SU1666191A1 - Method of hydrocyclone control - Google Patents

Abstract

This invention relates to the enrichment of minerals in magnetic mineral suspensions, and used in ore processing plants. The goal is to improve the quality of separation by reducing the mutual clogging of products. To do this, measure the magnetic permeability of light and heavy enrichment products and calculate the quotient of these values. The calculated value is compared with a predetermined value and, by comparison, the consumption of the heavy product is changed in the direction of decreasing the absolute value of the error. 2 Il.

Description

The invention relates to the enrichment of minerals in magnetic mineral suspensions, mainly for the separation of the specific weight of coal, shale, ores of ferrous and non-ferrous metals, and can be used in ore-dressing plants.

The purpose of the invention is to improve the quality of separation by reducing the mutual clogging of enrichment products.

Figure 1 shows a block diagram of a device implementing this method; figure 2 - separation of material density.

The essence of the method is as follows.

Part of the suspension enters the trunk of the light product, and the remaining part - into the trunk of the heavy product. Magnetic properties, suspension, depending on its content in light and heavy products, affects the magnetic field.

permeability of products. and, therefore, in addition to the separation function, can perform information. At the same time, the purity of the separated products depends on the content of the mineral suspension in them. For the high-quality operation of the hydrocyclone, it is necessary to perform two operations: to separate the material in the presence of a mineral suspension in a rotating flow: to discharge the separated fractions in accordance with their volume content in the initial product. In the separation, the mineral suspension occupies an intermediate position in the hydrocyclone between the light and heavy fractions and, with optimal unloading, passes into both light and heavy products, ensuring their magnetic permeability. Calculate the quotient of the magnetic permeabilities of the separated products, get the exact position of the interface of the material and, using the calculated value as the control

ABOUT

oh oh

Yu

parameter when controlling the flow through the sand outlet, it is possible to improve the quality of separation.

The method is carried out as follows.

With good separation in the hydrocyclone (Fig. 2a), the mutual contamination of the products is minimal, and the suspension is distributed between the nozzles of the lung and the heavy products. The magnetic permeabilities of the products in the pipes are in a given ratio. With a decrease in the proportion of heavy fractions in the starting product, separation occurs as shown in FIG. 16, whereby a heavy product becomes clogged with a light weight. At the same time, the magnetic permeability of the light product decreases, and the heavy one increases, which leads to a deviation of their particular from the desired value. In the case of increasing the proportion of heavy fractions in the initial product, separation occurs as shown in Fig. 2c, where the light fractions are clogged with heavy ones. The magnetic permeability of the light product increases, and the magnetic one decreases, which leads to a deviation of their particular from the predetermined one with the opposite sign.

Using the indicated deviation as a control variable when assigning flow through a sand nozzle, one can optimize the quality of separation in the hydrocyclone.

The device (Fig. 1) includes a hydrocyclone 1, a nozzle 2 of the initial product, a light product nozzle 3, a heavy product nozzle 4, a light product magnetic permeability sensor 5, a heavy product magnetic permeability sensor 6, a calculator 7, a setting device 8, a comparator 9, regulator 10, actuator 11 sand nozzle. The sensors 5, b are connected to the inputs of the calculator 7, the output of which is connected to the first input of the comparator 9. The sensor 8 is connected to the second input of the comparator 9, the output of which is connected through

controller 10 to the actuator 11.

The device works as follows.

The signals from sensors 5 and 6, corresponding to the magnetite content of the mineral suspension in the separated products, are fed to the calculator 7, where they are divided. The result of the division is compared with sig- /

cash knob 8 in the comparator 9, from the output of which the control action

15

v- Ml II Y-Uzd

where Mt, Ml is the magnetic permeability of heavy and light fractions, respectively;

ed. - a task signal, fed to the controller 10, where it is processed according to the PID law and fed to the actuator 11,

The actuator adjusts the flow through the sand nozzle, providing a change in the ratio of the costs of light and heavy products, and hence the distribution of the magnetic mineral suspension. As a result, control is performed to reduce the absolute value of Y.

Claims (1)

Claim Method Hydrocyclone Control Method Based on Measurement of Magnetic Permeability of Light and Heavy Products enrichment, changing the flow rate, characterized in that, in order to improve the quality of separation by reducing the mutual contamination of the enrichment products, the fractional values of the magnetic permeability of the light and heavy products are calculated, the calculated value is compared with the specified value, and the comparison results change to reduce the absolute value mismatch. Jl / T Pegye v Original YU // T yellow. . . FIG. / Q air pole with FIG. 2