Gold ore flotation middling regrinding and reselecting treatment system

Abstract

The utility model relates to a gold ore flotation middling regrinding and reselecting treatment system which comprises a classificator III, a scavenging machine I and a scavenging machine II, discharging ports of the classificator III, the scavenging machine I and the scavenging machine II are connected with a feeding port of a slag slurry pool, a discharging port of the slag slurry pool is connected with a feeding port of a hydrocyclone through a slag slurry pump, and a discharging port of the hydrocyclone is connected with a discharging port of a water pump. A sand setting opening of the hydrocyclone is connected with the feeding end of the vertical mill, the discharging end of the vertical mill is connected with a feeding opening of the slurry pool, an overflow opening of the hydrocyclone is connected with a feeding opening of the inclined plate thickener, and a discharging opening of the inclined plate thickener is connected with a feeding opening of the stirring barrel through the conveying pump. A discharging port of the stirring barrel is connected with a feeding port of a middling regrinding roughing machine, and a discharging port of the middling regrinding roughing machine is connected with a middling regrinding scavenging machine. According to the gold ore flotation middling regrinding and reselecting treatment system, through middling regrinding, roughing and scavenging, the problems that gold ore monomers are insufficiently dissolved, and the recovery rate is low are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gold ore flotation, in particular to a gold ore flotation ore regrinding and reselection processing system. Background Art

[0002] In recent years, with the continuous development and utilization of mineral resources, limited mineral resources are becoming increasingly exhausted, and easy-to-process gold mines are decreasing year by year. The reserves of poor ore in the proven gold mines are relatively large, but the gold grade is low, the ore occurrence state is complex, the embedded particle size is fine, the ore dressing is difficult, and the ore dressing recovery rate is difficult to improve. It is imperative to extract gold from low-grade or difficult-to-select ores, in which gold is mainly fine and micro-fine particles coexisting with sulfides such as pyrite or arsenopyrite. The research on this type of ore to maximize resource utilization and economic benefits is the main research direction of my country at this stage.

[0003] At present, the general treatment method of flotation of sulfide gold ore in my country in the traditional flotation process is to return to the previous stage of separation operation in sequence (such as Figure 3 As shown in the figure, the monomer dissociation of the middling ore is generally insufficient, and the useful minerals in the middling ore cannot be effectively recovered. Most of them are lost in the tailings, resulting in a waste of gold resources. In response to these problems, after years of field exploration and industrial test research, a gold flotation middling regrinding and re-selection process was proposed (as shown in the figure). Figure 2 as shown) and its processing system (as Figure 1 As shown in the figure, the flotation recovery of fine and micro-fine gold co-existing with sulfides such as pyrite or arsenopyrite can be maximized, thereby increasing the overall concentrate grade and recovery rate of gold. Utility Model Content

[0004] The utility model provides a gold ore flotation ore regrinding and reselection processing system.

[0005] The specific technical scheme of the utility model is: a gold ore flotation ore regrinding and reselection processing system, comprising a concentrator III, a scavenger I and a scavenger II, the concentrator III, the scavenger I and the scavenger II discharge ports are connected to the slurry pool feed port, the slurry pool discharge port is connected to the hydrocyclone feed port through a slurry pump, the hydrocyclone sand settling port is connected to the vertical mill feed end, the vertical mill discharge end is connected to the slurry pool feed port, the hydrocyclone overflow port is connected to the inclined plate thickener feed port, the inclined plate thickener discharge port is connected to the mixing barrel feed port through a conveying pump, the mixing barrel discharge port is connected to the medium ore regrinding rougher feed port, and the medium ore regrinding rougher discharge port is connected to the medium ore regrinding scavenger.

[0006] Furthermore, preferably, the hydrocyclone has a diameter of 150 mm.

[0007] The beneficial effects of the utility model are as follows: the present application adds a gold ore flotation middling regrinding and reselection processing system to the existing gold ore flotation process system, through which the middling ore is regrinded to make its monomers more fully dissociated, and then the flotation effect is improved through roughing and scavenging, thereby improving the total concentrate grade and recovery rate of gold, which has a positive significance for the flotation effect of fine and micro-fine sulfide-symbiotic gold that is difficult to recover. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is an equipment association diagram of a gold ore flotation ore regrinding and reselection processing system of the utility model;

[0009] Figure 2 It is a flow chart of a gold ore flotation ore regrinding and re-selection process in the embodiment;

[0010] Figure 3 This is a flow chart of the existing gold flotation process;

[0011] In the figure: 1-concentrator III, 2-scavenger I, 3-scavenger II, 4-slurry pool, 5-slurry pump, 6-hydrocyclone, 7-vertical mill, 8-inclined plate thickener, 9-transport pump, 10-mixing barrel, 11-ore regrinding rougher, 12-medium ore regrinding scavenger. DETAILED DESCRIPTION

