Efficient ore unloading chute of wet-type preselector of dressing plant
By designing curved arc-shaped ore unloading chutes and matching angles of ore unloading water pipes, the problem of poor ore unloading effect of wet preselected machines is solved, the speed of concentrate and unloading water is improved, and the processing volume of the ball mill and iron essence powder are increased. Yield.
Patent Information
- Application Number
- CN202323418991.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-15
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2033-12-15
AI Technical Summary
Under the conditions of limited installation location and fixed water pressure, the unloading effect of the wet preselectrator is poor, resulting in a decrease in the grinding concentration and affecting the production of iron fine powder.
Design a curved arc-shaped ore unloading chute with a circular arc of 0.78 and an angle of 40-50 degrees at the inlet end. Increase the angle of the ore unloading water pipe to match the curved shape of the arc-shaped chute and improve the flow of the ore unloading water. Speed and efficiency of concentrate entering the ball mill.
The concentrate unloading speed and unloading water speed are improved, the amount of unloading water is reduced, the processing volume of the ball mill and the iron fine powder production are increased, and the grinding effect is ensured.
Smart Images
Figure CN222306045U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an ore discharging chute for feeding concentrate to a ball mill by a wet pre-selector in a ore dressing plant, and belongs to the technical field of wet pre-selector equipment. Background Art
[0002] Since the selection effect of wet pre-selector is much better than that of dry selection, the application of wet pre-selector in mineral processing plants is becoming more and more common. The concentrate of wet pre-selector passes through the chute and relies on hydraulic action to smoothly enter the ball mill feeder. The general direct unloading chute angle is about 20°. In principle, the larger the unloading angle, the better the unloading effect, and the smaller the water volume and water pressure requirements. However, the unloading angle is affected by the installation position, spatial layout, and equipment structure of the upper and lower process equipment, and cannot be increased infinitely; on the contrary, the smaller the unloading angle, the worse the unloading effect, and the higher the water volume and water pressure requirements. Excessive use of unloading water will reduce the grinding concentration and affect the grinding effect. Under the conditions of limited installation space and fixed unloading water pressure, how to ensure the mill efficiency and grinding effect, the unloading effect of the pre-selector is crucial.
[0003] The current pre-selector uses a direct discharge chute with an inclination angle of about 20°. Due to the limitation of the installation position, the chute angle has reached its limit. The pre-selector concentrate falls into the chute and cannot smoothly enter the ball mill feeder. A large amount of high-pressure water must be used for flushing. This situation not only affects the efficiency of the ball mill, but also reduces the grinding concentration, ultimately affecting the output of iron ore concentrate.
[0004] At present, according to the theory of the fastest curve, small balls of the same mass and size fall from two tracks, a straight line and a curve, with the same starting and ending heights. The small balls on the curve track reach the highest speed first and reach the end first. Among the countless curves, there is a fastest curve, also called a cycloid. The small balls that fall through the fastest curve reach the end the fastest. Therefore, the discharge chute of the pre-selector can be designed as a curve shape according to the theory of the fastest curve to increase the flow rate of the unloading water and fine powder in the pre-selector chute, so as to achieve the purpose of improving the unloading effect. Utility Model Content
[0005] The technical problem to be solved by the utility model is to provide a high-efficiency unloading chute of a wet pre-selector in a ore dressing plant, which can increase the speed of unloading water in the chute, drive the concentrate to smoothly enter the ball mill feeder with greater kinetic energy, reduce the amount of unloading water, and ultimately achieve the improvement of the mill efficiency and grinding effect.
[0006] The technical solution to solve the above technical problems is:
[0007] The invention discloses a high-efficiency unloading chute of a wet pre-selector in an ore dressing plant. The unloading chute is a curved arc-shaped unloading chute. The installation height and the starting and ending connection positions of the curved unloading chute remain unchanged. The arc of the curved unloading chute is bent downward. The arc of the curved unloading chute is 0.78. The angle of the unloading water pipe at the water inlet end of the curved unloading chute matches the curved shape of the water inlet end of the curved unloading chute.
[0008] The above-mentioned efficient unloading chute of the wet pre-selector of the ore dressing plant, the unloading water pipe at the water inlet end of the arc-shaped unloading chute is along the curved tangent direction of the water inlet end of the arc-shaped unloading chute, and the angle between the water inlet direction of the unloading water pipe and the horizontal plane is 40-50 degrees.
