CN100430143C - Semi-automill ball-milling type ore grinding system and its control system - Google Patents
Semi-automill ball-milling type ore grinding system and its control system Download PDFInfo
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Abstract
A semi-automatic grinder-ball grinder system for grinding ore is composed of a vibration feeder, a semi-automatic grinder with variable-speed driver and load monitor, a vibration sieve, a crusher, a sludge pump, cyclone unit with concentration, flow and granularity detections, and a ball grinder with variable-speed driver. Its control method is also disclosed.
Description
(1) technical field
The present invention relates to a kind of ore comminution system and control method thereof.
(2) background technology
From the ore that mining comes out, deliver to the ore dressing plant after, must carry out just carrying out flotation after fragmentation, screening, grind grading reach suitable granularity through the comminution system.Existing comminution system comprises fragmentation, screening, ore grinding, classification, broken and screening is dry operation, and numerous round mass transport belts are arranged, and numerous dust produces point and produces a large amount of dust, big to operating personnel and surrounding environment influence, need to ventilate and gather dust.When running into the big material of clay content height or moisture, very easily cause the crusher chamber and the sieve pore blockade of disintegrating machine, the influence operation.
Because the comminution system feeds the variation of the character (as hardness, clay content, water content etc.) of ore, can make comminution system operating load be in unsteady state, the granularity and the concentration of the circulating load of ball mill, ball mill loop product are suddenly big or suddenly small, change bigger, cause that wear and tear in machines is big, energy consumption is big, and make the utilization rate of equipment and installations of follow-up sorting operation little, quality is unstable; This uneven production status has influenced the steady production that ore grinds system.
(3) summary of the invention
The present invention will provide a kind of Mill control system with the function of semi-automatic ball grinding and its control method, and the resolution system configuration is complicated, and the mass transport belt that comes and goes is numerous, grinding efficiency remains the further problem of raising; Also solve dry operation and produce a large amount of dust, to operating personnel and the big problem of surrounding environment influence; And solve granularity and concentration imbalance that existing ore grinds system's operating load instability, product, wear and tear in machines is big, energy consumption is big, the technical problem of unstable product quality.
Technical scheme of the present invention:
This semi-automill ball-milling type ore grinding system, it is characterized in that: be made up of oscillating feeder, semi-autogenous mill, vibratory sieve, disintegrating machine, mortar pond, slag stock pump, cyclone, ball mill, its annexation is:
(1), between oscillating feeder and semi-autogenous mill, is connected with first ribbon conveyer;
(2), the ore discharge of semi-autogenous mill is given to vibratory sieve, the undersize material of vibratory sieve feeds the sand pump pond, the oversize material of vibratory sieve is given to second ribbon conveyer, feed the charging aperture of disintegrating machine by second ribbon conveyer, the discharge of disintegrating machine is given to the 3rd ribbon conveyer, be given to first ribbon conveyer by the 3rd ribbon conveyer, return semi-autogenous mill again;
(3), the entrance point of slag stock pump connects the sand pump pond, the port of export of slag stock pump is communicated with the charging aperture of cyclone through mineral-feeding pipe;
(4), the underflow of cyclone feeds the charging aperture of ball mill, the overflow of cyclone is given to the flotation operation;
(5), the ball mill discharge feeds the sand pump pond.
Above-mentioned disintegrating machine is gyratory crusher or oppositely rolling roller crusher.
Above-mentioned vibratory sieve is circular shale shaker or drum sieve.
The steel ball pack completeness of above-mentioned semi-autogenous mill is 6%-15%.
The steel ball pack completeness of above-mentioned ball mill is 30%～38%.
