CN102921541B - Process for recovering flotation tailings of magnetite by adopting strong magnetic-anionic reverse flotation of hematite - Google Patents
Process for recovering flotation tailings of magnetite by adopting strong magnetic-anionic reverse flotation of hematite Download PDFInfo
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- CN102921541B CN102921541B CN201210461739.3A CN201210461739A CN102921541B CN 102921541 B CN102921541 B CN 102921541B CN 201210461739 A CN201210461739 A CN 201210461739A CN 102921541 B CN102921541 B CN 102921541B
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Abstract
The invention relates to a process for recovering flotation tailings of magnetite by adopting strong magnetic-anionic reverse flotation of hematite. The process is characterized in that the process comprises the following steps: a flow guide pipeline is obliquely arranged between a disc type magnetic separator of a cationic reverse flotation process flow of the magnetite and a strong magnetic-anionic reverse flotation flow, wherein one end of the flow guide pipeline is connected with a bottom opening in the rear end of a chute of the disc type magnetic separator in the cationic reverse flotation process flow of the magnetite, and the other end of the flow guide pipeline is communicated with a central disc of a strong magnetic front concentrator in the strong magnetic-anionic reverse flotation flow. The process has the advantages that when the flotation tailings in the magnetite flotation process flow enters the strong magnetic-anionic reverse flotation process of the hematite to be mixed with original ore pulp and then concentrated, a system is not influenced, the production is conducted steadily and smoothly, abnormal fluctuation is avoided, the grade of the separated synthetic tailings is 8 to 10 percent, the grade of strong magnetic concentrate is 45 to 50 percent, and the grade of final flotation concentrate is above 68 percent. Through the adoption of the process, the flotation tailings in the magnetite flotation process flow can be reduced from originally 15 percent to 10 percent, so as to reduce metal losses.
Description
Technical field
The present invention relates to technique of preparing field, the strong magnetic of especially a kind of employing bloodstone-anion reverse floatation reclaims magnetic iron ore flotation tailing technique.
Background technology
At present in flotation technology field for the treatment of iron ore, mainly more with magnetic iron ore and two kinds of mineral types of bloodstone.Wherein in processing bloodstone technique, often adopt anion reverse floatation.In flotation, process in bloodstone process and conventionally adopt and strong magnetic process integration, can obtain higher concentrate grade, and have good result to improving metal recovery rate.
But in processing magnetic iron ore flotation process, ore pulp is after cation reverse flotation and magnetic separation sort, and flotation tailing is that disk-type magnetic separator mine tailing is high to 15% left and right.In former technological process, flotation tailing is directly entered to mine tailing thickener, because mine tailing thickener equally also belongs to all mine tailings in magnetic separation process, collect place, so flotation tailing is higher will directly affect comprehensive tailings grade.Especially when flotation feed preparation unit size is thicker, cause flotation effect not good, will cause flotation tailing higher, even up to more than 20%, seriously cause amount of metal to run off.
Its magnetic iron ore cation reverse flotation technological process: magnetic separation process produces concentrate product and deliver to flotation operation district after 24m is concentrated, ore pulp feeds successively through roughly selecting flotation device, the concentrate of roughly selecting flotation device feeds precision sorting flotation machine operation, the concentrate product of precision sorting flotation machine is final products, and its grade is 68-71%, roughly select the foam that flotation device scrapes and deliver to a stages of magnetic separation, the mine tailing that one stages of magnetic separation sorts feeds to be scanned, the concentrate of one stages of magnetic separation and scavenger concentrate merging feed ball mill, scan mine tailing and throw tail, ball mill ore discharging is delivered to drench pit, the concentrate that dehydration is thrown after tail feeds two stages of magnetic separation, the foam that the concentrate of two stages of magnetic separation and precision sorting flotation machine scrape is delivered to and is roughly selected flotation device and select to ore deposit again, and scan, dehydration, the mine tailing gravity flow that two stages of magnetic separation produce feeds disk-type magnetic separator, the concentrate pumping one stages of magnetic separation machine of disk-type magnetic separator, mine tailing gravity flow feeds mine tailing thickener, as shown in Figure 1.
