CN100469905C - Method forpreparing iron concentrate for making iron from phosphorus-containing oolitic hematite - Google Patents
Method forpreparing iron concentrate for making iron from phosphorus-containing oolitic hematite Download PDFInfo
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- CN100469905C CN100469905C CNB2007100348382A CN200710034838A CN100469905C CN 100469905 C CN100469905 C CN 100469905C CN B2007100348382 A CNB2007100348382 A CN B2007100348382A CN 200710034838 A CN200710034838 A CN 200710034838A CN 100469905 C CN100469905 C CN 100469905C
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Abstract
The invention discloses a method of producing iron ore concentrate containing roe - like phosphorus hematite for iron manufacture, comprising crashing the roe - like ore, wet grinding until the hematite of granularity < 0.074mm are 40-60 mass% of whole hematite, adjusting the pulp mass percent concentration to 20%-30%, adding the water glass as dispersant of 0.5-1.0kg/t, agitating adequately, selecting by helix shoot, grinding produced ore concentrate until the one with the granularity < 0.074mm are more than 80 mass%, having the water glass as dispersant of 0.2-0.5kg/t, agitating to disperse uniformly, then selecting by shaking table, washing produced iron ore concentrate in room temperature by 0.5%-1.5% dilute sulfuric acid solution for 5-15 minutes, centrifugal separation, in which the solid are iron ore concentrate. The invention treats the roe - like phosphorus hematite to obtain the iron ore concentrate with a tenor of 62%, P content less than 0.06%. The invention can fully and reasonably apply rich roe - like phosphorus hematite resource in our country, has a good effect of dephosphorization and a low cost. And produced iron ore concentrate have a high recovery ratio.
Description
Technical field
The present invention relates to a kind ofly prepare ironmaking with the method for iron ore concentrate, particularly relate to the method that a kind of phosphorous higher oolitic hematite prepare ironmaking usefulness iron ore concentrate by oolitic hematite.
Background technology
China's oolitic hematite ore reserves is abundant, but because that rhombohedral iron ore and embeddings such as quartzy, kaolinite and collophanite connect relation is complicated, one of iron ore type of putative the most difficult choosing, simultaneously, this ore deposit belongs to high-phosphorus iron ore, can not obtain to be directly used in the qualified iron ore concentrate that blast furnace ironmaking is used after the sorting.Therefore, the oolitic hematite resource does not obtain utilizing substantially at present.
In recent years, high speed development along with China's Iron And Steel Industry, ferrolite supply day is becoming tight, utilize domestic phosphorous oolitic hematite resource preparation ironmaking with on the referred schedule of research of iron ore concentrate, from the research situation of having carried out, up to the present, utilize the ironmaking fully made of stones of phosphorous oolitic hematite to mainly contain: reverse floatation process with the research work of iron ore concentrate, selectivity is gathered group-reverse flotation, high-gradient magnetic separation, ultra-fine mill-selective flocculation (poly-group)-low intensity magnetic separation or flotation, fine grinding-gravity treatment-magnetic separation, fine grinding-multiple gravity treatment, direct-reduction process, acidleach, chloridizing roasting-acid leaching process etc., but, because rhombohedral iron ore is with quartzy in the oolitic hematite ore, it is complicated that embedding such as kaolinite and collophanite connects relation, make these methods exist gained iron ore concentrate iron grade mostly and the rate of recovery low, phosphorous height, technical process is long, problems such as cost height, though have the scholar to adopt thiobacillus that the gained iron ore concentrate has been carried out dephosphorization research, dephosphorization rate only reaches about 42%.We can say, but the present oolitic hematite resource of utilizing of also not exploring large-scale industrial application prepares the effective ways of ironmaking with iron ore concentrate.
For rationally, efficiently utilize phosphorous oolitic hematite resource preparation ironmaking iron ore concentrate, and for the development and use of the abundant oolitic hematite of China's reserves provide new technical support, special proposition the present invention.
Summary of the invention
The present invention wants that the technical solution problem provides a kind of dephosphorization rate height, gained iron ore concentrate iron grade and rate of recovery height, technical process is short, cost is low prepares the method for ironmaking with iron ore concentrate by phosphorous oolitic hematite.
