RU2511377C2 - Station of pulp sampling and method of pulp flow sampling with its use - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: invention refers primarily to mine-mill industry in part of operating procedure and equipment development and may be used during pulp sampling in quality control system for products preparation for analysis. Pulp flow sampling method includes installation of slot-type sampling device to sampled pulp pipeline using mating flanges, pulp flow supply to reforming chamber of slot-type sampling device and taking primary sample using slot-type shutoff device. After pulp flow delivery to reforming chamber, pulp flow is reformed to horizontal average flow directed to expansion chamber. Pulp average flow is used for continuous taking of primary sample supplied through inlet chamber and sample outlet branch to feeding funnel of sample reducing module. Reduced sample taking is performed using cutoff-bucket, reduced sample from cutoff-bucket is directed to flow reducer, in which after mechanical mixing of flow on homogenisation disk flow is reformed to vertical down flow through homogenisation chamber, and then - to annular flow directed to reducing chamber walls outgoing from reducing disk, and controlled continuous taking of final reduced sample is performed from pulp annular flow.

EFFECT: obtaining final reduced accumulated sample with minimum error.

3 cl, 3 dwg

Description

The invention relates mainly to the mining and processing industry in terms of the development of technological processes and equipment and can be used in testing pulp in a quality control system to prepare products for analysis.

Known sector sampler, including a radial gap, rotated during sampling so that the gap crosses the flow of pulp passing through a vertical pipe [1].

The disadvantage of this device is the insufficient number of intersections of the pulp stream for an acceptable volume of the reduced sample or, with a sufficient number of intersections of the pulp stream, an unacceptably large volume of the reduced sample.

The claimed device closest in technical essence and achievement of the technological result is the Vezin sampler manufactured by ENGENDRAR Ltd. The known sampler is intended for primary sampling from the pulp stream and includes a housing, a supply funnel, under which a bucket-cutter is located inside the housing and a drain pipe below, an electric drive connected by a V-belt transmission with a vertical shaft along the housing axis, a sampling pipe [2].

The functional purpose of the Vezin sampler is to take a sample from the pulp stream using a bucket-cutter.

The disadvantage of this device is the unacceptably large volume of the reduced sample with a sufficient number of intersections of the pulp stream.

A known LSA sampler with a vertical flow separator manufactured by Outotec. The known sampler is designed to take the primary sample from the pulp stream and includes a housing consisting of an expansion chamber, flanges installed on it, an expansion slotted slot located inside the chamber, mounted in the housing using a flange connection, including a trapezoidal knife, a receiving chamber installed in the receiving chamber sampling pipe [3].

The functional purpose of the LSA sampler is to transform the pulp stream into a horizontal stream and to take a primary sample using a slotted cutter.

The disadvantage of this device is the insufficient number of intersections of the pulp stream for an acceptable volume of the reduced sample or, with a sufficient number of intersections of the pulp stream, an unacceptably large volume of the reduced sample.

In this application, the task is set, while maintaining the basic principles of the technical methods used to create sampling devices, to create a pulp testing system with a minimum error of the final reduced accumulated sample. The stated technical task and the essence of the proposed pulp testing station are expressed by the fact that, in contrast to the known device [2], which contains a housing, a supply funnel, under which a bucket-cutter is located inside the housing and a drain pipe below, an electric drive connected by a V-belt transmission with a vertical shaft the axis of the housing, the discharge pipe, the proposed pulp testing station includes a slotted sampler, comprising a housing consisting of a reforming chamber, a flange mounted on it with a hole nym flange expansion chamber mounted thereon with flange mating flange disposed within the expansion chambers slit cutter mounted in the housing by means of a flanged connection comprising a trapezoidal knife, a receiving chamber mounted on the tube receiving chamber probootvodyaschy; a proof-cutting module, comprising a housing consisting of a box and a hatch, a supply funnel, under which a bucket-cutter is located inside the housing and a drain pipe with a contact flange below, an electric drive connected by a V-belt transmission with a vertical shaft along the housing axis installed in the rotary support unit, mounted on the housing with a support flange mounted on a vertical shaft flow reducer, consisting of an averaging chamber, inside of which a homogenizing disk is mounted on the shaft, a contractile cam ry, inside which is mounted on the shaft shortens disk located beneath the disc which reduces probootsekatel configured as two movable walls forming the adjustable width slit disposed underneath probootvodyaschy pipe.

