SU1500370A1 - Method of preparing slurry in slime separator including input and distributing chambers and the slime separator - Google Patents

Abstract

The invention relates to the field of mineral processing by wet methods and can be used at the beneficiation plants of the mining and metallurgical enterprises of ferrous and ferrous metallurgy, as well as in the chemical and building materials industries. The purpose of the invention is to improve the accuracy of pulp preparation in the pulp splitter. For this, the pulp is averaged by spiraling into the receiving chamber (K) 1, the constant level of the pulp is maintained in K 1 by overflowing a part of the pulp. Next, the density and flow of the overflow (RP) are measured. The volume RP is determined. Briefly interrupt the distribution of the pulp fission product (PP). The increment of the volume RP is then measured during the short-term interruption of the PP distribution. Carry out the distribution of PP in proportion to the increment of the volume RP. The pulp divider also contains distribution K 2, consumables with gates 3 short-term interruption of PP distribution, gates 5 and actuators 4 and 6, and K 2 is equipped with an overflow pipe 7, a densitometer 8, a flow meter 9 and a block 12 for controlling the distribution of PP. Moreover, K 1 is made in the form of a funnel with a cylindrical drain part, and K 2 is in the form of a cylinder inside which the cylindrical part K 1 is placed. 2 sec. f-ly, 1 ill.

Description

The invention relates to the processing of minerals by wet processes and can be used in the processing plants of the mining and metallurgical enterprises of the non-ferrous and ferrous metallurgy, as well as in the chemical and industrial materials industry.

The purpose of the invention is to improve the accuracy of the preparation of the pulp in the pulpod.

The drawing shows a block diagram of the device.

The method consists in the fact that the pulp is averaged by a spiraling input into the receiving chamber, a constant level of pulp is maintained in the distribution chamber by overflowing a part of the pulp, the density and flow of the overflow are measured and the volume flow of the overflow is determined by the measured values, briefly interrupted distribution of pulp fission products and measure the increment of the volumetric flow rate, overflow during the period of short-term interruption of the distribution of pulp fission products, and the distribution of pulverized fission products proportional to the increment of the volume flow reales.

The pulp divider consists (see Fig.) Of the receiving chamber 1 with the spiral-shaped input of the initial pulp material, communicating with it by the distribution chamber 2, the discharge nozzles with the closures 3 short-term interruptions of the flow of the pulverized products with the actuators 4 and the closures 5 with the actuators 6, the overflow nozzle 7, the density meter 8 and the flow meter 9 with secondary devices 1Q, 11, the control unit 12, the distribution of pulverized products.

The device works as follows.

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 The original pulp product is continuously fed into the receiving chamber 1 in a spiral, where it is mixed due to the resulting centrifugal force, then flows through the bypass openings into the distribution chamber 2, from where it is fed through the feed ports to the feed points. By constant discharge of a part of the pulp through the overflow pipe 7, a constant level H of the pulp in the pulverizer is provided, which stabilizes the pulp head in it. Density meter 8, the flow meter 9 continuously measures the density and volume flow of the overflow, the corresponding signals through the secondary devices 10, 11 are fed to the first and second inputs of the unit 12, where they are processed in accordance with predetermined algorithms, the control signals from the unit 12 are fed to the executive mechanisms 4,6, respectively, opening (closing) and regulating the pulp consumption at the consumed points with the help of valves 3 and 5, respectively.

As a densitometer, the PR-1025 radioactive densitometer can be used, the flow meter - the induction flow meter IR-61.

The pulper division product distribution unit 12 implements the following algorithms due to the control functionals of the processing apparatus combined with the pulp divider.

Stabilization of the volumetric flow rate of the pulverized products

  1 X. (t) (V, -) - Xo (t) (V;) | A (t) - min

Hu. (t) kp, -i,. (t) + kp.T ;; J4 (t) dt,

where is xjj. (t) (Vj) - the current value of the volumetric flow rate of the i-ro product of pulpo fission;

Xoi (t) (V, 0

 - installation of the i-th volume flow controller; At - parameter deviation;

Xu. (T) is the control action proportional to the deviation and the integral of the deviation (pi-law);

k T - tuning parameters of regulation.

Definition of X. (t) (V-) produced

 one

as follows, C of block 12 with time spans T, 1 ... T, provide control signals to actuators 4, closing 1, 2, ..., n consumable ports of pulp separator gates 3 for a time; the volume flow rate of the overflow Vp increases each time by an amount equal to the volume flow V. from the i-ro discharge pipe, which is recorded by the volume flow sensor 9 and transferred to block 12, where X is selected. (t) () according to standard law extracting an extremal signal from the set of current for the period I, Tj, .. T, and then serves to test the above law of regulation

(PC, for example) adjusting the flow rate of the i-ro flow of the puls dividing shutters 5. The polling cycle can be repeated continuously or periodically according to the instructions of the operator. T ,, T ... T ", tfb is determined during the device debugging period, depending on the ratio, the transport lag of the pulp overflow flow to the control point of the volume-mass parameter to the transport delay t, i-ro flow of pulp flow to the feed point, and ., - should be no more than 0:, 5 due to the avoidance of violation of the stability of the technology of subsequent operations of the beneficiation scheme. The adjustment of the settings Xp (t) () of the volume flow controllers is carried out according to the signal a (see Fig.) From the associated control systems when the type of raw material and the conditions of the technology change.