The control method of this semi-automill ball-milling type ore grinding system, described semi-automill ball-milling type ore grinding system is made up of oscillating feeder, semi-autogenous mill, vibratory sieve, disintegrating machine, sand pump pond, slag stock pump, cyclone, ball mill, it is characterized in that:
The mine-feeding equipment of semi-autogenous mill-oscillating feeder adopts RHVC, wherein on to the barrow band belt conveyer scale is installed, and its LOAD CELLS and speed sensor signal are through the on-the-spot indication transmitter outputting standard signal of telecommunication metering-in control system of weighing;
Control system compares detected weight and default value for the ore control loop, when the semi-autogenous mill load fluctuates in normal range (NR), by the rotating speed of RHVC adjusting oscillating feeder, realizes the constant ore deposit of giving of semi-autogenous mill;
Simultaneously, on the feed pipe of semi-autogenous mill, flow is installed and takes into account control valve;
The signal of flowmeter is through the on-the-spot indication of flow transmitter outputting standard signal of telecommunication metering-in control system;
Control system determines that according to current mine-supplying quantity the discharge that adds of semi-autogenous mill sets value, system compares detected flow value and setting value, export the valve opening that control signal is regulated feed pipe adjusted valve automatically by the control system flow control circuit, thereby constant ore deposit, the ratio of giving that realizes semi-autogenous mill feeds water;
The semi-autogenous mill system is equipped with the load monitoring device, and adopts speed changing devices; Detect the bearing pressure of semi-autogenous mill base bearing by pressure transmitter, or meanwhile adopt power transducer to monitor the power output of semi-autogenous mill pinion, or adopt electric ear to detect the live load of semi-autogenous mill, detected load signal and default value are compared, when semi-autogenous mill load fluctuation overrun, control system is regulated the rotating speed of semi-autogenous mill automatically according to default value, makes the semi-autogenous mill load restoration normal.
The control method of this semi-automill ball-milling type ore grinding system, described semi-automill ball-milling type ore grinding system is made up of oscillating feeder, semi-autogenous mill, vibratory sieve, disintegrating machine, sand pump pond, slag stock pump, cyclone, ball mill, it is characterized in that:
The slag stock pump adopts the variable frequency adjustment device in the ball mill loop, and the sand pump pond is provided with liquid level gauge, and the mineral-feeding pipe of cyclone is provided with densimeter, flowmeter, and the effluent head of cyclone is provided with particle size analyzer, has concentration analysis simultaneously, and the cyclone inlet is provided with pressure transmitter;
Sand pump pit level meter signal is through fluid level transmitter outputting standard signal of telecommunication metering-in control system, the control system liquid level control loop compares detected liquid level signal and default value, when the sand pump pit level fluctuates in normal range (NR), based on control cyclone pressure;
Pressure transmitter compares detected pressure signal and default value, and pressure control loop is regulated the rotating speed of slag stock pump automatically, and is stable to keep the cyclone inlet pressure, thereby also just controlled the granularity of cyclone overflow product; The cyclone overflow
The fineness of product is detected by particle size analyzer and obtains;
When causing the sand pump pit level too high or too low owing to other reason, control system starting pressure switch control unit, automatically switch to sand pump pit level regulating loop from the cyclone pressure regulation circuit, regulate the rotating speed of slag stock pump automatically, avoid sand pump pond ore pulp to fan the air or excessive; When the sand pump pit level fluctuateed in normal range (NR), control system can be automatically brought to again in the regulating loop that cyclone pressure is the master;
The feed ore concentration control of cyclone mineral-feeding pipe is to realize by the amount of water of regulating the sand pump pond, the signal of densimeter is through consistency transmitter outputting standard signal of telecommunication metering-in control system on the cyclone mineral-feeding pipe, control system concentration control loop compares detected concentration signal and default value, the valve opening of being regulated automatically on the feed pipe by system's output control signal changes amount of water, and the big I of the water yield records by the flowmeter on the feed pipe of sand pump pond; Concentration and flow signal metering-in control system on the cyclone mineral-feeding pipe, system's control cyclone mineral-feeding pipe is given the dried ore deposit amount in ore deposit; Ball mill load monitors according to the grinding machine supply current.
