WO2019215487A1 - Sistema y metodo para la reduccion de contaminacion ambiental en un punto de transferencia de materiales - Google Patents
Sistema y metodo para la reduccion de contaminacion ambiental en un punto de transferencia de materiales Download PDFInfo
- Publication number
- WO2019215487A1 WO2019215487A1 PCT/IB2018/059563 IB2018059563W WO2019215487A1 WO 2019215487 A1 WO2019215487 A1 WO 2019215487A1 IB 2018059563 W IB2018059563 W IB 2018059563W WO 2019215487 A1 WO2019215487 A1 WO 2019215487A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- chute
- flow
- belt
- output
- input
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G13/00—Weighing apparatus with automatic feed or discharge for weighing-out batches of material
- G01G13/02—Means for automatically loading weigh pans or other receptacles, e.g. disposable containers, under control of the weighing mechanism
- G01G13/04—Means for automatically loading weigh pans or other receptacles, e.g. disposable containers, under control of the weighing mechanism involving dribble-feed means controlled by the weighing mechanism to top up the receptacle to the target weight
- G01G13/10—Means for automatically loading weigh pans or other receptacles, e.g. disposable containers, under control of the weighing mechanism involving dribble-feed means controlled by the weighing mechanism to top up the receptacle to the target weight wherein the main feed is effected by pneumatic conveying means, e.g. by fluidised feed of granular material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/02—Devices for feeding articles or materials to conveyors
- B65G47/16—Devices for feeding articles or materials to conveyors for feeding materials in bulk
- B65G47/18—Arrangements or applications of hoppers or chutes
- B65G47/19—Arrangements or applications of hoppers or chutes having means for controlling material flow, e.g. to prevent overloading
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/34—Devices for discharging articles or materials from conveyor
- B65G47/44—Arrangements or applications of hoppers or chutes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/52—Devices for transferring articles or materials between conveyors i.e. discharging or feeding devices
- B65G47/72—Devices for transferring articles or materials between conveyors i.e. discharging or feeding devices transferring materials in bulk from one conveyor to several conveyors, or vice versa
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/18—Preventing escape of dust
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G11/00—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers
- G01G11/08—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers having means for controlling the rate of feed or discharge
- G01G11/10—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers having means for controlling the rate of feed or discharge by controlling the height of the material on the belt
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G11/00—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers
- G01G11/08—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers having means for controlling the rate of feed or discharge
- G01G11/12—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers having means for controlling the rate of feed or discharge by controlling the speed of the belt
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/02—Feeding devices
Definitions
- This invention relates to apparatus and methods for obtaining a stable filling level condition with live load of material into a chute at a material transfer point FIG. 2 and whose main objective is the reduction of the level of environmental pollution that is currently produced.
- the preferred field of application is mineral processing plants and similar industries where there are material handling operations in which they intervene: a shot; a source of material supply where said source of material supply may be a conveyor belt; and an apparatus that regulates the exit of said material from the chute where said apparatus can be another conveyor belt FIG. one.
- Wetting systems consist of wetting the material so that the finest particles of the material increase their weight, are applicable but in other material handling operations since the transfers of materials between conveyor belts are characterized by generating air currents with dust to the outside of the chute where these systems are not so effective.
- Dust collectors are vacuum cleaners with filters that suck air from the inside of the chute in order to produce a slight vacuum inside and thus prevent contaminated air from going outside the chute.
- apparatus for achieving a stable filling level with live load of material inside the chute senses the level of live load of material inside the chute and senses the material flow of one of the flows, whether the input or output of the chute material, the rate of change of the filling level is calculated of the material inside the chute and with this determines the adjustment that must be made on the flow to be regulated and that can be the input or output of the chute. A condition of stability of the level of filling of the chute is thus obtained.
- a method for achieving a stable filling level with live load of material inside the chute includes the steps of: sensing the level of live load of material inside the chute; the sensing of one of the material flows either the input or the output of the chute; the calculation of the rapidity of change of the level of filling of the chute and with this determines the adjustment that must be made on the flow of input or output of the chute. A condition of stability of the level of filling of the chute is thus obtained.
