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Method for removing foam generated in collophanite normal-temperature positive-floatation
Description
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Technical field
The present invention relates to a kind of collophane normal temperature direct flotation foam defoaming treatment method.
Background technology
Along with high-grade phosphate rock resource is exhausted, the industrial value of middle grade collophane manifests gradually.Current domestic relative maturity and use comparatively early be the technological process of single reverse flotation de-magging, high-grade low silicon height magnesium collophane during this technique mainly processes, process characteristic is, foam volume is less, and foam is frangible under sour environment, is easy to conveying etc.But along with the exhaustion of the low silicon height of high-grade in this part magnesium ore, the industrial value of the low magnesium collophane of middle-low grade height silicon manifests.Counterfloatating desiliconization technique is mainly contained to the treatment process of the low magnesium collophane of middle-low grade height silicon and direct flotation floats phosphorus technological process, for Counterfloatating desiliconization PROCESS FOR TREATMENT collophane, because medicament research and development and technological development relatively lag behind, also unrealized industrial production, therefore then use direct floatation process flow process.
Use direct floatation process process middle-low grade height silicon low magnesium collophane, there is foam volume large, and under alkaline environment the comparatively sticky and feature such as non-friable of foam, serious impact is caused on the conveying of the unimpeded of technological process and product.
At present in Collophanite flotation technical process, the most frequently used froth breaking mode has high-pressure washing water froth breaking and adds chemical defoamer.High-pressure washing water froth breaking: defoaming effectiveness is high, but there is the problems such as water consumption is large in use procedure, in chats foam, use excessive high-pressure washing water froth breaking simultaneously, chats pulp density will be made to reduce, after middling recurrence, raw ore slurry concentration is caused and have a strong impact on, and then affect mineral processing index and output.Chemistry froth breaking: of a great variety, price costly, mostly exists the problems such as not easily dispersion in use procedure.When foam volume is large, defoamer fully can not contact with foam, and defoaming effectiveness is declined; Defoamer can not use in chats foam, if use defoamer, after middling recurrence raw ore slurry, by severe exacerbation floatation process, makes floatation process non-foaming.
Therefore, need be improved existing defoaming technology.
Summary of the invention
For solving froth pulp not easily transportation problem, the invention provides a kind of collophane normal temperature direct flotation foam defoaming treatment method, the method effectively can eliminate foam, makes the technological process of normal temperature direct flotation process mid-low grade collophanite ore unimpeded, enhances productivity.
The present invention is realized by following technical proposal: a kind of collophane normal temperature direct flotation foam defoaming treatment method, collophane is obtained respectively after direct flotation is roughly selected roughly select froth pulp and rougher tailings ore pulp, wherein rougher tailings ore pulp obtains respectively scanning Tailings Slurry and scanning froth pulp again after direct flotation is scanned, roughly select froth pulp after direct flotation is selected, obtains selected concentrate foam and chats respectively, it is characterized in that: described in roughly select froth pulp after mechanical defoaming, carry out direct flotation more selected, described selected concentrate foam obtains ore pulp after mechanical defoaming, described froth pulp of scanning obtains chats after mechanical defoaming.
Described mechanical defoaming carries out centrifugal treating to froth pulp under the rotating speed of 700 ~ 1400r/min.
It is further preferred that employing diameter is rope form or the rod shape blade of 10 ~ 20mm during described mechanical defoaming, as steel cable or reinforcing bar, Linear cut can be carried out to foam, reach the object of froth breaking.
The present invention roughly selects froth pulp to collophane direct flotation, before entering selected work flow, increase mechanical defoaming device; Scan froth pulp return roughly select work flow before increase mechanical defoaming device; Mechanical defoaming device was increased before selected froth pulp enters pulp conveying pump.The advantage that the present invention possesses and effect:
(1), after foam volume reduces, product mobility improves, and can enter next flotation operation flow process smoothly; (2) air in most of foam is excluded, and the air entering pulp conveying pump along with foam reduces, and the operating efficiency of pump improves thereupon.
Adopt defoaming treatment technique froth breaking of the present invention: defoaming effectiveness can reach about 70%, can not only saving water resource, carrying out smoothly of one ore-dressing technique can also be ensured down.The present invention possesses that overall efficiency is high, energy consumption is low, has greatly saved cost, and can not affect the advantages such as the physicochemical property of handled ore pulp.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Detailed description of the invention
Below by embodiment, the present invention will be further described.
