阅读说明：本技术 一种自动控制精矿质量的选矿离心机 (Automatic ore dressing centrifuge of control concentrate quality ) 是由 罗先伟 姚茂文 郭业东 韦新彦 全柏飞 霍锡晓 刘燕 于 2019-07-31 设计创作，主要内容包括：本发明公开了一种自动控制精矿质量的选矿离心机,品位分析仪安装在机架内部,位于精矿斗与排矿分矿器之间,品位分析仪通过电线连接自动控制系统,自动控制系统通过电线连接自动调节器,自动调节器通过电线连接控制电动阀门。本发明解决了目前离心选矿机精矿质量控制差、精矿质量不稳定的问题,经过分析调节控制漂洗水的电动阀门的开度,离心选矿机转鼓内的矿浆得到合理漂洗水水量的冲洗,精矿的品位就会保证在设定的范围内,从而满足销售质量要求,达到利益最大化,具有反应速度快、结构牢固、操作简便、自动控制精矿质量的优点。(The invention discloses a mineral separation centrifugal machine capable of automatically controlling the quality of concentrate, wherein a grade analyzer is arranged in a rack and positioned between a concentrate hopper and a discharge mineral separator, the grade analyzer is connected with an automatic control system through a wire, the automatic control system is connected with an automatic regulator through a wire, and the automatic regulator is connected with and controls an electric valve through a wire. The invention solves the problems of poor quality control and unstable quality of the concentrate of the existing centrifugal separator, the ore pulp in the rotary drum of the centrifugal separator is washed by reasonable rinsing water amount through analyzing and adjusting the opening degree of the electric valve for controlling the rinsing water, and the grade of the concentrate can be ensured in a set range, thereby meeting the requirement of sale quality, achieving the maximum benefit, and having the advantages of high reaction speed, firm structure, simple and convenient operation and automatic control of the quality of the concentrate.)

1. The utility model provides an automatic ore dressing centrifuge of control concentrate quality, includes frame (1), rotary drum (2), towards ore deposit device (4), gives ore deposit device (3), ore discharge and divides ore deposit ware (7), concentrate fill (9), center pin (10), its characterized in that: the central shaft (10) is rotatably arranged on the rack (1) through bearing connection, the rotary drum (2) is fixedly arranged on the central shaft (10), a discharge port of the ore feeding device (3) extends into an inner cavity of the rotary drum (2), one ends of the ore flushing device (4) and the rinsing water pipe (6) are arranged on the rack (1), the other ends of the ore flushing device and the rinsing water pipe all extend into the inner cavity of the rotary drum (2), electric valves (5) are respectively arranged at water inlet parts of the ore flushing device (4) and the rinsing water pipe (6), the ore discharging separator (7) is arranged in the rack (1), the ore discharging separator (7) can rotate relative to the rack (1), the ore discharging separator (7) is positioned below the opening side of the rotary drum (2), the concentrate hopper (9) is fixedly arranged in the rack (1) and positioned below the ore discharging separator (7), the left side and the right side of the horizontal concentrate hopper (9) are divided into two parts, one part is used for receiving tailings and the other part is used for, the grade analyzer (8) is arranged in the rack (1), and the grade analyzer (8) is positioned between the concentrate hopper (9) and the ore discharge separator (7); the automatic grade analyzer is characterized by further comprising an automatic regulator (11) and an automatic control system (12), the grade analyzer (8) is connected with the automatic control system (12) through an electric wire, the automatic control system (12) is connected with the automatic regulator (11) through an electric wire, and the automatic regulator (11) is connected with and controls the electric valve (5) through an electric wire.

2. A mineral processing centrifuge for automatically controlling the quality of a concentrate according to claim 1, characterized in that: the automatic control system (12) consists of a programmable controller, a touch screen and a peripheral circuit.

3. A mineral processing centrifuge for automatically controlling the quality of a concentrate according to claim 1, characterized in that: an electric valve (5) arranged on a water inlet pipe of the rinsing water pipe (6) is normally opened, and the opening degree of the electric valve is controlled by an automatic regulator (11).