- FIG. 1 The scheme shows the arrangement of the main parts at a transfer point of conventional material.
- FIG. 2 The scheme shows the arrangement of the main parts at a material transfer point with the invention.
- FIG. 3 The scheme shows the same as what FIG. 2 except that element 12 is this time a servo assisted actuator.
- FIG. 4 This scheme shows an arrangement of conveyor belts in series where the last belt feeds a stock pile.
- FIG. 5 This scheme shows an arrangement of conveyor belts and chute where the material comes from a stock pile and the final belt feeds a machine.
- the following describes the method and devices that intervene distinguishing two different situations, the first one described is when the regulation and control of the level of filling of the chute is carried out through the regulation and control of the flow of material entering the chute and the second is when said level control is carried out through the regulation and control of the flow of material output from the chute.
- LEVEL CONTROL THROUGH INPUT MASSIC FLOW CONTROL This case occurs when the chute outgoing belt feeds a machine FIG. 5, such as a crusher or a mill, in which the output flow of the chute is determined by the treatment capacity of the machine, whereby the level control of the chute must be carried out through regulation and control of the input flow to the chute.
- the material entry belt to the chute must be configured in such a way that it is possible to achieve that the mass flow of said belt is linearly proportional to the speed of said belt, unless there is a pesometer on said belt that allows to know the load per meter of belt that carries said belt.
- the ideal configuration is when the chute input belt where the chute's output belt feeds a machine is when the input belt has a constant belt load per meter which is feasible to be achieved.
- the invention consists in ensuring that the chute contains a certain amount of live load of material in its interior 17 FIG. 2 permanently and that this amount is maximum so as to minimize the height in free fall of the material H 19 inside the chute.
- a system for measuring the weight of the material inside the chute is incorporated into the chute, said system consists of the arrangement of weight sensors 10 of FIG. 2 on the chute support brackets so that the chute weight is supported on said sensors.
- a device called a frequency inverter is incorporated into the motor that drives the material input belt to the chute so as to be able to regulate the speed of the belt Ve in order to regulate the mass flow Me for which in addition a speed sensor to said belt.
- PLC electronic controller
- PID controller which receives the chute weight signal and the material input belt speed signal to the chute and based on an adjusted chute weight value Pp (Set Point) and at an allowable variation range defined by a lower limit Lir and higher Lsr of the range, controls the speed of the belt Ve to control the mass flow of material input to the chute and thus control the level of filling of the chute .
- the input flow Me is obtained from the speed of the input belt Ve and the constant of proportionality Kmve between the mass input flow and the speed of the input belt, whereby:
- the Kmve can be obtained by capacity, that is, a field measurement of the amount of material in a meter of belt, the units of the Kmve are kg / m.
- Another option that can be used for the calculation of the Kmve is the measurement of the speed of the input belt Ve and the measurement of the mass inlet flow Me of material to the chute, which can be measured through stopping for a brief time interval of the material exit belt from the chute whereby the dP / dt is equal to the mass input flow Me, since the dP / dt is equal to the difference between the mass input flow minus the mass flow of output and as in this situation of the stopped output belt the Ms is equal to zero then the dP / dt is equal to the mass input flow Me.
- Another advantage of this procedure is that it allows the operation of the plant to vary the load of the belt either to increase it or to reduce it for the purpose of operating with slower or faster belt speeds respectively, in which case the system of Kmve measurement will detect this condition and calculate its new value.
- Knve is the constant of proportionality between the rpm of the engine Ne and the speed of the input belt Ve of material to the chute, where the constant Knve can be obtained from: the speed signal Ve and the signal of Ne by means of the incorporation of an engine rpm sensor, which:
- chute level control procedure acting on the regulation and control of the incoming mass flow Me, it consists of the following stages:
- Parameter definition Weight programmed to keep constant inside the Pp (Set Point) chute; permissible range of variation with respect to Pp defined by a lower limit Lir and an upper limit Lsr; and time ta for corrections.
