid surface is called wetting. ()
52, in a jigging cycle, the intake valve is to make the bed of the displacement, expansion of is to make loosely layered bed, the exhaust is to make the powder of refuse through the sieve. ()
53, HM the stability of suspensions increased with average particle diameter of less quality increase, but its viscosity also increased. ()
54, high frequency, small amplitude end of the jig adapted to coal, hard coal preparation sorting. ()
55, mineral flotation is based on the density difference between the sorting of fine (0.5mm or less) the election of coal coal method. ()
56, coal rank coal of different options is also different, middle coalification degree of coal can float the best. ( ;)
57, in addition to a foaming agent mixed polarity effect, also has the effect of collector emulsification effect. ()
58, although sulfur coal in an impurity, but little impact on coal use. ()
59, through the rise and fall experiments to understand the size distribution of coal. ()
60, through the screening experiments to understand the density of coal composition. ()
61, said coal ash is a characteristics curve in the yield of floating objects and their cumulative average ash relationship. ()
62, optional level of coal in the optional standard assessment method used in the coal content. ()
63, in the flotation process used in the pharmaceutical preparations are added to the device in the coal slurry. ()
64, sediments curve is that its rate of coal ash in the Journal of the relationship between property curve. ()
65, the jig down the speed in the vertical flow of the particles play a key role by density stratification. ()
66, jig for fine coal screen surface must be covered with a layer of lower density, larger particle size material layer, called the artificial bed. ()
67, the jig across the water with two parts water flush and the top, where the total cross-flushing water 70-80%. ()
68, the jig of the screen under the top of the second paragraph of the water than a large amount of the first paragraph. ()
69, coarse raw materials of good quality and poor quality of fine particles, in addition to the air valve to adjust, but also to use air flow, a small amount of water principles. ()
70, in the flotation process of collector adsorbed molecules are mainly in the solid-liquid interface of molecular adsorption and foaming agent adsorption in the gas-liquid interface. ()
71, evaluation of slime to float method is to use fuel of the body recovery. ()
72, paragraph sieve jig waste rock is usually 1 degree -2 degree angle, nearly horizontal segment in the 2 degrees of coal - 5 degrees. ()
73, = coal ash in the ash - coal ash - ash waste rock. ()
74, in the coal preparation plant, used in flotation devices typically filter press dewatering. ()
75, the jig guide plate can improve the jig screen pulsating lateral flow distribution along the width of the inhomogeneity of the body. ()
76, with the appropriate standard is the feng shui bed stability, the material according to density stratification clear. ()
77, raw coal particle size uniformity, better quality, should be taken to flood the operation of small wind systems, coal particles of raw materials uniform, poor quality, small water should be taken to the operating system of the wind. ()
78, jig feed requirements to achieve continuous, uniform and stable. ()
79, as long as the contact angle is not zero, it is possible to mineral flotation. ()
Third, multiple-choice questions
1, Preparation of gravity is the role of the media used () .
A, transmitting the energy of B, a loose swarm C, transport of materials D, above are D
2, can increase the suspension stability of the method ().
A, increasing the degree of increased plasmid B, increase the quality of selected high-density C, increase the quality of volume concentration increase D, decrease slime and clay C
3, jigging medium is used ().
A, air B, water, C, heavy liquid D, magnetic Iron ore fines suspension B
4, Dense Medium Separation medium is used ().
A, air B, water, C, heavy liquid D, magnetic Iron ore fines suspension D
5, flotation medium is used ().
A, air B, water, C, heavy liquid D , magnetite powder suspension B
6, HR washability curves include () curve.
A, 3 B, 4 C, 5 D, 6 C
7 , shaking Coal is () method.
A, gravity Preparation B, floating Preparation C, filter D, broken election A
8, the phenomenon of mud on the Preparation of ().
A, non-profit B, harmless C, enabling D, hazardous ; D
9, low-sulfur coal is the sulfur content should be (.)
A, ; 2.5% A
10, screening experimental data on the error in the inspection order of the two indicators (.)
A, moisture and ash B, ash and sulfur C, weight and sulfur D, weight and ash ; D
11, drifting in the collation of experimental data for error checking of the two indicators (.)
A, moisture and ash B, ash and sulfur C, weight and sulfur D, weight and ash ; D
12, if the separation density decrease, the optional nature of the curve may be that (.)
