CN109825698A - A method of high titanium products and sponge iron are produced with titanium-containing iron ore stone and coal slime - Google Patents
A method of high titanium products and sponge iron are produced with titanium-containing iron ore stone and coal slime Download PDFInfo
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- CN109825698A CN109825698A CN201811384494.2A CN201811384494A CN109825698A CN 109825698 A CN109825698 A CN 109825698A CN 201811384494 A CN201811384494 A CN 201811384494A CN 109825698 A CN109825698 A CN 109825698A
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Abstract
The invention belongs to comprehensive utilization of resources field scopes, it is about a kind of method for producing high titanium products and sponge iron as raw material using coal slime and titanium-containing iron ore stone, this method uses solid waste coal slime as reducing agent, bentonite is as binder, sodium carbonate and calcium carbonate are as additive, briquetting is mixed with titanium-containing iron ore, then drastic reduction roasting obtains roasted product, and high titanium products and sponge iron product can be obtained by two stage grinding-magnetic separation.Present invention process method is simple, the coal slime of solid waste is not only set to realize that recycling recycles, avoid the coal dust of higher operating costs, and hardly possible is realized by the effect of additive, the ferrotianium of titanium-containing iron ore stone is selected to efficiently separate, the high titanium products that content of titanium dioxide is greater than 25% may finally be obtained, Iron grade is greater than 92% sponge iron product, and the titanium dioxide rate of recovery of the method is generally higher than 91%, iron recovery is generally higher than 86%, has achieved the purpose that comprehensive utilization of resources.
Description
Technical field
The invention belongs to comprehensive utilization of resources field, provide it is a kind of with titanium-containing iron ore stone and coal slime produce high titanium products and
The method of sponge iron.
Background technique
With the high speed stable development of China's economic, China Steel production scale is also increased rapidly, however due to Chinese iron
Ore has the characteristics that poor, thin and miscellaneous, causes more difficult sorting to utilize, so needing a large amount of imported Fe ores.It is Chinese right according to statistics
The interdependency of outer iron ore alreadys exceed 80%, and from the point of view of national strategy, the supply of China's iron ore must not rely on for a long time
Import.Therefore, other iron-containing mineral resources of reasonable development become inevitable, and wherein titanium-containing iron ore is exactly one of them.Titanium is one
Kind rare metal is difficult to extract because dispersing in nature preservation, so, titanium-containing iron ore useful element is extracted in exploitation
Process also becomes important topic.And ilmenite is a kind of grandidierite of multiple metallic element symbiosis, being total to based on iron content, titanium
Raw vignite, due to the close symbiosis of its ferrotitanium, most of titanium and iron mineral in titanomagnetite, are caused with isomorph preservation
Conventional beneficiation method is difficult to achieve the purpose that resource reclaim.For example, using the work of " the strong magnetic preenrichment-titanium flotation of weak magnetic separation iron-"
Although skill process recycling valuable metal processing titanium-containing iron ore obtains higher Iron grade product and titanium grade product respectively, iron and
The rate of recovery of titanium it is limited (Gansu the such as Nie Qingmin titanium-containing iron ore Experimental study on ore dressing [J] non-ferrous metal scientific and engineering,
2016,7 (2): 99-103).Iron is received using raw ore weak magnetic to certain ultra-poor vanadium titano-magnetite, iron rough concentrate regrinds rear selected, iron
The too strong magnetic of rougher tailings, high intensity magnetic mineral are closed with magnetic reconnection after regrinding and receive titanium, and strong magnetic tail mine selects phosphorus, and phosphorus flotation operation one slightly sweeps four
Secondary selected method, though obtaining Iron grade is 67.53%, the different product that titanium grade is 23.10% in ilmenite concentrate, iron synthesis
The rate of recovery and not high (resource comprehensive utilization [J] the mine of the ultra-poor vanadium titano-magnetite in the Hebei the such as Luo Bin somewhere of the rate of recovery of titanium
Industry exploitation and research, 2017,37 (2): 87-92).Contain TFe 17.92% for certain low-grade vanadium titano-magnetite, contains TiO2
6.19% uses dry type tailings discarding by preconcentration-Staged grinding and staged separation technique method, although realizing, the members such as iron, titanium, vanadium, chromium
The enrichment of element, but full iron recovery is not high, and be not carried out titanium and iron efficiently separates (old superfine low grade vanadium titanium
Magnetic iron ore selects iron tests and selects element trend [J] steel vanadium titanium during iron, 2018,39 (2): 85-91).But because not
Suitable additive is found, is not that the dephosphorization additive amount chosen is big and cause at high cost in actual production, exactly uses coal
High cost caused by reducing agent is done, it is entitled " to pass through coal-based direct reduction roasting point such as patent " CN 201310029638.3 "
Additive therefor is sodium carbonate and Boratex in technique from iron and titanium in the titanomagnetite of beach ", and reducing agent is coal dust, makes cost
Increase, and complex process.