[0012] In order to make the technical problems and technical solutions solved by the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0013] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0014] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0015] like Figure 1 As shown, the present application adds a gold ore flotation middling regrinding and reselection processing system to the existing gold ore flotation process system, and the system is used to solve the problem of insufficient monomer dissociation and low recovery rate of middling ore in the flotation process. The medium ore regrinding and reselection processing system comprises a concentrator III1, a scavenger I2 and a scavenger II3. The discharge ports of the concentrator III1, the scavenger I2 and the scavenger II3 are connected to the feed port of the slurry pool 4. The discharge port of the slurry pool 4 is connected to the feed port of the hydrocyclone 6 through a slurry pump 5. The sand settling port of the hydrocyclone 6 is connected to the feed end of the vertical mill 7. The discharge end of the vertical mill 7 is connected to the feed port of the slurry pool 4. The overflow port of the hydrocyclone 6 is connected to the feed port of the inclined plate thickener 8. The discharge port of the inclined plate thickener 8 is connected to the feed port of the mixing barrel 10 through a conveying pump 9. The discharge port of the mixing barrel 10 is connected to the feed port of the medium ore regrinding rougher 11. The discharge port of the medium ore regrinding rougher 11 is connected to the medium ore regrinding scavenger 12.

[0016] Working principle:

[0017] The tailings of the concentrator III1, the foam of the scavenger I2 and the foam of the scavenger II3 are introduced into the slurry pool 4 for mixing, and then the mixed slurry is pumped into the hydrocyclone 6 for classification through the slurry pump 5. The sand settling part of the hydrocyclone 6 enters the vertical mill 7 for re-grinding of the intermediate ore, and after being ground to -400 mesh and reaching 92%, it is returned to the slurry pool for circulation. The overflow part of the hydrocyclone 6 enters the inclined plate thickener 8 for concentration, and the concentrated slurry is pumped into the mixing barrel 10 by the delivery pump 9. The overflow water of the inclined plate thickener 8 enters the return water for return utilization.

[0018] At this time, add activator copper sulfate 5.5g / t, collector MA 2g / t and foaming agent 2# oil 2g / t into the mixing barrel 10, stir to make the reagents and the slurry fully mixed, and then let the slurry in the mixing barrel 10 flow by gravity into the medium ore regrinding rougher 11 for roughing, and the foam from the regrinding roughing enters the concentrator IV in the existing process flow, and the tailings from the regrinding roughing directly enter the regrinding scavenging machine 12 for scavenging.

[0019] Collector MA 2g / t and foaming agent 2# oil 1g / t are added to the regrinding scavenging machine 12. After the regrinding scavenging foam is sorted, it is returned to the regrinding roughing machine 11 for further sorting. The regrinding scavenging tailings are combined with the tailings of the scavenging machine II and discharged directly.

[0020] Application:

[0021] In order to prove the flotation effect of the above gold ore flotation ore grinding and re-selection treatment system, the following comparative tests were conducted:

[0022]

[0023] Based on the annual ore processing volume of a single gold mine of 420,000 t / a, the annual gold output of the existing gold flotation process is 420,000 t × 2.21 g / t × 85.01% = 789.04 kg.

[0024] After adding the middling regrinding and re-selection process, the annual gold output increased by 420,000t×2.21 g / t×(85.98%-85.01%)=9.04kg.

[0025] It can be seen that the middling regrinding and re-selection process of the present application significantly improves the gold concentrate grade and ore dressing recovery rate.

[0026] The present invention is described in detail above through specific and preferred embodiments, but those skilled in the art should understand that the present invention is not limited to the embodiments described above, and any modifications, equivalent substitutions, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gold ore flotation ore regrinding and re-selection processing system, comprising a concentrator III (1), a scavenger I (2) and a scavenger II (3), characterized in that: The discharge ports of the concentrator III (1), the scavenger I (2) and the scavenger II (3) are connected to the feed port of the slurry pool (4); the discharge port of the slurry pool (4) is connected to the feed port of the hydrocyclone (6) through a slurry pump (5); the sand settling port of the hydrocyclone (6) is connected to the feed end of the vertical mill (7); the discharge end of the vertical mill (7) is connected to the feed port of the slurry pool (4); the overflow port of the hydrocyclone (6) is connected to the feed port of the inclined plate thickener (8); the discharge port of the inclined plate thickener (8) is connected to the feed port of the stirring barrel (10) through a conveying pump (9); the discharge port of the stirring barrel (10) is connected to the feed port of the medium ore regrinding roughing machine (11); the discharge port of the medium ore regrinding roughing machine (11) is connected to the medium ore regrinding scavenger (12).

2. A gold ore flotation ore grinding and re-selection processing system according to claim 1, characterized in that: The diameter of the hydrocyclone (6) is 150 mm.

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