- dP / dt, c -DP / ta where ta is a scheduled time for adjustment.
- the level control procedure is repeated.
- level control in this case is done by controlling the output flow of frequency variator equipment for controlling the speed of the Vs belt and a speed sensor of said belt.
- the signal received by the PLC this time is the speed signal of the material output belt and the chute weight signal and control is performed on said belt, notwithstanding that it can also receive the belt speed signal of material input to the chute.
- the mass output flow Ms is obtained from the speed of the output belt Vs and the proportionality constant Kmvs between the mass output flow and the speed of the output belt Vs, whereby:
- the material inflow can be obtained from the relationship:
- the ratio is as follows:
- the Knvs can be obtained in the same way described above.
- Parameter definition Weight programmed to keep constant inside the Pp (Set Point) chute; permissible range of variation with respect to Pp defined by a lower limit Lir and an upper limit Lsr; and time ta for corrections. Receipt of the information of the chute weight P (t) and the speed of the output belt Vs.
- Vs, c Ms, c / Kmvs
- the level control procedure is repeated.
- the preferred field of application is mineral processing plants and similar industries where there are material handling operations in which they intervene: a shot; a source of material supply where said source of material supply may be a conveyor belt; and an apparatus that regulates the exit of said material from the chute where said apparatus can be another conveyor belt FIG. one.
- the main technical problem that it solves refers to the great environmental pollution produced by these material transfer operations partly due to the large height in free fall that runs through the material inside the chute, where said pollution is air with suspended dust that being breathed by people produces diseases of different kinds such as Silicosis, in addition to the problem of contamination there is also the problem of high energy costs, inputs and maintenance of the systems used to mitigate environmental pollution and that Date have not solved the problem satisfactorily.
- the aim of the invention is to provide a method and apparatus that allow the chute to permanently maintain a level of filling with live load of material as high as possible, FIG. 2 so that the material entering the chute falls on material and not on the internal walls of the chute or on the material exit conveyor belt.
- the other problem that is solved with the invention is with regard to the costs of maintenance of chutes linings, of the belt belonging to the conveyor belt of chute material output and pollin stations that are subject to greater wear due to the blows that produces the material in the free fall on said components. And the fact that the material falls on material means that there is almost no wear on the inner linings of the chute and the belt and the pollin stations of the belt located at the bottom of the chute are protected from blows by The fall of material.
- FIG. 1 shows a diagram of a normal "material transfer point", which is basically made up of a final section of a conveyor belt, material input conveyor belt 1 that we will name with the acronym CTE, also consists of an initial section of another conveyor belt, conveyor belt of exit of material 2 that we will call with the acronym CTS, in addition to both belts the system consists of a Chute 3, in addition to other elements such as: a gate 4 located at the exit of the chute material, normally manually operated 12; guards and elements to seal the interior space of the chute with respect to the exterior to it and are normally equipped with a dust collection equipment to mitigate the exit of contaminated air towards the outside of the chute.
- a gate 4 located at the exit of the chute material, normally manually operated 12; guards and elements to seal the interior space of the chute with respect to the exterior to it and are normally equipped with a dust collection equipment to mitigate the exit of contaminated air towards the outside of the chute.
- the material transported by the CTE 1 is poured inside the chute 3 generating a flow of material 5 that falls in free fall to the CTS belt 2, traveling a height H 19, where the CTS belt 2 extracts the material from the chute to transport it to another place, where that other place can be a machine for example a crusher or a stock for example a stock pile or other conveyor belt.