Strong magnetic anion reverse floatation technological process: be mainly that bloodstone is sorted, its technological process is: bloodstone raw ore is after cyclone classification, sand setting enters magnetic gravity separation technology, overflow feeds thickener and concentrates, concentrated underflow feeds weak magnetic separator, after sorting, produce concentrate and first through slag-removing device, remove impurity substances in ore pulp, feed again strong magnetic machine, weak magnetic tail together feeds the front thickener of flotation with the concentrate merging of strong magnetic machine, the impurity substances of slag-removing device is together thrown tail with the mine tailing of strong magnetic machine, the ore pulp underflow after concentrated that feeds the front thickener of flotation enters anion reverse floatation technological process.Flotation operation is scanned operation through roughly selecting flotation device, precision sorting flotation machine, three sections of flotation, wherein flotation sweeps concentrate and returns and roughly select flotation device, flotation two is swept concentrate and is returned to flotation and sweep to ore deposit, flotation three is swept concentrate and is returned to flotation two and sweep to ore deposit, flotation three ore deposit of winding up is true tailings, and the concentrate of precision sorting flotation machine is final concentrate.
There is no at present the report that the flotation tailing in the technological process of magnetic iron ore cation reverse flotation is fed to the technological process of strong magnetic anion reverse floatation.
Summary of the invention
The object of the invention is to provide the strong magnetic of a kind of employing bloodstone-anion reverse floatation and reclaims magnetic iron ore flotation tailing technique, the flotation tailing that this technique produces magnetic iron ore cation reverse flotation technique, by former magnetic iron ore cation reverse flotation technological process, adopt mine tailing thickener to process separately, introduce in the strong magnetic-anion reverse floatation of bloodstone technique, increase bloodstone technique concentrate output, reduce amount of metal and run off.
The object of the invention is to realize by following technical proposals:
According to the strong magnetic of employing bloodstone of the present invention-anion reverse floatation, reclaim magnetic iron ore flotation tailing technique, comprise the strong magnetic-anion reverse floatation of the technological process of magnetic iron ore cation reverse flotation and bloodstone flow process, it is characterized in that: between the disk-type magnetic separator of magnetic iron ore cation reverse flotation technological process and the strong magnetic-anion reverse floatation of bloodstone flow process, tilt to be provided with drainage pipe, one end of its drainage pipe is connected with the bottom opening of the chute end of disk-type magnetic separator in the technological process of bloodstone magnetic iron ore cation reverse flotation, the other end is connected with the front thickener spider of the strong magnetic place in strong magnetic-anion reverse floatation flow process, under concrete step process flow process
1) by granularity, be-200 orders, in the magnetic iron ore cation reverse flotation technological process of grade 20-25%, the mine tailing of disk-type magnetic separator feeds the front thickener spider of the strong magnetic place in the strong magnetic-anion reverse floatation of bloodstone flow process by drainage pipe, together with the overflow of flowing the cyclone in flow process with the strong magnetic of bloodstone-anion reverse floatation, feeding thickener concentrates
2) underflow of its thickener feeds weak magnetic separator, after sorting, produce concentrate and first through slag-removing device, remove impurity substances in ore pulp, then feed strong magnetic machine, weak magnetic tail together feeds the front thickener of flotation with the concentrate merging of strong magnetic machine, the impurity substances of slag-removing device is together thrown tail with the mine tailing of strong magnetic machine
3) the ore pulp underflow after concentrating that feeds thickener before flotation enters anion reverse floatation operation,
4) its flotation operation is scanned operation through roughly selecting flotation device, precision sorting flotation machine, three sections of flotation,
The concentrate of roughly selecting flotation device feeds precision sorting flotation machine, and the mine tailing of roughly selecting flotation device feeds that flotation sweeps, flotation two is swept sweeps with flotation three,
Wherein the concentrate of precision sorting flotation machine is final concentrate, returns together with the concentrate that the mine tailing of precision sorting flotation machine sweeps with flotation and roughly selects flotation device to ore deposit, and flotation two is swept concentrate and returned to flotation and sweep to ore deposit, and flotation three is swept concentrate and returned to flotation two and sweep to ore deposit.
The length of described drainage pipe is 50-55m, and the angle of inclination of described drainage pipe is 8 °-10 °.
