Jigging gold concentrator technology gaolusheng sand mine
1、 Overview
the double bucket diaphragm jig can be divided into two types: left type jig and right type jig. The jig is a fixed sieve. It is suitable for separating metal ores, such as placer ore containing tungsten and gold, tin ore, etc. it can be used for separating fine materials and coarse materials. The maximum feeding particle size is 6-8mm, but in indivial cases, the maximum particle size is 12mm
case site: 2. Structure and instructions for use
lts300 × 450 double bucket diaphragm jig is composed of body, transmission device, water separator, diaphragm and valve plug. The body has two hoppers, each of which is divided into two parts: jigging area and diaphragm area by a bottomless diaphragm. The jigging process is carried out by the agitation of the medium (water) caused by the reciprocating motion of the rubber diaphragm. The motor drives the big leather wheel to rotate through the V-belt, so that the connecting rod on the eccentric shaft moves up and down, and the rocker arm connected with the connecting rod also moves up and down. There are two connecting rods on the rocker arm connected with the rubber diaphragm, so that the diaphragm can get up and down reciprocating motion for jigging
according to the particle size of the ore to be treated, the stroke of the connecting rod can be changed and different strokes can be selected to obtain the best jigging effect. The method of changing the punching times is to replace the small pulley, which can be divided into two punching times: 322 times / min; 420 times / min. There are 11 different strokes (0-25.3 mm) to select the stroke method: loosen the set screw and nut, pull out the locating pin, rotate the relative position between the eccentric adjusting sleeve and the eccentric shaft.
because a sieve is added on the working screen, the jig can be used to deal with materials with uneven particle size Note: This screen may not be supplied according to the order requirements) after the raw ore is fed into the jigging chamber, the ore particles are stratified according to the specific gravity in the medium e to the agitation of the diaphragm; The fine and heavy ore particles settle in the middle and upper layers of the jigger through the gap and sieve hole of the particles in the artificial bed. The coarse and light ore particles (minerals) are washed to the discharge port at the end of the sieve by the medium flow. Because the position of the rear jigging chamber is 50 mm lower than that of the front jigging chamber, the light ore particles overflow into the rear chamber through the tail plate of the front chamber and are subject to jigging again. The position of the tailboard can be adjusted according to the need to control the size of ore discharge. The concentrate in the storage hopper is regularly discharged by the discharge pipe< Main technical data
Proct specifications and technical parameters: name, specifications, number of rooms, area of screening room (M & amp; m); sup2;) Feeding particle size (mm) proction capacity (T / h) stroke (mm) stroke times (times / min) supplementary water quantity (T / h) water pressure (kg / cm & amp; sup2;) Motor weight (kg) model power 100 kW × 150 diaphragm jig 1 0.015 - 3 0.018 - 0.6 - 420 - 1-1.5 y80l-4 0.55 130 300 × 450 double chamber diaphragm jig 2 0.27 - 12 3-6 0-26 322 2-4 1-1.5 y90s-4 1.1 745 1000 × 1000 downward moving cone jig 2 21-5 10-25 0-26 200-350 60-80 0.6-2 y100l-6 1.5 1700 370 × 360 downward moving conical diaphragm jig 2 0.274 6 1-3 5-25 200-250 2-5 - y90s-4 1.1 240 working leather trapezoidal side moving diaphragm jig 3 2.7 - 3 12.5-37.5 13-21 170-230 60-90 2 y90s-4 1.1 2000 670 × 920 jig 2 1.44 4-8 7-10 18-24 240-300 diaphragm jig can be divided into different types according to different standards. For example, according to the installation position of diaphragm, it can be divided into:
(1) side moving diaphragm jig (such as ltp34 / 2 jig) (2) down moving diaphragm jig (such as lta1010 / 2 jig), Jt1070 / 2 jig)
(3) side moving diaphragm jig (such as 2ltc-6109 / 8t jig)
the following are the example pictures of these types of jigs:
1. Side moving diaphragm jig
2. Down moving diaphragm jig
3. Side moving diaphragm jig
sawtooth wave jig specifications and detailed parameters are as follows:
sawtooth wave jig is one of the key equipment of gravity dressing One. It is widely used in gold placer, tin, tungsten, lead, zinc, antimony, manganese, diamond, iron ore and other non-ferrous metallurgical mines and gold dredgers because of its large processing capacity, wide range of particle size, high recovery and good effect. The jt4-2 and jt1.5-2 sawtooth wave large particle jigs in this kind of procts have the maximum feeding particle size of 30mm, and the upper screen and lower screen are used for ore discharge. It is applied to the beneficiation of barite, manganese, iron ore and other ores. It has the advantages of wide particle size range of ore feeding and significantly reced water supply under the screen