On the other hand, generating a large amount of solid waste coal slimes not yet during the coal washing coal separation of coal industry can have completely
Effect utilizes.With the sustainable development of Coal Industry of China, it is contemplated that the year two thousand twenty China raw coal output will up to 4,500,000,000 tons, if according to
It is required that 80% will washing, selected total amount will be more than 3,600,000,000 tons, and coal slime yield will be more than 300,000,000 tons at that time.However, coal slime has
The features such as moisture content is high, has retentiveness strong, and stickiness is big, content of ashes is high, except small part is as boiler combustion, production type
Coal, formed coke are outside, and most of to be stored up, this way can not only occupy large amount of land resources, and the fugitive dust of formation also results in ring
Border pollution.Most of all, this also results in the huge waste of resource because it contains fraction solids carbon resource.
In order to realize the development and utilization of titanium-containing iron ore and the renewable resources utilization of solid waste coal slime.The present invention is to contain
Ilmenite and coal slime are raw material, using bentonite as binder, sodium carbonate and calcium carbonate as additive, drastic reduction roasting
The method that burning-magnetic separation method produces high titanium content product and sponge iron product, achievees the purpose that comprehensive utilization of resources.
Summary of the invention
The present invention provides a kind of methods for producing high titanium products and sponge iron with titanium-containing iron ore stone and coal slime.By hardly possible choosing
Titanium-containing iron ore and the comprehensive utilization of solid waste coal slime, extract the iron and titanium resource in titanium-containing iron ore, utilize the solid in coal slime
Carbon produces high titanium content product and sponge iron product.Reach simplification of flowsheet, reduce product cost, comprehensive utilization of resources
Purpose.
The technical scheme is that a method of high titanium products and sponge iron are produced with titanium-containing iron ore stone and coal slime,
This method is with solid waste coal slime reducing agent, and bentonite is as binder, sodium carbonate and calcium carbonate as additive to containing
Ilmenite drastic reduction roasting-magnetic separation produces high titanium content product and sponge iron product, realizes the mesh that resource comprehensive utilization utilizes
's.Iron grade is finally obtained greater than 91%, iron recovery is greater than 86% sponge iron product, and content of titanium dioxide is greater than 25%, dioxy
The rate of recovery for changing titanium is greater than 91% high titanium products.Sponge iron product can be directly as steelmaking feed.
