CS205037B2 - Method of separating the magnetite - Google Patents

Abstract

Sepn. or concn. of magnesite from a comminuted raw material, contg. a magnesite and gangue mixt. The raw material is treated with reagents causing selective surface activation of magnesite or gangue mixt. and imparting different water-repellency to the magnesite- and gangue mixt. particles. Sepn. then takes place in an appts. generating a large water-air boundary surface zone, e.g. a vibrating table- or Humphrey's spiral concentrator. A (pre-)condensate can be obtd., depending on desired prod. quality. Reagent quantity needed for surface activation is smaller than reagent need in flotation. A coarse-grained material can be used in simple separating devices. Process can be used at any wt. ratio of gangue mixt. to useful fractions, giving high yields of concentrate.

Description

The present invention relates to separating ore-containing magnetite from a ore rock or to separating reactive rock from valuable minerals using selective surface activation of one of the minerals (valuable or reactive rock) and separating them at the air-water interface.

Separation of magnetite from venous rock containing. the ore is carried out by selective flotation using different hydrophobicity of the particles to be separated. Additives are used to reduce surface tension. on the “water-air” interface so that with air distribution. into the fine bubbles there was an increase in the surface of the mash. The reagents used are selectively absorbed on the surface of the ore-containing vein rock particles (in the case of magnetite ore, the rock consists predominantly of serpentine), making their surface hydrophilic while the remaining particles remain avid to water.

The ore treatment, separation, is carried out by machines operating with a significant air-water range, such as shaking tables or spiral enrichment machines, etc., thereby obtaining a high-enriched concentrate or preconcentrate.

The essence of the method of separating magnesite in ore from predominantly serpentine tailings se205037

Cl ·· '....... - Λ 2.

lektivní. by activating the surface. The particles according to the invention consist in: that is. The ore is treated with a mixture of - solvents consisting of 16. % Of quaternary ammonium salts of the general formula. ^CH 3.

alkyimethylammonium chloride, wherein

R1 is an alkyl of 8 to 16 carbon atoms and R2 is an alkyl of 6 to 18 carbon atoms, 79% by weight, diesel and 5-% by weight, flotol B, the ore treated in this way is mixed with water and the hydrophobic tailings are separated from of magnesite particles by wet screening.

In this method, the separation of magnetite from ore-containing vein rocks achieves an increased difference in the surface properties of the component due to the fact that neither the difference in their specific masses nor the part of their magnetic conductivity is sufficient for separation.

The procedure is as follows:

The ore is preferably crushed to a size of up to 2 mm or is obtained directly from a magnetite-mining plant and is separated from the tailings. . as the unprocessable fraction.

The red can also 'crush' to a mesh size of 4 mm and 'then sieve into two fractions:

(a) up to 2 mm; and

b) 2 to 4 mm.

Each fraction, after washing to clean the surface, is separately dispensed into a conditioner with suitable reagents mixed with water after their surface activation. Thereafter, depending on the circumference, the material is fed to shaking tables or spiral enrichment machines or similar enrichment devices. In these machines, the water-repellant particles are washed out by the water jet and separate from the water-retaining particles that remain at the bottom of the washing space and then drain off in a special way.

The advantages of the process according to the invention are as follows:

1. The required amount of particle surface conditioning reagents is less than that required when using flotation as a process for. separation.

2. The method requires a relatively coarse-grained material to be separated when released completely or partially at this size, thus avoiding the high cost of finely crushing the material.

3. Separation of mineral. is achieved at a very simple and relatively high efficiency. machines such as shaker tables or spiral enrichment machines.

4. The method can be used with success at any weight ratio of tailings and valuable components.

5. The valuable component is obtained in high yield.

Example

Magnetic ore of particle size up to 2 mm, containing 50% by weight of reactive minerals (serpentine, feldspar and quartz) and 50% by weight of magnetite, is washed and treated according to the process of the invention, wherein the conditioning is carried out with an aqueous mixture of quaternary ammonium salts. oil and Flotol B. ......

It should be noted that the reagent / water mixture is vigorously stirred in a mixer to make it into an emulsion.

The treatment time is approximately the time it takes for the material to pass through the helical sorting device where the treatment is performed.

After treatment, the material is dewatered and fed to shaker tables or spiral enrichment machines for separation to obtain a concentrate or precondensate according to the desired product quality grade.

The concentrate obtained in this process has the following chemical composition:

S1O2% 1.18

CaO O / o 1.59

Fe2O3. % 0.47

The batch processed on the spiral sorting machine has the following chemical composition: SIO2% 29.90

CaO% 1.20

Fe 2 O 3 o / o 5.56

Up to 90% by weight of magnetite is obtained from the raw material.

Claims (1)

PftEDMET INVENTION A process for separating manganite in ore from predominantly serpentine tailings by selective activation of the particle surface, characterized in that the ore is treated with a solvent mixture consisting of 16% w / w, quaternary ammonium salts of the formula alkylmethylammonium chloride, wherein R 1 is C 8 -C 16 alkyl; R2 is alkyl having up to 6 - 18 carbon atoms, 79 wt% diesel and ¹ 5% by weight, flotolu B, as follows. the treated ore is mixed with water and the hydrophobic tailings are separated from the magnesite particles by wet screening.