The functional purpose of the flow reducer is additional mixing of the pulp stream and isolation of the final reduced sample from the pulp stream. The purpose and device of the flow reducer corresponds in basic parameters to the electromechanical disk contractor (RF patent No. 2347205).

Alternatively, each movable sampler wall with a lower edge along the wall length is connected to stationary mutually parallel rotary axes equidistant from the transverse axis of the housing, while the slot width is set by simultaneously displacing the rotary axes of each wall in the opposite or opposite directions to each other by an equal angle.

Figure 1 shows the appearance of the slit sampler in section, and figure 2 and figure 3 shows the appearance of the module of the sample in longitudinal and transverse sections.

The slotted sampler consists of a housing 1, which includes a reforming chamber 2, a flange 3 mounted on it with a counterflange 4, an expansion chamber 5, a flange 3 mounted on it, with a counterflange 4, a slotted 6 cutter inside the expansion chamber 5, including a trapezoidal knife 7, the receiving chamber 8, mounted on the receiving chamber 8, a sampling pipe 9.

The proof-cutting module includes a housing 10, consisting of a box 11 and a hatch 12, a supply funnel 13, under which inside the housing 10 there is a bucket-cutter 14 and below a drain pipe 15 with a contact flange 16, an electric drive 17 connected by a V-belt transmission with a vertical shaft 18 along the axis case 10, mounted in a rotary support assembly 19, mounted on the housing 10 with a support flange 20, a flow reducer 21, consisting of an averaging chamber 22, inside of which a homogenizing disk 23, a contractile chamber 24 are installed inside When the shaft 18 which is mounted pruning disk 25 disposed below the disk 25 which reduces probootsekatel 26 configured as two movable walls 27 forming an adjustable gap width, located underneath probootvodyaschy pipe 28.

The cutting disk 25 is fixed to the shaft 18 with the fixing nut 29.

Sample cutter 26 is made in the form of two movable walls 27 forming a width-adjustable gap (not shown).

The movable walls 27 are aligned with the walls of the sampling pipe 28. The sampling pipe serves to divert the reduced sample.

To regulate the width of the slit, each movable wall 27 with a lower edge along the length of the wall is connected to stationary mutually parallel rotary axes 30 equidistant from the transverse axis of the housing, while the width of the slit is set by simultaneously displacing the rotary axes 30 of each movable wall 27 in the opposite or opposite directions to each other equivalent angle.

The claimed pulp testing station is intended for the implementation of the pulp testing process in a quality control system to prepare products for analysis.

There is a known method of testing the pulp flow used in the Outotec LSA sampler, comprising supplying a stream to the reforming chamber, transforming the stream into a horizontal averaged stream entering the expansion chamber, and periodically sampling the reduced sample with a slotted cutter. The known method leads to the accumulation of a reduced sample of unacceptably large volume with a sufficient number of crossings of the flow, and when accumulating a reduced sample of an acceptable volume to an insufficient number of crossings of the flow of pulp, which in the latter case leads to an unacceptably large error of the reduced sample.

A known method of testing the flow of pulp used in the sampler "Vezin", the company "ENGENDRAR Ltd", which includes feeding the stream into the supply funnel, and selection from the stream coming from the funnel inlet, reduced sample using a bucket-cutter. This method leads to the accumulation of an unacceptably large volume of the reduced sample with a sufficient number of intersections of the pulp stream.

In this application, the task is to minimize the disadvantages of the known methods, to obtain a reduced sample of acceptable mass with a sufficient number of intersections of the pulp stream.

