SU1755928A1 - Device for measuring the content of sludge in magnetite suspension - Google Patents

Abstract

Uses of the invention: mineral processing. The essence of the invention: the device includes a flow tank (PE) 11, located in the PE 11 sensor (D) 1 total density. In this case, D 1 is made in the form of a float with a rod 5 and a plunger 4 and installed with the ability to interact with the plunger of the inductor (CI) 3. On the vertical pipe 14 there is installed D 2 of magnetite content, made in the form of CI. With the outputs KI 3 and D 2 connected measuring unit. The device is equipped with a spanning LE 11

Description

Souslensch Susle / AI

discharge capacity 13. The nozzle 14 is connected with its lower part with the lower part of the PE 11. In the upper part of the nozzle 14, a device 15 is installed to drain the suspension into the discharge tank 13, The upper edge of the PE 11 is made in the form of an overflow threshold 16, the upper edge of the nozzle 14 is located below the upper the edges of the PE 11, the Measuring unit includes a secondary device b to control the total density, a computing unit 7, a secondary device 8 monitoring the concentration of sludge in magnetite suspension. The suspension is fed to the PE 11 from the receiving stabilizing device 10. In this case, D 1

with an increase in the density of the suspension under the action of buoyancy, it moves upwards, and with a decrease in the density it goes down. When the density is higher than the specified plunger 4 enters KI 3, the signal goes to the device 6. From the PE 11, part of the suspension through pipe 14 is fed to D 2, the density component of the suspension is measured by magnetite, the signal from CI D 2 is fed to device 8. The signals from the outputs of devices b and 8 are fed to block 7. A signal proportional to the concentration of sludge in suspension is fed to the device 9. The suspension is discharged through nozzle 12, pipe 14 and overflow threshold 16. 1 silt,

This invention relates to the field of the enrichment of coal and shale in a magnetite suspension.

A device for measuring the concentration of sludge in a magnetite suspension is known. The slurry concentration is measured by the difference in density values at the inlet and outlet of the classification apparatus using float sensors.

The disadvantage is that measuring the concentration by difference of the density values of the suspension is unrepresentative, since the magnetite and sludge loss values are always variable. Using the device, you can measure only the change in total density, and not the change in density due to the concentration of sludge in the slurry.

A device for measuring the content of sludge in a magnetite suspension, containing two float-operated, rigidly coupled sensors, a measuring secondary device, a sensor for measuring the total density of the suspension, and a sensor for measuring the content of sludge in suspension, made in the form of induction coils, is known.

The disadvantage of the prototype is that, due to sticking on the shoulders of pitcher-shaped clay floats and other particles, the float increases in weight, thereby disrupting the accuracy of the measurement of the density of the suspension. A float device to maintain the level in the measuring vessel complicates the design and does not provide reliable, efficient operation.

The aim of the invention is to improve the reliability and accuracy of measurements.

The goal is achieved by the fact that in a device for measuring the concentration of sludge in a magnetite suspension, containing a flow tank with

Using a sensor for measuring the total density of the suspension, made in the form of a float with a metal plunger interacting with an inductance coil and a magnetite content in suspension, made in the form of an inductance coil, a measuring unit to which the outputs of both coils are connected, in which new elements are introduced according to the invention, namely, the device has a capacity for

removing the suspension covering the flow container, the channel enclosed by the magnetite content sensor, the lower part of the channel is connected to the lower part of the flow chamber, and the upper edge (drainage device) is located below the upper edge of the flow container made in the form of an overflow threshold.

The drawing shows a longitudinal section of a device for measuring the content

sludge

The device contains a sensor of the total density of the suspension 1, a sensor of the magnetite D content of the suspension 2, an inductive coil 3, a plunger 4 placed on the rod

5, secondary device for controlling total density b, computing unit 7, secondary device for controlling density of suspension according to taxnetite 8, secondary device for controlling concentration of sludge in magnetite suspension 9, receiving stabilizing device 10 for supplying suspension to flow container 11, discharge nozzle 12, discharge capacity 13 to remove the suspension coming to control

its parameters, the pipe 14 for supplying the suspension through the inductive coil 2 of the sensor of magnetite content in the suspension. The pipe 14 is connected to a device for discharging the suspension 15, which is below the upper edge of the flow container, made in the form of an overflow threshold 16.