In order to solve the problems of the technologies described above, the method of smelting iron for preparing by phosphorous oolitic hematite provided by the invention with iron ore concentrate, utilize two stage grinding spiral chute+separation by shaking table technology to handle oolitic hematite, the gained iron ore concentrate adopts dilute sulphuric acid to leach dephosphorization again, can obtain to satisfy the qualified iron ore concentrate of blast-furnace smelting requirement, specific embodiment is, earlier with the fragmentation of roe shape iron ore, wet-milling account for less than the rhombohedral iron ore of 0.074mm to granularity whole rhombohedral iron ore mass percent 40%～60%, adjust ore pulp mass percent concentration to 20%～30%, add water glass as dispersion agent, consumption is 0.5～1.0kg/t, fully stir, adopt spiral chute to carry out sorting, the gained concentrate through regrind granularity less than the 0.074mm grade account for more than 80% after, with water glass is dispersion agent, consumption is 0.2～0.5kg/t, after dispersed with stirring is even, adopt shaking table to carry out sorting again, the gained iron ore concentrate at normal temperatures, adopt 0.5%～1.5% dilution heat of sulfuric acid washing, it is iron ore concentrate that washing time 5～15min, solid-liquid body separate the back solid.
That adopts technique scheme prepare the method processing oolitic hematite of ironmaking with iron ore concentrate by phosphorous oolitic hematite, can obtain grade 62%, P content is the iron ore concentrate below 0.06%.
Principle of the present invention is: one, the characteristics of oolitic hematite stone are that disseminated grain size is thin, the easy argillization of ore grinding, adopt the technical process of stage grinding and stage separation, can prevent that the argillization phenomenon appears in oolitic hematite stone in the grinding process, effectively improve the grade and the rate of recovery of iron ore concentrate; Two, add dispersion agent in the assorting room, help disperseing sludge, improved separating effect; Three, the phosphorus in the oolitic hematite stone mainly exists with the collophanite form, and by the ore grinding sorting process, the collophanite structure in the gained iron ore concentrate is suffered, adopts the dilution heat of sulfuric acid washing effectively to be removed.
Advantage of the present invention mainly is: one, in the technical process of stage grinding and stage separation, gravity separation technology is adopted in sorting, and technology is simply ripe, and cost is low; Two, iron ore concentrate is carried out dephosphorization treatment, treatment capacity is little, and dephosphorization effect is good, and the dilution heat of sulfuric acid of employing 0.5%～1.5% washs dephosphorization under normal temperature condition, and the washing soln sulfuric acid concentration is low, and extraction temperature is a normal temperature, and extraction time is short, and cost is low, pollutes few; Three, be applicable to all oolitic hematites.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Accompanying drawing is a process flow diagram of the present invention.
Embodiment
Embodiment 1, referring to accompanying drawing, TFe is 35.27%, P is " Ningxiang's formula " oolitic hematite of 0.82%, wet-milling account for less than the rhombohedral iron ore of 0.074mm to granularity whole rhombohedral iron ore mass percent about 40%, adjust pulp density to 20%, the water glass that is added in an amount of 0.5kg/t is done the dispersion agent stirring, ore pulp is fully disperseed, adopt the spiral chute sorting, concentrate regrinding of gained to granularity accounts for about 80% less than 0.074mm, the water glass that is added in an amount of 0.2kg/t is made dispersion agent, adopt separation by shaking table, the gained iron ore concentrate adopts 0.5% sulfuric acid leaching 5min dephosphorization, and can obtain the iron grade is 62.21%, the rate of recovery is 52.30%, and P content is 0.058% iron ore concentrate.
Embodiment 2, referring to accompanying drawing, TFe is 35.27%, P is 0.82% oolitic hematite, wet-milling account for less than the rhombohedral iron ore of 0.074mm to granularity whole rhombohedral iron ore mass percent about 50%, adjust pulp density to 25%, the water glass that is added in an amount of 0.7kg/t is done the dispersion agent stirring, ore pulp is fully disperseed, adopt the spiral chute sorting, concentrate regrinding of gained to granularity accounts for about 80% less than 0.074mm, the water glass that is added in an amount of 0.3kg/t is made dispersion agent, adopt separation by shaking table, the gained iron ore concentrate adopts 1.0% sulfuric acid leaching 10min dephosphorization, and can obtain the iron grade is 63.12%, the rate of recovery is 51.50%, and P content is 0.055% iron ore concentrate.
