CN105296747A - Comprehensive utilization method for low-grade complex ferromanganese ore - Google Patents
Comprehensive utilization method for low-grade complex ferromanganese ore Download PDFInfo
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- CN105296747A CN105296747A CN201510698367.XA CN201510698367A CN105296747A CN 105296747 A CN105296747 A CN 105296747A CN 201510698367 A CN201510698367 A CN 201510698367A CN 105296747 A CN105296747 A CN 105296747A
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Abstract
The invention discloses a comprehensive utilization method for low-grade complex ferromanganese ore. The comprehensive utilization method comprises the steps that raw ore is crushed to a certain particle size, and magnetic separation is conducted through a high-gradient magnetic separator; valuable elements such as Pb and Zn in tailings are recycled through flotation; sintering is conducted after flotation concentrate and magnetic concentrate are mixed uniformly; the sintered ore enters a blast furnace for smelting; and in the blast furnace smelting process, Pb deposits at the bottom of the blast furnace as liquid phases, Pb and molten iron are separated and recycled, Zn is enriched in blast furnace dust, Fe enters the next working procedure as molten iron, and Mn enters the slag phase and forms manganese-rich slag. In this way, various valuable elements in the complex refractory ferromanganese ore are utilized sufficiently. The method is easy to implement and reliable, energy consumption is low, various valuable elements in the raw ore can be recycled, and accordingly the economic benefits of mineral products are greatly increased. By means of the comprehensive utilization method, a feasible method and a reliable theoretical foundation are provided for the development and utilization of the low-grade ferromanganese ore.
Description
Technical field
The invention belongs to ore comprehensive reutilization field, relate to the method for a kind of low-grade complex Ferromanganese Ore comprehensive utilization.
Background technology
Iron, manganese element are the important elements of steel-making, and wherein, manganese element, as alloying element, can increase substantially steel hardness, gain in strength, and strengthen wear resistance.Iron and Steel Production is had great significance.Along with expanding economy, increasing to the needs of high quality manganese alloy steel.
Current China has a large amount of low-grade complex Ferromanganese Ores to be utilized, and it is low that such ore deposit has Fe, Mn element grade, and ore properties is complicated, is difficult to the feature sorted.If can not be developed, the wasting of resources can be caused.Namely the present invention relate to a kind of method of comprehensive utilization of low-grade complex Ferromanganese Ore.This raw ore, containing Fe25 ~ 27%, Mn9 ~ 11%, also has a small amount of valuable element such as Pb, Zn in addition.This ore Fe, Mn grade is lower, and character is complicated, and be difficult to obtain value product through simple ore dressing, the agglomerate ferrimanganic grade that direct sintering obtains cannot meet the requirement of blast-furnace smelting.
Patent (application number CN200710062305.5) discloses a kind of method processing low-grade manganese powder, by poor manganese ore powder through selected raw material, pulverizing, fine grinding, sieve, mix, stir, microwave oven preheating, carbon monoxide prereduction, reduction eventually, high temperature refining, nitrogen cooling protection, magnetic separation purification directly prepare low-carbon (LC) metal ferromanganese.Patent (application number CN201110300784.6) discloses a kind of method of preparing manganeisen from low grade manganese mine, it is the low-grade manganese oven dry of 15-30% by manganese metal content, mix with addition of reductive agent, catalyzer, flux and binding agent, this compound material is inserted in rotary kiln or tunnel furnace, using coal gas or Sweet natural gas as the energy, keep weakly reducing atmosphere in stove, react under certain temperature schedule, reacting rear material obtains manganeseirom and tailings through cooling, magnetic separation.A kind of method processing low-grade manganese mentioned by document " the recycling research of low-grade manganese carbonate ore ", and the raw ore by Mn8.11%, Fe3.41% uses sulfuric acid leaching process, and optimization experiment condition reaches quality product requirement.Document " research of the low-grade ferrous manganese ore of Magnetization reductive roasting process " refer to a kind of method processing low-grade manganese, the Ferromanganese Ore of Fe30-45%, Mn7-15% is carried out reducing roasting at reducing atmosphere under certain temperature system, roasting material carried out sulfuric acid leaching again.The equal flow process of above method is complicated.Patent (application number CN200710062305.5) and the disclosed method complicated operation of patent (application number CN201110300784.6), energy consumption is large, and cost high economic benefit is low.The method that document " the recycling research of low-grade manganese carbonate ore " and document " research of the low-grade ferrous manganese ore of Magnetization reductive roasting process " are mentioned all employs sulfuric acid leaching, this method complicated operation, and length consuming time, is unfavorable for suitability for industrialized production.And more than research does not make corresponding report to the recovery containing other valuable metal element, causes the wasting of resources.The present invention wants by ore dressing-sintering-Iron-smelting, reaches the object of various valuable metal and raising economic worth in comprehensive utilization raw ore, for the exploitation of such low-grade complex mineral products provide theoretical foundation.