Technical Field

The invention relates to the technical field of mineral processing equipment, in particular to a centrifugal machine for mineral processing.

Background

The cassiterite has high specific gravity but is crisp, and is easy to be crushed in the process of mining and mineral separation to form micro-fine cassiterite, and the cassiterite is difficult to recover by the conventional mineral separation method and is finally lost in tailings of the mineral separation process, so that the waste of cassiterite resources is caused. The sorting and recycling of the micro-fine cassiterite is one of the technical problems in the field of mineral separation.

At present, the dressing recovery of the superfine cassiterite adopts a dressing centrifuge to recover the cassiterite. The main working part of the centrifugal separator is a rotary drum which is supported on a bracket and is driven by a motor in a belt transmission mode to rotate at a certain rotating speed. The ore pulp is sent to the inner wall depth of the rotary drum through the ore feeding nozzle by the ore feeding separator. The ore pulp rotates along with the rotary drum, and under the action of centrifugal force, minerals begin to be sorted. The heavy mineral deposits on the inner wall of the rotary drum and rotates along with the rotary drum, the light mineral particles in the ore pulp rotate along with the rotary drum at a certain differential speed, the light mineral particles are washed by rinsing water all the time in the rotating process, the rinsing water carries the light mineral particles to flow from the ore feeding end to the ore discharging end along the gradient direction of the rotary drum, and the light mineral particles are discharged from the tail end through the ore discharging separator to obtain the tailings. After a certain time of sorting, the feeding ore separator automatically turns to the position for discharging the concentrate, and feeding of the ore into the rotary drum is stopped. After the tailings are discharged, the ore discharging separator automatically rotates away from the original normal position to prepare for intercepting concentrate, then the high-pressure flushing water valve is automatically opened, the concentrate deposited on the inner wall of the rotary drum is flushed down by the high-pressure flushing water, and the high-pressure water valve is automatically closed after the concentrate is flushed. After the concentrate is discharged, the ore discharging separator and the ore feeding separator automatically reset to start the next separation cycle.

Many auxiliary mechanisms of the centrifugal concentrator mainly comprise a plurality of main parts such as a feeding device, an ore discharging device, a washing water device, rinsing water and an operation program control device of the feeding device, the ore discharging device, the washing water device, the rinsing water and the operation program control device. The main working part of the centrifugal separator is a truncated cone-shaped rotary drum, the half cone angle is 3-5 degrees, the rotary drum is fixed on a horizontal shaft by means of a support, and the rotary drum is driven to rotate by a motor through a triangle belt.

At present, the concentrate quality of a centrifugal separator is difficult to accurately guarantee. The quality of the ore concentrate is judged and adjusted mainly by an operator after elutriating the ore concentrate, if the quality of the ore concentrate is low, the rinsing water of the centrifugal machine is enlarged, the ore pulp is washed by the larger rinsing water in the centrifugal machine, ore particles with light specific gravity are elutriated more, and ore particles with high specific gravity are left, so the grade of the ore concentrate is improved. The reverse is true. And (4) elutriating the concentrate once by an operator at regular intervals, and adjusting the rinsing water quantity according to the elutriation result to ensure that the quality of the concentrate is in a specified range. The quality of tin concentrate is affected by the influence of the components of ore feeding pulp, the proficiency of operators and the responsibility of the operators, so that the quality of the tin concentrate is uneven, the vertical variation range is large, and the influence on product sale of enterprises and the economic benefit are large.

In the mineral separation production, the grade analyzer is applied to the flotation operation, and is only used for rapidly detecting the grade of each element of ore pulp on line, and then an operator adjusts the flotation according to detected data, wherein the adjustment is manual adjustment and non-automatic adjustment. The grade analyzer is not applied to automatic adjustment of the concentrate grade of the centrifugal separator, so that the quality of the concentrate can reach the standard.

