SU1068173A1 - Collector for flotation of polymetal ores - Google Patents

Abstract

The use of N- (tetrahydrocyclopentadienyl) N N-dimethylurea of the formula ONZ) gxoin as an additional collector in the flotation of polymetallic ores.

Description

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The invention relates to the enrichment of ores and can be used in the flotation of sulphide ores.

It is known to use butyl, ethyl horn and isopropyl xanthates, alcohol aeroflots, or their combinations of Cl3 as collectors for the flotation concentration of polymethysthetic sulfide ores.

However, the use of xanthates and aeroflots is not always effective enough.

It is known the use of urea as a collector in the flotation of ores G23.

However, the use of urea in the absence of xanthates does not effectively float non-ferrous sulphides from polymetallic ores.

Known compound N- (tetrahydradicyclopentadienyl) N ,, N -dimethylurea formula

, (CHj) jNooira-0; 3

previously used in flotation, not used in agriculture as a herbicide. The compound is practically non-toxic to humans (there may be disturbances in the activity of the gastrointestinal tract when large doses of herbicide are ingested in the stomach), readily soluble in water, is widely produced under the names Terbane. But, pea, Hercules 7535.

The purpose of the invention is to increase the efficiency of enrichment of sulfide ores containing polymetals, and expanding the range of reagents.

The goal is achieved by using N- (tetrahydrodicyclopentadienyl) N, N -dimethylurea of formula

 LSNz) 2SONN-QXl

as an additional collector in the flotation of polymetallic ores.

Example 1. Lead-zinc silver-containing ore with a lead content of 1.55%, zinc 1.50% and silver 19.5 g / t, weighing 1 kg is crushed in one stage in a ball mill at T: F 1: 0.5 to size 80% of the class - 74 tkm.

In the three-liter mechanical type fleet, the main and control flotation of sulphides, lead, zinc and silver is carried out. The concentrate of the main collective flotation is subject to two scans in a fleet of 0.75 liters.

Consistently served, g / t, in the main collective flotation:

copper sulfate 50 (agitation 2 min), butyl xanthate 75 (1 min), foaming agent T-66 15 (1 min; to the control collective flotation: sodium sulphide 50 (2 min), xanthoge 5 nat butyl 15 (1 min), blowing agent T -bb to (1 min).

The inventory operations of the bulk concentrate are carried out without the addition of reagents.

0 The tests of the wire. According to the scheme of a continuous process with the return to previous operations and consist of seven batches of ore, 1 kg each.

The reagents are used freshly prepared, clarified.

The time of the main collective flotation was 7 minutes, the control b minutes, the 1st cleaning of the bulk concentrate 4 minutes, the 11th cleaning of the minutes 3 minutes.

0 The consumption of N- (tetrahydrodicyclopentadinyl) S, H-dimethylurea (DMM) reagent varies from 5 to 20 g / ton of ore and is fed together with xanthate to the main and control collective flotation in the form of a 1% aqueous solution.

Solutions of xanthate and DMM are mixed immediately prior to dosing without first being held.

The results of ore beneficiation according to the factory mode (base object), as well as using urea as the additional collector and Amalgamated reagent L- (tetra hydrodicyclopentadienyl) N.N-dimethylurea are presented in Table. one.

 From the data obtained, it follows that the use of DMM significantly improves the enrichment indices of lead-zinc-silver-containing ore.

With given negligible reagent costs, an increase in the extraction of metals into a collective concentrate was obtained in all experiments. Lead extraction increases by 3.5-3.6%; zinc - by 2.6 - 4.0%, silver - by 3.4 - 5.4%.

PRI mme R 2. Reagent Hercules 7531, i.e. N- (tetrahydrodicyclopentadienyl) S, N-dimethylurea, has collective properties. Thus, the introduction of this reagent into the pulp conditioning instead of butyl xanthate after the supply of an activator of sulfide minerals — copper sulfate — allows to increase lead extraction to 88.2%, zinc to 85.0% and silver to 85.1%. These figures exceed the extraction of metals in the froth product during flotation

by a known method.

Modes of ore processing are summarized in table. 2

Thus, the use of the proposed reagent as an independent collector makes it possible to increase the extraction of zinc by 2% and silver by 0.8% in comparison with the known method of lead.

Thus, the main advantage of cocTOitT's invention in improving the technical performance of polymetallic ore flotation.

Table 1

Basic Collective object concentrate 5.83 23.20 21.00 Tails 94.17 0.21 0.29 Power 100, 1.55 1.50 (NHj) CO Collect (100 g / t) bulk concentrate 5.88 22, 90 21.74 Tails 94.12 0.21 0.28 Nutrition 100.0 1.54 1.54 Collections Provisional concentration 5, 9123.20.20.34 waste 94.090.170.23 Tails 100.01.531.48 Power Collective concentration 5, 8024.36. 22.06 expenses 94,200,160,23 Tails 100,01,5,51,50 Power Collective concentration 5, 9723,6021,51 waste 94,030, .150,23 Tails 100,01,551,50 Power 87,30 81,6 82,3 3,7 12, 70 18.4 i 17.7 19.5 100.0 100.0 100.0 283.9 87.40 83.00 84.3 3, 3 12.60 17.0 15.70 19.8 100.0 100.0 100.0 286.989,6285,286.95 5.0 2.7019.3814.813.05 19.5100.0100.0100.0 297.990.585.387.70 10.0 2.69.514.712.30 19.7100.0100 , 0100.0 286.090.9085.687.55 20 2.589.1014.412.45 19.5100.0100.0100.0

table 2

Claims (2)

The use of Ν- (tetrahydrocyclopentadienyl) Ν ', Ν ¹ -dimethylurea formula N,) _g ksota-00> ’As an additional collector in the flotation of polymetallic ores. with oo with one 1068173 2