The task to achieve a technical result and the essence of the proposed method are expressed in that, using known elements of technological methods, including the supply of pulp stream, reformation, primary sampling, reduction, in the proposed method, the technological process is carried out using the claimed pulp testing station, and after that feeding the pulp stream into the reforming chamber, the pulp stream is reorganized into a horizontal averaged stream directed into the chamber continuous, and from the averaged pulp stream, continuous sampling of the primary sample is carried out, which is fed through the inlet chamber and the pipe outflowing to the funnel of the inlet-shortening module, where the shortened sample is taken using the cutting bucket, and the shortened sample from the cutting bucket is sent to the flow reducer, in which, after mechanical mixing of the flow on the homogenizing disk, the flow is reorganized into a concentrated vertical downward flow through the homogenizing chamber y, and then - in a direction towards the walls of the annular chamber contractile flux outputted from contractile disc and annular flow of the pulp is carried out a continuous adjustment selection end condensed sample.

The proposed pulp testing station and the method of testing the pulp flow with its use are interconnected by a single inventive meaning, aimed at achieving a single technical result that meets the requirement of “unity of invention”.

The operation of the pulp testing station and the implementation of the method of testing the pulp flow are carried out in the following way. The housing 1 of the slotted sampler is installed in the pipe through which the pulp flow is supplied using the flanges 3 mounted on the reforming chamber 2 and on the expansion chamber 5. The housing 1 of the module of the pro-shortening is installed on a flat horizontal platform.

The pulp stream through the reforming chamber 2, where the pulp stream is reorganized into a horizontal averaged stream, is fed into the expansion chamber 5 inside the housing 1 and gets into the slotted cutter 6 located inside the expansion chamber 5. Using the trapezoidal knife 7, the slotted cutter 6 from the pulp stream cuts into continuous sampling. Next, the primary sample through the receiving chamber 8 and the discharge pipe 9 is fed into the funnel leading 13 of the sample reduction module, from where the primary sample is fed to the cutter bucket 14. Using it, a shortened sample is taken, which is subsequently fed to the central part of the surface of the rotating averaging disk 23 of the camera averaging 22 of the flow reducer 21. Getting on the surface of the rotating averaging disk 23, the reduced sample is mixed due to the action of centrifugal force and scattered traction fan on its surface in a direction towards the walls of the blending chamber 22. Since the walls of the blending chamber 22 is condensed sample due to the force of inertia obtained by homogenizing rotating disc 23 and the force of gravity is intense in the reformation of the centered circular vertical downflow. Subsequently, the downward flow by gravity enters the central part of the contracting disk 25 of the contractile chamber 24. Once on the surface of the rotating contracting disc 25, the flow is again mixed and moves in a circular fan to the walls of the contractile chamber 24, along which the circular flow moves downward. With the help of a sample cutter 26 located under the cutting disk 25 with movable walls 27, which form a slit that is adjustable in width of the opening, the final reduced sample is continuously taken from the flow. Depending on the purpose, particle size distribution and volume of the required representative sample, the width of the slit is reduced or increased by the displacement of the rotary axes of the movable walls 27.

In the slam-shut device 6 of the sampler, the slit stream is divided into two streams. The stream falling into the slotted cavity of the trapezoidal knife 7, by gravity, through the receiving chamber 8, is discharged through a sample pipe 9 to divert the primary sample to the funnel, which leads 13 of the module of the shortening. The main volume of the pulp stream (the tested pulp stream) is removed from the housing 1 of the slotted sampler through the expansion chamber 5 into the pipe through which the pulp stream is supplied.

Using the bucket-cutter 14 of the module of the pro-shortening stream, the primary sample stream is divided into two streams. The stream entering the slot cavity of the cut-off bucket 14 (shortened sample) is gravity-fed to the averaging chamber 22 of the flow reducer 21. The main volume of the primary sample stream (the tested primary sample stream) is removed from the case 10 of the sample reduction module through the drain pipe 15.

Using a sample cutter 26 of the module of the pro-shortening flow, the reduced sample stream is divided into two streams. The stream entering the slot cavity of the sampler 26 is gravity-discharged through the discharge pipe 28 to divert the final reduced sample. The main volume of the reduced sample stream (the tested reduced sample stream) is removed from the averaging chamber 22 of the flow reducer 21 through the case 10 of the pro-shortening module through the drain pipe 15.