Specific steps and the condition for implementing the program are as follows: the first step, and the titanium-containing iron ore that granularity is 50cm ~ 5cm is crushed
It is -2 mm to granularity 100%, solid waste coal slime is added later as reducing agent, while binder, additive, coal is added
Mud, binder are different and different according to titanium-containing iron ore property with the dosage of additive.Titanium-containing iron ore and coal slime mass ratio are 1:
(0.31 ~ 0.38), binder are bentonite, and titanium-containing iron ore and bentonite mass ratio are 1:(0.04 ~ 0.07), additive is carbon
Sour sodium and calcium carbonate, titanium-containing iron ore and additive mass ratio are 1:(0.06 ~ 0.12)；Later, by 8cm × 6cm × 4cm pressure
Block is put into roasting crucible, 35 ~ 60 min of reduction roasting in the Muffle furnace that temperature is 1260 DEG C ~ 1350 DEG C, is obtained roasting and is produced
Product, the drastic reduction temperature and time in practical methods is different according to ore properties, and actual experiment is needed to determine.Second step,
Wet grinding, ore grinding are divided into two stages to roasted product after cooling, and initial ore grinding mass concentration is 60%, and first segment ore grinding produces
- 0.074 mm of product fineness is 70%, and second segment grinding fineness is that -0.043 mm is 80%, and two stage grinding products obtained therefrom is in magnetic field
Intensity is magnetic separation under the conditions of 1.7 ~ 2.0 kGs, finally obtains high titanium products and sponge iron product.The purpose of broken-wet grinding
It is to make iron and titanium and gangue mineral monomer dissociation in roasted product, while realizing the separation of iron and titanium, wet grinding product is through magnetic
Choosing can obtain Iron grade greater than 91%, and iron recovery is greater than 86% sponge iron product, and content of titanium dioxide is greater than 25%, dioxy
The rate of recovery for changing titanium is greater than 91% high titanium products.
Bentonite of the present invention is binder, and additive is sodium carbonate and calcium carbonate, using process of the invention,
The ferrotianium resource that titanium-containing iron ore can effectively be extracted, also makes the coal slime of solid waste be utilized effectively, to reach resource
The purpose of comprehensive reutilization.
Compared with the conventional method, the method for the present invention has the advantages that the 1. effective use to solid waste coal slime, one
Aspect avoids the relatively high coal dust of use cost, reduces production cost；On the other hand change solid waste coal slime
For price product, secondary pollution of the coal slime dust to environment is also avoided；2. providing one in drastic reduction roasting-magnetic separation process
The more cheap additive of kind is used for the production of titanium-containing iron ore.Using the method that this technique provides while effectively reducing cost
Also available Iron grade is greater than 91%, and iron recovery is greater than 86% sponge iron product, and content of titanium dioxide is greater than 25%, dioxy
The rate of recovery for changing titanium is greater than 91% high titanium products；3. the realization that titanium-containing iron ore and coal slime common resource utilize, improves resource
Comprehensive utilization ratio is conducive to the construction of conservation-minded society；4. can be realized higher economic value.To titanium-containing iron ore and coal
The efficient of mud also saves coal resources using the source for not only expanding titanium and iron resource, to the raising performance of enterprises, Environmental Effect
Benefit and economy of resources effect are obvious.5. the present invention becomes the difficult exploitation of titanium-containing iron ore stone selected and the comprehensive reutilization of coal slime
May, this had both created good environmental benefit, but also titanium resource obtains reasonable development and improves the supply of China's iron ore
The long-term status for relying on import.
Detailed description of the invention:
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of work for the method that high titanium products and sponge iron are produced with titanium-containing iron ore stone and coal slime in present embodiment
Skill flow chart.
Specific embodiment:
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
Embodiment 1:
The titanium-containing iron ore stone Fe grade that certain tcrude ore granularity is 50cm ~ 15cm is 40.28%, TiO2Grade is 8.25%.It adopts
With the method for the present invention, it is 1:0.04 with bentonite mass ratio, with sodium carbonate and carbon that titanium-containing iron ore and coal slime mass ratio, which are 1:0.32,
The calcareous amount of acid is pressed into 8cm × 6cm × 4cm block after mixing later, briquetting is put into than being respectively 1:0.015 and 1:0.06
It roasts in crucible, 60 min of reduction roasting obtains roasted product in the Muffle furnace that drastic reduction temperature is 1260 DEG C, and roasting produces
Wet grinding, initial ore grinding mass concentration are 60% to product after cooling, and -0.074 mm of first segment ore milling product fineness is 70%, the
Secondary grinding fineness is that -0.074 mm is 85%, magnetic separation under the conditions of magnetic field strength is 1.7kGs of two stage grinding products obtained therefrom,
Obtaining content of titanium dioxide is 25.56%, the high titanium products that the titanium dioxide rate of recovery is 95.83%, Iron grade 91.45%, iron recycling
The sponge iron product that rate is 92.86%.
