CN-122006888-A - Diversion method of Nelson gravity tailings return spiral classifier

CN122006888ACN 122006888 ACN122006888 ACN 122006888ACN-122006888-A

Abstract

The invention discloses a diversion method of a Nelson gravity tailings return spiral classifier, and relates to the technical field of gold ore refining. The method has the advantages that slag with different grain sizes is discharged into three spaces in the water separating tank through the filtration of the filter plates and the diversion of the three diversion pipes, the slag with different grain sizes or solid contents are mixed in proportion after being intercepted in a sectional manner, the ore pulp raw materials with different solid-liquid ratios can be provided for the deposition tank frame, the solid-phase products with different grain grades intercepted in a sectional manner flow to different storage areas, the more optimal utilization can be realized according to the subsequent treatment targets, the ore pulp in the water separating tank is supplemented into the deposition tank frame, the real-time adjustment of the concentration of the ore pulp in the deposition tank frame is realized, the problems of the reduction of classification efficiency, unstable sand return and the fluctuation of the classification grain size caused by the operation of the deposition tank frame under the low concentration working condition can be avoided, and the deposition tank frame can stably work in a proper concentration range for a long time, so that the stability and the continuity of the classification process are improved.

Inventors

GAO JINCHANG
JING WEIHE
ZHAO JIANWEI
WANG YANHUI
CHU ZHIGANG
ZHANG YONGGUI
LI HONGXIN
ZHANG JINPENG
ZHANG MINGYANG
LV XIAOYU
TAO NAN
ZHANG QIAN
HU NAN

Assignees

长春黄金设计院有限公司

Dates

Publication Date: 20260512
Application Date: 20260403

Claims (8)

