CN103316853A - Method for sorting and pre-enriching lean hematite by using X-ray radiation - Google Patents
Method for sorting and pre-enriching lean hematite by using X-ray radiation Download PDFInfo
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- CN103316853A CN103316853A CN2013102250435A CN201310225043A CN103316853A CN 103316853 A CN103316853 A CN 103316853A CN 2013102250435 A CN2013102250435 A CN 2013102250435A CN 201310225043 A CN201310225043 A CN 201310225043A CN 103316853 A CN103316853 A CN 103316853A
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Abstract
The invention relates to a method for sorting and pre-enriching lean hematite by using X-ray radiation. The invention belongs to the technical field of mineral processing. The method comprises the steps that: copper-containing ores are crushed to a size below 150mm by using a crusher; the crushed material is sieved by using a sieving machine with a mesh size greater than or equal to 20mm; on-sieve material is delivered to an X-ray radiation sorting machine through a feeder; a sorting threshold is set in the control system of the X-ray radiation sorting machine according to the iron content in crude ore; and after the sorting of the X-ray radiation sorting machine, concentrate and tailings are obtained. The method provided by the invention is domestically initiative. Target component grade of processed ore is low, mechanical and automation degrees are high, ore-sorting cost is saved, the grade of selected material iron of a concentrator is greatly improved, and equipment utilization rate is substantially improved. Also, the process provided by the invention has the advantages of reasonable technology and stable running. With the method, industrialization of lean hematite pre-sorting can be easily realized, and concentrator economic and technical indicators and comprehensive benefits can be greatly improved.
Description
Technical field
The invention belongs to technical field of mineral processing, particularly a kind of method that adopts x-ray radiation sorting preenrichment lean hematite ore.
Background technology
Iron is to find in the world the earliest, utilizes the extensivelyst, and consumption also is maximum a kind of metal, and its consumption accounts for about 95% of metal total flow.Iron ore is mainly used in steel and iron industry, smelts the different pig iron (phosphorus content is generally more than 2%) and the steel (phosphorus content is generally below 2%) of phosphorus content.Steel product is widely used in each department of national economy and people's lives various aspects, is the metal material that modernization industry is most important and application is maximum, has now become the mainstay industry of social development, occupies epochmaking status in national economy.
China's iron ore resource was found out 60,700,000,000 tons of reserves in 2006, and wherein the high-grad iron ore deposit resource only has 1,100,000,000 tons, only accounted for the less than 2% of the whole resource reserves of iron ore, and all the other 98% are poor iron ore deposit.Compare with the main iron ore deposit in world country Brazil, Australia, the most of iron ore deposits of China are the low-grade iron ore resource, and strip mining transformation ore average grade only has 30.5%, and the average grade of Extremely lean iron ore only has 15%.Iron mineral is of a great variety, and the iron mineral of having found at present and iron-bearing mineral approximately more than 300 are planted, and wherein common are more than 170 and plants.But under the current techniques condition, what have industrial utilization value mainly is magnetic iron ore, bloodstone, maghemite, ilmenite, limonite and siderite etc.In above-mentioned many Iron Ore Types, bloodstone is embarrass choosing a kind of, and this class grade of ore is low, disseminated grain size is thin, mineral composition is complicated, sorts difficulty.After the eighties, the technique of preparing aspect is updated the research of technological process, equipment and the new varieties medicaments such as calcining magnetic separation, wet high-intensity magnetic separation, weak magnetic flotation and gravity treatment, and concentrate grade, metal recovery rate are improved constantly.But for lean hematite ore, feasible processing method is also few, particularly has no report both at home and abroad for the beneficiation method that adopts X-radiation selection lean hematite ore.
Selection is a kind of comparatively common solid material separation method, and its history that is applied to sorting mineral is comparatively long.Before the mordern industry epoch opened, selection separated the main judgement that relies on artificial experience, and the workman utilizes visible light to treat sorting ore and differentiates, then artificially ore is divided into lean ore piece and rich ore piece.After the second industrial revolution, particularly in the nuclear physics research and development to suitable one period of level, selection has realized combination with high-energy ray (such as laser, X ray and gamma-rays) and the application of electronic computer technology, produced thus the new branch of science research direction of x radiation x ore dressing, the selection take ray as the discriminating instrument is also really risen from a kind of traditional empirical method and is become a special kind of skill sexology.
