RU2371255C1 - Flotation method of beryllium-containing ores - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: invention relates to field of flotation enrichment of beryllium-containing ores. Method includes treatment of pulp by regulators and collector, main and cleaner procedures of flotation. In the capacity of depressor into cleaner procedures it is introduced thiourea in amount 0.5-3.0 kg/t, for depression of minerals-admixtures, fluorite or beryllium.

EFFECT: increasing of production data, reduction of content in concentrates admixtures, making difficult its following processing.

2 tbl, 2 ex

Description

The invention relates to the field of flotation concentration of beryllium-containing ores.

A known method of flotation of bertrandite, phenakite and beryl from ores (US Pat. US No. 3078997, NKI 209-166, 1961).

The method consists in treating the pulp with depressants: sodium fluoride, sodium polyphosphate or a mixture thereof with borax and flotation of a useful mineral with a fatty acid collector during basic and cleanup flotation operations in a slightly alkaline medium. By implementation, this method is closest to the proposed. It is selected as a prototype.

The disadvantage of this method is that it does not provide a sufficiently high technological performance, and the resulting concentrates are heavily contaminated with related minerals (for example, fluorite), which are harmful impurities for subsequent processing of concentrates.

The technical result of the invention is to increase technological parameters and reduce the content of impurities in concentrates that impede their subsequent processing.

The technical result is achieved by the fact that in the known method, which includes treating the pulp with regulators and a collector, the main and cleaning flotation operations, thiourea, in the amount of 0.5-3.0 kg / t, is introduced into the cleaning operations as a depressant for depression of impurity minerals fluorite or beryllium.

The introduction of thiourea into the main flotation stage was verified by flotation of beryllium fluorite ore. Thiourea treatment of the pulp before the main flotation does not significantly affect the process. Its submission to the cleaning operation at expenses of 0.5-3.0 kg / t leads to an increase in the extraction of valuable minerals in the concentrate as a result of a reduction in losses from the industrial product and the depressing of mineral impurities, for example fluorite.

Example 1. Conducted flotation of beryllium minerals from the enrichment product of beryllium-fluorite ore. The flotation diet contains 5-6% fluorite, 9% calcite, 12% vesuvian, 12% quartz, 50% feldspar, 1% phenakite, 1.5% bertrandite, 1.5% apatite, 7-8% iron hydroxide, mica and others.

According to the proposed method, flotation was carried out under the following conditions: the pulp was treated with sodium hydroxide (2 kg / t), soda (1.5 kg / t), TPF (2 kg / t), GIT (1.1 kg / t). The main flotation of beryllium minerals was carried out, thiourea in the amount of 1.5 kg / t was introduced into the flotation cleaning operations.

According to the method taken as a prototype, thiourea was not introduced into the process. The results are shown in table 1.

From the data of table 1 it follows that the proposed method in comparison with the prototype can increase the extraction of beryllium oxide by 0.3% and reduce the content of CaF ₂ , which is a harmful impurity for subsequent hydrometallurgical processing, by 5.83% absolute (37.4 % relative).

Example 2. Fluorite was flotated from fluorite-beryllium ore containing 24% fluorite, 7-8% calcite, 8% vesuviana, 10% quartz, 43% feldspar, 0.8% phenakite, 1.2% bertrandite, 6% hydroxides of iron, apatite and other minerals.

According to the proposed method, flotation was carried out under the following conditions: the crushed ore was treated with sodium fluoride (0.5 kg / t), liquid glass (0.5 kg / t), GIT (0.3 kg / t) and the main flotation was carried out and 7 cleanings concentrate when fed to the cleanings of water glass and sodium fluoride. With liquid glass and sodium fluoride, the pulp was treated at a temperature of 70 ° C for 10 min; additionally, thiourea was introduced at a flow rate of 0.5 kg / t in 5-7 treatments.

Table 1 The results of beryllium flotation,% Product Exit Beo CaF ₂ Conditions Content Extraction Content Extraction Beryllium concentrate 11,2 9.56 93.1 9.78 19.1 The proposed method Tails 88.8 0.09 6.9 5.23 80.9 Beryllium Flotation Nutrition 100.0 1.15 100.0 5.74 100.0 Beryllium concentrate 10.9 9.20 86.9 15.61 30,2 Prototype Tails 89.1 0.17 13.1 4.41 69.8 Beryllium Flotation Nutrition 100.0 1.15 100.0 5.63 100.0

According to the method taken as a prototype, thiourea was not supplied to the process.

The results are presented in table.2.

From the results it follows that the proposed method in comparison with the prototype allows to increase the extraction of CaF ₂ in fluorite concentrate by 1.8% while reducing the content of beryllium in it, which pollutes the environment during the processing of fluorite concentrates and worsens working conditions, by 47.4% relative .

Thus, the proposed method in comparison with the known one can improve the technological parameters of flotation, increase recovery by 1.8-6.2%, increase the quality of concentrates by 0.3-0.4% and reduce the content of impurities in them by 37-47% relative.

table 2 Fluorite flotation results,% Product Exit Beo CaF ₂ Conditions Content Extraction Content Extraction Fluorite concentrate 17.0 0.10 1,6 93.8 67.6 The proposed method Tails 83.0 1.34 98.4 9.2 32,4 Source ore 100.0 1.13 100.0 23.6 100.0 Fluorite concentrate 16.6 0.19 3.05 93.5 65.8 Prototype Tails 83,4 1.20 96.95 9.7 34.2 Source ore 100.0 1,03 100.0 23.6 100.0

Claims (1)

A method of flotation of beryllium-containing ores, including treating the pulp with regulators and a collector, the main and cleaning flotation operations, characterized in that thiourea in the amount of 0.5-3.0 kg / t is introduced into the cleaning operations as a depressant for depression of mineral impurities, fluorite or beryllium.