Operation principle of the present invention: after the granularity of the raw ore of exploiting out through being crushed to 0～350mm, send in the semi-autogenous mill, utilize the steel ball of ore self and interpolation to carry out ore grinding.The ore of discharging from semi-autogenous mill is after vibratory sieve or drum sieve classification, coarse fodder returns semi-autogenous mill or disintegrating machine on the sieve, product after the fragmentation is given to semi-autogenous mill or ball mill, sieve fines down feeds the ball milling loop, the ball mill ore discharge is behind cyclone classification, the cyclone sand setting returns ball mill, and the cyclone overflow is given to sorting operation.
Control procedure of the present invention: detect the bearing pressure of semi-autogenous mill base bearing or monitor the power output of semi-autogenous mill pinion simultaneously or the live load that the employing electric ear detects semi-autogenous mill in the semi-automill ball-milling type ore grinding device by pressure detector, the result who detects is delivered to master control system, master control system compares the Signals ﹠ Systems setting value that detects, under the situation of moment of torsion and loading condiction permission, be used for adjusting the mine-supplying quantity of semi-autogenous mill, make semi-autogenous mill loop operating load be in stable state of a control all the time.
Adopt densimeter, flowmeter to measure cyclone feed slurry severe for the ball mill control loop in the device, wait the circulating load of adjusting ball mill by detection ball mill amount of water, pump pond amount of water, supply current, product granularity, cyclone pressure simultaneously, and then control ball mill loop product granularity and concentration, to satisfy the requirement of follow-up sorting operation.By adjusting the aperture of semi-autogenous mill mine-discharging terminal sieve, make two loops in the device be in poised state then, reach the purpose of steady production.
Compared with prior art, the present invention has following beneficial effect:
1, the characteristics of semi-automill ball-milling type ore grinding system, the improvement of ability adaptability
The semi-automill ball-milling type ore grinding device is compared with the domestic conventional fragmentation-ball milling grinding system that generally adopts, frequency conversion mine-feeding equipment and semi-autogenous mill speed-changing driving device have been increased, can adapt to the variation of feed character such as hardness, granularity, clay content, moisture etc. effectively, make whole process system more stable, be easy to control.
2, the improvement of environmental-protecting performance
In the semi-automill ball-milling type ore grinding system, Semi-Autogenous and screening does not have dust to produce point for wet operation, does not need to ventilate and gathers dust, and does not influence surrounding environment yet, and is fit to handle clay content height, material that moisture is big.
3, the improvement of structure
The semi-automill ball-milling type ore grinding system compares with conventional comminution process system, reduced mass transport belt that two sections crushing operations, two step-sizing operations, many circulations come and go and in the dust collecting system of a configuration of respectively gathering dust, whole apparatus structure is greatly simplified, easy operating and management.
4, the semi-automill ball-milling type ore grinding system compares with conventional comminution process system, owing to reduced numerous links, thereby reduced construction area, and saved investment; Reduce intermediary operation and controlling unit, also saved operation cost.
5, the steel ball pack completeness of semi-autogenous mill and ball mill:
The steel ball pack completeness of semi-autogenous mill is 6%～15%, and the steel ball pack completeness of ball mill is 30%～38%.
The control system, variable speed drives control system, vibratory sieve, ball mill control system, cyclone, sand pump and the pipe-line system thereof of semi-autogenous mill, metering, the regulating system that comprise the semi-autogenous mill mine-feeding equipment in the control system of semi-automill ball-milling type ore grinding of the present invention system.Solved the system configuration complexity, round mass transport belt is numerous, grinding efficiency remains the further problem of raising.Also solved dry operation and produced a large amount of dust, to operating personnel and the big problem of surrounding environment influence.And solved existing ore comminution system operating load instability, product granularity and concentration imbalance, wear and tear in machines is big, energy consumption is big, the technical problem of unstable product quality.Have wide adaptability, systematicness is strong, reliability is high, the characteristics of good economy performance.
(4) description of drawings
Fig. 1 is the schematic diagram of semi-automill ball-milling type ore grinding system and control method.