Embodiment 3, referring to accompanying drawing, TFe is 37.51%, P is 0.88% oolitic hematite, wet-milling account for less than the rhombohedral iron ore of 0.074mm to granularity whole rhombohedral iron ore mass percent about 60%, adjust pulp density to 30%, the water glass that is added in an amount of 1kg/t is done the dispersion agent stirring, ore pulp is fully disperseed, adopt the spiral chute sorting, concentrate regrinding of gained to granularity accounts for about 80% less than 0.074mm, the water glass that is added in an amount of 0.5kg/t is made dispersion agent, adopt separation by shaking table, the gained iron ore concentrate adopts 1% sulfuric acid leaching 10min dephosphorization, and can obtain the iron grade is 63.35%, the rate of recovery is 50.89%, and P content is 0.050% iron ore concentrate.
Claims (1)
1 one kinds of methods that prepare ironmaking usefulness iron ore concentrate by phosphorous oolitic hematite, it is characterized in that: earlier with the fragmentation of roe shape iron ore, wet-milling account for less than the rhombohedral iron ore of 0.074mm to granularity whole rhombohedral iron ore mass percent 40%～60%, adjust ore pulp mass percent concentration to 20%～30%, add water glass as dispersion agent, consumption is 0.5～1.0kg/t, fully stir, adopt spiral chute to carry out sorting, the gained concentrate through regrind granularity less than the 0.074mm grade account for more than 80% after, with water glass is dispersion agent, consumption is 0.2～0.5kg/t, after dispersed with stirring is even, adopts shaking table to carry out sorting again, the gained iron ore concentrate at normal temperatures, adopt 0.5%～1.5% dilution heat of sulfuric acid washing, it is iron ore concentrate that washing time 5～15min, solid-liquid body separate the back solid.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100348382A CN100469905C (en) | 2007-04-28 | 2007-04-28 | Method forpreparing iron concentrate for making iron from phosphorus-containing oolitic hematite |
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| CNB2007100348382A CN100469905C (en) | 2007-04-28 | 2007-04-28 | Method forpreparing iron concentrate for making iron from phosphorus-containing oolitic hematite |
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| CN100469905C true CN100469905C (en) | 2009-03-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824532A (en) * | 2010-04-02 | 2010-09-08 | 南昌大学 | Dephosphorizing method for phosphorus iron ore |
| CN102168174B (en) * | 2011-04-07 | 2012-10-10 | 中国地质大学（武汉） | Method for dephosphorizing high-phosphorus hematite |
| CN102220481B (en) * | 2011-05-26 | 2012-05-30 | 山东乾舜矿冶科技股份有限公司 | Process for extracting iron from high-silicon aluminum haematite |
| CN102345010A (en) * | 2011-09-26 | 2012-02-08 | 武汉科技大学 | Method for producing iron ore concentrate by mechanical and chemical activation pretreatment |
| CN102716801B (en) * | 2012-06-27 | 2014-03-26 | 宜昌市正济文化传播有限公司 | Dressing method for high-phosphor-content oolitic hematite |
| CN105583069B (en) * | 2015-12-21 | 2018-02-23 | 中南大学 | A kind of dressing method of high-phosphor oolitic hematite |
| CN110743694B (en) * | 2019-09-25 | 2021-08-17 | 武汉科技大学 | Pretreatment method for oolitic hematite grinding aid |
| CN113862470B (en) * | 2021-09-28 | 2023-06-09 | 兰溪市博远金属有限公司 | Adhesive for dry pelletizing of fine-fraction aluminum ash and pelletizing method of fine-fraction aluminum ash |
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Non-Patent Citations (2)
| Title |
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| 鲕状赤铁矿提铁降磷工艺研究. 文，勤.中国优秀博硕士学位论文全文数据库(硕士)，第04期. 2007 |
| 鲕状赤铁矿提铁降磷工艺研究. 文，勤.中国优秀博硕士学位论文全文数据库(硕士)，第04期. 2007 * |
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