CN103480501B - Phosphate ore floatation method and system - Google Patents
Phosphate ore floatation method and system Download PDFInfo
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- CN103480501B CN103480501B CN201310481692.1A CN201310481692A CN103480501B CN 103480501 B CN103480501 B CN 103480501B CN 201310481692 A CN201310481692 A CN 201310481692A CN 103480501 B CN103480501 B CN 103480501B
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- flotation
- foaming
- mineralization
- eddy flow
- flotation column
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Abstract
The invention discloses a floatation method and a flotation system for floating and separating gangue minerals from collophanite. A phosphate ore floatation method comprises the following steps: before ore slurry enters a floatation column, a rotational flow foaming and mineralization pre-treating process is carried out; the rotational flow foaming and mineralization pre-treatment is used for enabling the ore slurry and compressed air to be jet into a cylindrical barrel body of a rotational flow foaming and mineralization device along the tangential direction to do vortex movement to form a rotational flow; bubbles are dispersed into the ore slurry and are mineralized by cutting and agitation of blades in the barrel body. The barrel body of the rotational flow foaming and mineralization device is the combination of a hollow cone and a cylinder; the blades are distributed in the cylindrical barrel body along the radial direction; a feeding opening of the rotational flow foaming and mineralization device is arranged along the tangential direction of the cylindrical barrel body; a discharging pipe is arranged at a conical end. According to the floatation method and the flotation system, the bubbles can be dispersed into the ore slurry sufficiently before flotation and are mineralized rapidly, the blocking of a foaming device can be avoided, the height of the floatation column is reduced, and a good separation environment is created for the flotation process.
Description
Technical field
The present invention relates to a kind of method for floating and floatation system, particularly a kind of method for floating and system that separates gangue mineral for Collophanite flotation.
Background technology
Phosphorus ore is to produce inorganic phosphorus fertilizer and essential and don't the renewable and alternative Important Mineral Resources of other phosphorus chemical product.Phosphorite Resources in China reserves are at the forefront in the world, but mostly belong to the mid-low grade collophanite ore of difficult choosing, just can reach the standard of producing phosphorus chemical product raw material through beneficiation enrichment.
Flotation is to process the most effective a kind of beneficiation method of collophane.But the feature of collophane is phosphorus ore containing is " glue " noncrystalline particulate aggregate and the tight symbiosis of impure mineral, ore must grind to such an extent that very carefully just can make phosphorus ore containing monomer dissociation.Fine mineral quality is little, momentum is low, and floatation process is difficult to and bubble generation effective collision, causes flotation froth mineralising difficulty; And because granularity is little, specific area large, surface can be high, between phosphorus ore thing and gangue mineral, very easily mutually adhering to reunite affects sharpness of separation; Moreover fine mineral solubility is large, in ore pulp, unavoidable ion concentration is high, flotation pulp solution chemistry complexity.
The special nature of Collophanite flotation, causes it often unsatisfactory with conventional flotation device separating effect.And flotation column has the advantages such as simple in structure, floor space is little, cost of investment is low, the construction period is short, especially easily produce the required microvesicle of fine flotation, increase the surface area of bubble, and then the collision probability of raising bubble and object mineral, can also create better static sorting environment and certain thickness flotation froth cleaning layer simultaneously, reduce ore particle and mutually adhere to the impact of reuniting on sharpness of separation, therefore aspect the thin material of processing, there is larger development space.
But existing flotation column is owing to existing following technical problem to hinder its application in Collophanite flotation: (1) flotation column generally all adopts jet or inflation foam device to produce the required micro-bubble of flotation.This class of phosphorus ore is had to the saline minerals of certain solubility, in floatation process, under certain condition, the mineral component of dissolving easily deposition is attached on the nozzle or pore that foam device is tiny, causes foam device to stop up, and the equipment that affects runs well.(2) mineralising of flotation bubble is to realize by bubble and the mineral mode that adverse current is collided in post.Although the surface area of fine mineral and micro-bubble is large, but under the passive flow environment of flotation column, their striking momentum is still less, break through by collision the probability that hydration shell adheres each other less, bubble mineralization speed is slow, and what phosphate rock floating was used in addition is all fatty acid collecting agent, and dissolution dispersity is selectively relative poor with flotation, causing phosphorus ore floatability itself is not just fine, more obvious on the impact of bubble mineralization speed.(3) time in order to ensure that bubble mineralization is required, the height of flotation column is generally all higher, and this inevitably causes gas-liquid skewness in flotation column, the bad control of flotation conditions, bubble easily annexs or breaks in floating-upward process, produces so-called " magic flower " and " channel " phenomenon.Although the suitable medium of filling in flotation column, the gas-liquid that can control in post distributes, overcome bubble merging and break, avoid " magic flower " and " channel " phenomenon, but the replacing of filling medium and maintenance are inconvenient, passage is easily blocked by sludge, and cylinder dischargeable capacity reduces the disposal ability that also can affect equipment.