The proposed pulp testing station can be used to test a continuous process pulp flow.

Unlike the known device for the method of testing the pulp stream in the proposed technical solutions, the entire pulp stream passing through the working zone is subjected to averaging, the selection of the primary sample, the reduced sample and the final reduced sample is carried out continuously from the repeatedly reformed average pulp stream, which ensures the implementation of the basic principles sampling: the non-preference of the selection of flow elements in a spot sample and the equal representation of the elements of the flow of pulp in the combined both.

The design of the pulp testing station also ensures the absence of “zones of accumulation” of the solid phase of the pulp inside the housing of the slotted sampler and the sample reduction module, which practically eliminates the need for regular cleaning of the equipment of the pulp testing station.

To ensure the smooth operation of the pulp testing station, it is necessary to carry out scheduled preventive repairs, daily and periodic inspections and maintenance with the elimination of identified malfunctions. For these purposes, in the design of the slotted sampler, an overlapping window is provided for cleaning the knife of the trapezoidal slotted cutter, and a hatch is provided in the design of the module of the shortening, which allows free access to the internal elements of the module.

The use of the pulp testing station in the quality control system of production products makes it easier for the employees of the Quality Control Department, to increase the accuracy and representativeness of testing, to reduce errors in the determination of measurable and calculated indicators, and to reduce the discrepancy in the goods balance.

LITERATURE

1. Kozin B.3. Mineral Testing: A Scientific Monograph. Ural. state mountain un. Yekaterinburg: Publishing House of the Ural State Technical University, 2011.316 s., P. 103.

2.http: //www.anakon.ru/prob/vezin.php.

3.http: //www.outotec.com/pages/Page 36486.aspx? Epslanguage = RU.

Claims (3)

1. A slotted sampler, comprising a housing consisting of a reforming chamber, a flange mounted on it with a counterflange, an expansion chamber, a flange mounted on it with a counterflange, a slotted expansion cutter located inside the chamber, fixed in the housing using a flange connection, including a trapezoidal knife , a receiving chamber mounted on a receiving chamber, a sampling tube, through which the selected primary sample enters the pro-shortening module. 2. A sample-reducing module, comprising a housing consisting of a box and a manhole, a discharge pipe, through which a selected primary sample, a supply funnel, under which a bucket-cutter is located inside the case and below a drain pipe with a contact flange, from the slotted sampler to the funnel of the sample-reducing module, an electric drive connected by a V-belt drive with a vertical shaft along the axis of the housing mounted in a rotary support assembly mounted to the housing using a support flange mounted on a vertical to the shaft, a flow reducer, consisting of an averaging chamber, inside of which a homogenizing disk is mounted on the shaft, a contractile chamber, inside of which a reducing disk is installed on the shaft, located under the reducing disk, a sample cutter made in the form of two movable walls forming a width-adjustable gap located under a sampling pipe, wherein each movable wall with a lower edge along the length of the wall is connected to stationary mutually parallel rotary axes equidistant from ary axle housing, the slit width is set simultaneous offset rotary axes each wall in the counter or in the opposite direction to each other at an equivalent angle. 3. A method of testing the pulp stream, including installing a slit sampler in the pipeline of the tested pulp using reciprocal flanges, supplying a pulp stream to the chamber transforming the slit sampler, taking a primary sample using a slit cutter, and after supplying the pulp stream to the reforming chamber, the pulp stream is reorganized into the horizontal averaged flow directed into the expansion chamber, and from the averaged pulp stream, a continuous primary sampling is performed, my receiving chamber and the sample pipe leading to the funnel of the sample reduction module through the chamber, and sampling the reduced sample is carried out using a cutting bucket, the reduced sample from the cutting bucket is sent to a flow reducer, in which, after mechanical mixing of the flow on the homogenizing disk, the flow is transformed into a vertical downward flow flow through the averaging chamber, and then into the annular flow directed to the walls of the contractile chamber, coming from the contracting disk, and from the ring th slurry flow adjustment is performed uninterrupted final selection of the reduced sample.