Compared with prior art: advantage of the present invention is that flotation tailing in the technological process of magnetic iron ore cation reverse flotation is entered to the strong magnetic-anion reverse floatation of bloodstone technique, concentrated after mixing with the strong magnetic-anion reverse floatation of bloodstone raw ore slurry, on not impact of the strong magnetic-anion reverse floatation of bloodstone technological process, produce stable smooth operation.Simultaneously by strong magnetic tail, floating tail, floating fine work position all technical are investigated, there are not unusual fluctuations, the comprehensive tailings grade 8-10% of weak magnetic and strong magnetic after the magnetic separation of the strong magnetic-anion reverse floatation of bloodstone technique sorts, high intensity magnetic mineral is 45-50%, final flotation concentrate reaches more than 68%, adopt the present invention the flotation tailing in magnetic iron ore flotation process can be reduced to 10%, minimizing metal loss from original 15%.
Accompanying drawing explanation
Fig. 1 is former magnetic iron ore cation reverse flotation process chart.
Fig. 2 is the flow chart that cation reverse flotation mine tailing of the present invention feeds the strong magnetic-anion reverse floatation of bloodstone technique.
Fig. 3 is that drainage pipe of the present invention arranges structural representation.
The specific embodiment
Below in conjunction with embodiment, describe the specific embodiment of the present invention in detail.
As Fig. 2, shown in 3, the strong magnetic of employing bloodstone of the present invention-anion reverse floatation reclaims magnetic iron ore flotation tailing technique, comprise the strong magnetic-anion reverse floatation of the technological process of magnetic iron ore cation reverse flotation and bloodstone flow process, it is characterized in that: between the disk-type magnetic separator 1 of magnetic iron ore cation reverse flotation technological process and the strong magnetic-anion reverse floatation of bloodstone flow process, by crane span structure 3, tilt to be provided with drainage pipe 2, one end of its drainage pipe is connected with the bottom opening of the chute end of disk-type magnetic separator 1 in the technological process of magnetic iron ore cation reverse flotation, the other end is connected with the front thickener spider of strong magnetic 4 places in strong magnetic-anion reverse floatation flow process,
The present invention can become 50-55m by the Design of length of described drainage pipe according to on-site actual situations, and the angle of inclination of described drainage pipe is designed to 8-10 °,
Under concrete step process flow process:
1) by granularity, be-200 orders, in the magnetic iron ore cation reverse flotation technological process of grade 20-25%, the mine tailing of disk-type magnetic separator feeds the front thickener spider of the strong magnetic place in the strong magnetic-anion reverse floatation of bloodstone flow process by drainage pipe, together with the overflow of flowing the cyclone in flow process with the strong magnetic of bloodstone-anion reverse floatation, through the front thickener of strong magnetic, concentrate
2) before its strong magnetic, the underflow of thickener feeds anion reverse floatation operation,
1) by granularity, be-200 orders, in the magnetic iron ore cation reverse flotation technological process of grade 20-25%, the mine tailing of disk-type magnetic separator feeds the front thickener spider of the strong magnetic place in the strong magnetic-anion reverse floatation of bloodstone flow process by drainage pipe, together with the overflow of flowing the cyclone in flow process with the strong magnetic of bloodstone-anion reverse floatation, feeding thickener concentrates
2) underflow of its thickener feeds weak magnetic separator, after sorting, produce concentrate and first through slag-removing device, remove impurity substances in ore pulp, then feed strong magnetic machine, weak magnetic tail together feeds the front thickener of flotation with the concentrate merging of strong magnetic machine, the impurity substances of slag-removing device is together thrown tail with the mine tailing of strong magnetic machine
3) the ore pulp underflow after concentrating that feeds thickener before flotation enters anion reverse floatation operation,
4) its flotation operation is scanned operation through roughly selecting flotation device, precision sorting flotation machine, three sections of flotation,
The concentrate of roughly selecting flotation device feeds precision sorting flotation machine, and the mine tailing of roughly selecting flotation device feeds that flotation sweeps, flotation two is swept sweeps with flotation three,
Wherein the concentrate of precision sorting flotation machine is final concentrate, returns together with the concentrate that the mine tailing of precision sorting flotation machine sweeps with flotation and roughly selects flotation device to ore deposit, and flotation two is swept concentrate and returned to flotation and sweep to ore deposit, and flotation three is swept concentrate and returned to flotation two and sweep to ore deposit.