Summary of the invention
For the current Problems existing of current low-grade complex Ferromanganese Ore process, namely ore dressing cannot obtain the product of economic worth, and direct sintering gained sinter quality cannot reach the requirement of blast furnace.The object of the present invention is to provide a kind of simple to operate, flow process is short, energy consumption is little, economic worth is high method, these mineral products are developed and utilized.
To achieve these goals, the method for comprehensive utilization of low-grade complex Ferromanganese Ore of the present invention: by low-grade complex Ferromanganese Ore crushing raw ore to-1mm, the raw ore after fragmentation uses magnetic plant to carry out magnetic separation, magnetic tailing floatation and recovery of lead, zinc; As raw materials for sintering after magnetic concentrate mixes with flotation concentrate; Blast-furnace smelting is carried out to the agglomerate after sintering; Reclaimed by Pb liquid bottom blast furnace, molten iron is used for steel-making, and Mn element enters blast furnace slag and forms Mn-rich slag mutually, and Zn volatilization is also reclaimed at blast furnace dust.
Low-grade complex Ferromanganese Ore raw ore described in aforesaid method, containing Fe25 ~ 27%, Mn9 ~ 11%, also has a small amount of Pb, Zn.
Use Wet-type high gradient magnetic separator to carry out magnetic separation in aforesaid method after crushing raw ore, magneticstrength is 1.1T ~ 1.3T.
Be 300 ~ 600g/t at multiplex xanthate consumption in aforesaid method, No. 2 oily consumptions are, under 0.03ml ~ 0.04ml/t condition, magnetic tailing is carried out flotation, reclaim Pb, Zn element in mine tailing.
In aforesaid method using after magnetic concentrate mixes with flotation concentrate as raw materials for sintering, be 8-10% at mixture moisture, fuel ratio is be prepared into agglomerate under 5-6% (solid fuel accounts for the per-cent of fuel and raw material total mass) condition.
In aforesaid method, agglomerate is reduced 3 ~ 4.5 hours in blast furnace, make that lead, iron, zinc fully reduce and manganese does not reduce; The enrichment bottom blast furnace of plumbous liquid after reduction is also reclaimed and is obtained plumbous product; Iron is the next process that molten iron enters smelting iron and steel; Zinc element contains enrichment in the dust of zinc at blast furnace and recycles; Manganese element enters blast furnace slag phase, as the Mn-rich slag product of Mn grade more than 25%.
Compared with prior art, the present invention has following advantage: by magnetic separation, improves the ferrimanganic grade of raw materials for sintering; The mine tailing of magnetic separation carries out flotation, is recycled by Pb, the Zn in mine tailing, improves economic benefit; Through oversintering, carbonate and sulfide-based mineral can be made to decompose, further increase element grade; Magnetic separation productive rate is high, and the tailings glass amount of flotation is few and do not need to regrind; As raw materials for sintering after magnetic concentrate mixes with flotation concentrate, substantially improve the size composition of raw materials for sintering and sintering finished rate is high; The process of blast-furnace smelting, recycles various valuable element, obtains the product being rich in this kind of element.This flow process operation is few, and operation is simple, and element recovery rate is high, and energy consumption is low, substantially increases the value of raw ore, for the exploitation in a large amount of low-grade complex ore deposits provide theoretical foundation.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
Be intended to further illustrate the present invention below in conjunction with embodiment, and unrestricted the present invention.
According to described method, products obtained therefrom parameter after each operation is contrasted respectively, is illustrated the present invention.
