CN103657841A - Production method of vanadium-titanium-ferrum concentrate - Google Patents
Production method of vanadium-titanium-ferrum concentrate Download PDFInfo
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Abstract
The invention provides a production method of vanadium-titanium-ferrum concentrate. The production method comprises following steps: feeding raw ore into a primary grinding and grading closed path for ore grinding, and subjecting primary graded overflow for primary coarse magnetic separation; subjecting concentrate processed via primary coarse magnetic separation for secondary grading, subjecting secondary grading sand return for secondary grinding, subjecting ore discharge of secondary grinding back for secondary grading, and subjecting secondary graded overflow for secondary coarse magnetic separation; subjecting concentrate processed via secondary coarse magnetic separation for third grading, subjecting third grading sand return for third grinding, subjecting ore discharge of third grinding back for third grading, and subjecting third graded overflow for third coarse magnetic separation, subjecting concentrate processed via third coarse magnetic separation for third refined magnetic separation so as to obtain concentrate processed via third refined magnetic separation; mixing mine tailings of third coarse magnetic separation and third refined magnetic separation, subjecting an obtained mixture for weak magnetic scavenging, and subjecting concentrate processed via weak magnetic scavenging for third grading. Wherein, product fineness of primary grinding, secondary grinding and third grinding is controlled at about -200 meshes; contents of primary grinding, secondary grinding and third grinding reach to 28 to 39%, 55 to 64%, and 80 to 90% respectively; and the mine tailings of primary grinding, secondary grinding, and weak magnetic scavenging are the final mine tailings.
Description
Technical field
The invention belongs to sefstromite stone and sort technical field, specifically, relate to a kind of production technology of sefstromite concentrate.
Background technology
China's v-ti magnetite mineral deposit is widely distributed, reserves are abundant, reserves and yield occupy the 3rd of national iron ore, proved reserves are 98.3 hundred million tons, prospective reserves reaches more than 30,000,000,000 tons, is mainly distributed in that Panzhihua Region, work area, Chengde, Hanzhong Area of Shaanxi, Yun county, Hubei sun, Xiangyang are regional, the area such as Xingning of Guangdong Province and Shanxi Dai County.Wherein, Panzhihua Region is the Main Metallogenic band of China's vanadium titano-magnetite, is also one of the important producing region in similar mineral deposit in the world.Because the ore properties of vanadium titano-magnetite is special, wherein iron and titanium are solid solution embedding cloth, cause by physical upgrading method and reclaim the type sefstromite concentrate, do not reach the grade index that common magnetic iron ore reclaims iron ore concentrate.
For a long time the smelting of sefstromite concentrate mainly being matched to the common magnetic iron ore of import high-grade with sefstromite concentrate carries out.Lasting weakness along with lasting surging, the steel market of imported iron ore, has seriously restricted the fast development of vanadium titanium steel iron.Take ore dressing plant, Panzhihua Region as example, and this factory adopts mill rank, two sections of rank to select flow process to carry out the recovery of iron ore concentrate, and its sefstromite concentrate grade that smelting is provided is 54% or is slightly larger than 54%.
Therefore,, in order to adapt to the demand for development of market and production, need a kind of method that can further improve sefstromite concentrate grade badly.
Summary of the invention
The object of the invention is to solve at least one in prior art above shortcomings.
For example, one of object of the present invention is to provide a kind of method that is suitable for vanadium titano-magnetite, can improves sefstromite concentrate grade.
Another object of the present invention is to provide a kind of sefstromite concentrate production technology that can improve sefstromite concentrate grade, can guarantee to select again factory's production capacity.
The invention provides a kind of production technology of sefstromite concentrate.Described production technology comprises the following steps: the v-ti magnetite raw ore after fragmentation is fed to the Grinding procedure of primary grinding classification in closed circuit, one section of Grading Overflow feeds one section of thick magnetic separation operation, the mine tailing of one section of thick magnetic separation operation is true tailings, wherein, primary grinding is controlled at mog-200 order content and reaches 28～39%, the concentrate of one section of thick magnetic separation operation feeds two sections of classifications after de-magnetic, two sections of classification sand returns feed secondary grinding operation, the ore discharge of secondary grinding operation returns to two sections of classifications, two sections of Grading Overflows feed two sections of thick magnetic separation operations, the mine tailing of two sections of thick magnetic separation operations is true tailings, wherein, secondary grinding operation is controlled at mog-200 order content and reaches 55～64%, the concentrate of two sections of thick magnetic separation operations feeds three sections of classifications after de-magnetic, three sections of classification sand returns feed three sections of Grinding procedures, the ore discharge of three sections of Grinding procedures returns to three sections of classifications, three sections of Grading Overflows feed three sections of thick magnetic separation operations, the concentrate of three sections of thick magnetic separation operations feeds three sections of smart magnetic separation operations, the concentrate of three sections of smart magnetic separation operations is final iron ore concentrate, the mine tailing of three sections of smart magnetic separation operations mixes with the mine tailing of three sections of thick magnetic separation operations and feeds weak magnetic and scan operation, the concentrate that weak magnetic is scanned operation returns to three sections of classifications, the mine tailing that weak magnetic is scanned operation is true tailings, wherein, three sections of Grinding procedures are controlled at mog-200 order content and reach 80～90%.