The x radiation x ore dressing is mainly used in the granular and massive ore of sorting, and the raw meal particle size rank is usually between between the 20mm to 150mm.This technology is applied to the ore pre-selection stage, and its purpose is to sub-elect barren rock or the country rock that a part of useful component grade is lower than required standard.
Summary of the invention
For the deficiencies in the prior art, the purpose of this invention is to provide a kind of lean hematite ore x-ray radiation Pre-sorting method, utilize the iron grade difference between the lean hematite nugget, set and reasonably separate threshold value and sort flow process, utilize the x-ray radiation separator that raw ore is sorted in advance, the rich ore piece is chosen, abandon part low-grade tailings or barren rock, obtain relatively high-grade final concentrate, select factory's Beneficiation Feed Grade with raising, reduce and to select factory's operating cost, and make and cross low mining barren rock or the country rock of storing up processing can only done because of grade and utilized.
A kind of method that adopts x-ray radiation sorting preenrichment lean hematite ore of the present invention, carry out according to the following steps:
(1) fragmentation: iron-stone is crushed to below the 150mm by disintegrating machine;
(2) screening: sieve more than or equal to the screening machine of the 20mm material after to fragmentation with screen size, on-the-sieve material is transported to x-ray radiation separator preliminary election operation ore storage bin by belt conveyer;
(3) x-ray radiation separator preliminary election: the on-the-sieve material that step (2) is obtained by batcher is given on the x-ray radiation separator, in the control system of x-ray radiation separator, set the threshold value that concentrate and tailings separates according to the iron content in the raw ore, threshold range is 0.06-0.30, after process x-ray radiation separator sorts, threshold value enters the concentrate receiving slit greater than the ore of setting threshold, and threshold value enters the mine tailing receiving slit less than the ore of setting threshold;
(4) carry smart mine tailing: respectively the concentrate and tailings that the x-ray radiation separator separates is transported with belt conveyor system, concentrate enters and selects one treatment process under the factory, and mine tailing directly is transported to tailings reservoir for piling.
Wherein, the mass content of iron is 12 ~ 22% in the lean hematite ore described in the step (1), and is misproportion dissemination;
It is 25 ~ 35% that the main useful component of concentrate that obtains in the step (3) contains Fe by weight percentage, and surplus is gangue mineral;
The rate of recovery of the main useful component Fe of concentrate that obtains in the step (3) is 60 ~ 80%, and surplus is gangue mineral;
The concentrate yield that obtains in the step (3) is 30 ~ 50%, and surplus is gangue mineral.
Beneficial effect of the present invention is:
Method of the present invention is domestic initiation, the ore object composition grade of processing low, machinery and automaticity are high, save beneficiation cost, after process x-ray radiation separator is thrown tail in advance, select the selected material iron grade of factory greatly to improve, significantly improved utilization rate of equipment and installations; This technology is reasonable, stable simultaneously, is easy to realize containing the industrialization of lean hematite ore preliminary election, increases substantially ore dressing plant economic and technical norms and comprehensive benefit.
Description of drawings
Fig. 1 is lean hematite ore x-ray radiation Preconcentration schematic flow sheet of the present invention;
Fig. 2 is lean hematite ore x-ray radiation preenrichment equipment outline drawing of the present invention;
Fig. 3 is lean hematite ore x-ray radiation preenrichment equipment grading principle schematic diagram of the present invention.
Among the figure, 1, primary radiation; 2, auxiliary radiation; 3, rich ore; 4, lean ore; 5, electromagnetic separation; 6, detection part; 7, X ray parts; 8, collimator; 9, charging tray.
The specific embodiment
The present invention will be further described below in conjunction with embodiment.