Embodiment 2:
The titanium-containing iron ore stone Fe grade that certain tcrude ore granularity is 50cm ~ 10cm is 45.62%, TiO2Grade is 12.56%.It adopts
With the method for the present invention, it is 1:0.05 with bentonite mass ratio, with sodium carbonate and carbon that titanium-containing iron ore and coal slime mass ratio, which are 1:0.34,
The calcareous amount of acid is pressed into 8cm × 6cm × 4cm block after mixing later, briquetting is put into than being respectively 1:0.015 and 1:0.085
It roasts in crucible, 50 min of reduction roasting obtains roasted product in the Muffle furnace that drastic reduction temperature is 1300 DEG C, and roasting produces
Wet grinding, initial ore grinding mass concentration are 60% to product after cooling, and -0.074 mm of first segment ore milling product fineness is 70%, the
Secondary grinding fineness is that -0.043 mm is 80%, magnetic separation under the conditions of magnetic field strength is 1.8 kGs of two stage grinding products obtained therefrom,
Obtaining content of titanium dioxide is 28.38%, the high titanium products that the titanium dioxide rate of recovery is 98.67%, Iron grade 91.53%, iron recycling
The sponge iron product that rate is 92.79%.
Embodiment 3:
The titanium-containing iron ore stone Fe grade that certain tcrude ore granularity is 45cm ~ 5cm is 54.67%, TiO2Grade is 14.86%.It adopts
With the method for the present invention, it is 1:0.07 with bentonite mass ratio, with sodium carbonate and carbon that titanium-containing iron ore and coal slime mass ratio, which are 1:0.38,
The calcareous amount of acid is pressed into 8cm × 6cm × 4cm block after mixing later, briquetting is put into than being respectively 1:0.015 and 1:0.10
It roasts in crucible, 36 min of reduction roasting obtains roasted product in the Muffle furnace that drastic reduction temperature is 1350 DEG C, and roasting produces
Wet grinding, initial ore grinding mass concentration are 60% to product after cooling, and -0.074 mm of first segment ore milling product fineness is 70%, the
Secondary grinding fineness is that -0.043 mm is 80%, and magnetic separation under the conditions of magnetic field strength is 2kGs of two stage grinding products obtained therefrom obtains
Obtaining content of titanium dioxide is 30.23%, the high titanium products that the titanium dioxide rate of recovery is 98.67%, Iron grade 94.53%, iron recovery
For 88.01% sponge iron product.
This method can efficiently use solid waste coal slime, on the one hand avoid the relatively high coal of use cost
Powder reduces production cost；On the other hand so that solid waste coal slime is changed into price product, also avoid coal slime dust to ring
The secondary pollution in border；
Using the method that this technique provides, also available Iron grade is greater than 91% while effectively reducing cost, and iron returns
Yield is greater than 86% sponge iron product, and content of titanium dioxide is greater than 25%, and high titanium of the rate of recovery greater than 91% of titanium dioxide produces
Product；
This method realizes titanium-containing iron ore and the common resourceization of coal slime utilizes, and improves comprehensive resource utilization rate, favorably
In the construction of conservation-minded society；
This method not only expands the source of titanium and iron resource to the efficient utilization of titanium-containing iron ore and coal slime, also saves coal
Charcoal resource acts on obviously the performance of enterprises, environmental benefit and economy of resources is improved；
The present invention make it possible difficult choosing titanium-containing iron ore stone exploitation and coal slime comprehensive reutilization, this was both created
Good environmental benefit, but also titanium resource obtains reasonable development and improves showing for the long-term dependence import of supply of China's iron ore
Shape.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of method for producing high titanium products and sponge iron with titanium-containing iron ore stone and coal slime, which is characterized in that it includes step
(1) raw material agglomeration, step (2) reduction roasting, step (3) magnetic separation；It is specific:
Step (1) the raw material agglomeration: being crushed to granularity -2mm for titanium-containing iron ore stone and account for 100%, be added reducing agent, binder and
Additive, agglomeration after mixing, obtains block；
Step (2) reduction roasting: being warming up to 1260 DEG C~1350 DEG C for the block, and drastic reduction roasts 35~65min,
Obtain roasting material；
Step (3) magnetic separation: the roasting material is handled by ore grinding, obtaining fineness is the ore grinding that -0.074mm accounts for 85%
Material, then magnetic separation under the conditions of magnetic field strength is 1.7~2.0kGs obtain the sponge iron product that Iron grade is greater than 91%, and
Content of titanium dioxide is greater than 25% high titanium products.
