SU1411034A1 - Method of dressing mixed iron ores - Google Patents

Abstract

The invention relates to the processing of minerals, in particular ferruginous quartzites, and m. used in the mining and metallurgical industries. The purpose of the invention is to increase iron recovery by transferring it from a non-magnetic to a magnetic form in a finely divided suspended (in foam) state. The original ore was crushed, crushed and subjected to the first magnetic separation with the production of magnetic and non-magnetic products. The latter is floated with a combustible gas as a blowing agent and flotation reagents. The tails are removed from the process, the froth product is subjected to a magnetizing roasting and after regrind is sent to re-magnetic separation with obtaining a magnetic product and tails. During the processing of iron quartzites with a total iron content of 40% (magnetic form 20–22%, non-magnetic 18–20%) iron ore concentrate was obtained with an iron content of 70–72% with its extraction of 96–98%. 2 Il. S (l

Description

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The invention relates to the processing of minerals, in particular ferruginous quartzites, and can be used in mining and metal. lurgicheskoy industrial.

The purpose of the invention is to increase the extraction of iron by transferring it from a non-magnetic to a magnetic form in a finely divided state in the foam.

FIG. 1 is a flow chart of FIG. 2 is a circuit diagram of devices used in the techno ™ logic circuit o15

The method is carried out in a skinny manner.

The original ore 1 (FIG. 2) is fed into the receiving bin 2 of fraction 1-shkn 3 Kpjnn- crushing and crushed to a particle size of 0 0-500 sh, then the ore is fed through conveyor 4 to the bunker 5 of crushed ore, and then using the plate feeder 6 into the mill 7, Then the classification is carried out in apparatus 8 25 (for example, in hydrocyclones, spiral classifier, etc.), and the classifier drain (92% of cells. -O, 074 mm) is fed to first magnetic separator 9.

Magnetic product 10 of the first magnetic separation is fed to the warehouse, 11 finished products, and tails 12 (non-magnetic: product of the first magnetic separation) are sent to the main flotation (RP) to the fumeOins 13, Tails 14 RP are subjected to control flotation (CF) in machines 15, for foaming, machines 13 are supplied with combustible gas 16 and flotation reagents. Penny-Pro ™ Dukt 17 KF return to the head of PF Tails. 18 KF withdrawn from the process, sent to the tailings dump 19,

Penny product 20 OF by gravity is sent to foam blowers 21, from where it is pumped into the combustion chamber 23 with compressed air 22 into the incineration chamber 23 and fired 24 (including gaseous components) with a water jet 25 is sent to grinding mill 26, and then to the classifier 27. The gaseous components released during the regrinding process are removed with the help of smoke exhausters (not shown). The discharge of the classifier 27 (95% cl. 0.054 mm) is sent to the 55 magnetic separator 28 for repeated

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magnetic repair, tails 29 of which are directed to tailing 19, and concentrate 30 to storage 11.

Example, Original ore (ferruginous quartzite) contains 40% iron in total, incl. the magnetic form is 20-22%, and the nonmagnetic form is 18-20%. After the first magnetic separation, the magnetismic product (iron ore concentrate 1, fig. 1) contains 60-65% of iron while extracting 53-55%. In the implementation of the flotation of iron minerals from a non-magnetic product of the first magnetic separation, tall oil is used as a foaming agent, and natural gas is used as a gas, which is supplied to the nozzles of flotation chambers, sealed, for example, with a Plexiglas sheath.

Famous pneumatic concrete pavers are used to inject froth flotation product. The combustion chamber is a pipe with a diameter of 1200 mm, lined from the inside with refractory material and inclined (up to 30 to the horizon). The penny product enters the combustion chamber through a nozzle with a flame-retardant mesh of refractory material. At the outlet of the combustion chamber, water is supplied to it through the nozzles. As a result of repeated magnetic separation, iron ore concentrate with an iron content of oi 70-72% is obtained, while its extraction is 96-98%.

Claims (1)

Invention Formula The method of enrichment of mixed iron ores, including crushing, grinding, first magnetic separation with obtaining magnetic and non-magnetic products and further processing of the latter by repeated magnetic separation and flotation, characterized in that in order to increase iron extraction by transferring it from non-magnetic to magnetic into finely weighed in the foam state, the non-magnetic product of the first magnetic separation is first {shoted with a combustible gas as a blowing agent, then the penny product is subjected to burning, regrinding and re-magpit separation. I Pokhodna ore. Splitting up f grinding t Magnetic separation (I) Magnetic product {walkway n center am 1) Foam foam {) rubberized  concentrate) --f- . Regrinding - A / A2 Separate Chi (P) G- I Kvos U fi3./ g- 1 Magnetic Nb / and product I () Elezorudt 1st Concentrate I I / tail - - ---- I Magnetic Product. g srlotatsi9 I QOSTAS I UI L I1 I / Tails .j OsJ ev