The 1-oscillating feeder, the 2-semi-autogenous mill, 3-first ribbon conveyer, the 4-vibratory sieve, 5-sand pump pond, 6-second ribbon conveyer, the 7-disintegrating machine, 8-the 3rd ribbon conveyer, 9-slag stock pump, the 10-cyclone, the 11-ball mill, 12-control system holding wire, the 13-current signal, the 14-ultrasonic signal, the 15-filler pipe, the 16-water supply valve, the 17-feed pipe, the 18-speed changing devices, 19-variable frequency adjustment device, the 20-overflow pipe, the 21-RHVC, 22-load monitoring device.
(5) specific embodiment
Embodiment, the structure of this semi-automill ball-milling type ore grinding system is formed:
(1), between oscillating feeder 1 and semi-autogenous mill 2, is connected first ribbon conveyer 3;
(2), the sieve lower discharge port of vibratory sieve 4 is communicated with sand pump pond 5, the sieve top discharge mouth of vibratory sieve connects an end of second ribbon conveyer 6, the other end of second ribbon conveyer is connected with the charging aperture of disintegrating machine 7, the discharging opening materials flow of disintegrating machine 7 connects an end of the 3rd ribbon conveyer 8, and the other end of the 3rd ribbon conveyer and first ribbon conveyer 3 intersect;
(3), the entrance point of slag stock pump 9 connects sand pump pond 5, the port of export of slag stock pump 9 is communicated with the charging aperture of cyclone 10 through mineral-feeding pipe;
(4), the materials flow of the lower end discharging opening of cyclone 10 effluent heads leads to the charging aperture of ball mill 11, the effluent head materials flow of cyclone flows to the flotation operation;
(5), sand pump pond 5 is led in ball mill 11 discharge end materials flows.
The automatic detection of this semi-automill ball-milling type ore grinding system and control loop structure are formed:
The mine-feeding equipment of semi-autogenous mill-oscillating feeder adopts RHVC 21, wherein on to the barrow band belt conveyer scale is installed, its LOAD CELLS WE and velocity sensor SE signal are through the on-the-spot indication transmitter WIT outputting standard signal of telecommunication metering-in control system of weighing.Control system compares detected weight and default value for ore control loop WIC, when the semi-autogenous mill load fluctuates in normal range (NR), by regulating oscillating feeder RHVC 21, realizes the constant ore deposit of giving of semi-autogenous mill; Simultaneously, on the feed pipe of semi-autogenous mill, flow is installed and takes into account control valve.The signal FE1 of flowmeter is through the on-the-spot indication of flow transmitter FIT1 outputting standard signal of telecommunication metering-in control system.Control system is according to the technology Calculation formula, calculate the amount of water of semi-autogenous mill in proportion by current mine-supplying quantity, this calculated value is as flow setting value, system sets value comparison therewith with detected flow value, export water supply valve 16 apertures that control signal is regulated feed pipe adjusted valve automatically by control system flow control circuit FICQ1, thereby constant ore deposit, the ratio of giving that realizes semi-autogenous mill feeds water.
The semi-autogenous mill system is equipped with load monitoring device 22, and adopts speed changing devices 18.Detect the bearing pressure of semi-autogenous mill base bearing by pressure transmitter, or meanwhile adopt power transducer to monitor the power output of semi-autogenous mill pinion, or adopt electric ear to detect the live load of semi-autogenous mill, detected load signal and default value are compared, when semi-autogenous mill load fluctuation overrun, control system is regulated the rotating speed of semi-autogenous mill automatically according to default value, makes the semi-autogenous mill load restoration normal.
The control method of this semi-automill ball-milling type ore grinding system, described semi-automill ball-milling type ore grinding system is made up of oscillating feeder, semi-autogenous mill, vibratory sieve, disintegrating machine, sand pump pond, slag stock pump, cyclone, ball mill, it is characterized in that its ball mill control method is:
The slag stock pump adopts variable frequency adjustment device 19 in the ball mill loop, and the sand pump pond is provided with liquid level gauge, and the mineral-feeding pipe of cyclone is provided with densimeter, flowmeter, and the effluent head of cyclone is provided with particle size analyzer, has concentration analysis simultaneously, and the cyclone inlet is provided with pressure transmitter.
