CN203432616U - An apparatus for detecting load parameters of a ball mill - Google Patents

Abstract

The utility model relates to a load parameter detection device of a ball mill, which belongs to the field of automatic detection. Including frame, ball mill cylinder, electrode, position sensor for collecting electrode position information, load cell, rotary encoder and used for processing and computer, ball mill cylinder is suspended and fixed on the frame and weighed by load cell, ball mill The bottom of the cylinder is equipped with electrodes, and the position sensor and rotary encoder are fixed at the bottom of the frame. The signals collected by the position sensor and rotary encoder are transmitted to the computer through the DI module, and the resistance value between the electrode and the ball mill cylinder is collected. The signal is transmitted to the computer through the resistance A/D module, wireless transmitter and wireless receiver, and the weight signal of the ball mill cylinder collected by the load cell is transmitted to the computer. Not only can the filling rate, loading capacity and ball-to-material ratio of the load body in the barrel of the ball mill be detected simultaneously, but also has strong adaptability and is easy to realize.

Description

A ball mill load parameter detection device

technical field

The utility model relates to a load parameter detection device of a ball mill, which belongs to the field of automatic detection.

Background technique

Ball mills are widely used in mining, metallurgy, chemical industry, building materials, electric power, ceramics and other industries, especially in the beneficiation process of mines. Wet ball mill is the most commonly used crushing equipment in mineral processing industry. The internal load body of the wet ball mill is composed of steel balls, materials and water. The filling rate refers to the ratio of the space occupied by the load body inside the ball mill cylinder. The ball-to-material ratio refers to the ratio of the mass of steel balls loaded inside the ball mill cylinder to the material mass. The filling rate and the ball-to-material ratio are the two most important indicators to reflect the load of the ball mill. Important parameter, directly related to crushing efficiency. Practice has shown that keeping the ball mill running at a reasonable filling rate and ball-to-material ratio can not only greatly increase the processing capacity of the ball mill, reduce the consumption of unit processing capacity, but also play a very important role in improving the production indicators of the entire concentrator .

Traditional single-factor load parameter detection methods mainly include: current method, acoustic method, useful power method, vibration method, etc. Although these methods are simple and easy to implement, due to the limitation of the detection principle, they can only indirectly reflect the single load parameter of the ball mill, and cannot accurately detect the load parameter of the ball mill in the whole process alone.

Considering the advantages and disadvantages of a single detection method, two or three complementary detection methods are combined to detect load parameters, and the sound-power double signal detection method, sound-vibration double signal detection method, sound- Power-vibration three-signal detection method and other multi-factor detection methods. These methods are very complicated to calculate, have poor adaptability, and are easily affected by factors such as grinding concentration, material particle size, material hardness, and steel ball size.

The force sensor method is a technical method that uses a force sensor to directly measure the force related to the load of the ball mill to detect the load parameters of the ball mill. At present, there are mainly liner pressure detection method, cylinder stress detection method, cylinder weighing detection method, etc. The liner pressure detection method is to install a sensor capable of measuring radial pressure and tangential pressure under the inner liner of the ball mill cylinder, and the measurement signal is introduced into the computer for processing to obtain a force map, from which the detachment of the load body of the ball mill can be judged Angle and contact angle, from which the filling rate of the ball mill can be calculated, and then the radial pressure can be analyzed to calculate the ball-to-material ratio. The weighing method can accurately detect the loading capacity of the ball mill, with few affected factors and strong adaptability, but it cannot detect the filling rate and ball-to-material ratio.

Judging from related reports, the existing ball mill load parameter detection methods are more or less deficient, some factors cannot be accurately detected, some calculations are too complicated or the conditions are harsh and difficult to apply, and some detection parameters are not very accurate. Comprehensive, difficult to apply to the optimal control of ball mills.

Contents of the invention

In order to overcome the shortcomings of the existing ball mill load parameter detection method, such as low detection accuracy, overly complicated calculation, and incomplete detection parameters, the present invention provides a ball mill load parameter detection device, which can not only simultaneously detect the filling of the load body in the ball mill barrel rate, loading capacity and ball-to-material ratio, and has strong adaptability and is easy to realize.