most traditional jigs are driven by eccentric circle, and their jigging pulsation curves are mostly sinusoidal. Because the rising and falling water velocity and action time caused by diaphragm motion are basically the same, it is not concive to the loosening of jigging bed and the stratification of ore particles according to specific gravity, thus affecting the separation ratio and recovery rate of the equipment< The sawtooth wave jig is a kind of energy-saving gravity separation equipment developed and improved on the basis of the traditional jig according to the theoretical stratification law of the jig bed. Its jig pulsation curve is sawtooth shape, which makes the rising water flow faster than the falling water flow: the rising time is short and the falling time is long; It overcomes the defects of sine wave and pulsating curve jig that the rising and falling water flow and the action time are the same, enhances the bed looseness, relieves the suction effect, makes the heavy ore particles in the minerals fully settle, and greatly improves the separation capacity and recovery rate of the equipment. Compared with the sine wave jig, it can increase Sn 3.01%, w 5.5%, Pb 1.63%, Zn 2.04% respectively; The water consumption is reced by 30% - 40%, the floor area is reced by 1 / 3, and the stroke can be adjusted. Due to the use of electromagnetic adjusting motor, the stroke can be stepless adjusted. Its performance has reached the advanced level in China, and it is one of the ideal energy-saving gravity separation equipment at present
technical performance table of sawtooth wave jig
practice has proved that gravity separation method is the most ideal, economical and effective method to separate sand gold. Sand gold equipment can be divided into many kinds, such as chute, jig, shaker, etc. these equipment are also gravity separation equipment. Due to the inconvenience of traffic and terrain in some mining areas, large equipment cannot be transported and installed, so small sand gold equipment must be used, This paper introces a kind of small sand gold equipment used in sand gold processing< The lta55 / 2 jig is a kind of small sand gold gravity separation equipment, which belongs to the down moving cone diaphragm concentrator. Its transmission part, jig chamber and diaphragm chamber are located at the lower part of the jig, which has the characteristics of compact structure, small floor area, large treatment capacity and high recovery rate, It is a relatively simple and convenient gold separation equipment to use the small sand gold equipment to treat the heavy sand obtained from sand gold, and then to get gold by mixing mercury.
jigging machine process effect depends on the operation process system to a large extent. The most suitable operation process system should be determined according to the properties of raw materials (particle size and density composition) and the requirements of proct quality. Moreover, the parameters of operation process system are interrelated. Therefore, in the development of operation process system, we must carry out specific analysis according to different situations< The bed state determines the effect of density separation. Therefore, how to make the bed in a state concive to separation is the core of the jig operation process system. For example, in some coal preparation plants with low degree of automation of jigging machine, besides judging the working condition of peach juice machine according to the data provided by rapid floating and sinking and rapid ash content, the jigging machine post operation driver can not only judge the working condition of peach juice machine according to the data provided by rapid floating and sinking and rapid ash content; The hand-held probe rod needs to be inserted into the bed from time to time to test the thickness and tightness of the bed. Even according to the loose type of the bed touched by the probe rod, it is necessary to judge the ratio of water volume and air volume, and then adjust the size of the water valve and air valve. The purpose is to keep the bed in the most suitable working state. The bed state mainly refers to the thickness and tightness of the bed
the thickness of the bed is related to the material properties (density and particle size). If the density difference between light and heavy procts is large, a thinner bed can be used to accelerate the stratification. When processing the raw materials with small density difference, or when high-quality concentrate or high-quality clean coal is required, the bed can be thicker. Generally, the bed is thick, which is stable and easy to operate. However, e to the long time required for loosening, the treatment capacity of the equipment will be reced. For the air pulsating jig used in coal preparation, if the bed is too thick and the air pressure and air volume are insufficient, it is difficult for the bed to reach the required looseness and the stratification effect becomes worse. Thinning the bed can not only accelerate the stratification speed, but also enhance the sipping effect, which is concive to the separation of non graded materials. However, if the bed is too thin, it will result in too strong sipping effect, resulting in the loss of fine clean coal through the screen
the basic thickness of the bed is related to the height of the overflow weir (tailings weir) of the jigging chamber. The working thickness h of jig bed layer is generally determined according to the maximum particle size Dmax of feed, and more empirical values are taken
for coal preparation, for lump coal, H = 5.10 Dmax; For separating fine coal, H = 10.20 Dmax; The bed thickness is generally 400-500mm for separation of non graded coal below 50mm