Summary of the invention
The object of this invention is to provide a kind of modifying device of Collophanite flotation post, can make bubble before flotation, just permeate into fully in ore pulp and rapid mineralising, after entering flotation column, ore pulp do not need just can realize flotation through mineralization process, improve flotation speed, shorten the time of staying of ore pulp in flotation column, avoid the obstruction of foam device, reduce the height of flotation column, and create good sorting environment for floatation process.
For achieving the above object, adopt technical scheme as follows:
A kind of phosphate rock floating method, ore pulp carries out the pretreatment of eddy flow foaming mineralising before entering flotation column; The pretreatment of described eddy flow foaming mineralising is that cylinder cylindrical shell that ore pulp and compressed air are tangentially injected to eddy flow foaming mineralization device does eddying motion and forms eddy flow, then makes bubble permeate in ore pulp also mineralising through the cutting of the blade that is fixedly installed in cylindrical shell.
A kind of phosphate rock floating system, comprise the agitator of sizing mixing, eddy flow foaming mineralization device and flotation column, the agitator of sizing mixing is communicated with by ore slurry pump with eddy flow foaming mineralization device, the drainage conduit of eddy flow foaming mineralization device is directly communicated with flotation column, between eddy flow foaming mineralization device and ore slurry pump, is provided with compressed air inlet; The cylindrical shell of described eddy flow foaming mineralization device is that the opening part of the hollow cylinder of an end opening and the hollow cone of bottom opening is combined into, blade radially stationary distribution in cylinder cylindrical shell, the charging aperture of eddy flow foaming mineralization device arranges along cylinder cylindrical shell tangential direction, and drainage conduit is arranged at cone cylinder top.
Press such scheme, described blade is right-angled intersection formula blade arranged side by side.
Press such scheme, the upper and lower two ends of described flotation column are provided with stabilier.
Press such scheme, between described upper end stabilier and flotation capital, have rinse water arrangement.
Press such scheme, be also provided with part flow arrangement between at the bottom of described lower end stabilier and flotation column to be communicated with ore slurry pump.
Press such scheme, the fineness ratio of described flotation column is 0.2-0.5.
The present invention is according to the principle of bubble and ore pulp " disorderly state mineralising; static sorting ", at the external special eddy flow foaming of flotation column mineralization device, first ore pulp and the compressed air with certain pressure tangentially enter tapered cylindrical shell by feed pipe, and in cylindrical shell, do eddying motion, the blade cuts that air is radially distributed in cylindrical shell becomes a large amount of even and tiny bubbles, and fully permeates in ore pulp; The strong turbulent flow that eddy flow produces provides a kind of efficient mineralising mode of bubble, and the bubble of disperse is owing to having very high impact kinetic energy with ore particle, therefore mineralising rapidly; Ore pulp after mineralising feeds flotation column by the drainage conduit in tapering, then in flotation column, realizes static sorting.
Beneficial effect of the present invention:
(1) the required micro-bubble of flotation be by blade cuts do fast eddying motion air produce, due to device in there is not tiny nozzle or pore, therefore can not produce blockage problem; In addition bubble can permeate in ore pulp fast fully, thereby void fraction in ore pulp can be higher, the control of flotation conditions convenient operation.
(2) under strong turbulent-flow conditions, fully bubble and the ore particle of disperse have very high impact kinetic energy, and mineralization velocity is very fast, and ore pulp enters after flotation column, at once just can form the flotation of mineralized froth layer.
(3) first disorderly state mineralising in foaming mineralization device of bubble and ore pulp, then enter static sorting in flotation column, belong to " disorderly state mineralising; static sorting " process of real meaning, can overcome in same flotation unit and not only require " disorderly state mineralising " but also require " static sorting ", the conflicting problem of operation controlled condition.
(4) after mineralising in advance, it is very fast that ore pulp enters the flotation speed of flotation column, can meet flotation requirement with short flotation column, not only can reduce equipment investment and installing space, is also convenient to operation and the control of equipment.
Brief description of the drawings
Fig. 1: eddy flow foaming mineralization device schematic diagram.
Fig. 2: phosphate rock floating system and device schematic diagram.
Detailed description of the invention
Following examples are explaination technical scheme of the present invention further, not as the restriction to claim protection domain.