The structure of ball mill load parameter detecting device of the present invention: as shown in Figure 1, comprise frame, ball mill barrel 1, electrode, the position sensor 13 of collecting electrode position information, weighing sensor, collect ball mill barrel 1 cylinder rotating speed Rotary encoder 14 and computer 20 for processing and calculating load parameters, ball mill cylinder 1 is suspended and fixed on the frame and weighed by a load cell, electrodes are installed on the bottom of ball mill cylinder 1, position sensor 13 and rotary encoder The sensor 14 is fixed at the bottom of the frame, the signal collected by the position sensor 13 and the rotary encoder 14 is transmitted to the computer 20 through the DI module 16, and the resistance value signal collected by the electrode and between the ball mill barrel 1 is passed through the resistance A/D module 11. The wireless transmitter 12 and the wireless receiver 19 transmit to the computer 20, and the weight signal of the ball mill cylinder collected by the load cell is transmitted to the computer 20.

There are at least three electrodes, which are installed at the front end, the middle and the rear end of the bottom of the ball mill cylinder 1, and the connecting line of the installed positions is parallel to the axis of the ball mill cylinder 1. As shown in FIG. 1 , the front electrode 8 , the middle electrode 9 and the rear electrode 10 .

The electrode is bolt-shaped, with a metal wire 24 in the middle and a hard insulating material 22 around it. The electrode passes through the installation hole of the lining plate and is fixed on the lining plate 21 and the cylinder 1 by fastening nuts 23 .

The front hollow shaft 2 and the rear hollow shaft 3 of the ball mill cylinder 1 are respectively fixed on the front base 4 and the rear base 5 of the frame to keep the ball mill cylinder 1 suspended, and the front base 4 is equipped with a front load cell Group 6, 7 groups of rear end load cells are installed on the rear base 5.

The front end load cell group 6 is connected to the front frame weighing transmitter 17, the rear end load cell group 7 is connected to the rear frame weighing transmitter 15, the front frame weighing transmitter 17 and the rear frame The weighing transmitter 15 transmits the amplified and conditioned signal to the computer 20 through the AI module 18 .

The basic detection principle of the present invention is: install electrodes at both ends and the middle of the barrel of the ball mill to measure the resistance between the barrel and each electrode, and analyze the graph of the relationship between the electrode position angle and the electrode resistance value to obtain the ball mill. The detachment angle and contact angle of the load body in the cylinder can be input into the mathematical model to calculate the filling rate of the load body. A rotary encoder is installed on the cylinder to measure the rotation speed of the ball mill cylinder, and the position of the electrode is determined by the rotation speed. Load cells are installed on the bases at both ends of the ball mill to measure the weight of the ball mill cylinder. The weight of the load body (loading capacity) can be obtained by subtracting the empty weight from the total weight. Filling rate, loading capacity, steel ball density , ore density, and pulp concentration are input into the mathematical model for calculating the ball-to-material ratio, and the ball-to-material ratio of the load body can be obtained.

The beneficial effect of the present invention is that it can accurately detect the loading rate parameters of the ball mill in real time, such as the loading rate and the ball-to-material ratio, and is easy to implement and has strong adaptability. It plays an important role in reducing energy consumption. At present, the current method, acoustic method, vibration method, or the combination of these methods used to detect the load parameters of the ball mill cannot simultaneously detect the three parameters of filling rate, loading capacity, and ball-to-material ratio, and can only detect the three parameters. One or two parameters is an indirect detection method, which is easily affected by factors such as ore properties, pulp concentration, power grid fluctuations, and environmental conditions. Not only is the detection accuracy poor, but it cannot be accurately measured during the entire detection process. However, the present invention is not affected by factors such as ore properties, pulp concentration, environmental conditions, etc., belongs to a direct detection method, and can realize accurate detection in the whole detection process.

Description of drawings

Fig. 1 is a structural principle diagram of the detection system of the present invention.

In the figure: 1-ball mill barrel, 2-front hollow shaft, 3-rear hollow shaft, 4-front base, 5-rear base, 6-front load cell group, 7-rear end load cell group, 8-front electrode, 9-middle electrode, 10-rear electrode, 11-resistor A/D module, 12-wireless transmitter, 13-position sensor, 14-rotary encoder, 15-rear frame weighing transmitter Device, 16-DI module, 17-front frame weighing transmitter, 18-AI module, 19-wireless receiver, 20-computer, 21-liner, 22-hard insulating material, 23-fastening nut , 24-metal wire, 25-load body.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described further.