In recent years, the domestic patent database discloses the technical reports of similar ore dressing centrifuges:

[ application No. ] ZL2018107186828, [ name ] mineral processing centrifuge is adopted to ore deposit, [ publication No. ] CN108787186A, discloses that a mineral processing centrifuge is adopted to ore deposit, including the bearing platform, the lower fixed surface of bearing platform installs damping spring, the inboard of centrifuge bowl shell is provided with inhales the sound cotton, the one end fixed mounting of driving plate has the protective cover, the inboard of first pivot is rotated and is connected with electronic hydraulic stem, the preceding fixed surface of centrifuge bowl shell installs SE300 control panel, nevertheless because the device can't be to the automatically regulated of concentrate grade, there is the unstable problem of concentrate quality.

Disclosure of Invention

The invention provides a mineral separation centrifugal machine which has the advantages of high reaction speed, firm structure, simplicity and convenience in operation and capability of automatically controlling the quality of concentrate, and solves the problems of poor concentrate quality control and unstable concentrate quality of the conventional centrifugal mineral separation machine.

The invention provides a mineral separation centrifugal machine capable of automatically controlling the quality of concentrate, which comprises a rack, a rotary drum, a mineral flushing device, a mineral feeding device, a mineral discharging and separating device, a concentrate hopper and a central shaft, wherein the central shaft is connected and rotatably arranged on the rack through a bearing, the rotary drum is fixedly arranged on the central shaft, a discharge port of the mineral feeding device extends into an inner cavity of the rotary drum, one end of the mineral flushing device and one end of a rinsing water pipe are arranged on the rack, the other end of the mineral flushing device and the other end of the rinsing water pipe both extend into the inner cavity of the rotary drum, electric valves are respectively arranged at water inlet pipe parts of the mineral flushing device and the rinsing water pipe, the mineral discharging and separating device is arranged in the rack, the mineral discharging and separating device can rotate relative to the rack, the mineral discharging and separating device is positioned below the opening side of the rotary drum, the concentrate hopper is fixedly arranged in, the grade analyzer is arranged in the rack and is positioned between the concentrate hopper and the ore discharge separator; the grade analyzer is connected with the automatic control system through an electric wire, the automatic control system is connected with the automatic regulator through an electric wire, and the automatic regulator is connected with the electric valve through an electric wire.

The automatic control system consists of a programmable controller, a touch screen and a peripheral circuit. The electric valve installed on the water inlet pipe of the rinsing water pipe is normally opened, and the opening degree of the electric valve is controlled by an automatic regulator.

The invention installs a grade analyzer at the concentrate outlet of the centrifugal separator, the grade analyzer monitors the concentrate grade when the concentrate is discharged according to the specified time, and transmits the monitoring data to the automatic control system. The automatic control system outputs an electric signal to the automatic regulator of the electric valve after analysis. The automatic regulator regulates and controls the opening of the electric valve of the rinsing water according to the electric signal, the ore pulp in the rotary drum of the centrifugal concentrator obtains the washing of the reasonable rinsing water quantity, the grade of the concentrate is guaranteed in the set range, thereby meeting the sales quality requirement, achieving the maximum benefit, solving the problems of poor concentrate quality control and unstable concentrate quality of the existing centrifugal concentrator, and having the advantages of high reaction speed, firm structure, simple and convenient operation and automatic concentrate quality control.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic diagram of the working process of the present invention.

Wherein: the system comprises a machine frame 1, a rotary drum 2, an ore feeding device 3, an ore flushing device 4, an electric valve 5, a rinsing water pipe 6, an ore discharging and separating device 7, a grade analyzer 8, a concentrate hopper 9, a central shaft 10, an automatic regulator 11 and an automatic control system 12.

Detailed Description

The invention is further illustrated by the following specific figures and examples.