With reference to Fig. 1,2, the agitator 7 of sizing mixing is communicated with by ore slurry pump 6 with eddy flow foaming mineralization device 4, and the drainage conduit 3 of eddy flow foaming mineralization device 4 is directly communicated with flotation column, between eddy flow foaming mineralization device and ore slurry pump, is provided with compressed air inlet; The cylindrical shell of described eddy flow foaming mineralization device 4 is that the opening part of the hollow cylinder of an end opening and the hollow cone of bottom opening is combined into, blade 2 is radially distributed in cylinder cylindrical shell, can be multiple right-angled intersection formula blades arranged side by side, the charging aperture 1 of eddy flow foaming mineralization device 4 arranges along cylinder cylindrical shell tangential direction, and drainage conduit is arranged at cone cylinder top; Described flotation column is provided with stabilier 8 in two ends Shang Xia 5, and can have rinse water arrangement between upper end stabilier and flotation capital, can also be provided with part flow arrangement between at the bottom of lower end stabilier and flotation column to be communicated with ore slurry pump.
With reference to accompanying drawing 2, when phosphate rock floating system works of the present invention, first the ore pulp that is ground to desired particle size is fed to the agitator 7 of sizing mixing, fully act on the floating agent adding in agitator, make object mineral hydrophobization, then be transported to eddy flow foaming mineralization device 4 through ore slurry pump 6, feed in eddy flow foaming mineralization device 4 with certain pressure together with compressed air again, can make bubble before flotation, just permeate into fully in ore pulp and rapid mineralising, in flotation column 5, object mineral overflow and become froth pulp with bubble floating and from top, hydrophilic mineral are discharged and are become underflow product by bottom under Action of Gravity Field, after entering flotation column, ore pulp do not need just can realize flotation through mineralization process, greatly improve flotation speed, shorten the time of staying of ore pulp in flotation column, thereby can reduce the height of flotation column, and create good sorting environment for floatation process.Wherein ore pulp pressure is controlled by pump 6, and size depends primarily on specification or the ore pulp treating capacity of equipment, but at least should ensure that ore pulp can do eddying motion in device 4; Air pressure is by air compressor machine control, and size depends primarily on the required aeration quantity of flotation.
With reference to accompanying drawing 1, first ore pulp and the air with certain pressure tangentially enter cylindrical shell by feed pipe 1, and in cylindrical shell, do eddying motion, being fixedly installed on side by side multiple right-angled intersection formula blades 2 in cylindrical shell cuts compressed air and forms tiny bubble and permeate in ore pulp, bubble in the disorderly state of vortex stream with hydrophobic object mineral grain high velocity impact, form mineral laden bubble, then enter flotation column 5 by drainage conduit 3.
With reference to accompanying drawing 2, in flotation column 5, stabilier 8 is established at upper and lower two ends, and object is froth zone, point constituency at middle part and the underflow district of bottom that flotation column is divided into top, to control the fluidised form of multiphase flow in post, creates good static layer flow point ring selection border.Rinse water arrangement is established in its middle and upper part, can play the effect of impurity in reverse cleaning mineralized froth, and bottom arranges part flow arrangement and separates a certain amount of circulation ore pulp, can, in ensureing ore slurry pump pressure, be convenient to regulate the height of mineral syrup liquid in flotation column.
In addition, the flotation speed of ore pulp in flotation column is very fast, and the holdup time is very short, and flotation column 5 can be used the pillar of fineness ratio 0.2～0.5.
The improved floatation system of the present invention is for the collophane in somewhere, flotation Guizhou, and its bubble disperse is even, and mineralization velocity is fast, system run all right.Under identical regime of agent and grinding particle size condition, compare with flotation device system with conventional flotation post, not only separation index obviously better (in table 1), and also collecting agent consumption can reduce by 10% left and right.
The index contrast of somewhere, the different flotation unit flotation Guizhou of table 1 collophane
| Flotation unit | Phosphorus concentrate P 2O 5Grade/% | Phosphorus concentrate P 2O 5The rate of recovery/% | The efficiency of separation/% |
| Improved system | 30.81 | 82.73 | 20.73 |
| Conventional flotation column system | 30.07 | 79.69 | 18.51 |
| Flotation device system | 29.62 | 75.34 | 16.94 |
Claims (6)
1. a phosphate rock floating system, it is characterized in that comprising size mixing agitator, eddy flow foaming mineralization device and flotation column, the agitator of sizing mixing is communicated with by ore slurry pump with eddy flow foaming mineralization device, the drainage conduit of eddy flow foaming mineralization device is directly communicated with flotation column, between eddy flow foaming mineralization device and ore slurry pump, is provided with compressed air inlet; The cylindrical shell of described eddy flow foaming mineralization device is that the opening part of the hollow cylinder of an end opening and the hollow cone of bottom opening is combined into, blade radially stationary distribution in cylinder cylindrical shell, the charging aperture of eddy flow foaming mineralization device arranges along cylinder cylindrical shell tangential direction, and drainage conduit is arranged at cone cylinder top.