A, clean coal yield decreased B, the yield dropped gangue C, ash content increased D, higher ash waste rock ; A
13, optional method of coal classification based on () Coal Development Act as a standard.
A, Dense Medium Separation B, jigging C, flotation D, filter B
14, the jig Xichuo occurred in the jig cycle ().
A, increased pre-B, increased post-C, decreased pre-D, late fall ; D
15, screen, the screen side of the air chamber jig main difference is that (.)
A, different valve B, the capacity of different C, different positions, the air chamber D, nesting different institutions ; C
16, valve adjustment is not characteristic curve ().
A, slide valve B, rotary air valve C, NC air valve D, above are ; A
17, the following models are air-type side of the screen jig is ().
A, LTC B, LTX C, Bada Ke D, B + C A
18, imperfect expression of the degree formula (.)
A,
timberland boots, E = 1 / 2 (δ75-δ25) B,
timberland uk, I = E / (δР -1)
C, η = r/r1 * 100% ; D, Cz = Cj + Cg B
19,
cheap timberland boots, the jig shape using mesh sieve ( ) less prone to clogging.
A, circle B,
timberland outlet, the square C, rectangular D, inverted cone D
20, with () may change without stopping for coal with no board regulation.
A, slide valve B, rotary air valve C, NC air valve D, A + B + C C
21, the production of the jig if detected from the whole bed off the whole, the signs of the bed is () .
A, Loose B, slow moving C, real tight D, empty song C
22, if the production of the jig bed to detect the upper loose and dispersed, the lower part of hard and compact, the signs of the bed is (.)
A, Loose B, slow moving C, real tight D, empty song A
23, in the production process, compared with the second paragraph of the first paragraph of the jig ().
A, wind small water small B, the flood of small wind C, wind flood of small D, large flood wind ; D
24, using () nesting under certain conditions, organizations can automatically balance the nesting volume.
A, impeller B, fan-shaped valve-type C, trunk pipe D, float valve type ; C
25, constant pressure water tank from the height of the jig is (.)
A, 5m B, 10m C, 15m D, 20m ; B
26, the current coal preparation plant coal machine is commonly used ().
A, impeller type coal machine B, electric vibrating feeder C, plate feeder D, reciprocating feeder B
27, the maximum size of coal preparation sorting method is ().
A, jigging B, flotation C, Dense Medium Separation D, shaker PREPARATION ; C
28, the end of heavy medium cyclone coal requirements of magnetite content in the class size should be less than 0.028mm ( .)
A,> 30% B,> 50% C,> 70% D, 90% ; D
29, 300-50mm sorting the lump should be used ().
A, LTX-14 B, LTG-15 C, JL-18A D, JL25A ; D
30, made Φ600-type heavy medium cyclone feed of the ceiling should be (.)
A, 40mm B, 50mm C, 60mm D, 80mm ; B
31, the following four different coal rank coal floatability is the best (.)
A, anthracite B, Jiao Lian C, gas coal D, lean coal B
32, in order to improve the surface hydrophobicity of coal particles, you can choose ().
A, kerosene B, gasoline C, octanol D, polyacrylamide ; A
33, in order to improve the flexibility of the bubble, you can select ().
A, kerosene B, gasoline C, octanol D, polyacrylamide ; C
34, different floatability of coal of different composition, where () may be floating the worst.
A, Vitrinite B, bright coal C, dark coal-D, wire carbon D
35, the umbrella group for the stator impeller line ()-type flotation machine.
A, XJM-4 B, XJM-8 C, XJM-8 D, FXM-8 ; A
36, using the dual pressure Density Meter is a suspension it should be placed in () in the determination.
A, qualified medium bucket B, heavy medium separator C, dilute media drum D, the circulating medium barrel ; B
37, floating and sinking experiments are generally in use () and water in the preparation of the heavy liquid.
A, zinc chloride B, magnetite powder C, carbon tetrachloride,
timberland kids, D, PP amide A
38, the flotation of coal with different grain size at different speeds, where () speed of the flotation fast.
A ,160-200 mesh B, less than 200 mesh C ,120-160 mesh D, greater than 60 mesh ; A
39, currently in production use () is used to clarify the operation of coal flotation.
A, octanol B, kerosene C, light diesel D, polyacrylamide D
40, the dewatering equipment used in flotation process is (.)
A, filter B, centrifuges C, vacuum filter D,
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