SU1191113A1 - Method of benefication of iron ores - Google Patents

Description

The invention relates to the beneficiation of minerals and can be used in the flotation beneficiation of iron ores.

The purpose of the invention is the expansion of the range of reagents while reducing their cost.

The use of tall lignin and vat residues of synthetic fatty acids (COSFA), which are unutilized wastes, the cost of which is equal to the cost of their transportation (40 rubles / ton), allow '. replace the expensive reagent is scarce and cheaper process flotation ₅ onnogo enrichment.

Vat residues of synthetic fatty

acids (KOSZHK) are waste oil industry. In tab. 1 shows their characteristics according to GOST 8622-57.

Table 1

Indicators

Norms

Appearance and properties

Acid number, mg KOH per 1 g

Essential number, mg KOH per 1 g

Fatty acid content,%

Product from solid to ointment, from light brown to dark brown

Not less than 100

Not less than 40

Not less than 85

An example of a specific implementation of the described method.

Obtained after magnetic separation in a strong field, the intermediate product containing 49% iron was crushed to a particle size of 90% of class 0.044 mm with a solid-to-liquid ratio of 1: 2, the resulting pulp was treated for 3 minutes with caustic

soda in the amount of 1200 g / t, a mixture of nitrolignin and CMC with a ratio of 2: 1 after the latter in the amount of 300 g / t and for 0.5 min with a mixture of tall lignin and KOSHK in the amount of 600 g / t.

Here are the comparative indicators of iron ore enrichment according to the proposed and known methods (see table 2).

table 2

Gatherers Indicators of enrichment,% Note Output Iron content in concentrate, % Extract Washed tall oil residue 67.0 64.0 87.5 Prototype Washed tall butter 67.0 60.1 82.2 Analog Tall lignin 80.0 56.1 91.6 Analog KOSZHK No flotation Analog

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From the data presented in the table, it follows that the use of tall lignin and COSFA mixtures, mainly in accordance with 19: 1–2.3: 1, allows to obtain flotation rates higher than the corresponding indicators obtained when using saponified tall oil residues as a collector. oils due to the excessive foaming capacity of the latter. Thus, the iron content in the flotation concentrate, obtained by using the proposed mixture of tall oil ligcin and KOSHK as a collector with a ratio of components of 19: 1–2.3: 1, respectively, is 62.8–63.8% with a yield of 67.0%

₅ and extraction, respectively, 85.9-87.2%. When used as a collector of saponified stilted bottoms of tall oil, the iron content in the flotation concentrate is 60.1% with a yield of 67.0% and recovery of 82.2%.

ten

Claims (2)

1. A method of enrichment of iron ores, including sequential conditioning of the pulp with the environmental regulator, iron minerals depressant, activator of nonmetallic minerals, the introduction of fatty acid collector and the flotation of nonmetallic materials bottoms of synthetic fatty acids. 2. The method according to π. 1, characterized in that the ratio of tall lignin and bottoms of synthetic fatty acids in the mixture is 19: 1–2.3: 1. 1191113 one 2