2. phosphate rock floating system as claimed in claim 1, is characterized in that described blade is right-angled intersection formula blade arranged side by side.
3. phosphate rock floating system as claimed in claim 1 or 2, is characterized in that the described upper and lower two ends of flotation column are provided with stabilier.
4. phosphate rock floating system as claimed in claim 3, is characterized in that there is rinse water arrangement between described stabilier and flotation capital.
5. phosphate rock floating system as claimed in claim 3, is provided with part flow arrangement between it is characterized in that at the bottom of described stabilier and flotation column and is communicated with ore slurry pump.
6. the phosphate rock floating system as described in claim 1,2,4,5 any one, is characterized in that the fineness ratio of described flotation column is 0.2-0.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310481692.1A CN103480501B (en) | 2013-10-15 | 2013-10-15 | Phosphate ore floatation method and system |
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| CN201310481692.1A CN103480501B (en) | 2013-10-15 | 2013-10-15 | Phosphate ore floatation method and system |
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| CN103480501A CN103480501A (en) | 2014-01-01 |
| CN103480501B true CN103480501B (en) | 2014-10-15 |
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Families Citing this family (11)
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| CN104801429A (en) * | 2015-04-03 | 2015-07-29 | 河南理工大学 | Combined type column floating selection system |
| CN104841571A (en) * | 2015-05-29 | 2015-08-19 | 武汉工程大学 | Novel flotation column and flotation method thereof |
| CN104841570B (en) * | 2015-06-08 | 2018-11-06 | 武汉工程大学 | A kind of novel flotation column |
| CN107967379A (en) * | 2017-11-08 | 2018-04-27 | 云南磷化集团有限公司 | Computational methods are amplified in Collophanite flotation engineering design |
| CN109290070B (en) * | 2018-09-25 | 2020-12-11 | 北矿机电科技有限责任公司 | Device for weakening foam and ore pulp interface oscillation energy |
| CN109759243B (en) * | 2019-01-31 | 2020-07-03 | 中国矿业大学 | Column sorting device and method for mineralization-flotation separation |
| CN109939840B (en) * | 2019-04-29 | 2023-10-24 | 中国矿业大学 | Forced turbulence mineralization reaction device and method |
| CN110548603A (en) * | 2019-09-27 | 2019-12-10 | 中国恩菲工程技术有限公司 | Foam sorting system |
| KR102442975B1 (en) | 2020-04-17 | 2022-09-15 | 한국원자력연구원 | Float sorting device for selective separation of non-metallic minerals |
| CN114260104B (en) * | 2021-12-23 | 2023-08-08 | 矿冶科技集团有限公司 | Flotation equipment and flotation method suitable for collecting foam products |
| CN116625990B (en) * | 2023-06-05 | 2023-12-08 | 冠礼控制科技（上海）有限公司 | Bubble-resistant high-stability refractometer |
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| CN2221998Y (en) * | 1995-07-13 | 1996-03-13 | 煤炭科学研究总院唐山分院 | Pressing filter machine for flotation ore concentrate |
| CN2766961Y (en) * | 2005-01-11 | 2006-03-29 | 李宾 | Rotary stream force field flotation column |
| CN2905226Y (en) * | 2005-11-29 | 2007-05-30 | 胡满营 | Mineralization device and hydraulic pressure type self-absorption air floatation column containing the same |
| CN201260989Y (en) * | 2008-09-17 | 2009-06-24 | 中南大学 | Steady flow baffle for flotation column gas diffusion and fluid control |
| CN101474599B (en) * | 2009-01-19 | 2012-01-11 | 太原理工大学 | Rotational flow and jet flow inflating method and device thereof |
| CN201862462U (en) * | 2010-06-13 | 2011-06-15 | 中国铝业股份有限公司 | Vertical screw-stirring ore-grinding and floating integrated device |
| CN102327818B (en) * | 2011-09-30 | 2013-12-25 | 湖南长高矿山机电设备有限公司 | Floatation device |
| CN203044172U (en) * | 2013-01-25 | 2013-07-10 | 山东科技大学 | Interference bed self-circulation flotation column |
| CN203196764U (en) * | 2013-03-07 | 2013-09-18 | 荆门市格林美新材料有限公司 | Mechanical stirring type flotation machine |
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