Embodiment 1: As shown in Figure 1, the structure of the ball mill load parameter detection device of the present invention includes a frame, a ball mill cylinder 1, an electrode, a position sensor 13 for collecting electrode position information, a load cell, and a ball mill cylinder for collecting 1 cylinder Rotary encoder 14 for body speed and computer 20 for processing and calculating load parameters. Ball mill cylinder 1 is suspended and fixed on the frame and weighed by a load cell. Electrodes are installed at the bottom of ball mill cylinder 1. Position sensor 13 and the rotary encoder 14 are fixed at the bottom of the frame, the signals collected by the position sensor 13 and the rotary encoder 14 are transmitted to the computer 20 through the DI module 16, and the resistance value signal collected by the electrode and the ball mill barrel 1 is passed through the resistor A The /D module 11 , the wireless transmitter 12 and the wireless receiver 19 transmit to the computer 20 , and the weight signal of the ball mill cylinder collected by the load cell is transmitted to the computer 20 . There are at least three electrodes, which are respectively installed at the front end, the middle and the rear end of the bottom of the ball mill barrel 1, and the connecting line of the installed positions is parallel to the axis of the ball mill barrel 1. As shown in FIG. 1 , the front electrode 8 , the middle electrode 9 and the rear electrode 10 . The front hollow shaft 2 and the rear hollow shaft 3 of the ball mill cylinder 1 are respectively fixed on the front base 4 and the rear base 5 of the frame to keep the ball mill cylinder 1 suspended, and the front base 4 is equipped with a front load cell group 6 , 7 groups of rear end load cells are installed on the rear base 5. The front load cell group 6 is connected to the weighing transmitter 17 of the front frame, the rear load cell group 7 is connected to the weighing transmitter 15 of the rear frame, and the weighing transmitter 17 of the front frame and the weighing transmitter of the rear frame are connected. The transmitter 15 transmits the amplified and conditioned signal to the computer 20 through the AI module 18 .

Embodiment 2: As shown in Figure 1, the structure of the ball mill load parameter detection device of the present invention includes a frame, a ball mill cylinder 1, an electrode, a position sensor 13 for collecting electrode position information, a weighing sensor, and a ball mill cylinder for collecting 1 cylinder Rotary encoder 14 for body speed and computer 20 for processing and calculating load parameters. Ball mill cylinder 1 is suspended and fixed on the frame and weighed by a load cell. Electrodes are installed at the bottom of ball mill cylinder 1. Position sensor 13 and the rotary encoder 14 are fixed at the bottom of the frame, the signals collected by the position sensor 13 and the rotary encoder 14 are transmitted to the computer 20 through the DI module 16, and the resistance value signal collected by the electrode and the ball mill barrel 1 is passed through the resistor A The /D module 11 , the wireless transmitter 12 and the wireless receiver 19 transmit to the computer 20 , and the weight signal of the ball mill cylinder collected by the load cell is transmitted to the computer 20 . There are at least five electrodes, which are installed at the front, middle and rear ends of the bottom of the ball mill cylinder 1, and the connecting lines of the installed positions are parallel to the axis of the ball mill cylinder 1. As shown in FIG. 1 , the front electrode 8 , the middle electrode 9 and the rear electrode 10 . The electrode is a bolt type, with a metal wire 24 in the middle and a hard insulating material 22 around it. After the electrode passes through the installation hole of the lining plate, it is fixed on the lining plate 21 and the cylinder 1 by the fastening nut 23 . The front hollow shaft 2 and the rear hollow shaft 3 of the ball mill cylinder 1 are respectively fixed on the front base 4 and the rear base 5 of the frame to keep the ball mill cylinder 1 suspended, and the front base 4 is equipped with a front load cell group 6 , 7 groups of rear end load cells are installed on the rear base 5. The front load cell group 6 is connected to the weighing transmitter 17 of the front frame, the rear load cell group 7 is connected to the weighing transmitter 15 of the rear frame, and the weighing transmitter 17 of the front frame and the weighing transmitter of the rear frame are connected. The transmitter 15 transmits the amplified and conditioned signal to the computer 20 through the AI module 18 .