the looseness of the bed should be determined by experiments. Due to different specific conditions, the requirements for the looseness of the bed are also different. Generally, with the increase of bed looseness, the stratification speed can be accelerated; However, the influence of particle size and shape on the delamination process is also increased. Therefore, the bed looseness should be smaller when separating unclassified or wide size coal, which is generally between 0.4 and 0.55. The coal is classified and selected (mainly refers to lump coal). In order to improve the proctivity of jig, the bed looseness can be appropriately increased, which is generally between 0.5 and 0.55
the speed of horizontal movement of the bed must be compatible with the speed of bed stratification according to density, which determines the speed of separation of layered materials. It can be controlled by adjusting the angle of sieve plate and the amount of wind and water. The horizontal movement speed of each layer in the bed is not consistent. It should be noted that the horizontal movement speed of the gangue layer and the middle coal seam should be adapted to the content of gangue and middle coal in the raw coal, so as to maintain the appropriate thickness of the heavy proct layer in the bed. This is particularly important for the non graded coal, which can not only stabilize the bed, but also facilitate the control of the sipping effect. In addition, the horizontal moving speed of each point along the width and length of the jigging chamber should be basically the same, otherwise, the partial thickness of the bed is uneven, which will inevitably affect the overall stratification effect of the bed< Second, control of feeding
the fluctuation of feeding property and the change of feeding quantity have a direct impact on the technological effect of jig. Therefore, the controlled feeding means that the fluctuation of the change of the properties of the material should be as small as possible, that is, the material for the jig should be homogenized; In addition, the feeding speed should be uniform
for the coal preparation plant, it may separate the raw coal from several mines, or the raw coal from several coal seams whose separation properties are quite different, measures should be taken to realize the homogenization of raw coal, that is, coal blending. This is not only concive to the standardization of user quality index, but also concive to the standardization of raw coal characteristics such as moisture, particle size and gangue content of raw coal selected by coal preparation plant. For jigger, controlling the quality and quantity of feed can ensure the stability of separation process, rece the phenomenon of overload or insufficient load of equipment, improve separation efficiency and rece the loss of coal in gangue. In addition, various coal blending components should be mixed according to a certain proportion, so as to improve the economic benefits
before selection, the feeding property is homogenized and the feeding speed is uniform, which provides a reliable guarantee for the stability of jig bed. Combined with the reasonable wind and water system, the bed will be in the best separation state. Otherwise, if the quality of coal is easy and difficult; When the amount of coal is too much, too little, too short and too short, the jigging process is difficult to operate normally. In addition, the material should be evenly distributed along the feeding width of the jig, otherwise, the bed will be uneven in thickness and loose, which will also affect the separation effect
finally, it should be noted that the raw coal must be wetted in advance with the flushing water supplied by materials. Especially, it is more important when the content of fine coal is high. Otherwise, after the material enters the jigging chamber, the agglomeration phenomenon will appear, and the small group drift will appear on the water layer, which will rece the quality of clean coal< The frequency of jigging and the amplitude of jigging are the number of pulsations per minute; Jigging amplitude refers to the difference between the highest and lowest position of the separation medium pulsating once in jigging chamber. The combination of the two directly affects the bed loose way and loose degree, which is the basic parameter of jig operation process system< For the air pulsating jig, the combined action of air and water directly affects the jig cycle and bed looseness. Therefore, the air volume should be adjusted according to the required bed looseness. The air volume of the first section is larger than that of the second section. The air volume of each chamber in each section decreases from feeding to overflow weir in turn, but sometimes in order to strengthen the sucking effect of the middle chamber in the second section (middle coal section) and strengthen the screening process of fine gangue, the air volume can be appropriately increased compared with other chambers
the water fed into the jig comes from two aspects, one is the flushing water (ore feeding water) fed together with the material, and the other is the screen water (top water) fed continuously or intermittently from under the screen. These two parts of water for the air pulsating jig are finally discharged with light procts through the overflow weir