Through the operation of the strong magnetic of bloodstone-anion reverse floatation stream flow process, its comprehensive tailings grade is 8-10%, and high intensity magnetic mineral is 45-50%, and final flotation concentrate is more than 68%.
The length of drainage pipe of the present invention is 50-55m, and the angle of inclination of described drainage pipe is 8-10 °, makes flotation tailing ore pulp can realize gravity flow in pipeline.
The present invention feeds the strong magnetic-anion reverse floatation of bloodstone technique by flotation tailing in the technological process of magnetic iron ore cation reverse flotation, concentrated after mixing with the strong magnetic-anion reverse floatation of bloodstone raw ore slurry, on not impact of the strong magnetic-anion reverse floatation of bloodstone technological process, produce stable smooth operation.Simultaneously by strong magnetic tail, floating tail, floating fine work position all technical are investigated, there are not unusual fluctuations, after the magnetic separation of the strong magnetic-anion reverse floatation of bloodstone technique sorts, comprehensive tailings grade is 8-10%, high intensity magnetic mineral is 45-50%, final flotation concentrate reaches more than 68%, adopt the present invention the flotation tailing in magnetic iron ore flotation process can be reduced to 10%, minimizing metal loss from original 15%.
Claims (1)
1. one kind adopts strong magnetic-anion reverse floatation to reclaim magnetic iron ore flotation tailing technique, comprise the technological process of magnetic iron ore cation reverse flotation and strong magnetic-anion reverse floatation flow process, it is characterized in that: between the disk-type magnetic separator of magnetic iron ore cation reverse flotation technological process and strong magnetic-anion reverse floatation flow process, tilt to be provided with drainage pipe, one end of its drainage pipe is connected with the bottom opening of the chute end of disk-type magnetic separator in the technological process of magnetic iron ore cation reverse flotation, the other end is connected with the front thickener spider of the strong magnetic place in strong magnetic-anion reverse floatation flow process, under concrete step process flow process:
1) by granularity, be-200 orders, in the magnetic iron ore cation reverse flotation technological process of grade 20-25%, the mine tailing of disk-type magnetic separator feeds the front thickener spider of the strong magnetic place in the strong magnetic-anion reverse floatation of bloodstone flow process by drainage pipe, together with the overflow of flowing the cyclone in flow process with the strong magnetic of bloodstone-anion reverse floatation, through the front thickener of strong magnetic, concentrate
2) underflow of its thickener feeds weak magnetic separator, after sorting, produce concentrate and first through slag-removing device, remove impurity substances in ore pulp, then feed strong magnetic machine, weak magnetic tail together feeds the front thickener of flotation with the concentrate merging of strong magnetic machine, the impurity substances of slag-removing device is together thrown tail with the mine tailing of strong magnetic machine
3) the ore pulp underflow after concentrating that feeds thickener before flotation enters anion reverse floatation operation,
4) its flotation operation is scanned operation through roughly selecting flotation device, precision sorting flotation machine, three sections of flotation,
The concentrate of roughly selecting flotation device feeds precision sorting flotation machine, and the mine tailing of roughly selecting flotation device feeds that flotation sweeps, flotation two is swept sweeps with flotation three,
Wherein the concentrate of precision sorting flotation machine is final concentrate, returns together with the concentrate that the mine tailing of precision sorting flotation machine sweeps with flotation and roughly selects flotation device to ore deposit, and flotation two is swept concentrate and returned to flotation and sweep to ore deposit, and flotation three is swept concentrate and returned to flotation two and sweep to ore deposit,
The length of described drainage pipe is 50-55m, and the angle of inclination of described drainage pipe is 8-10 °.
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| CN109174453A (en) * | 2018-08-29 | 2019-01-11 | 周全民 | A kind of recovery process of iron tailings |
| CN112844805A (en) * | 2020-12-21 | 2021-05-28 | 鞍钢集团矿业有限公司 | Re-separation process for micro-fine particle hematite strong magnetic tailings |
| CN112844806A (en) * | 2020-12-21 | 2021-05-28 | 鞍钢集团矿业有限公司 | Ultra-fine grinding dispersion flotation process for strong magnetic hematite tailings |
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Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee before: Anshan Iron & Steel Group Mining Co., Ltd. |