SU1207498A1 - Method of opposite flotation of iron ores - Google Patents

Description

one

The invention relates to the enrichment of minerals and can be used in the flotation enrichment of iron ores to separate silicate minerals (quartz, mica, amphibole, cummingtonite, pyroxenes, etc.), in particular, in the preparation of high purity magnetite concentrates (superconcentrates) for powder metallurgy.

The purpose of the invention is to improve the technological performance while reducing the consumption of the collector and increasing the flotation rate due to the increased flotation activity of the collector.

The method according to the comparison with the known provides for obtaining higher technological parameters in the process of flotation of difficultly-enrichment magnetite ores.

The magnetite concentrate of the Vasinovskoye field with a particle size of 98% AO µm class containing 71% iron and 0.7% silica was subjected to flotation concentration.

The concentrate was floated using the known and proposed methods at variable costs of collectors. The flotation scheme consisted of one operation in which the silica-rich pen product was a domain concentrate and the chamber product was a masterbatch. The experiments were performed in an open cycle on a laboratory FM-2M flotomachine with a 150 ml chamber. Hitch 40 g, T: W in air conditioning is 1: 1, in flotation 1: 3. The duration of the conditioning with the collectors is 3 minutes, the duration of flotation is 1.5-3 minutes

The following cationic reagents were tested as collectors: the quaternary ammonium salt - alkyltrimethylammo.iichloride (alkyl C17 - Cgo) salt (chloride) of a tetramethylethylenediamine based bis-quaternary ammonium base with the length of the C radicals, independently and in a mixture with the distance C, in the mixture with the distance of the mixture C, you must mix the mixture with the distance of the mixture C using the mixture of the distance of C and C, but with the mixture of the mixture and the mixture, the mixture of the mixture C and C is used.

rum monochloroacetic acid: technical etonium, containing 75% bis-quaternary salt C ,, - C, j and 4% monochloroacetic acid ester with such

5 same radical length; Bis- (S, K-dimethyl-H-carbalkoxymethyl-K-ethylene ammonium) -sulfide dichlorides containing radicals C, C, C, C, -C and technical product containing

 About up to 75% of a sulfur-containing salt with a length of radicals C, (J (technical thionium), which is a waste product of the medical product thionium.

Typical flotation results

 5 magnetite concentrate are given in the table (average of 3-5 experiments). The proposed method can be obtained superconcentrate with a silica content of 0.20-0.19% with

20 exit 77.9-74.6%. The collector consumption is 550-250 g / t, depending on the length of the hydrocarbon radicals. Optimal collective and selective properties has

25 salt with a length of hydrocarbon radicals C42. With the consumption of this salt of 250 g / t, a superconcentrate was obtained with a content of 0.19% silica at a yield of 74.6%.

30 By a known method with the use of bis-quaternary salts in the amount of 600-800 g / t, superconcentrates with a silica content of 0.28-0.25% can be obtained, which corresponds to a lower grade. With the use of the quaternary ammonium salt - alkyltrimethylammonium chloride - as a collector, No master concentrate with a silica content below 0.35% was obtained.

The application of the proposed method also makes it possible to increase the flotation rate by 1.7-1.3 times as compared with the known methods, that

45 helps to increase the productivity of the process.

An additional advantage of the proposed method is the possibility of using technical

50 thionium, which is a cheap effective reagent.

Alkyltrimethyl ammonium chloride (alkyl C Sgo)

500

Bischetvertichny salt based on tetramethylethylenediamine

(R s, „)

Bischetvertichny salt based on tetramethylethylenediamines (R C, 0)

Bischetvertichny salt based on tetramethylethylene diamines

(R C, o). mixed with monochloroacetic acid decyl ester (4%)

2.5

2.0

2.0

2.0

Table continuation

Claims (2)

METHOD OF REVERSE FLOTATION OF IRON ORES, including preliminary conditioning of pulp with a cationic collector of silicate minerals and their subsequent isolation into a foam product, characterized in that, in order to increase technological parameters while reducing the collector flow rate and increasing the flotation rate by increasing the collector flotation activity, as a cationic collector is introduced into conditioning sulfur-containing bis-quaternary salts - bis- (S, 11-dimethyl-S-carbalkoxymethyl-K-ethyleneammonium) dichloride ide of formula + _n CH ₂ sn _g COOR COOR 2C1 where R is a hydrocarbon radical with the number of carbon atoms from '7 to 18. 1 1207498 ²