Compared with prior art, beneficial effect of the present invention comprises: a kind of ore-dressing technique that is applicable to reclaim sefstromite concentrate from vanadium titano-magnetite can be provided; Can, in the situation that guaranteeing that ore dressing production capacity is substantially constant, improve sefstromite concentrate grade; And can suitably alleviate the pressure of subsequent job energy-saving and emission-reduction.
Accompanying drawing explanation
Fig. 1 shows the sefstromite concentrate production technology of exemplary embodiment of the present.
The specific embodiment
Hereinafter, in connection with exemplary embodiment, describe sefstromite concentrate production technology of the present invention in detail.
Generally, want to improve sefstromite concentrate grade, must strengthen the liberation degree of minerals of sefstromite concentrate, and the main method of raising liberation degree of minerals be take fine grinding as main.Yet, inventor is by experimental study for many years, find sefstromite concentrate after fine grinding to sort can bring many unfavorable, be mainly reflected in following some: 1. because sefstromite concentrate coercivity is larger, after ore grain size attenuates, Action of Gravity Field reduces, and magnetic coagulation phenomenon will be more and more serious, be mingled with phenomenon obvious, very unfavorable to improving iron concentrate grade; 2. by adopting new equipment column magnetic separator to carry out beneficiation test, although this equipment has certain help to the sefstromite concentrate grade and the rate of recovery that reclaim after fine grinding, because this device processes amount is little, water consumption is large, equipment performance is unstable, at present cannot scale of input industrial production; 3. the sefstromite concentrate that selects flow process to obtain for mill rank, two sections of rank of aforementioned employing, as carry out regrinding and reconcentration, although can reach the object that improves sefstromite concentrate grade, certainly will cause the significantly reduction of ore-dressing technique production capacity.For in the situation that not reducing ore-dressing technique production capacity, improve the grade of sefstromite concentrate, inventor provides the production technology of sefstromite concentrate of the present invention.
Sefstromite concentrate production technology of the present invention comprises the following steps: the v-ti magnetite raw ore (referred to as raw ore) after fragmentation is fed to the Grinding procedure of primary grinding classification in closed circuit, one section of Grading Overflow feeds one section of thick magnetic separation operation, the mine tailing of one section of thick magnetic separation operation is true tailings, wherein, primary grinding is controlled at mog-200 order content and reaches 28～39%, that is to say, primary grinding is that in the mineral grain that makes to obtain, granularity accounts for 28～39% of gross weight at-200 object particles by its ore grinding target control, the concentrate of one section of thick magnetic separation operation feeds two sections of classifications after de-magnetic, two sections of classification sand returns feed secondary grinding operation, the ore discharge of secondary grinding operation returns to two sections of classifications, two sections of Grading Overflows feed two sections of thick magnetic separation operations, the mine tailing of two sections of thick magnetic separation operations is true tailings, wherein, secondary grinding operation is controlled at mog-200 order content and reaches 55～64%, that is to say, secondary grinding is that in the mineral grain that makes to obtain, granularity accounts for 55～64% of gross weight at-200 object particles by its ore grinding target control, the concentrate of two sections of thick magnetic separation operations feeds three sections of classifications after de-magnetic, three sections of classification sand returns feed three sections of Grinding procedures, the ore discharge of three sections of Grinding procedures returns to three sections of classifications, three sections of Grading Overflows feed three sections of thick magnetic separation operations, the concentrate of three sections of thick magnetic separation operations feeds three sections of smart magnetic separation operations, the concentrate of three sections of smart magnetic separation operations is final iron ore concentrate, the mine tailing of three sections of smart magnetic separation operations mixes with the mine tailing of three sections of thick magnetic separation operations and feeds weak magnetic and scan operation, the concentrate that weak magnetic is scanned operation returns to three sections of classifications, the mine tailing that weak magnetic is scanned operation is true tailings, wherein, three sections of Grinding procedures are controlled at mog-200 order content and reach 80～90%, that is to say, three sections of ore grindings are that in the mineral grain that makes to obtain, granularity accounts for 80～90% of gross weight at-200 object particles by its ore grinding target control.