The disintegrating machine model that adopts in the embodiment of the invention is that H7800EC(disintegrating machine gape size is variable), the belt conveyer model is the DT II, screening machine is LBS-300-732 (screen size is variable), x-ray radiation separator model is CP Φ-4-3 Π-150, separator operating system is industrial computer, and the separation threshold value of concentrate and tailings is set in native system.
The Anshan Area, Liaoning Province lean hematite ore raw ore of selecting in the embodiment of the invention.Valuable mineral mainly is bloodstone, TFe grade 17.63%, and gangue mineral is mainly quartz, is the iron content aluminosilicate minerals such as biotite, chlorite, olivine secondly.
Embodiment 1
(1) fragmentation: lean hematite ore is crushed to below the 150mm by disintegrating machine;
(2) screening: sieve with the screening machine of the screen size 90mm material after to fragmentation, on-the-sieve material (+90mm) otherwise processed, undersize material sieves with the screening machine of screen size 60mm, undersize material (60mm) otherwise processed, on-the-sieve material (90mm+60mm) be transported to x-ray radiation separator preliminary election operation ore storage bin by belt conveyer, the on-the-sieve material ferrous grade is 17.42%, and all the other are gangue mineral;
(3) x-ray radiation separator preliminary election: the on-the-sieve material that step (2) is obtained by batcher is given on the x-ray radiation separator, the threshold value of separating according to the setting of the Fe content in raw ore concentrate and tailings in the control system of x-ray radiation separator is 0.15, after process x-ray radiation separator sorts, threshold value will be considered to concentrate and enter the concentrate receiving slit greater than 0.15 ore, and threshold value will be thought mine tailing and be fallen into the mine tailing receiving slit by system less than 0.15 ore;
(4) mine tailing that step (3) is obtained is transported to x-ray radiation separator ore storage bin by belt conveyor again, and will separate Threshold is 0.10, again sorts, and then the gained concentrate is chats, and the gained mine tailing is true tailings, weighs, and calculates productive rate;
(5) carry smart mine tailing: respectively the concentrate and tailings that the x-ray radiation separator separates is transported with belt conveyor system, concentrate enters and selects one treatment process under the factory, and mine tailing directly is transported to tailings reservoir for piling.
The productive rate of concentrate, chats and mine tailing, grade and the rate of recovery are as shown in table 1 in the assorting room.
The productive rate of concentrate, chats and mine tailing, grade and the rate of recovery in table 1 assorting room
(1) screening: (be that the screening machine of 30mm sieves with screen size 60mm) with resulting undersize material in embodiment 1 step (2), undersize material (30mm) otherwise processed, on-the-sieve material is transported to x-ray radiation separator ore storage bin by belt conveyor, the grade of iron is 19.48% in the on-the-sieve material lean hematite, and all the other are gangue mineral;
(2) x-ray radiation separator preliminary election: the on-the-sieve material that step (1) is obtained by batcher is given on the x-ray radiation separator, the threshold value of separating according to the setting of the iron content in raw ore concentrate and tailings in the control system of x-ray radiation separator is 0.12, after process x-ray radiation separator sorts, threshold value will be considered to concentrate and enter the concentrate receiving slit greater than 0.12 ore, and threshold value will be thought mine tailing and be fallen into the mine tailing receiving slit by system less than 0.12 ore;
(3) carry smart mine tailing: respectively the concentrate and tailings that the x-ray radiation separator separates is transported with belt conveyor system, concentrate enters and selects one treatment process under the factory, and mine tailing directly is transported to tailings reservoir for piling.
The grade of iron is weighed respectively, chemically examined to concentrate, mine tailing, calculates productive rate and the rate of recovery.The grade of concentrate and tailings and the rate of recovery are as shown in table 2 in the assorting room.