Embodiment 1
1100 xanthan phosphorus ores are obtained respectively roughly selecting froth pulp and rougher tailings ore pulp after direct flotation is roughly selected, wherein rougher tailings ore pulp obtains respectively scanning Tailings Slurry and scanning froth pulp again after direct flotation is scanned, roughly select froth pulp after direct flotation is selected, obtains selected concentrate foam and chats respectively, wherein, describedly roughly select froth pulp under the rotating speed of 700r/min, carry out direct flotation after mechanical defoaming more selected, described selected concentrate foam obtains ore pulp under the rotating speed of 700r/min after mechanical defoaming, described froth pulp of scanning obtains chats under the rotating speed of 700r/min after mechanical defoaming.
During mechanical defoaming, employing diameter is the rope form blade of 24mm, can carry out Linear cut, reach the object of froth breaking to foam.
Embodiment 2
1340 xanthan phosphorus ores are obtained respectively roughly selecting froth pulp and rougher tailings ore pulp after direct flotation is roughly selected, wherein rougher tailings ore pulp obtains respectively scanning Tailings Slurry and scanning froth pulp again after direct flotation is scanned, roughly select froth pulp after direct flotation is selected, obtains selected concentrate foam and chats respectively, wherein, describedly roughly select froth pulp under the rotating speed of 1000r/min, carry out direct flotation after mechanical defoaming more selected, described selected concentrate foam obtains ore pulp under the rotating speed of 1000r/min after mechanical defoaming, described froth pulp of scanning obtains chats under the rotating speed of 1000r/min after mechanical defoaming.
Adopt diameter to be that the rope form blade of 30mm can carry out Linear cut to foam during mechanical defoaming, reach the object of froth breaking.
Embodiment 3
1600 xanthan phosphorus ores are obtained respectively roughly selecting froth pulp and rougher tailings ore pulp after direct flotation is roughly selected, wherein rougher tailings ore pulp obtains respectively scanning Tailings Slurry and scanning froth pulp again after direct flotation is scanned, roughly select froth pulp after direct flotation is selected, obtains selected concentrate foam and chats respectively, wherein, describedly roughly select froth pulp under the rotating speed of 1400r/min, carry out direct flotation after mechanical defoaming more selected, described selected concentrate foam obtains ore pulp under the rotating speed of 1400r/min after mechanical defoaming, described froth pulp of scanning obtains chats under the rotating speed of 1400r/min after mechanical defoaming.
During mechanical defoaming, employing diameter is the rod shape blade of 36mm, can carry out Linear cut, reach the object of froth breaking to foam.
Comparative example 1: with the collophane raw material that embodiment 1 is identical, only replace high-pressure washing water froth breaking.
Comparative example 2: with the collophane raw material that embodiment 1 is identical, only replaces with interpolation chemical defoamer (CL-1 dedicated defoamer) and carries out froth breaking.
Embodiment and comparative example are contrasted:
By upper table, it is large that visual contrast example 1 increases water consumption, causes cost to increase, chats pulp density also can be made to reduce, raw ore slurry concentration is caused to having a strong impact on after middling recurrence, and then affect mineral processing index and output.The chemical reagent price that comparative example 2 adopts, and then add processing cost, even cause ore pulp foam volume in flotation device few, assortment, does not reach the object of ore dressing.
Therefore, adopt defoaming treatment technique froth breaking of the present invention: defoaming effectiveness can reach about 70%, can not only saving water resource, carrying out smoothly of one ore-dressing technique can also be ensured down.The present invention possesses that overall efficiency is high, energy consumption is low, has greatly saved cost, and can not affect the advantages such as the physicochemical property of handled ore pulp.
Claims (2)
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Claims (2)
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1. a collophane normal temperature direct flotation foam defoaming treatment method, collophane is obtained respectively after direct flotation is roughly selected roughly select froth pulp and rougher tailings ore pulp, wherein rougher tailings ore pulp obtains respectively scanning Tailings Slurry and scanning froth pulp again after direct flotation is scanned, roughly select froth pulp after direct flotation is selected, obtains selected concentrate foam and chats respectively, it is characterized in that: described in roughly select froth pulp after mechanical defoaming, carry out direct flotation more selected, described selected concentrate foam obtains ore pulp after mechanical defoaming, described froth pulp of scanning obtains chats after mechanical defoaming.
2. collophane normal temperature direct flotation foam defoaming treatment method according to claim 1, is characterized in that: described mechanical defoaming carries out centrifugal treating to froth pulp under the rotating speed of 700 ~ 1400r/min.