CN105126995A - Iron separating method for metamorphic iron tailings - Google Patents

Abstract

The invention relates to an iron separating method for metamorphic iron tailings. According to magnetite, hematite, maghemite, goethite and limonite in the metamorphic iron tailings, the magnetic separation-flotation technology is adopted, and primary roughing, secondary scavenging and secondary concentration are carried out. By the adoption of the method, the problems that the iron separating recovery rate of the iron tailings is low and the recovery cost is high in all metamorphic iron tailing production countries for a long time are solved. Compared with the prior art, the method is free of pollution, capable of recovering soluble iron at a low cost, short in technological process, simple in technology, high in recovery rate, low in recovery cost and suitable for industrial production.

Description

Metamorphic type iron tailings selects iron method

Technical field:

The present invention relates to the spoil reclaming of one of a kind of metallic ore comprehensive utilization of tailing, especially metamorphic type iron tailings selects iron method.

Background technology:

Mineral resources are important substance bases of human survival and development, iron finds the earliest in the world, utilize the widest, a kind of metal that consumption is maximum, its consumption accounts for about 95% of metal total flow, with iron ore deposit fast Development be the continuing of iron tailings, pile up at a high speed, four ministries and commissions such as work letters in 2010 and information-based portion combine " metal tailings comprehensive utilization ad hoc planning (2010-2015 years) " that issue and are fully utilized by iron tailings and be listed in first of three emphasis tackling key problem fields.

The basic principle of current comprehensive utilization of tailing and improvement is resource, minimizing, innoxious, and Way To The Comprehensive Utilization of Mine Tailings is spoil reclaming and whole utilization two aspects mainly.

In mine tailing, trace meter selects recovery to be the effective means improving resource utilization again.The proportion that metamorphic type iron tailings accounts for China's mine tailing amount is higher, generally can be only iron in such mine tailing for recycling useful constituent.The iron ores such as current saddle this area have developed some magnetic separation, reselection technique reclaims iron, and Sichuan's iron ore exploitation goes out weight-magnetic-floating-electric separation flow process, has reclaimed titanium, sulphur, cobalt etc. from mine tailing.

The process of the mine tailing of metal mine is all problem demanding prompt solutions in countries in the world, and the most mine tailing of current China is not fully utilized, and comprehensive utilization ratio is less than 10%.Iron tailings as China's output, pile up maximum mine tailings, to advance and to accelerate the comprehensive utilization of iron tailings extremely urgent.

Metamorphic iron stone type has multiple, but only has magnetic iron ore in ore (mFe) at present compared with good utilisation, and other type soluble iron iron mineral does not all utilize.The composition of the type mine tailing has quartz, bloodstone, limonite, maghemite, goethite, magnetic iron ore, pyrite, hornblend and biotite etc.The different production phase, the mineral content of different regions the type mine tailing is different.General statistics, containing Fe17%-27%/T in the type mine tailing, have considerable part to be soluble iron (comprising magnetic iron ore, bloodstone, limonite, goethite, maghemite etc.), soluble iron accounts for 1/3 of full iron in mine tailing.If energy low cost, this part soluble iron of pollution-free recovery, not only can make iron ore deposit be fully used, simultaneously for the secondary of mine tailing utilizes the index providing and reduce content of beary metal, be conducive to remaining mine tailing facility brickmaking or reclaim.

In a word, the utilization rate of metamorphic type iron tailings is low, the partially recycled mFe of Jin You minority bargh, or with the brickmaking of coarse grain mine tailing, most of soluble iron does not still also have a kind of effective method to reclaim, and other grade mine tailing does not also utilize, not only occupation of land, contaminated environment, also waste resource.

Summary of the invention:

Object of the present invention is just for above-mentioned the deficiencies in the prior art, provides a kind of for the magnetic iron ore in metamorphic type iron tailings, bloodstone, maghemite, goethite, limonite, adopts the pollution-free low cost of magnetic separation-floatation process to reclaim soluble iron.

The object of the invention is to be achieved through the following technical solutions:

Metamorphic type iron tailings selects iron method, comprises the following steps:

A, metamorphic type iron tailings to be sieved, screen out the metamorphic type iron tailings of > 2mm;

The metamorphic type iron tailings of b, < 2mm adds adjusting agent sodium metasilicate 30 ~ 80g/t and sodium chloride 5 ~ 10g/t successively;

C, ball mill ore grinding are to-0.074mm;

D, magnetic separation, obtain magnetic tailing and part mFe, mFe reclaim;

E, magnetic tailing is adjusted ore pulp to 20%, then adds adjusting agent sodium carbonate 25 ~ 50g/t and non-polar oil 30 ~ 90g/t successively;

F, stirring 3 ~ 6 minutes, be placed in flotation cell, add collecting agent oleic acid 80 ~ 180g/t;

G, one roughing;

H, secondary are scanned;

I, recleaning;

J, acquisition iron ore concentrate and flotation tailing, flotation tailing continues to utilize as building materials auxiliary material.

Beneficial effect: the present invention be directed to the magnetic iron ore in metamorphic type iron tailings, bloodstone, maghemite, goethite, limonite proposes, and adopts magnetic separation-floatation process.The iron tailings solving the homogeneous existence of each metamorphic type iron ore producing country for a long time selects the difficult problem that iron recovery is low and cost recovery is high.The present invention is compared with prior art, pollution-free, and low cost reclaims soluble iron, and technological process is short, and technique is simple, and the rate of recovery is high, at the bottom of cost recovery, is suitable for suitability for industrialized production.