The device works as follows.

Suspension flows into flow container 11 from receiving stabilization device 10. The sensor of the total density of the suspension 1, made in the form of a float, moves with the rod in the vertical direction, with increasing density under the action of pushing force, moves up, and with decreasing density decreases. When the density is higher than the given, the float sensor 1 and the rod 5 move upwards, the plunger 4 on the rod 5 enters the inductance coil (induction converter) 3, the resulting unbalance EMF is transmitted to the device for monitoring total density 6 p0b. Part of the suspension is taken from the flow-through container 11 and is fed through the inductance 3 of the magnetite density control sensor via the inlet 14 and the density component of the suspension is measured by the magnetite PHI. It should be noted that the magnetite suspension from the discharging tank 13 is almost immediately removed, i.e. the discharging container 13 is always empty. The suspension flows through the inductance coil, it increases the voltage that is applied to the secondary device 8. The signals from the outputs of the secondary devices 6 and 8 are fed to the computing unit 7, in which the sludge concentration A is determined using the formula L / Oujk / Eob - / Ohm / OSH of magnetite suspension, Signal proportional to the concentration of sludge in suspension, is fed to the secondary control device 9. The suspension entering the flow tank 11 in equal volumes is discharged through the nozzle 12 (which can be in the form of an overflow threshold or discharge pipe), a device for discharging the suspension 15 and the overflow threshold 16. The thickness of the overflow layer through the overflow threshold 16 varies between 0.5 mm and the plunger moves from 3 to 150 mm, so that the measurement error of the total suspension density is within 0.03%. It should also be noted that the device for discharging the suspension 15 is located below the upper overflow threshold 16. At the same time, through the nozzle 14 it is possible to create

the intensive movement of the magnetite suspension and through the pipe 14 and the inductor 2, and the magnitude of the volumetric flow of the magnetite suspension will be

almost constant, independent of the thickness of the layer of magnetite suspension over the overflow threshold 16.

In this device, due to the intensive movement of the pulp of magnetite suspension and the absence of stagnant zones in the flow container, it is possible to avoid the separation of the pulp in height. And since the magnetite suspension flows around the float rising from the bottom, it is possible to avoid sticking solid particles on the shoulders of the float. All this increases the reliability of the results, as well as their accuracy.

In the device, the float sensor measuring the total density of the suspension is found in the upward flow of the magnetite suspension, while on all sides the sensor flows around the flow of the magnetite suspension, which leads to the float sensor being constantly

5 to the center of the flow container, without hesitation relative to its location. In addition, the float sensor is well washed with a magnetite suspension, which eliminates the possibility of sedimentation on it.

0 solids.

t In the device, the magnetite suspension is supplied to the receiving stabilizing device in excess, while the excess part is discharged into a collection of magnetite suspension, into which the magnetite suspension is also passed, passing through the sensor of magnetite content in the suspension. In this case, the device operates stably with a constant flow of magnetite suspension.

Installing a device for discharging a suspension into a discharge tank below the upper edge of a flow tank made in the form of an overflow threshold allows: 1) to create an intensive movement of the magnetite suspension in the channel, which improves the accuracy of the measurement, 2) equalizes the time costs, i.e. the flow will not depend on the height of the layer above the overflow threshold.

Claims (1)

0 claims A device for measuring the content of sludge in a magnetite suspension, including a flow container, a total density sensor located in the flow container, 5 made in the form of a float with a rod and plunger and installed with the possibility of interaction with the inductor plunger, a magnetite content sensor in suspension and connected to the coil outputs if the inductance and the sensor of the content of the magnetonium to drain the suspension into the unloading and measuring unit, characterized by a capacitance, the sensor of the content of the magnet that, in order to increase the reliability of the Internet, is installed on the vertical pipe of the measurement accuracy, it is provided with in the form of a coil flowing capacitance discharging capacitance-5 inductance, the upper edge of the flowing flow. connected by its lower part of the family property, it is made in the form of an overflow by the lower part of the flow tank of the vertical horn, and the upper edge of the vertical pipe nozzle and installed in the upper tube is located below the upper edge of the part of the vertical pipe of the flow tube.