SU1512932A1 - Method of preparing waste water of flotation of lead-zinc ores for circulation water supply - Google Patents

Abstract

The invention relates to beneficiation processes in non-ferrous metallurgy, in particular, to methods for preparing wastewater flotation of sulfide lead-zinc ores for use in recycled water supply. The aim of the invention is to reduce the settling time of wastewater and simplify the cleaning process. The method is carried out by treating sulphide lead-zinc flotation tailings with high-voltage pulse discharges, whose energy is 5.0-5.2 kJ / dm ³ , followed by settling, sludge separation and returning clarified water to the collective flotation cycle. The method allows to preserve the properties of recycled water for a long time, to improve the circulating water supply scheme and reduce the water consumption of clean water, to significantly reduce the time of settling and the cost of processing tail pulp. 1 tab.

Description

one

(21) 4231433 / 31-26

(22) 04/17/87

(46) 07-. 10.89. Bul № 37 (7) Krasnoyarsk Institute of Non-Ferrous Metals M.I. Kalinina (72) V.V. Korostovenko, I.I. Shepelev, A.I. Titovska, M.Yu. Konstantinova and A.E. Mokrinsky. (53) 663.63.08 (088.8)

(56) Handbook of ore beneficiation. Special and auxiliary processes, enrichment testing, control and automation./ Ed. O.S. Bogdanova and V.I. Revnivtseva, ed. 23. M .: Nedra,

.1983, p. 169-171.

(54) METHOD FOR PREPARATION OF WASTE WATER. FLOTATION OF SULFIDE LEAD-ZINC ORES FOR REVERSE WATER SUPPLY

(57) The invention relates to enrichment processes in non-ferrous metallurgy.

in particular to the methods of preparation

Sewage flotation of sulfide LEAD-ZINC ores for their use in the circulating water supply. The aim of the invention is to reduce the settling time of wastewater and simplify the cleaning process. The method is carried out by treating wastewaters of lead-zinc flotation with high-voltage. pulse discharges whose energy is 5.0–5.2 kJ / dm, followed by settling, separation of the sediment and return of the clarified water to the collective flotation cycle. The method allows to preserve the properties of recycled water for a long time, to improve the circulating water supply scheme and reduce the water consumption of clean water, to significantly reduce the time of settling and the cost of treatment. tail pulp treatment. 1 tab.

i W

This invention relates to ore beneficiation processes in non-ferrous metallurgy,; in particular, to the methods of preparation: wastewater after flotation of sulfide LEAD-ZINC minerals for use in the circulating water supply.

The purpose of the invention is to reduce the time of settling of wastewater after flotation and to simplify the process of preparing wastewater for recycling water.

With a high voltage distribution, the pH of the medium does not increase, as in the known method, therefore it is excluded

the stage of acidification of water before sending it to the turnover.

For the implementation of the method waste. The WATER of the main flotation of sulfide LEAD-ZINC ores from the laboratory ftopomash1.1 comes into a 2-dm puller, into which 1 dm of wastewater is poured, where they are subjected to high-voltage pulsed treatment, the optimum energy being 5.0-5. 2 kJ / dm, voltage 2.6-2.7 kV. When the discharge energy is less than 5.0 kJ / dm and the voltage is less than 2.6 kV, the pH and the settling time are reduced slightly, and at energy apex

1C

WITH

with tc

rot more than 5.2 kJ / dm and a voltage greater than 2.7 kV pH and the settling time remains about the same as at 5.1 kJ / dm, but the power consumption increases.

The discharge is carried out between two steel opposing tip-plane electrodes placed in a container with tail pulp. The distance between the electrodes is set to 8 mm.

Then, the treated high-voltage discharge wastewater is settled for 2-7 minutes. With a standing time of less than 2 minutes, the height of the light layer sharply decreases, and with a time of standing longer than 7 minutes, the height of the clarified layer slightly increases. Prepared wastewater is returned to the collective flotation cycle.

The table shows the effect of discharge mode on the process of settling and the pH of tail pulp of lead-zinc ores treated with high-voltage pulsed discharge.

d 0

five

The proposed method for the treatment of flotation wastewater for circulating water supply improves the circulating water supply scheme and reduces the water consumption of clean water, significantly reduces the settling time, which leads to a decrease in area j discharged to the tailings, to save the properties of circulating water for a long time and reduce the cost of treatment pulp.

Claims (1)

Invention Formula The method of preparing wastewater flotation of sulfide lead-zinc ores for recycling water, including sedimentation followed by purification from organic impurities, characterized in that, in order to reduce the time of settling and simplify the process, the wastewater flotation before settling is subjected to treatment. high voltage pulse discharges whose specific energy is 5.0-5.2 kJ / dm. /