With regard to sefstromite concentrate production technology of the present invention, the ore milling product fineness of one section ore grinding and secondary grinding operation reduces, and can increase its disposal ability like this, thereby improve the production capacity of primary grinding and secondary grinding operation; Meanwhile, by three sections of classifications associated with each other, three sections of Grinding procedures, three sections of thick magnetic separation operation, weak magnetic are set, the operation such as scan, can improve the grade of sefstromite concentrate; Generally speaking, the acting in conjunction of scanning operation by three sections of classifications of primary grinding and secondary grinding operation and follow-up setting, three sections of Grinding procedures, three sections of thick magnetic separation operations, weak magnetic, can realize the object that improves the grade of sefstromite concentrate in the situation that not reducing production capacity.
In one exemplary embodiment of the present invention, the production technology of sefstromite concentrate on the basis of the above, also the magnetic field intensity of one section of thick magnetic separation operation can be controlled is 2500～3000 oersteds, it is 1500～2000 oersteds that the magnetic field intensity of two, three sections of thick magnetic separation operations is controlled, it is 1000～1500 oersteds that the magnetic field intensity of three sections of smart magnetic separation operations is controlled, and the magnetic field intensity control of weak magnetic being scanned to operation is 2500～4000 oersteds.Can obtain so better magnetic separation effect.Yet, the invention is not restricted to this, also can adopt other suitable magnetic field intensity.
In another exemplary embodiment of the present invention, preferably, primary grinding is controlled at mog-200 order content and reaches 32～37%.Preferably, secondary grinding operation is controlled at mog-200 order content and reaches 57～62%.Preferably, three sections of Grinding procedures are controlled at mog-200 order content and reach 82～88%.
In addition,, in another exemplary embodiment of the present invention, the production technology of sefstromite concentrate also can comprise carries out concentrate filtration to three sections of resulting concentrate of smart magnetic separation operation
Describe with reference to the accompanying drawings the concrete example of the present invention in detail.
Fig. 1 shows the sefstromite concentrate production technology of exemplary embodiment of the present.
As shown in Figure 1, in a concrete example of the present invention, raw ore after fragmentation (is for example fed to the ball milling operation of primary grinding classification in closed circuit, one section of ball mill), one section of Grading Overflow feeds one section of thick magnetic separation operation (one section of thick magnetic separator), the mine tailing of one section of thick magnetic separation operation is true tailings, and wherein, primary grinding is controlled at mog-200 order content and reaches 28～39%, the concentrate of one section of thick magnetic separation operation feeds two sections of classifications after de-magnetic (not shown), two sections of classification sand returns (for example feed two sections of ball milling operations, two sections of ball mills), the ore discharge of two sections of ball milling operations returns to two sections of classifications, two sections of Grading Overflows feed two sections of thick magnetic separation operations (two sections of thick magnetic separation meters), the mine tailing of two sections of thick magnetic separation operations is true tailings, and two sections of ball milling operations are controlled at mog-200 order content and reach 55～64%, the concentrate of two sections of thick magnetic separation operations feeds three sections of classifications after de-magnetic (not shown), three sections of classification sand returns (for example feed three sections of ball milling operations, three sections of ball mills), the ore discharge of three sections of ball milling operations returns to three sections of classifications, three sections of Grading Overflows feed three sections of thick magnetic separation operations, the concentrate of three sections of thick magnetic separation operations (for example feeds three sections of smart magnetic separation operations, three sections of smart magnetic separation meters), the concentrate of three sections of smart magnetic separation operations is final iron ore concentrate, the mine tailing of three sections of smart magnetic separation operations mixes with the mine tailing of three sections of thick magnetic separation operations and feeds weak magnetic and (for example scan operation, weak magnetic scavenger), the concentrate that weak magnetic is scanned operation returns to three sections of classifications, the mine tailing that weak magnetic is scanned operation is true tailings, wherein, three sections of ball milling operations are controlled at mog-200 order content and reach 80～90%.
Sefstromite concentrate is produced in the technological process of example 1 to 3 employing Fig. 1.Composition as the v-ti magnetite raw ore of raw material is as shown in table 4 by weight.The related process parameter of example 1 to 3 is as shown in table 1.
The relevant parameter of table 1 example 1 to 3
Table 2 shows productive rate, grade, the rate of recovery and the sulfur content situation of example 1 to 3 resulting sefstromite concentrate product.