flushing water (ore feeding water) is mainly used to wet coal or ore in advance for uniform and continuous feeding. Generally, the amount of the water should not be too large, which is limited to wetting all the raw materials at the feeding port. For the coal jig, the flushing volume accounts for about 20% - 30% of the total water volume; For mining jigs, the concentration of feed water is generally less than 20% - 25%
the effect of screen water on the air pulsating jig is mainly to supplement the shortage of screen water, rece the liquid level difference between the jig chamber and the air chamber ring operation, so as to increase the effective pressure of compressed air in the air chamber. The ascending velocity formed by the top water under the screen is very small, about 0.5-1.0 cm / s, and it will not change the maximum velocity of ascending and descending of the pulsating flow obviously. However, because it reces the liquid level difference between jigging chamber and air chamber and increases the pressure effect of compressed air, it makes the pulsating flow start earlier when it rises and end earlier when it falls, so it increases the effect of ascending flow and weakens the effect of descending flow. Increase the amount of pre water under the screen, improve the bed looseness, rece the sipping effect and screen penetration of fine materials. The selected water of air pulsating jig is recycled, and its loss should be supplemented by clean water. In the distribution of the amount of top water under the screen, the first section (gangue section) is smaller than the second section (medium coal section), and the number of compartments is usually reced from the feeding end to the light proct overflow weir
ring the operation of air pulsating jig for coal preparation, the correct combination of air volume and water volume is very important for the separation process index. Although in a certain range, the bed looseness can be improved by increasing the air volume and the top water, but the sipping effect can be strengthened by increasing the air volume, while the sipping effect will be weakened by increasing the top water. Therefore, it can only be used flexibly according to work experience and specific situation in practical operation. Some people think that it is better to use more air than water. This is because increasing the amount of water can rece the loss of clean coal in the gangue, but too much top water will cause a heavy burden on the slime water system of the whole plant, which aggravates the work of slime recovery in the plant< 5. Discharge of heavy procts
when the bed is stratified according to density, the high-density and low-density materials should be discharged out of the machine timely, continuously and reasonably. For the air pulsating jig for separating coal, especially the discharge of heavy procts is an important part in the operation. The discharge speed of heavy procts must be adapted to the bed stratification speed and the horizontal movement speed of gangue (or medium coal) layer. If the discharge speed of heavy procts is too slow and accumulation occurs, it will not only affect the loose condition of the whole bed and make the normal stratification difficult, but also pollute the clean coal and affect the quality of clean coal; Too fast discharge of heavy procts will lead to too thin gangue (or medium coal) layer, or even emptying. The whole bed will become too dry and loose, which will destroy the original separated bed and increase the loss of clean coal in heavy procts< According to the experience of many coal preparation plants, it is better to discharge more heavy procts in the gangue section on the premise that the loss of clean coal in the gangue proct does not exceed the specified index, that is, the amount of gangue discharged should account for 70% - 80% of the total amount of gangue in the feed, which is the so-called "large discharge of gangue". Its purpose is to prevent too much gangue from entering the middle coal section (the second section), so as to create excellent conditions for the second section stratification, not only to ensure the quality of clean coal, but also to improve the yield of clean coal. In general, the discharge rate of gangue with particle size of more than 6 mm is easy to meet the requirements, so we should try every means to solve the discharge problem of gangue with particle size of less than 6 mm, especially for the treatment of non graded coal with particle size of less than 5 o (or 8 o) mm. Compared with coarse-grained gangue, the translation speed of fine-grained gangue less than 6 mm on the sieve plate is smaller, and the sieve hole size of the sieve plate is generally larger than that of coarse-grained gangue. Therefore, this part of heavy procts are mainly discharged through the sieve, so it is very important to pay attention to the coordination of air and water while the coarse-grained gangue is discharged normally. Of course, with the improvement of jig automation, the impact of human factors in heavy proct emissions can be greatly reced
it is very important to set the automatic jigging device correctly when using the automatic jigging machine. The opening height of the vertical gate is about 1.5-2 times of that of the largest gangue, which is easy to cause the loss of clean coal. When the buoy detection device is used, the buoy density should be adjusted correctly, so that the actual density of the buoy is about 0.1-0.15g/cm3 lower than the separation density of the section, and the bulk density is about 0.1-0.15g/cm3 lower than the separation density of the section