Sand pump pit level meter LE signal is through fluid level transmitter LIT outputting standard signal of telecommunication metering-in control system, control system liquid level control loop LICA compares detected liquid level signal and default value, when the sand pump pit level fluctuates in normal range (NR), based on control cyclone pressure.Pressure transmitter PT compares detected pressure signal and default value, and pressure control loop PIC regulates the variable frequency adjustment device 19 of slag stock pump automatically, and is stable to keep the cyclone inlet pressure, thereby also just controlled the granularity of cyclone overflow product.When causing the sand pump pit level too high or too low owing to other reason, control system starting pressure switch control unit PS, automatically switch to sand pump pit level regulating loop LICA from cyclone pressure regulation circuit PIC, regulate the rotating speed of slag stock pump 9 automatically, avoid sand pump pond ore pulp to fan the air or excessive; When the sand pump pit level fluctuateed in normal range (NR), control system can be automatically brought to again in the regulating loop that cyclone pressure is the master.
The feed ore concentration control of cyclone mineral-feeding pipe is to realize by the amount of water of regulating the sand pump pond.The DE signal of densimeter is through consistency transmitter DIT1 outputting standard signal of telecommunication metering-in control system on the cyclone mineral-feeding pipe, control system concentration control loop DIC compares detected concentration signal and default value, water supply valve 16 apertures of being regulated automatically on the feed pipe by system's output control signal change amount of water, and the big I of the water yield records by the flowmeter on the feed pipe of sand pump pond.
In addition, concentration DIT1 and flow FIT3 signal metering-in control system on the cyclone mineral-feeding pipe, system gives the dried ore deposit amount MI in ore deposit according to calculating the cyclone mineral-feeding pipe.
As being equal to replacement, above-mentioned disintegrating machine is gyratory crusher or oppositely rolling roller crusher, and disintegrating machine is used for broken hard rock particle of discharging from semi-autogenous mill.When semi-autogenous mill give the permissible value that ore deposit ore hardness surpasses design the time, because the restriction of ability, Semi-Autogenous chance produces too much hard rock particle, then need to adopt disintegrating machine with the hard rock particle fragmentation, to avoid semi-autogenous mill " tripe rises ", influence the ability and the efficient in Semi-Autogenous loop, also avoid influencing the ability and the efficient in ball mill loop.
As being equal to replacement, vibratory sieve is circular shale shaker or drum sieve.The screen size of circular shale shaker or drum sieve can be determined according to the balancing the load situation of semi-autogenous mill and back ball mill, be beneficial to the power balance in whole Semi-Autogenous ball milling loop.
Semi-autogenous mill, its semi-autogenous mill are to add a spot of steel ball and the ore comminution device that forms by grinding machine, and as embodiment, the steel ball pack completeness of semi-autogenous mill is 6%-15%, and the steel ball pack completeness of ball mill is 30%-38%.
Semi-autogenous mill loop process control method: semi-autogenous mill adopt RHVC to the ore deposit, wherein on to the barrow band, belted electronic balance is installed, semi-autogenous mill adopts speed-changing driving device, the semi-autogenous mill system is equipped with the load monitoring device, detects the bearing pressure of semi-autogenous mill base bearing or adopts power transducer to monitor the power output of semi-autogenous mill pinion or the live load that the employing electric ear detects semi-autogenous mill simultaneously by pressure transmitter.
When the load of semi-autogenous mill in the running was too high or too low, supervising device was delivered to master control system with control signal, according to default value, regulated the rotating speed of semi-autogenous mill by master control system automatically, made the semi-autogenous mill load restoration normal.In the semi-autogenous mill load restoration, control system is regulated the mine-supplying quantity of semi-autogenous mill automatically, adjusts the amount of water of semi-autogenous mill simultaneously in proportion.
