SU451457A1 - Granulation method for flotation concentrates - Google Patents

Description

one

This invention relates to a granulation technique for flotation concentrates, for example, potash concentrates, which consist in compressing the concentrate, followed by crushing and classification.

The granulation process of flotation concentrates is hampered by the sorption layers of the collector, hydrophobing the surface and weakening the bond between the grains of the mineral. The treatment with lightly condensed vapors of alcohol, acetone, ether, which makes it possible to increase the strength of the granules obtained by the pressing method in the absence of a collector, does not affect the granulation of flotation concentrates.

The purpose of the invention is to increase the strength of the granules.

For this, the flotation concentrate is treated with a syntan or an alkaline solution of a collagen-thaiide reagent before pressing. Treatment with reagents is carried out to concentrate concentrate.

Experimental technique is as follows. A portion of the concentrate is stirred for a certain time with the mother liquor, to which a hydrophilisation reagent — 10% solution of syntan is added. After contacting with the reagent, the concentrate is filtered, dried and the remaining amine content is determined (analysis of amine

conducted by the standard method of Silvershteyn-Lariq). On a hydraulic press, tablets are prepared from the concentrate and their fracture strength is determined.

FIG. 1 shows a plot of the amine content (g / t) on a wet concentrate and its strength (kg / cm) versus the consumption of a colagenotanide reagent (g / t); in fig. 2 - the same for syntan; in fig. 3 and 4 are the same for dry concentrate.

Example 1. The moisture content of the initial concentrate is 9.8%, the amine content is 230 g / t in the wet cake and 190 g / t after the bitch. Contact with reagents is carried out in the mother liquor at a ratio of 3 for 30 seconds. As can be seen from FIG. 1 and 2, as the flow rate of the hydrophilizer increases, the amine content decreases and the press strength increases, approaching 73 kg / cm. Exactly like this

strength is compressed chemically pure potassium chloride. Collagen-tannid reagent (CTE) has the most activity, with a consumption of about 1 kg / t of concentrate strength, the press increases

from 45 to 67 kg / cm. With an increase in consumption to 2 kg / t, the strength increases to 71 kg / cm, i.e., it reaches the maximum possible value. The effectiveness of the CTE may be enhanced by adding a certain amount of alkali to it. In case of use