The productive rate of concentrate, chats and mine tailing, grade and the rate of recovery in table 2 assorting room
(1) fragmentation: lean hematite ore is crushed to below the 150mm by disintegrating machine;
(2) screening: sieve with the screening machine of the screen size 90mm material after to fragmentation, undersize material (90mm) otherwise processed, on-the-sieve material is transported to x-ray radiation separator preliminary election operation ore storage bin by belt conveyer, the grade of iron is 17.66% in the on-the-sieve material hematite, and all the other are gangue mineral;
(3) x-ray radiation separator preliminary election: the on-the-sieve material that step (2) is obtained by batcher is given on the x-ray radiation separator, the threshold value of separating according to the setting of the iron content in raw ore concentrate and tailings in the control system of x-ray radiation separator is 0.18, after process x-ray radiation separator sorts, threshold value will be considered to concentrate and enter the concentrate receiving slit greater than 0.18 ore, and threshold value will be thought mine tailing and be fallen into the mine tailing receiving slit by system less than 0.18 ore;
(4) carry smart mine tailing: respectively the concentrate and tailings that the x-ray radiation separator separates is transported with belt conveyor system, concentrate enters and selects one treatment process under the factory, and mine tailing directly is transported to tailings reservoir for piling.
The grade of iron is weighed respectively, chemically examined to concentrate, mine tailing, and the productive rate of concentrate and tailings, grade and the rate of recovery are as shown in table 3 in the assorting room.
The productive rate of concentrate, chats and mine tailing, grade and the rate of recovery in table 3 assorting room
Claims (7)
1. method that adopts x-ray radiation sorting preenrichment lean hematite ore is characterized in that carrying out according to the following steps:
(1) fragmentation: lean hematite ore is crushed to below the 150mm by disintegrating machine;
(2) screening: sieve more than or equal to the screening machine of the 20mm material after to fragmentation with screen size, on-the-sieve material is transported to x-ray radiation separator preliminary election operation ore storage bin by belt conveyer;
(3) x-ray radiation separator preliminary election: the on-the-sieve material that step (2) is obtained by batcher is given on the x-ray radiation separator, in the control system of x-ray radiation separator, set the threshold value that concentrate and tailings separates according to the iron content in the raw ore, threshold range is 0.06 ~ 0.30, after process x-ray radiation separator sorts, threshold value enters the concentrate receiving slit greater than the ore of setting threshold, and threshold value enters the mine tailing receiving slit less than the ore of setting threshold;
(4) carry smart mine tailing: respectively the concentrate and tailings that the x-ray radiation separator separates is transported with belt conveyor system, concentrate enters and selects one treatment process under the factory, and mine tailing directly is transported to tailings reservoir for piling.
2. a kind of method that adopts x-ray radiation sorting preenrichment lean hematite ore according to claim 1, if the iron grade is higher than the on-the-spot actual requirement of commercial Application in the mine tailing that it is characterized in that obtaining in the step (3), then mine tailing is transported to x-ray radiation separator ore storage bin by belt conveyor again, to separate threshold value and in 0.02 ~ 0.20 scope, get the threshold value of using less than in the step (3), again sort, make tailings grade reach requirement, then the gained concentrate is chats, and the gained mine tailing is true tailings.
3. a kind of method that adopts x-ray radiation sorting preenrichment lean hematite ore according to claim 1 is characterized in that x-ray radiation separator feed is lean hematite ore, and iron mineral is the main purpose mineral, and ferro element misproportion dissemination in ore.
4. a kind of method that adopts x-ray radiation sorting preenrichment lean hematite ore according to claim 1, the mass content that it is characterized in that iron in the lean hematite ore described in the step (1) is 12 ~ 22%, and is misproportion dissemination.
5. a kind of method that adopts x-ray radiation sorting preenrichment lean hematite ore according to claim 1, it is characterized in that the main useful component of concentrate that obtains in the step (3) by weight percentage iron content be 25 ~ 35%, surplus is gangue mineral.
6. a kind of method that adopts x-ray radiation sorting preenrichment lean hematite ore according to claim 1 is characterized in that the main useful component rate of recovery of concentrate that obtains in the step (3) is Fe60 ~ 80%, and surplus is gangue mineral.
7. a kind of method that adopts x-ray radiation sorting preenrichment lean hematite ore according to claim 1 is characterized in that the concentrate yield that obtains in the step (3) is 30 ~ 50%, and surplus is gangue mineral.