Ball mill loop process control method: the ore in sand form pump of giving of cyclone adopts frequency-conversion drive apparatus in the ball mill loop, the mineral-feeding pipe of cyclone is provided with concentration detection, flow measurement, the sand pump pond is provided with liquid level and detects, and the overflow of cyclone is provided with granularity Detection, has concentration analysis simultaneously; The cyclone inlet is provided with pressure transmitter.
When the sand pump pit level fluctuates in normal range (NR), based on control cyclone pressure, regulate the frequency conversion rotating speed of sand pump automatically, stable to keep the cyclone inlet pressure, thus also just controlled the granularity of cyclone overflow product.When causing cyclone sand pump pit level too high or too low owing to other reason, switch to pump pit level regulating loop from the cyclone pressure regulation circuit automatically, regulate the rotating speed that cyclone is given the ore in sand form pump automatically, avoid sand pump pond ore pulp to fan the air or excessive; When the sand pump pit level fluctuateed in normal range (NR), control system can be automatically brought to again in the regulating loop that cyclone pressure is the master.The control of the feed ore concentration of cyclone mineral-feeding pipe is to realize by the amount of water that control system is regulated the sand pump pond automatically.
Claims (7)
1. semi-automill ball-milling type ore grinding system, it is characterized in that: be made up of oscillating feeder, semi-autogenous mill, vibratory sieve, disintegrating machine, sand pump pond, slag stock pump, cyclone, ball mill, its annexation is:
(1), between oscillating feeder and semi-autogenous mill, is connected with first ribbon conveyer;
(2), the ore discharge of semi-autogenous mill is given to vibratory sieve, the undersize material of vibratory sieve feeds the sand pump pond, the oversize material of vibratory sieve is given to second ribbon conveyer, feed the charging aperture of disintegrating machine by second ribbon conveyer, the discharge of disintegrating machine is given to the 3rd ribbon conveyer, be given to first ribbon conveyer by the 3rd ribbon conveyer, return semi-autogenous mill again;
(3), the entrance point of slag stock pump connects the sand pump pond, the port of export of slag stock pump is communicated with the charging aperture of cyclone through mineral-feeding pipe;
(4), the underflow of cyclone feeds the charging aperture of ball mill, the overflow of cyclone is given to the flotation operation;
(5), the ball mill discharge feeds the sand pump pond.
2. according to the semi-automill ball-milling type ore grinding system of claim 1, it is characterized in that: described disintegrating machine is gyratory crusher or oppositely rolling roller crusher.
3. according to the semi-automill ball-milling type ore grinding system of claim 1, it is characterized in that: described vibratory sieve is circular shale shaker or drum sieve.
4. according to the semi-automill ball-milling type ore grinding system of claim 1 or 2 or 3, it is characterized in that; The steel ball pack completeness of described semi-autogenous mill is 6%-15%.
5. according to the semi-automill ball-milling type ore grinding system of claim 1 or 2 or 3, it is characterized in that: the steel ball pack completeness of described ball mill is 30%～38%.
6. the control method of a semi-automill ball-milling type ore grinding system, described semi-automill ball-milling type ore grinding system is made up of oscillating feeder, semi-autogenous mill, vibratory sieve, disintegrating machine, sand pump pond, slag stock pump, cyclone, ball mill, it is characterized in that:
The mine-feeding equipment of semi-autogenous mill-oscillating feeder adopts RHVC, wherein on to the barrow band belt conveyer scale is installed, and its LOAD CELLS and speed sensor signal are through the on-the-spot indication transmitter outputting standard signal of telecommunication metering-in control system of weighing;
Control system compares detected weight and default value for the ore control loop, when the semi-autogenous mill load fluctuates in normal range (NR), by the rotating speed of RHVC adjusting oscillating feeder, realizes the constant ore deposit of giving of semi-autogenous mill;
Simultaneously, on the feed pipe of semi-autogenous mill, flow is installed and takes into account control valve;
The signal of flowmeter is through the on-the-spot indication of flow transmitter outputting standard signal of telecommunication metering-in control system;
Control system determines that according to current mine-supplying quantity the discharge that adds of semi-autogenous mill sets value, system compares detected flow value and setting value, export the valve opening that control signal is regulated feed pipe adjusted valve automatically by the control system flow control circuit, thereby constant ore deposit, the ratio of giving that realizes semi-autogenous mill feeds water;
The semi-autogenous mill system is equipped with the load monitoring device, and adopts speed changing devices; Detect the bearing pressure of semi-autogenous mill base bearing by pressure transmitter, or meanwhile adopt power transducer to monitor the power output of semi-autogenous mill pinion, or adopt electric ear to detect the live load of semi-autogenous mill, detected load signal and default value are compared, when semi-autogenous mill load fluctuation overrun, control system is regulated the rotating speed of semi-autogenous mill automatically according to default value, makes the semi-autogenous mill load restoration normal.
