SU850131A1 - Method and apparatus for controlling process of desliming magnetic concentrate - Google Patents

Description

a density meter installed at the outlet of the vacuum filter and connected in series by pre-Baieiib. a functional unit, a switch actuators and adjustable valves installed on pipelines connected to the pulp distributor and the deschlamator, while the outputs of the density meters are connected to the input of the converter.

The drawing shows a schematic diagram of a device implementing the proposed method. The device includes a declarator 1, a pump 2, a vacuum filter 3, a pulp dispenser 4, density meters 5 and 6, a converter 7, a functional unit 8, a switch 9 and actuators 10 adjustable with a drive 11; The device works as follows. The sands from the reclamator 1 are pumped by the pump 2 into the vacuum filter 3, the overflow from which (circulating load) is fed to the pulp distributor 4, from where it is fed to different depths of the reclamator 1 vat by pipelines. overflow, is fed through the converter 7 to the input of the functional unit 8, the outputs of which through the switch 9 act on the corresponding actuators of the adjustable valves 11 installed on the pipelines connecting Dispenser 4 pulp with distribator 1.

In the zones of the working volume of the disllamator (compaction, discharge, etc.) the density of the pulp has a well-defined, almost constant value. Therefore, since the incoming pulp from the baths of the vacuum filter has already passed through the process of decalcification and condensation, then, having determined its density, it is sent directly to the tank of the advertiser, to the zone with the corresponding density of the material. The law of magnetite density distribution over the depth of the declarator is expressed by the formula

-ail

.

(one)

where c / if is the density of the pulp on the definable

. the depth of the declarator; (- pulp density at the entrance of the desllamator;

a - cozffnaient, taking into account the pulp properties, the size of the material and the mode of operation of the declarator;

H is the depth of the dislamator; h is the depth of the dislamator where

pulp density is determined. After algebraic transformations, expression (1) has the form

  lf

From the formula (2) it can be seen that by a given density value at a certain depth of the declarer one can determine the depth at which this material is located. Thus, measuring the density of the overflow coming from the vacuum filter to the deashmatr can be replaced in expression (2) by cf-. on c, where c / if, is the overflow density, determine the depth of the disclaimer to which the overflow with the set value of density should be supplied, i.e. If this is the case, the value of the depth of the desmotor is defined as

. (B)

but

Measured by flux-flowmeters 5 and 6 are signals of the density of supply and overflow from vacuum filters through the converter 7 to the input of the functional unit 8, the output of which is a signal corresponding to the depth of the tank of the advertiser where the circulating load must be applied. In accordance with the magnitude of the signal from the output of the functional unit 8, the switch 9 sends a signal to a specific actuator 10, which acts on the adjustable valve 11, ensuring that the circulating load is supplied to a certain depth of the displamator I, where the density of the pulp and the circulating load are equal.

Using the proposed method allows to increase the iron content in the product concentrate by about 0.3%.

Claims (1)

1. The method of regulating the process of decalcification of magnetite concentrate by submitting to the inlet of the pulp deshlamator from the magnetic separation, the overflow from the vacuum filter and water with continuous measurement of the pulp density at the inlet of the desharmacator, and with the fact that, in order to reduce the iron content in the drain of the declarer, by improving the quality of regulation, the density of the overflow from the vacuum filter is additionally measured and fed to the declarator to a depth determined by the following dependency , .a cA „ at depth of flow of overflow to the distiller; depth of the declarator; magnetic factor the properties of magnetite, the size of the material and the mode of operation of the deschlamator;