As shown in figure 1, the invention mainly comprises a frame 1, a rotary drum 2, an ore flushing device 4, an ore feeding device 3, an ore discharging and separating device 7, a concentrate hopper 9 and a central shaft 10, wherein the central shaft 10 is rotatably installed on the frame 1 through bearing connection, the rotary drum 2 is fixedly installed on the central shaft 10, a discharge port of the ore feeding device 3 extends into an inner cavity of the rotary drum 2, one ends of the ore flushing device 4 and a rinsing water pipe 6 are installed on the frame 1, the other ends of the ore flushing device 4 and the rinsing water pipe 6 extend into the inner cavity of the rotary drum 2, electric valves 5 are installed at water inlet parts of the ore flushing device 4 and the rinsing water pipe 6, the ore discharging and separating device 7 is installed inside the frame 1, the ore discharging and separating device 7 can rotate relative to the frame 1, the ore discharging and separating device 7 is positioned below the opening side of the rotary drum 2, the concentrate hopper 9 is fixedly installed inside the frame 1 and below the ore discharging and separating device 7, the left side and the, the grade analyzer 8 is arranged inside the frame 1, and the grade analyzer 8 is positioned between the concentrate bucket 9 and the ore discharge separator 7; the automatic grade analyzer comprises a grade analyzer 8, an automatic regulator 11, an automatic control system 12, a grade analyzer 12, an automatic control system 12, an electric wire 11, an electric wire 5, an electric wire 12, a programmable controller, a touch screen and a peripheral circuit, wherein the automatic regulator 11 is connected with the automatic control system 12 through the electric wire, the electric wire 5 is normally opened on a water inlet pipe of a rinsing water pipe 6, and the opening degree of the electric wire is controlled by the automatic control system 11.

As shown in fig. 2, the operation sets the time interval monitored by the grade analyzer (8). External power is input into the rotary drum 2 through a central shaft 10, the rotary drum 2 of the centrifugal concentrator rotates at a certain rotating speed, ore pulp is sent to the deep part of the inner wall of the rotary drum 2 of the centrifugal separator through an ore feeding pipe in an ore feeding device 3, the ore pulp rotates along with the rotary drum 2, an electric gate 5 of a rinsing water pipe 6 is partially normally open, rinsing water is sprayed out from the rinsing water pipe 6 to wash the ore pulp on the inner wall of the rotary drum 2 in a reverse direction, under the action of centrifugal force, under the action of the reverse flushing force of the rinsing water, minerals start to be separated, heavy minerals are deposited on the inner wall of the rotary drum 2 and rotate along with the rotary drum 2, light mineral particles in the minerals rotate along with the rotary drum 2 at a certain speed, and flow from a feeding point to an ore discharging end along the gradient direction of the rotary drum 2 at a certain spiral angle during rotation, and are discharged to one side, used for receiving tailings, of the left side and, the tailings are formed, after a certain period of time of separation, the feeding device 3 operates to stop feeding the ore into the rotary drum 2, after a set period of time, the tailings are discharged, the ore discharging separator 7 automatically rotates away from the original normal position and rotates to one side, used for receiving the concentrate, of the left side and the right side of the horizontal position of the concentrate hopper 9, then the electric valve 5 arranged at the water inlet pipe of the ore flushing device 4 is automatically opened, the concentrate deposited on the inner wall of the rotary drum 2 is flushed down by high-pressure flushing water, the concentrate flows out of the rotary drum 2 along with water flow, is discharged to one side, used for receiving the concentrate, of the left side and the right side of the horizontal position of the concentrate hopper 9 through the ore discharging separator 7 and then flows to the concentrate pool, the electric valve 5 arranged at the water inlet pipe of the ore flushing device 4 is automatically closed after the concentrate is flushed, and the ore discharging separator 7 and the feeding device are automatically reset in sequence.

In the ore dressing process, the concentrate grade analyzer arranged between the concentrate hopper 9 and the ore discharge separator 7 detects concentrate at regular intervals when the concentrate is discharged, and the detected result is transmitted to the automatic control system 12. The automatic control system 12 outputs an electric signal to the automatic regulator 11 through analysis, the automatic regulator 11 controls the electric valve 5 installed on the rinsing water pipe 6, and the electric valve 5 adjusts the opening degree according to the electric signal to regulate the rinsing water amount to a proper water amount. The ore pulp in the rotary drum 2 is washed by reasonable rinsing water, the centrifugal force generated by the rotation of the rotary drum 2 is obtained, and light and heavy ore particles are reasonably sorted, so that the quality of the concentrate is ensured to be in a specified range.