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| CN106994447A (en) * | 2017-06-02 | 2017-08-01 | 南华大学 | A kind of equipment that sorting is integrated for radioactive uranium ore concentrate, lean ore and barren rock |
| CN107051919A (en) * | 2017-05-27 | 2017-08-18 | 北京中矿东方矿业有限公司 | A kind of pneumatic barren rock separation actuator |
| CN107175220A (en) * | 2017-06-02 | 2017-09-19 | 南华大学 | A kind of equipment for sorting radioactive uranium ore and barren rock |
| CN108067435A (en) * | 2016-11-18 | 2018-05-25 | 浙江力拓机电科技有限公司 | Ore screening installation and its transmitting device and ore transmission method |
| CN109894268A (en) * | 2019-03-26 | 2019-06-18 | 赣州金环磁选设备有限公司 | A kind of wolframite throwing tail proposes the beneficiation method of essence |
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| CN108067435A (en) * | 2016-11-18 | 2018-05-25 | 浙江力拓机电科技有限公司 | Ore screening installation and its transmitting device and ore transmission method |
| CN107051919A (en) * | 2017-05-27 | 2017-08-18 | 北京中矿东方矿业有限公司 | A kind of pneumatic barren rock separation actuator |
| CN107175220A (en) * | 2017-06-02 | 2017-09-19 | 南华大学 | A kind of equipment for sorting radioactive uranium ore and barren rock |
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| CN109894268B (en) * | 2019-03-26 | 2020-07-14 | 赣州金环磁选设备有限公司 | Beneficiation method for tailing discarding and refining of wolframite |
| CN109894268A (en) * | 2019-03-26 | 2019-06-18 | 赣州金环磁选设备有限公司 | A kind of wolframite throwing tail proposes the beneficiation method of essence |
| CN110052421B (en) * | 2019-04-29 | 2021-07-27 | 山东华特磁电科技股份有限公司 | Coal mine sorting method based on X-ray sensing |
| CN110052421A (en) * | 2019-04-29 | 2019-07-26 | 山东华特磁电科技股份有限公司 | A kind of coal mine method for separating based on X-ray sensing |
| CN110433954A (en) * | 2019-06-06 | 2019-11-12 | 河南黄金产业技术研究院有限公司 | A kind of richness golden beneficiation method of gold ore and golden barren rock |
| CN110433954B (en) * | 2019-06-06 | 2021-07-09 | 河南黄金产业技术研究院有限公司 | Gold-rich beneficiation method for gold ore and gold barren rock |
| CN112024118A (en) * | 2020-07-24 | 2020-12-04 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Short-process lump ore magnetizing roasting process method |
| CN112149283A (en) * | 2020-08-28 | 2020-12-29 | 北京科技大学 | Method for evaluating batch sorting feasibility of ores |
| CN113020210A (en) * | 2021-03-06 | 2021-06-25 | 昆明冶金高等专科学校 | Ferro-manganese ore radial mineral separation and resource comprehensive utilization process |
| CN113020210B (en) * | 2021-03-06 | 2023-09-26 | 昆明冶金高等专科学校 | Mineral processing and resource comprehensive utilization process for ferromanganese ore rays |
| CN113500014A (en) * | 2021-07-08 | 2021-10-15 | 湖州霍里思特智能科技有限公司 | Method and system for intelligently sorting based on dynamic adjustment of threshold |
| WO2023280302A1 (en) * | 2021-07-08 | 2023-01-12 | 湖州霍里思特智能科技有限公司 | Method and system for performing ore pre-dressing on basis of hierarchical array-type intelligent dressing |
| WO2023035537A1 (en) * | 2021-09-09 | 2023-03-16 | 鞍钢集团北京研究院有限公司 | Beneficiation method for high carbonate refractory iron ore |
| CN114618791A (en) * | 2022-01-26 | 2022-06-14 | 中国恩菲工程技术有限公司 | Iron removing method and device for iron ore semi-autogenous grinding hard stone |
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Application publication date: 20130925 |