Productive rate, grade and the rate of recovery of table 2 example 1 to 3
| Example | Productive rate/% | TFe grade/% | The TFe rate of recovery/% | Sulfur content/% |
| Example 1 | 35.15 | 55.96 | 66.59 | 0.468% |
| Example 2 | 35.43 | 55.60 | 66.69 | 0.479% |
| Example 3 | 35.01 | 56.01 | 66.38 | 0.462% |
Table 3 show adopt traditional mill rank, two sections of rank select technique process with example 1 to 3 in productive rate, grade, the rate of recovery and the sulfur content situation of the resulting sefstromite concentrate product of the identical vanadium titano-magnetite of raw ore that uses.
Productive rate, grade and the rate of recovery of table 3 example 1 to 3
| Example | Productive rate/% | TFe grade/% | The TFe rate of recovery/% | Sulfur content/% |
| Comparative example | 35.63 | 54.01 | 66.35 | 0.6% |
Table 4 raw ore chemistry multielement analysis result
| Element | TFe | FeO | mFe | S | Fe 2O 3 | TiO 2 | V 2O 5 |
| Content (%) | 29.53 | 21.36 | 20.20 | 0.631 | 17.70 | 10.54 | 0.278 |
| Element | SiO 2 | Al 2O 3 | CaO | MgO | Co | P | As |
| Content (%) | 22.80 | 7.65 | 6.36 | 7.23 | 0.02 | 0.015 | <0.01 |
Contrast table 2 and table 3, can find out, for technique is selected on traditional mill rank, two sections of rank, adopts technique of the present invention to process vanadium titano-magnetite production sefstromite concentrate and have good technical-economic index.For example, productive rate of the present invention can reach 35～35.43%, and itself and traditional mill rank, two sections of rank select the productive rate of technique suitable; TFe grade of the present invention can reach 55.60～56.00%, and it selects technique to improve nearly 2% compared with traditional mill rank, two sections of rank; The rate of recovery of the present invention has small size raising, can reach 66.38～66.69%.That is to say, sefstromite concentrate production technology of the present invention can, in the situation that guaranteeing that production capacity is substantially constant, improve sefstromite concentrate grade.In addition, the sulfur content of the sefstromite concentrate of gained of the present invention can be low to moderate 0.462%, and it selects technique to reduce more than 0.1% compared with traditional mill rank, two sections of rank, has alleviated the pressure of subsequent job energy-saving and emission-reduction.
In sum, sefstromite concentrate production technology of the present invention is applicable to reclaim sefstromite concentrate from vanadium titano-magnetite, and it can, in the situation that guaranteeing that production capacity is substantially constant, improve sefstromite concentrate grade; And can suitably alleviate the pressure of subsequent job energy-saving and emission-reduction.
In addition, adopt sefstromite concentrate production new technique of the present invention, although select factory's production cost to increase to some extent, can significantly reduce subsequent smelting operating cost.According to recent sefstromite concentrate, smelt and produce statistics, the grade of sefstromite concentrate does not improve one percentage point, the returning charge amount of sintering system can reduce 100,000 tons/year, estimate that a year benefit can reach 9,000,000 yuan, 300,000 tons/year of the import volumes of high grade iron concentrate can be reduced, according to the price difference in 800 yuan, ore deposit per ton, 1.4 hundred million yuan of sintering costs can be saved.Meanwhile, improved sefstromite concentrate grade, be conducive to reduce the pressure that stack slag field, environmental benefit is huge.
Although described the present invention with exemplary embodiment by reference to the accompanying drawings above, those of ordinary skills should be clear, in the situation that do not depart from the spirit and scope of claim, can carry out various modifications to above-described embodiment.
