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I. Grinding inter-span equipment configuration 1. Grinding-interval grinding-grading unit configuration basic plan (1) Grinding-classifying units are arranged in a row, and the center line of the equipment is perpendicular to the vertical positioning axis of the plant, which is called vertical configuration.
(2) Grinding-grading units are arranged in a row, and the center line of the equipment is parallel to the longitudinal positioning axis of the plant, which is called horizontal configuration.
(3) Grinding-grading units are arranged in double rows and two sections of grinding, and the center line of the equipment is perpendicular to the longitudinal positioning axis of the plant.
(4) Grinding-grading units are arranged in double rows, two sections of grinding, and the center line of the equipment is parallel to the longitudinal positioning axis of the plant.
Scheme 1 is more common in design, and its main advantages are compact and easy to operate and maintain. In the design of the scheme, the two-stage grinding application is more, and the advantage is that the grinding span is smaller than that of the scheme 3. If the first and second sections are classified by the hydrocyclone, the grinding span is smaller than the scheme 3.
2. Basic requirements for equipment configuration of grinding inter-span (1) Grinding-classification unit stress self-flow connection, grading returning sand should avoid mechanical transportation as much as possible. The grouting of different grain size grinding and grading back sand see the following table. The grinding and grading unit connections are shown in the figure below.
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As seen from the above figure, the slope i2 of the return sand flow channel depends on the size of D and C. D depends on the values ​​of a and R. The installation angle a of the classifier is large, which is favorable for the slope i1 of the mill discharge trough, but a allows the adjustment range. Limited, i1 depends on K, H, M, F. B is the distance between the centerline of the returning sand tank and the center line of the classifier. The position of the inlet is allowed to move horizontally along the classifier tank within a certain range, but it must not affect the classification. When the mill and the hydrocyclone constitute a closed circuit, the grit and overflow flow to the next operation must also ensure sufficient self-flow slope. When determining the position and elevation of the cyclone, the product must be self-flowing.
(2) The length of the grinding span should be adapted to the length of the grinding bin and the flotation span to facilitate the feeding.
(3) When installing the weighing scale of the feeding belt conveyor of the mill, the distance between the receiving point and the measuring scale shall not be less than 6~8m, the lifting angle of the tape shall not be more than 20°, and the tape joint shall be glued to reduce the scale of the measuring scale. Impact can guarantee the accuracy of measurement.
(4) Steel balls and steel bars should have ball (bar) bins, equipped with ball buckets and rod-loading machines to ensure the addition and clearing of balls and rods are convenient, and reduce heavy physical labor.
Second, flotation inter-device configuration Flotation machine configuration plan has two forms, one is the vertical positioning axis of the parallel center line of the flotation machine column, said horizontal configuration, gentle slope and flat terrain can be used; one is flotation The longitudinal positioning axis of the vertical vertical building of the machine center line is called vertical configuration. When the number of flotation machines and the number of columns are large, it can be used. The flotation span span and length can be adjusted by adjusting the number of slots in the flotation column and the number of flotation slots, which is beneficial to the graded overflow to the rough selection operation, and the flow through the pipeline is short. When the process is complicated and there are many return jobs, the flotation machine configuration is difficult.
1. Flotation equipment configuration needs to be considered (1) According to the allowable production capacity of the flotation machine (pulp flow), it is convenient for production operation, classifier overflow flow to rough selection to reasonably divide the flotation series. Usually a grinding series for a flotation series, there is also a grinding series for two flotation series or two grinding series for one flotation series. The main advantage of one-to-one is that the production adjustment is convenient, and the overflow flow is facilitated to rough selection; the height difference is saved. The selected collections are often selected in a concentrated manner, and the series is reduced because of the small amount of coarse foam concentrate.
(2) Flotation machine with suction capacity In the same flotation machine column, the number of flotation tanks must be guaranteed to flow from the foam product to the adjacent front working flotation tank. The pressure pipe must reach the gravity gradient as shown in the following figure and the next two tables.
For water cooled chiller, water outlet temperature range could be 0C, -15C, -35C. If large cooling capacity, say above 300kW, we have 2 compressors design to make sure sufficient duty.
This type of water cooled chiller adopts a high-efficiency twin-screw compressor and is equipped with a high-efficiency shell-and-tube heat exchanger independently developed and manufactured, which is suitable for R22, R404A and other refrigerants. Heat recovery can be configured according to customer thermal energy requirements, applicable to pharmaceutical, chemical, electronic and other demanding places. Meanwhile, cooling duty ranges from 70kW to 2369kW with chilled water outlet temperature 5C~-35C.
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