Carry out high-gradient wet magnetic separation after crushing raw ore, example is as follows:
Embodiment 1: for raw ore breeze, when magneticstrength is 1.1T ~ 1.3T, the rate of recovery of the rate of recovery of the productive rate of concentrate to be the rate of recovery of more than 88%, Fe be more than 90%, Mn to be the rate of recovery of more than 85%, Pb be more than 65%, Zn is more than 76%.
Embodiment 2: be 300 ~ 600g/t at multiplex xanthate consumption, No. 2 oily consumptions are under 0.03ml ~ 0.04ml/t condition, and concentrate yield is 23.87%, the Fe rate of recovery is 22.60%, the rate of recovery of the Mn rate of recovery to be the rate of recovery of 27.35%, Pb be 83.52%, Zn is 69.08%.
Embodiment 3: mixture moisture is about 9%, when fuel ratio is about 5.5%, sintered cup utilization coefficient is 0.765t/m
2h, yield rate is 64.26%, and barrate strength is 63.33%.
Embodiment 4: reduced in blast furnace 3 ~ 4.5 hours by agglomerate, lead water and molten iron and slag are respectively by exporting recovery separately, and in Mn-rich slag, Mn grade reaches more than 25%, and in dust, Zn grade is greater than 30%.
Claims (6)
1. a method of comprehensive utilization for low-grade complex Ferromanganese Ore, is characterized in that: by low-grade complex Ferromanganese Ore crushing raw ore to-1mm, and the raw ore after fragmentation uses magnetic plant to carry out magnetic separation, magnetic tailing floatation and recovery of lead, zinc; As raw materials for sintering after magnetic concentrate mixes with flotation concentrate; Blast-furnace smelting is carried out to the agglomerate after sintering; Reclaimed by Pb liquid bottom blast furnace, molten iron is used for steel-making, and Mn element enters blast furnace slag and forms Mn-rich slag mutually, and Zn volatilization is also reclaimed at blast furnace dust.
2. method according to claim 1, is characterized in that: described low-grade complex Ferromanganese Ore raw ore, containing Fe25 ~ 27%, Mn9 ~ 11%, also has a small amount of Pb, Zn.
3. method according to claim 1, is characterized in that: use Wet-type high gradient magnetic separator to carry out magnetic separation after crushing raw ore, and magneticstrength is 1.1T ~ 1.3T.
4. method according to claim 1, is characterized in that: be 300 ~ 600g/t at multiplex xanthate consumption, and No. 2 oily consumptions are, under 0.03ml ~ 0.04ml/t condition, magnetic tailing is carried out flotation, reclaims Pb, Zn element in mine tailing.
5. method according to claim 1, is characterized in that: using after magnetic concentrate mixes with flotation concentrate as raw materials for sintering, be 8-10% at mixture moisture, fuel ratio is be prepared into agglomerate under 5-6% condition.
6. method according to claim 1, is characterized in that: reduced in blast furnace 3 ~ 4.5 hours by agglomerate, makes that lead, iron, zinc fully reduce and manganese does not reduce; The enrichment bottom blast furnace of plumbous liquid after reduction is also reclaimed and is obtained plumbous product; Iron is the next process that molten iron enters smelting iron and steel; Zinc element contains enrichment in the dust of zinc at blast furnace and recycles; Manganese element enters blast furnace slag phase, as the Mn-rich slag product of Mn grade more than 25%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105714120A (en) * | 2016-04-12 | 2016-06-29 | 唐山市金岭工贸有限公司 | Comprehensive utilization method of low-quality ferromanganese ore slag and steel iron industrial waste |
| CN107602108A (en) * | 2017-09-11 | 2018-01-19 | 中南大学 | A kind of method that MnZn nickel ferrite magnetic material is prepared using low ore grade nickel resource |
| CN109868336A (en) * | 2019-03-12 | 2019-06-11 | 山东钢铁股份有限公司 | A kind of method of manganese content in control molten steel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105714120A (en) * | 2016-04-12 | 2016-06-29 | 唐山市金岭工贸有限公司 | Comprehensive utilization method of low-quality ferromanganese ore slag and steel iron industrial waste |
| CN107602108A (en) * | 2017-09-11 | 2018-01-19 | 中南大学 | A kind of method that MnZn nickel ferrite magnetic material is prepared using low ore grade nickel resource |
| CN109868336A (en) * | 2019-03-12 | 2019-06-11 | 山东钢铁股份有限公司 | A kind of method of manganese content in control molten steel |
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