Main plant equipment configuration (1)
 Relationship between the number of slots of XJ flotation machine and the slope of foam groove on the same slope | |||||||||||
Flotation machine volume / m 3 | Number of flotation machines connected to the same grade foam tank | Suction tube center to groove bottom distance / mm | Foam groove width | ||||||||
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | b/mm | ||
0.13 | 22.1 | 15.8 | 12.3 | 10.1 | 8.5 | 7.3 | 6.5 | 5.8 | 5.3 | 175 | 100 |
0.23 | 22.1 | 15.8 | 12.3 | 10 | 8.5 | 7.3 | 6.5 | 5.8 | 5.2 | 230 | 100~150 |
0.35 | 21.6 | 15.4 | 12 | 9.8 | 8.3 | 7.3 | 6.3 | 5.6 | 5.1 | 243 | 150~200 |
0.62 | 21.5 | 15.4 | 11.9 | 9.8 | 8.3 | 7.3 | 6.3 | 5.6 | 5.1 | 265 | 200~250 |
1.1 | 21.2 | 15.2 | 11.8 | 9.7 | 8.1 | 7.3 | 6.2 | 5.6 | 5 | 365 | 250~300 |
2.8 | 13.7 | 9.8 | 7.6 | 6.2 | 5.2 | 4.5 | 4 | 3.6 | 3.2 | 400 | 300~350 |
5.8 | 11.9 | 8.5 | 6.6 | 5.4 | 4.5 | 4 | 3.5 | 3.1 | 2.8 | 425 | 350~400 |
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Because the elevation of the flotation point of the flotation machine in the same column and the elevation of the ore return pipe in the front working flotation machine are fixed values, that is, the height difference is a fixed value, the longer the stroke to the previous operation, the smaller the slope, so the same The number of flotation machines connected to the slope foam tank should not be too large. In order to prevent "short circuit", the number of slots for rough selection and sweeping in the same column should not be too small. For the flotation machine of the type without suction property, the same is generally not less than 8 tanks, and the problem of "short circuit" should be considered for the extra large flotation machine. (US) "beneficiation plant design" advocates non-large-scale concentrator may consider using a large rougher flotation machine, sweeping chosen small flotation machine, flotation machine allows large economic benefits inherent utilized. The large-scale flotation machine with a volume of 28~56m 3 is only suitable for rough selection of large-scale concentrators with a daily processing capacity of 50kt ore. If the concentrating plant below 50h adopts this specification, the number of flotation machines is too small, so it is necessary to consider preventing Short circuit" and ensure operational flexibility; 14m 3 volume flotation machine is suitable for daily processing 25~50kt ore concentrator; 2.8m 3 volume flotation machine will be limited to daily processing concentrator below 10kt; small flotation machine can only Used for selected jobs.
(3) The number of flotation grooves or the total length of each column arranged in parallel with each other should be equal. The total length should include the required size of the agitation tank, foam pump, etc., which is conducive to neat configuration, convenient operation and operation, and the plant area can be utilized.
(4) When it is difficult to achieve full self-flow, the stress contends for the main ore flow, and the sand pump is used less. If several intermediate products have the same return point, these intermediate products should be put together and sent by the same sand pump. When the flotation machines that do not self-prime the slurry are arranged in a row, the foam products are fed to the same working front flotation machine, and the foam pump is used for lifting, and the tailings flow into the same row of subsequent operations, and the flotation unit adjacent to the operation is Step configuration, step height difference of 300mm is conducive to the tailings flow to the subsequent operation flotation tank. At present, there is also a flotation machine with suction capacity as a suction tank (such as SF flotation machine) and JJF flotation machine combined unit, no foam pump is installed, SF flotation machine is placed in each operation without floating capacity. The first slot of the machine is arranged horizontally between jobs.
(5) Flotation machine configuration must be easy to operate, maintain and manage, with the possibility of changing the adjustment of the slurry circuit and the possibility of shifting other parallel series of a certain series, a certain operation equipment, the average assignment task of the operation equipment or series exchange; The flotation machine of the configuration should have its foam tanks facing each other. The outer baffle of the foam tank should be higher than the operating platform by 300~800mm. The operation platform of the extra large flotation machine should be provided with railings at the end of the platform above the tank. The operation of the flotation machine should have good natural lighting and sufficient illumination to facilitate the observation of the foam phenomenon.
(6) The position of the drug delivery station should be suitable. Generally, large-scale flotation plants mostly adopt centralized or local centralized drug delivery methods. The drug delivery station is typically placed on one or several inter-span floors. The agent flows through the pipeline to the adding place, and the slope of the pipeline should not be less than 3%. The pipeline erection must not hinder the inspection and lifting of the flotation machine, and the dry chemical addition is usually added by using the scattered in situ. Small flotation plants often use a dispersing drug delivery station, and the platform elevation must ensure the self-flow of the drug. [next]
2. Configuration example The flotation machine in the figure below is in the horizontal configuration. The grinding and grading units are longitudinally arranged. The number of flotation series and the number of grinding systems are one to one. The round grinding bin is separated from the grinding cross. It can be seen from the figure that the flotation machine foam tanks are juxtaposed. Due to the small amount of foam concentrate, it is concentrated in a selected series of treatments. Due to the small number of tanks selected, the small size and the effective use of the plant area, it is set in a single small span with a span of 4m and a length of 24m. In order to install the weighing scale for the grinding belt conveyor, the grinding bin has a certain distance from the grinding span. The drug delivery station adopts a centralized method, and the medicine preparation stirring tank is arranged on the 8.10m platform in the flotation span. The stirring barrel is very close to the drug delivery table, which is convenient for pipeline installation and self-flow, and the elevation of the drug delivery station ensures the self-flow of the medicine to the adding place. The electric hoist crane beam is fixed at the elevation of 8.10m, and the center of gravity of the orbital flotation machine is directly above. The maintenance site is convenient to transport from the side of the plant to the outside.
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