SU899070A1 - Foam suppressor - Google Patents

Description

one

FIELD OF THE INVENTION The invention relates to the flotation of minerals.

It is known to use as a defoamer a wide variety of flotation foams of higher fatty alcohols in the form of solutions in non-polar organic compounds, for example, in kerosene 1.

However, these reagents are quite expensive; moreover, when using antifoaming agents in the form of solutions in kerosene, thorough treatment of wastewater is required before they are discharged or used as recycled water.

Known use of formic acid as a reducing agent

21The purpose of the invention is to find a reagent that allows effective quenching of flotation foams at a low process cost and which does not require cleaning.

WATER before using them as negotiable.

The goal is achieved by the use of formic acid as an antifoam agent for trach phase foams.

The use of formic acid as an antifoam agent makes it possible to successfully quench a wide variety of flotation foams and use the wastewater obtained in

"On subsequent dewatering operations, as negotiable, without further purification from residual contaminants. Centers of reagent antifoam agent.

Example 1. Flotation apatna;

Before concentration, the 15th concentrate is treated with formic acid (0.15 kg / m), and then subjected to dehydration. Sands thickener come to filtering, and draining is used

20 are used as recycled water.

PRI mme R 2. Flotation) heloseal concentrate before thickening is treated with formic acid 38990 (0.1 kg / g). After the destruction of the foam, the product enters the dehydration, Example. 3. Similar to Example 1, but the concentrate is treated with technical formic acid containing j acetic and propionic acids (0.2 kg / t). In tab. 1 shows the results of experiments illustrating the effectiveness of the proposed anti-foaming agent in comparison with the experimental ones. Table 1 Apatite concentrate Higher alcohols fraction S.-Se 5 ° / For example 1 In example 2 15 25 Continued table. 1 Iron ore concentrate 1580 Higher alcohols fraction g / m-b According to example 2 From the data table. 1, it follows that the proposed reagent is a more effective defoamer than the known three-phase foam, its use is almost completely destroyed and, accordingly, losses with drains are reduced. In tab. 2 shows the results of experiments showing the possibility of using recycled water obtained during dehydration with the proposed reagents in the flotation process. From tab. 2 that circulating water containing formic acid does not affect the flotation results. table 2

Apatite concentrate

Higher alcohols fraction C - C.; p 1I

50 g / m

Following i

In example 3

Iron concentrate

Higher alcohols fraction C –C

in / iO

70 g / m Concentrate 28,58

36.1

83.2

9.6 19.7

57.13

Tails

In example 2

The expected annual economic effect from the implementation of the introduction of only one enterprise will be 75 thousand rubles.

Claims (2)

1. Reference enrichment of ores, vol. 2, p. 1, p. 287.  2. Zhirkov V.G. Organic chi. mi M.-L., 1966, p. 127.