- the physical mechanism that explains the amount of air with suspended dust generated is the amount of potential energy that the material has at the beginning of the fall with respect to the level where it will rest and to the fact that during the fall the material picks up air and which is logical if we consider that the section of the jet remains constant during the fall and as the speed increases means that air enters the interior of the jet proportionally to the speed that it is acquiring during the fall, and when it reaches the ground this air is violently expelled from the material since all the ore load that comes behind acts like a kind of piston.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Conveyors (AREA)
- Auxiliary Methods And Devices For Loading And Unloading (AREA)
- Sampling And Sample Adjustment (AREA)
- Chutes (AREA)
- Feeding Of Articles To Conveyors (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021531549A JP2022517503A (ja) | 2018-12-03 | 2018-12-03 | 材料の移動点での環境汚染を低減するための装置および方法 |
BR112021010771-1A BR112021010771A2 (pt) | 2018-12-03 | 2018-12-03 | Sistema e método para reduzir a poluição ambiental em um ponto de transferência de material |
PCT/IB2018/059563 WO2019215487A1 (es) | 2018-12-03 | 2018-12-03 | Sistema y metodo para la reduccion de contaminacion ambiental en un punto de transferencia de materiales |
PE2021000810A PE20212398A1 (es) | 2018-12-03 | 2018-12-03 | Sistema y metodo para la reduccion de contaminacion ambiental en un punto de transferencia de materiales |
US17/293,271 US20220002095A1 (en) | 2018-12-03 | 2018-12-03 | System and Method for Reducing Environmental Contamination at a Material Transfer Point |
AU2018422478A AU2018422478A1 (en) | 2018-12-03 | 2018-12-03 | System and method for reducing environmental contamination at a material transfer point |
CL2021001282A CL2021001282A1 (es) | 2018-12-03 | 2021-05-17 | Sistema y metodo para la reduccion de contaminacion ambiental en un punto de transferencia de materiales |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB2018/059563 WO2019215487A1 (es) | 2018-12-03 | 2018-12-03 | Sistema y metodo para la reduccion de contaminacion ambiental en un punto de transferencia de materiales |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2019215487A1 true WO2019215487A1 (es) | 2019-11-14 |
WO2019215487A8 WO2019215487A8 (es) | 2021-06-17 |
Family
ID=68468462
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2018/059563 WO2019215487A1 (es) | 2018-12-03 | 2018-12-03 | Sistema y metodo para la reduccion de contaminacion ambiental en un punto de transferencia de materiales |
Country Status (7)
Country | Link |
---|---|
US (1) | US20220002095A1 (es) |
JP (1) | JP2022517503A (es) |
AU (1) | AU2018422478A1 (es) |
BR (1) | BR112021010771A2 (es) |
CL (1) | CL2021001282A1 (es) |
PE (1) | PE20212398A1 (es) |
WO (1) | WO2019215487A1 (es) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111204599A (zh) * | 2020-02-28 | 2020-05-29 | 西北工业大学太仓长三角研究院 | 一种多相综合除尘技术 |
CH718157A1 (de) * | 2020-12-15 | 2022-06-15 | Agir Aggregat Ag | Förderbandanlage und Verfahren zum Betreiben einer Förderbandanlage. |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3782528A (en) * | 1970-09-14 | 1974-01-01 | Koninklijke Hoogovens En Staal | Method and a device for mixing and homogenizing of bulk material |
WO2009075916A1 (en) * | 2007-12-12 | 2009-06-18 | Ccc Group, Inc. | Dust control material transfer system |
US20150353291A1 (en) * | 2014-06-09 | 2015-12-10 | Ty-Crop Manufacturing Ltd. | Control System for Material Handling Conveyor Vehicle |
-
2018
- 2018-12-03 PE PE2021000810A patent/PE20212398A1/es unknown