Claims (5)
1. a production technology for sefstromite concentrate, is characterized in that, described production technology comprises the following steps:
V-ti magnetite raw ore after fragmentation is fed to the Grinding procedure of primary grinding classification in closed circuit, one section of Grading Overflow feeds one section of thick magnetic separation operation, the mine tailing of one section of thick magnetic separation operation is true tailings, and wherein, primary grinding is controlled at mog-200 order content and reaches 28～39%;
The concentrate of one section of thick magnetic separation operation feeds two sections of classifications after de-magnetic, two sections of classification sand returns feed secondary grinding operation, the ore discharge of secondary grinding operation returns to two sections of classifications, two sections of Grading Overflows feed two sections of thick magnetic separation operations, the mine tailing of two sections of thick magnetic separation operations is true tailings, wherein, secondary grinding operation is controlled at mog-200 order content and reaches 55～64%;
The concentrate of two sections of thick magnetic separation operations feeds three sections of classifications after de-magnetic, three sections of classification sand returns feed three sections of Grinding procedures, the ore discharge of three sections of Grinding procedures returns to three sections of classifications, three sections of Grading Overflows feed three sections of thick magnetic separation operations, the concentrate of three sections of thick magnetic separation operations feeds three sections of smart magnetic separation operations, the concentrate of three sections of smart magnetic separation operations is final iron ore concentrate, the mine tailing of three sections of smart magnetic separation operations mixes with the mine tailing of three sections of thick magnetic separation operations and feeds weak magnetic and scan operation, the concentrate that weak magnetic is scanned operation returns to three sections of classifications, the mine tailing that weak magnetic is scanned operation is true tailings, wherein, three sections of Grinding procedures are controlled at mog-200 order content and reach 80～90%.
2. the production technology of sefstromite concentrate according to claim 1, it is characterized in that, the magnetic field intensity of described one section of thick magnetic separation operation is 2500～3000 oersteds, two, the magnetic field intensity of three sections of thick magnetic separation operations is 1500～2000 oersteds, the magnetic field intensity of three sections of smart magnetic separation operations is 1000～1500 oersteds, and the magnetic field intensity that weak magnetic is scanned operation is 2500～4000 oersteds.
3. the production technology of sefstromite concentrate according to claim 1, is characterized in that, described primary grinding is controlled at mog-200 order content and reaches 32～37%.
4. the production technology of sefstromite concentrate according to claim 1, is characterized in that, described secondary grinding operation is controlled at mog-200 order content and reaches 57～62%.
5. the production technology of sefstromite concentrate according to claim 1, is characterized in that, described three sections of Grinding procedures are controlled at mog-200 order content and reach 82～88%.
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| CN104722396A (en) * | 2015-03-19 | 2015-06-24 | 马钢集团矿业有限公司 | Comprehensive utilization method of magnetite-containing country rock |
| CN104741218A (en) * | 2015-04-01 | 2015-07-01 | 东北大学 | Mineral separation method capable of increasing vanadium recovery rate of ultralow-grade vanadium-titanium magnetite |
| CN104785367A (en) * | 2015-04-03 | 2015-07-22 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Mineral separation method for pre-extraction of concentrates from roasted iron ore |
| CN105107616A (en) * | 2015-09-22 | 2015-12-02 | 赣州金环磁选设备有限公司 | Low-cost high-recovery environment-friendly mineral separation method of low-grade vanadium titano-magnetite |
| CN105195306A (en) * | 2015-11-05 | 2015-12-30 | 攀钢集团矿业有限公司 | Separation method of low-grade magnetic minerals |
| CN107309080A (en) * | 2017-06-08 | 2017-11-03 | 陕西冶金设计研究院有限公司 | A kind of super low-grade primary magnetic iron ore comprehensive development and utilization method |
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| CN104722396A (en) * | 2015-03-19 | 2015-06-24 | 马钢集团矿业有限公司 | Comprehensive utilization method of magnetite-containing country rock |
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| CN104741218A (en) * | 2015-04-01 | 2015-07-01 | 东北大学 | Mineral separation method capable of increasing vanadium recovery rate of ultralow-grade vanadium-titanium magnetite |
| CN104785367A (en) * | 2015-04-03 | 2015-07-22 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Mineral separation method for pre-extraction of concentrates from roasted iron ore |
| CN105107616A (en) * | 2015-09-22 | 2015-12-02 | 赣州金环磁选设备有限公司 | Low-cost high-recovery environment-friendly mineral separation method of low-grade vanadium titano-magnetite |
| CN105195306A (en) * | 2015-11-05 | 2015-12-30 | 攀钢集团矿业有限公司 | Separation method of low-grade magnetic minerals |
| CN107309080A (en) * | 2017-06-08 | 2017-11-03 | 陕西冶金设计研究院有限公司 | A kind of super low-grade primary magnetic iron ore comprehensive development and utilization method |
| CN107377206A (en) * | 2017-07-11 | 2017-11-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of closed circuit recycling technique of rotary kiln baking magnetic separation iron ore stone mine tailing |
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| CN107377204A (en) * | 2017-07-11 | 2017-11-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of refractory iron ore closed circuit shaft roasting dry grinding dry separation craft online |
| CN107377207A (en) * | 2017-07-11 | 2017-11-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of refractory iron ore closed circuit rotary kiln baking dry grinding dry separation craft online |
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