The mass flow rate (and density) of the pulverization products is stabilized by standard two-step control open-closed at each i-th flow orifice when the i-th signal of the mass flow limit of the set range is M, i.e. according to the expression

9 Hu. (0 (m.) I

+ XY, - (t) (M), if X. (t) (MO X ,,,, (M, Mox) -Xh- (0 (M.), If X. (1) (M;) X. „„ „(M, - ,,„,)

  T (t) (M, -) 5 X

The circuit functions as follows.

The signals X, (t) (pj) of the density p (t) of the pulp from the first input of the control unit and the volume flow signals V; (t), received during selection, the signals X. (V) are transformed, receiving the signal of mass consumption M ,, according to the formula

Xt (s) (rp) .. -,

x. (t) (M, -) x; (t) (- p;) iT

X (t) (VO,

where X -. () - signal b (dash.) corresponding to the density of the processed mineral raw materials, is sent to the third input of block 12 and corrected when the type of raw material changes.

The received signal of the mass flow i-ro of the pulpo-fission flow is further implemented according to the specified functionality, by opening (closing) the consumable

if X. (t) (MO X ,,, (M, Mox) if X. (1) (M;) X. „„ „(M, - ,,„,)

  T (t) (M, -) 5 X.V..c (M.MC.KC

pulp splitter holes 3 with a delay period T. determined during the debugging period of the pulp splitter and associated with a constant time variable T of the capacitive collector-mixer-separator of the technological scheme located in front of the pulp splitter and where the overflow flows, for example , sump-cyclone pump, conical device, thickener, etc. With each step regulation by opening (closing) the i-ro discharge hole of the pul-splitter in the closed i technological circuit: a capacitive collector-mixer-separator-pulp separator-overflow pipeline changes the mass stock

mineral raw materials (and pulp density); the steady state value is observed over a period of time proportional to TO. Experimentally -

found that T must be at least 2Tr.

At each opening (closing) of the i-ro discharge opening, a signal is provided in (Fig.) From unit 12 to the associated technological devices.

The control of the total volumetric V (t) and mass flow of the pulp processed mineral raw material passing through the pulp divider is carried out by linear summation of the signals of the volumetric and mass flow rates of the pulpefission, respectively.

X,. (T) (V,.; XT, - (t) (M, -).

X (t) (V °). (T) (V-)

X (t) (M): Zx. (T) (M;);

determine the signal A of the flow of pure water: XT (t) (A) X (t) (V)) (M) / / X, (). The received signals (t) (voy,) (A) are transmitted to the central VM (signal d) to calculate the technological balances of ore and water consumption at the processing plant.

The use of the invention allows to increase the reliability of the pulp splitter and the accuracy of dividing the pulp in the pulp divider,

Claims (1)

1. A method of preparing pulp in a pulp divider with receiving and distributing chambers, including collection, averaging and distribution of pulp on pulps 5) 5 products, which is due to the fact that, in order to increase the accuracy of pulp preparation in a pulp splitter, the pulp is averaged by a spiral enter the receiving chamber, maintain a constant level of pulp in the distribution chamber by overflowing a part of the pulp, reduce the density and flow Compiled by V.Persits Editor A.DolinichTekhred M.Khodanych | Proofreader I, Muska Order 4801/11 Circulation 498 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab., D / 5 and the measured flow rate determines the volume flow of the overflow, briefly interrupts the distribution of the pulverization products and measures the increment of the volumetric flow of the overflow in period 1 at a time interruption of the distribution of the products of pulverization, and the distribution of the products of pulverization takes place in proportion to the increment of the volume flow of the overflow. 2, The pulp divider with receiving and distributing chambers, containing expendable nozzles with valves and actuators, installed in the lower part of the distribution chamber, and the receiving chamber connected by distributing by-pass holes, so that , in order to increase the accuracy of pulp distribution, the Podpodletitel is equipped with an overflow nozzle of the pulp located in the upper part of the distribution chamber, a densitometer and a flow meter located on the overflow nozzle, a control unit distribution of pulp division products, the receiving chamber being made in the form of a funnel with a cylindrical drainage part; the distribution chamber is designed in the form of a cylinder inside which the cylindrical drainage part of the receiving chamber is placed; located symmetrically to the vertical axis of the pulp divider, the diameter of the overflow pipe is equal to the sum of the diameters of the consumables bkov and the length of the overflow pipe from the upper part of the distribution chamber to the location on the p-askhodomera overflow pipe not less than half the length of the shorter of consumable nozzles. Subscription