Accompanying drawing illustrates:

Accompanying drawing is that metamorphic type iron tailings selects iron method flow diagram

Detailed description of the invention:

Be described in further detail below in conjunction with drawings and Examples:

Metamorphic type iron tailings selects iron method, comprises the following steps:

A, metamorphic type iron tailings to be sieved, screen out the metamorphic type iron tailings of > 2mm;

The metamorphic type iron tailings of b, < 2mm adds adjusting agent sodium metasilicate 30 ~ 80g/t and sodium chloride 5 ~ 10g/t successively;

C, ball mill ore grinding are to-0.074mm;

D, magnetic separation, obtain magnetic tailing and part mFe, mFe reclaim;

E, magnetic tailing is adjusted ore pulp to 20%, then add adjusting agent sodium carbonate 25 ~ 50g/t and non-polar oil 30 ~ 90g/t successively;

F, stirring 3 ~ 6 minutes, be placed in flotation cell, add collecting agent oleic acid 80 ~ 180g/t;

G, one roughing;

H, secondary are scanned;

I, recleaning;

J, acquisition iron ore concentrate and flotation tailing, flotation tailing continues to utilize as building materials auxiliary material.

Embodiment 1

Get the 1000g of the rotten iron tailings screening in Liaoning < 2mm, add 40g/t sodium metasilicate successively, 5g/t sodium chloride, ore grinding, to-0.074mm magnetic separation, magneticly elects mFe, and magnetic tailing adjusts ore pulp to 20%, add 25g/t sodium carbonate successively again, non-polar oil 40g/t, stir 3.5min, enter flotation cell, add oleic acid 80g/t, roughly select 5.5min, once purging selection 5min, secondary scans 4.5min, primary cleaning 5min, recleaning 3min.Obtain iron concentrate grade 59.9%, the rate of recovery 90%.

Embodiment 2

Get the rotten iron tailings in Hebei to sieve the 1000g of < 2mm, add 30g/t sodium metasilicate successively, 8g/t sodium chloride, ore grinding, to-0.074mm, magneticly elects mFe, and magnetic tailing adjusts ore pulp to 20%, add sodium carbonate 30g/t successively, non-pole oiliness oil 30g/t, stirs 4.5min, enter flotation cell, add oleic acid 100g/t, roughly select 5.5min, once purging selection 5min, secondary scans 4.5min, primary cleaning 4min, recleaning 3min, obtains iron concentrate grade 60.8%, the rate of recovery 90.06%.

Embodiment 3

Get the rotten iron tailings in Jilin to sieve the 1000g of < 2mm, add 45g/t sodium metasilicate successively, 10g/t sodium chloride, ore grinding, to-0.074mm, magneticly elects mFe, and magnetic tailing adjusts ore pulp to 20%, add sodium carbonate 30g/t successively, non-polar oil 50g/t, after stirring 4min, enter flotation cell, add oleic acid 105g/t, once purging selection 5min, secondary scans 4.5min, primary cleaning 4min, recleaning 3min, obtains iron concentrate grade 62.9%, the rate of recovery 150%.

Embodiment 4

Get the rotten iron tailings in Shanxi to sieve the 1000g of < 2mm, add sodium metasilicate 50g/t successively, sodium chloride 10g/t, ore grinding, to-0.074mm, magneticly elects mFe, and magnetic tailing adjusts ore pulp to 20%, add sodium carbonate 40g/t successively, non-polar oil 60g/t, after stirring 5min, enter flotation cell, add oleic acid 120g/t, once purging selection 5min, secondary scans 4.5min, primary cleaning 4min, recleaning 3min, obtains iron concentrate grade 60.3%, the rate of recovery 91.6%.

Embodiment 5

Get the rotten iron tailings in Liaoning to sieve the 1000g of < 2mm, add sodium metasilicate 80g/t successively, sodium chloride 7g/t, ore grinding, to-0.074mm, magneticly elects mFe, and magnetic tailing adjusts ore pulp to 20%, add sodium carbonate 50g/t, non-polar oil 90g/t, after stirring 6min, enter flotation cell, add oleic acid 180g/t, once purging selection 5min, secondary scans 4.5min, primary cleaning 5min, recleaning 3min, obtains iron concentrate grade 61.6%, the rate of recovery 91.5%.

Claims (1)

1. metamorphic type iron tailings selects an iron method, it is characterized in that, comprises the following steps:

A, metamorphic type iron tailings to be sieved, screen out the metamorphic type iron tailings of > 2mm;

The metamorphic type iron tailings of b, < 2mm adds adjusting agent sodium metasilicate 30 ~ 80g/t and sodium chloride 5 ~ 10g/t successively;

C, ball mill ore grinding are to < 0.074mm;

D, magnetic separation, obtain magnetic tailing and part mFe, mFe reclaim;

E, magnetic tailing is adjusted ore pulp to 20%, then adds adjusting agent sodium carbonate 25 ~ 50g/t and non-polar oil 30 ~ 90g/t successively;

F, stirring 3 ~ 6 minutes, be placed in flotation cell, add collecting agent oleic acid 80 ~ 180g/t;

G, one roughing;

H, secondary are scanned;

I, recleaning;

J, acquisition iron ore concentrate and flotation tailing, flotation tailing continues to utilize as building materials auxiliary material.