1. A method of diverting a nielsen gravity tailings return spiral classifier, the method comprising: crushing and grinding raw gold ores to fully separate the ores and form ore pulp meeting the gravity separation condition; Step two, feeding the ore pulp into a Nielsen gravity separation centrifuge for gravity separation, enriching gold-bearing minerals, and separating to obtain Nielsen gravity separation tailing ore pulp; Step three, discharging the Nielsen gravity tailings pulp into a classifier through a pipeline, wherein a flow dividing assembly for classifying, filtering and separately storing the tailings pulp is arranged on the classifier, the flow dividing assembly can supplement the ore pulp containing different coarse and fine particle sizes to a deposition groove frame (2) of the classifier, and the flow dividing assembly is used for classifying and filtering the tailings pulp; step four, using a flow dividing assembly to enable ore pulp containing different particle sizes to be uniformly distributed and temporarily stored; Step five, detecting the concentration of ore pulp in the deposition tank frame (2) through a non-contact ultrasonic densimeter, supplementing the ore pulp with different particle diameters into the deposition tank frame (2) through a flow dividing assembly, and adjusting the concentration of the ore pulp in the spiral classification process; step six, ore pulp entering the deposition groove frame (2) is subjected to classification treatment under the action of a classifier, coarse ore sand returns to an ore grinding process, and fine ore pulp enters a subsequent gold separation or tailing treatment process.
2. The diversion method of the Nelson gravity tailing return spiral classifier is characterized in that the classifier comprises a base frame (1), a sedimentation tank frame (2) is fixedly connected to the top of the base frame (1), a driving module (3) is fixedly connected to the top of the base frame (1), a shaftless auger (4) is fixedly connected to an output shaft of the driving module (3), the shaftless auger (4) is rotatably connected to the inside of the sedimentation tank frame (2), a water outlet (21) is formed in the bottom of one side, close to the driving module (3), of the sedimentation tank frame (2), and the diversion assembly is arranged on the base frame (1); The shunt assembly comprises a fixing frame (51) fixedly connected to a base frame (1), a water diversion tank (52) is fixedly connected to the top of the fixing frame (51), a drain frame (53) is fixedly connected to one side, close to a deposition groove frame (2), of the water diversion tank (52), two partition plates (54) are fixedly connected to the inside of the water diversion tank (52), three motors (55) are fixedly connected to the top of the water diversion tank (52), output shafts of the three motors (55) penetrate into the inside of the water diversion tank (52), spiral stirring rods (56) are fixedly connected to one end, located inside the water diversion tank (52), of the output shafts of the three motors (55), three shunt pipes (515) are fixedly connected to the top of one side, away from the drain frame (53), of the shunt pipes (515) are fixedly connected with drain pipes (516) jointly, two convex frames (517) are fixedly connected to the outer surface, away from one side of the drain pipes (516), and filter plates (518) are inserted into the inner parts of the two convex frames (517).
3. The diversion method of the nielsen gravity tailings return spiral classifier according to claim 2, wherein the base frame (1) is divided into two sections, the first section is obliquely arranged, the second section is horizontally arranged, and the deposition slot frame (2) is positioned at the first section of the base frame (1), namely, the deposition slot frame (2) is in an oblique state.
4. The diversion method of the Nelson gravity tailing return spiral classifier according to claim 3, wherein a water draining frame (53) is communicated with the inside of a water separating tank (52), the bottom of the water draining frame (53) is aligned with the inside of a deposition groove frame (2), one side of the water draining frame (53) away from the water separating tank (52) is fixedly connected with a non-contact ultrasonic densimeter, two partition plates (54) divide the inside space of the water separating tank (52) into three spaces, and three spiral stirring rods (56) respectively correspond to the three spaces inside the water separating tank (52).
5. The diversion method of the nielsen gravity tailings return spiral classifier according to claim 4, wherein three feed inlets are formed in one surface of the diversion tank (52) close to the diversion pipe (515), the three diversion pipes (515) are respectively communicated with three spaces in the diversion tank (52) through the three feed inlets, and the three diversion pipes (515) are sequentially communicated with the drain pipe (516) from top to bottom.
6. The diversion method of the nielsen gravity tailings return spiral classifier according to claim 5, wherein two filter plates (518) are respectively corresponding to two diversion pipes (515) at the top, the two filter plates (518) are different in pore diameter, one filter plate (518) at the top is large in pore diameter, one filter plate (518) at the bottom is small in pore diameter, slag with different sizes is filtered, and the top of a drain pipe (516) is communicated with a slag discharge port of an existing nielsen gravity separator.
7. The diversion method of the nielsen gravity tailings return spiral classifier according to claim 6, wherein the diversion assembly further comprises three lifting grooves (57) arranged at the bottom of one side of the water diversion tank (52) close to the drainage frame (53), the three lifting grooves (57) are respectively communicated with three spaces in the water diversion tank (52), the three lifting grooves (57) are internally and slidably connected with a flow stopping plate (58), the top of the three flow stopping plates (58) is fixedly connected with a connecting plate (59), the top of the drainage frame (53) is fixedly connected with three electric cylinders (510), the output shafts of the three electric cylinders (510) are respectively and fixedly connected with the three connecting plates (59), the bottom of the drainage frame (53) is fixedly connected with a movable frame (531), the electric telescopic rods (532) are respectively and slidably connected with the bottom of the movable frame (531), the movable frame (531) is internally and fixedly connected with a plurality of retarding plates (511), the bottom of the movable frame (531) is fixedly connected with four sleeves (512), the four sleeves (512) are respectively and the four sleeves (512) are fixedly connected with one sleeve (512), a buffer plate (519) is fixedly connected to the bottoms of the four buffer rods (514) together.
8. The diversion method of the nielsen gravity tailings return spiral classifier according to claim 7, wherein three limit grooves corresponding to the positions of the flow stopping plates (58) are formed in the communicating position of the drainage frame (53) and the water diversion tank (52), the plurality of retarding plates (511) are distributed in a staggered mode, the plurality of retarding plates (511) can form an S-shaped shape inside the drainage frame (53), each retarding plate (511) is inclined, and the buffering plates (519) correspond to holes between the drainage frame (53) and the bottommost retarding plate (511).