[0009] The beneficial effects of the utility model are:
[0010] After adopting the utility model, the unloading speed of the concentrate of the pre-selector is improved in two aspects. First, the concentrate itself can obtain a greater moving speed when falling onto the surface of the arc-shaped unloading chute; second, the angle of the unloading water pipe is also increased with the change of the shape of the arc-shaped unloading chute, from 20° to about 50°, which is more conducive to unloading, and the speed of the unloading water in the arc-shaped unloading chute is also improved, so that the concentrate can be driven to smoothly enter the ball mill feeder with greater kinetic energy.
[0011] The utility model has the advantages of simple structure and convenient use. After the concentrate can smoothly and efficiently enter the ball mill feeder, the ball mill feed capacity can be further increased, the pre-selector ore unloading water volume can be reduced, and finally the mill table efficiency and grinding effect can be improved.
[0012] Preliminary calculations show that the processing capacity of the pre-selector can be increased by 10 tons / hour, about 14.29%, after the transformation. The amount of high-pressure unloading water can be reduced, the grinding concentration and grinding effect of the ball mill can be guaranteed, and the output of iron ore concentrate can be increased by 13,000 tons / year. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of an existing ore unloading chute;
[0014] Figure 2 It is a structural schematic diagram of the utility model.
[0015] The markings in the figure are as follows: pre-selector 1, concentrate 2, direct unloading chute 3, unloading water pipe 4, ore feeder 5, arc unloading chute 6. DETAILED DESCRIPTION
[0016] Figure 1 It is shown that after the pre-selector 1 further wet-selects and discards the powder ore, the concentrate 2 slides to the direct unloading chute 3. It can only slide smoothly to the feeder 5 under the action of high-pressure unloading water in the unloading water pipe 4. The unloading effect is poor and the processing capacity of the pre-selector 1 is restricted.
[0017] Figure 2 It is shown that the ore unloading chute is a curved arc-shaped ore unloading chute 6, the installation height and the initial and final connection positions of the curved ore unloading chute 6 remain unchanged, the arc of the curved ore unloading chute 6 is bent downward, the arc of the curved ore unloading chute 6 is 0.78, and the angle of the ore unloading water pipe 4 at the water inlet end of the curved ore unloading chute 6 matches the curved shape of the water inlet end of the curved ore unloading chute 6.
[0018] Figure 2 It is shown that the unloading water pipe 4 at the water inlet end of the arc-shaped unloading chute 6 is along the curved tangent direction of the water inlet end of the arc-shaped unloading chute 6, and the angle between the water inlet direction of the unloading water pipe 4 and the horizontal plane is 40-50 degrees.
[0019] The concentrate 2 flows faster in the arc-shaped unloading chute 6, the angle of the unloading water pipe 4 is increased to 50°, the water flow flushing effect is improved, and the slurry mixed with the high-pressure unloading water can smoothly and efficiently slide into the feeder 5. Preliminary calculations show that the processing capacity of the pre-selector 1 can be increased by 10t / h, about 14.29%, after the transformation, the amount of high-pressure unloading water can be reduced, the grinding concentration and grinding effect of the ball mill are guaranteed, and the output of iron ore concentrate can be increased by 13,000 tons / year.
[0020] An embodiment of the present utility model is as follows:
[0021] The length of the arc-shaped ore-discharging chute 6 is 3500 mm, the width is 325 mm, and the arc angle is 0.78.
Claims
1. An efficient unloading chute of a wet pre-selector in a ore dressing plant, characterized by: The ore unloading chute is a curved arc-shaped ore unloading chute (6), the installation height and the starting and ending connection positions of the curved ore unloading chute (6) remain unchanged, the arc of the curved ore unloading chute (6) is curved downward, the arc of the curved ore unloading chute (6) is 0.78, and the angle of the ore unloading water pipe (4) at the water inlet end of the curved ore unloading chute (6) matches the curved shape of the water inlet end of the curved ore unloading chute (6); The unloading water pipe (4) at the water inlet end of the arc-shaped unloading chute (6) is along the tangent direction of the bend of the water inlet end of the arc-shaped unloading chute (6), and the angle between the water inlet direction of the unloading water pipe (4) and the horizontal plane is 40-50 degrees.