7. the control method of a semi-automill ball-milling type ore grinding system, described semi-automill ball-milling type ore grinding system is made up of oscillating feeder, semi-autogenous mill, vibratory sieve, disintegrating machine, sand pump pond, slag stock pump, cyclone, ball mill, it is characterized in that: the slag stock pump adopts the variable frequency adjustment device in the ball mill loop, the sand pump pond is provided with liquid level gauge, the mineral-feeding pipe of cyclone is provided with densimeter, flowmeter, the effluent head of cyclone is provided with particle size analyzer, have concentration analysis simultaneously, the cyclone inlet is provided with pressure transmitter;
The signal of sand pump pit level meter is through fluid level transmitter outputting standard signal of telecommunication metering-in control system, the control system liquid level control loop compares detected liquid level signal and default value, when the sand pump pit level fluctuates in normal range (NR), based on control cyclone pressure;
Pressure transmitter compares detected pressure signal and default value, and pressure control loop is regulated the rotating speed of slag stock pump automatically, and is stable to keep the cyclone inlet pressure, thereby also just controlled the granularity of cyclone overflow product; The fineness of cyclone overflow product is detected by particle size analyzer and obtains;
When causing the sand pump pit level too high or too low owing to other reason, control system starting pressure switch control unit, automatically switch to sand pump pit level regulating loop from the cyclone pressure regulation circuit, regulate the rotating speed of slag stock pump automatically, avoid sand pump pond ore pulp to fan the air or excessive; When the sand pump pit level fluctuateed in normal range (NR), control system can be automatically brought to again in the regulating loop that cyclone pressure is the master;
The feed ore concentration control of cyclone mineral-feeding pipe is to realize by the amount of water of regulating the sand pump pond, the signal of densimeter is through consistency transmitter outputting standard signal of telecommunication metering-in control system on the cyclone mineral-feeding pipe, control system concentration control loop compares detected concentration signal and default value, the valve opening of being regulated automatically on the feed pipe by system's output control signal changes amount of water, and the big I of the water yield records by the flowmeter on the feed pipe of sand pump pond; Concentration and flow signal metering-in control system on the cyclone mineral-feeding pipe, system's control cyclone mineral-feeding pipe is given the dried ore deposit amount in ore deposit; Ball mill load monitors according to the grinding machine supply current.
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| CN102872958A (en) * | 2012-09-26 | 2013-01-16 | 佛山市博晖机电有限公司 | Grinding process of ceramic raw material and ceramic raw material grinding production line |
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Assignee: MCC Huaye Resources Development Co., Ltd. Assignor: China Enfi Engineering Technology Co., Ltd. Contract fulfillment period: 2009.9.18 to 2019.9.17 contract change Contract record no.: 2009990001223 Denomination of invention: Semi-automill ball-milling type ore grinding system and its control system Granted publication date: 20081105 License type: Exclusive license Record date: 2009.11.4 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.9.18 TO 2019.9.17; CHANGE OF CONTRACT Name of requester: CHINA METALLURGICAL GROUP HUAYE RESOURCE DEVELOPME Effective date: 20091104 |