Description

Diversion method of Nelson gravity tailings return spiral classifier Technical Field The invention relates to the technical field of gold ore refining, in particular to a diversion method of a Nelson gravity tailings return spiral classifier. Background In the existing gold ore dressing process, a process route of crushing, grinding, gravity separation, grading and circulating sand returning is generally adopted, wherein the Neisen gravity separation centrifugal machine has higher recovery efficiency on fine gold and is widely applied to gold ore gravity separation operation. During operation, the Nelson gravity separation centrifuge enriches and discharges high-density gold-containing minerals, and tailings pulp is usually directly discharged or returned to the spiral classifier to participate in subsequent classification and grinding cycles. The spiral classifier realizes size separation by means of solid-liquid ratio and sedimentation difference in ore pulp, and the classifying effect depends on the stability of ore pulp concentration to a great extent. On the existing production line, the tailing pulp flows back to the deposition groove frame of the spiral classifier directly through a pipeline, so that the whole structure is simple, and continuous operation is facilitated. However, there are still significant disadvantages to the prior art in the actual manufacturing process. The tailings pulp discharged by the Nielsen gravity separation has complex particle size composition and large concentration fluctuation, and the concentration of the tailings pulp in the classifier is unstable after the tailings pulp is directly returned to the spiral classifier, so that the tailings pulp cannot be subjected to targeted supplementary adjustment according to the change of working conditions due to the lack of classifying filtration and segmented storage means of the tailings pulp. Disclosure of Invention In order to solve the technical problems, the invention provides a diversion method of a Nelson gravity tailings return spiral classifier. The technical proposal is as follows: a method of diverting a nielsen gravity tailings return spiral classifier comprising: crushing and grinding raw gold ores to fully separate the ores and form ore pulp meeting the gravity separation condition; Step two, feeding the ore pulp into a Nielsen gravity separation centrifuge for gravity separation, enriching gold-bearing minerals, and separating to obtain Nielsen gravity separation tailing ore pulp; Step three, discharging the Nielsen gravity tailings pulp into a classifier through a pipeline, wherein a flow dividing assembly for classifying, filtering and separately storing the tailings pulp is arranged on the classifier, the flow dividing assembly can supplement the tailings pulp with different particle diameters to a deposition groove frame of the classifier, and the flow dividing assembly is used for classifying and filtering the tailings pulp; Step four, using a flow dividing assembly to enable ore pulp with different particle diameters to be uniformly distributed and temporarily stored; step five, detecting the concentration of the ore pulp in the deposition tank frame by a non-contact ultrasonic densimeter, supplementing the ore pulp with different particle diameters into the deposition tank frame by using a flow dividing assembly, and adjusting the concentration of the ore pulp in the spiral classification process; step six, ore pulp entering the deposition groove frame is subjected to classification treatment under the action of a classifier, coarse ore sand returns to an ore grinding process, and fine ore pulp enters a subsequent gold separation or tailing treatment process. The grader comprises a base frame, a deposition tank frame is fixedly connected to the top of the base frame, a driving module is fixedly connected to the top of the base frame, a shaftless auger is fixedly connected to an output shaft of the driving module, the shaftless auger is rotationally connected to the inside of the deposition tank frame, a water outlet is formed in the bottom of one side, close to the driving module, of the deposition tank frame, and a diversion assembly is arranged on the base frame; The water diversion assembly comprises a fixing frame fixedly connected to a base frame, a water diversion tank is fixedly connected to the top of the fixing frame, a drain frame is fixedly connected to one side of the water diversion tank, which is close to a deposition groove frame, two partition plates are fixedly connected to the inside of the water diversion tank, three motors are fixedly connected to the top of the water diversion tank, the output shafts of the three motors penetrate into the inside of the water diversion tank, the output shafts of the three motors are located at one end of the inside of the water diversion tank, a spiral stirring rod is fixedly connected to the top of one side, which is far away from the drain frame, of t