Embodiment 3: As shown in FIG. 1 , the structure of the ball mill load parameter detection device of the present invention includes a frame, a ball mill cylinder 1, an electrode, a position sensor 13 for collecting electrode position information, a weighing sensor, and a ball mill cylinder for collecting 1 cylinder Rotary encoder 14 for body speed and computer 20 for processing and calculating load parameters. Ball mill cylinder 1 is suspended and fixed on the frame and weighed by a load cell. Electrodes are installed at the bottom of ball mill cylinder 1. Position sensor 13 and the rotary encoder 14 are fixed at the bottom of the frame, the signals collected by the position sensor 13 and the rotary encoder 14 are transmitted to the computer 20 through the DI module 16, and the resistance value signal collected by the electrode and the ball mill barrel 1 is passed through the resistor A The /D module 11 , the wireless transmitter 12 and the wireless receiver 19 transmit to the computer 20 , and the weight signal of the ball mill cylinder collected by the load cell is transmitted to the computer 20 . There are six electrodes, which are installed at the front, middle and rear ends of the bottom of the ball mill barrel 1, and the connecting lines of the installation positions are parallel to the axis of the ball mill barrel 1. Front-end electrode 8 , middle electrode 9 and rear-end electrode 10 . The electrode is a bolt type, with a metal wire 24 in the middle and a hard insulating material 22 around it. After the electrode passes through the installation hole of the lining plate, it is fixed on the lining plate 21 and the cylinder 1 by the fastening nut 23 . The front hollow shaft 2 and the rear hollow shaft 3 of the ball mill cylinder 1 are respectively fixed on the front base 4 and the rear base 5 of the frame to keep the ball mill cylinder 1 suspended, and the front base 4 is equipped with a front load cell group 6 , 7 groups of rear end load cells are installed on the rear base 5. The front load cell group 6 is connected to the weighing transmitter 17 of the front frame, the rear load cell group 7 is connected to the weighing transmitter 15 of the rear frame, and the weighing transmitter 17 of the front frame and the weighing transmitter of the rear frame are connected. The transmitter 15 transmits the amplified and conditioned signal to the computer 20 through the AI module 18 .

The specific implementation of the utility model has been described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned implementation. Make various changes below.

Claims (4)

1. A ball mill load parameter detection device, characterized in that the structure includes a frame, a ball mill cylinder (1), an electrode, a position sensor (13) for collecting electrode position information, a weighing sensor, and a ball mill cylinder (1) Rotary encoder (14) for rotational speed and computer (20) for processing and calculating load parameters. Ball mill cylinder (1) is suspended and fixed on the frame and weighed by a load cell. The bottom of ball mill cylinder (1) Electrodes are installed, the position sensor (13) and the rotary encoder (14) are fixed at the bottom of the frame, and the signals collected by the position sensor (13) and the rotary encoder (14) are transmitted to the computer (20) through the DI module (16) ), the resistance value signal collected by the electrode and the ball mill cylinder (1) is transmitted to the computer (20) through the resistance A/D module (11), wireless transmitter (12) and wireless receiver (19), and weighed The weight signal of the cylinder body of the ball mill collected by the sensor is sent to the computer (20). 2. The ball mill load parameter detection device according to claim 1, characterized in that: there are at least three electrodes, which are installed at the front, middle and rear ends of the bottom of the ball mill cylinder (1), and the installation positions are connected with the The axes of the ball mill barrel (1) are parallel. 3. The ball mill load parameter detection device according to claim 1, characterized in that: the front hollow shaft (2) and the rear hollow shaft (3) of the ball mill barrel (1) are respectively fixed on the front base of the frame (4) and the rear base (5) keep the ball mill barrel (1) suspended, the front load cell group (6) is installed on the front base (4), and the rear scale is installed on the rear base (5). Heavy sensor set (7). 4. The ball mill load parameter detection device according to claim 3, characterized in that: the front-end weighing sensor group (6) is connected to the front machine base weighing transmitter (17), and the rear-end weighing sensor group (7 ) to connect the rear base weighing transmitter (15), the front base weighing transmitter (17) and the rear base weighing transmitter (15) to transmit the amplified and conditioned signal to computer (20).

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