- 2018-12-03 JP JP2021531549A patent/JP2022517503A/ja active Pending
- 2018-12-03 AU AU2018422478A patent/AU2018422478A1/en not_active Abandoned
- 2018-12-03 WO PCT/IB2018/059563 patent/WO2019215487A1/es active Application Filing
- 2018-12-03 BR BR112021010771-1A patent/BR112021010771A2/pt not_active Application Discontinuation
- 2018-12-03 US US17/293,271 patent/US20220002095A1/en not_active Abandoned
-
2021
- 2021-05-17 CL CL2021001282A patent/CL2021001282A1/es unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3782528A (en) * | 1970-09-14 | 1974-01-01 | Koninklijke Hoogovens En Staal | Method and a device for mixing and homogenizing of bulk material |
WO2009075916A1 (en) * | 2007-12-12 | 2009-06-18 | Ccc Group, Inc. | Dust control material transfer system |
US20150353291A1 (en) * | 2014-06-09 | 2015-12-10 | Ty-Crop Manufacturing Ltd. | Control System for Material Handling Conveyor Vehicle |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111204599A (zh) * | 2020-02-28 | 2020-05-29 | 西北工业大学太仓长三角研究院 | 一种多相综合除尘技术 |
CN111204599B (zh) * | 2020-02-28 | 2021-03-12 | 西北工业大学太仓长三角研究院 | 一种多相综合除尘方法 |
CH718157A1 (de) * | 2020-12-15 | 2022-06-15 | Agir Aggregat Ag | Förderbandanlage und Verfahren zum Betreiben einer Förderbandanlage. |
EP4015417A1 (de) * | 2020-12-15 | 2022-06-22 | Agir Aggregat AG | Förderbandanlage und verfahren zum betreiben einer förderbandanlage |
Also Published As
Publication number | Publication date |
---|---|
BR112021010771A2 (pt) | 2021-08-31 |
CL2021001282A1 (es) | 2021-11-05 |
US20220002095A1 (en) | 2022-01-06 |
WO2019215487A8 (es) | 2021-06-17 |
JP2022517503A (ja) | 2022-03-09 |
AU2018422478A1 (en) | 2021-06-17 |
PE20212398A1 (es) | 2021-12-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR102340466B1 (ko) | 공압식 이송 장치 | |
US11713648B2 (en) | Proppant dispensing system | |
WO2019215487A1 (es) | Sistema y metodo para la reduccion de contaminacion ambiental en un punto de transferencia de materiales | |
US10766038B2 (en) | Cryogenic grinding apparatus and process | |
CN105621105B (zh) | 气力输送装置及气力输送装置的辅助管道控制系统 | |
CN104457224B (zh) | 一种改进的干法水泥回转窑生料定量喂料系统及生产工艺方法 | |
CN206750181U (zh) | 一种高效率的大米灌装机构 | |
WO2020222008A1 (en) | Abrading apparatus | |
CN106743668B (zh) | 粉体输送装置 | |
CN201647664U (zh) | 用于正压输送装置中的负压料仓 | |
JP2825734B2 (ja) | 石炭の乾燥・分級装置の制御装置 | |
GB2392895A (en) | Pneumatic conveyor control system | |
JPH08507465A (ja) | 閉回路乾式粉砕装置の制御方法 | |
JP2742001B2 (ja) | 微粉炭吹込み制御方法 | |
JP4315747B2 (ja) | 石炭灰船積設備における灰流量制御装置 | |
CN108394727A (zh) | 一种节能型超长距离自动气力输送系统 | |
CN102337563B (zh) | 氧化铝流量控制装置 | |
CN105921226A (zh) | 湿式球磨机、用于湿式球磨机的入料装置及其入料方法 | |
CN208617681U (zh) | 一种污泥脱水系统 | |
CZ5638U1 (cs) | Odsávací zařízení vzduchu | |
CN206444658U (zh) | 一种自动进料多辊抛光机 | |
JP6155299B2 (ja) | 揚荷装置 | |
JP3292257B2 (ja) | 粉粒体搬送制御方法 | |
JP6798522B2 (ja) | 粉体供給装置 | |
CN209149159U (zh) | 球磨机磨矿浓度自动检测和调控系统 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 18917962 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2021531549 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112021010771 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: 2018422478 Country of ref document: AU Date of ref document: 20181203 Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 112021010771 Country of ref document: BR Kind code of ref document: A2 Effective date: 20210602 |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 18917962 Country of ref document: EP Kind code of ref document: A1 |
|
32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205 DATED 28.07.21) |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 18917962 Country of ref document: EP Kind code of ref document: A1 |