2. a kind of method for producing high titanium products and sponge iron with titanium-containing iron ore stone and coal slime according to claim 1, special
Sign is, in the step (1) raw material agglomeration, the titanium grade of the titanium-containing iron ore stone is 8%~15%, Iron grade 40%
~55%.
3. a kind of method for producing high titanium products and sponge iron with titanium-containing iron ore stone and coal slime according to claim 2, special
Sign is, in the step (1) raw material agglomeration, the reducing agent is coal slime.
4. a kind of method for producing high titanium products and sponge iron with titanium-containing iron ore stone and coal slime according to claim 3, special
Sign is that the solids carbon content of the coal slime is 20%~35%.
5. a kind of method for producing high titanium products and sponge iron with titanium-containing iron ore stone and coal slime according to claim 4, special
Sign is that the titanium-containing iron ore stone and the coal slime mass ratio are 1:(0.31~0.38).
6. a kind of method for producing high titanium products and sponge iron with titanium-containing iron ore stone and coal slime according to claim 2, special
Sign is, in the step (1) raw material agglomeration, the binder is bentonite.
7. a kind of method for producing high titanium products and sponge iron with titanium-containing iron ore stone and coal slime according to claim 6, special
Sign is that the titanium-containing iron ore stone and the bentonite mass ratio are 1:(0.04~0.07).
8. a kind of method for producing high titanium products and sponge iron with titanium-containing iron ore stone and coal slime according to claim 2, special
Sign is, the additive is sodium carbonate and calcium carbonate with mass ratio 1:(3~7) mixture of mixing.
9. a kind of method for producing high titanium products and sponge iron with titanium-containing iron ore stone and coal slime according to claim 8, special
Sign is that the titanium-containing iron ore stone and the additive mass ratio are 1:(0.06~0.12).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110564969A (en) * | 2019-10-14 | 2019-12-13 | 中钢集团马鞍山矿山研究院有限公司 | Method for comprehensively recovering lead, zinc and iron in blast furnace gas ash |
| CN111172383A (en) * | 2020-02-19 | 2020-05-19 | 武翠莲 | Method for producing aluminum-silicon-iron-titanium alloy by comprehensively utilizing coal slime and industrial wastes |
-
2018
- 2018-11-20 CN CN201811384494.2A patent/CN109825698A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110564969A (en) * | 2019-10-14 | 2019-12-13 | 中钢集团马鞍山矿山研究院有限公司 | Method for comprehensively recovering lead, zinc and iron in blast furnace gas ash |
| CN110564969B (en) * | 2019-10-14 | 2021-05-25 | 中钢集团马鞍山矿山研究总院股份有限公司 | Method for comprehensively recovering lead, zinc and iron in blast furnace gas ash |
| CN111172383A (en) * | 2020-02-19 | 2020-05-19 | 武翠莲 | Method for producing aluminum-silicon-iron-titanium alloy by comprehensively utilizing coal slime and industrial wastes |
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Application publication date: 20190531 |