CN103272704A - Selective flocculation desliming mineral separation process and treatment method for mud produced by selective flocculation desliming mineral separation process - Google Patents
Selective flocculation desliming mineral separation process and treatment method for mud produced by selective flocculation desliming mineral separation process Download PDFInfo
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- CN103272704A CN103272704A CN2013102351949A CN201310235194A CN103272704A CN 103272704 A CN103272704 A CN 103272704A CN 2013102351949 A CN2013102351949 A CN 2013102351949A CN 201310235194 A CN201310235194 A CN 201310235194A CN 103272704 A CN103272704 A CN 103272704A
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Abstract
The invention discloses a treatment method for mud produced by a selective flocculation desliming mineral separation process. The method includes adding flocculants calcium-containing compounds into the mud, then adding polymeric flocculants, performing sedimentation and clarification treatment on uniformly mixed mud, using supernatant after sedimentation and clarification treatment as backwater of the mineral separation process for recycling, and delivering sediment sand after sedimentation and clarification treatment to a tailing pond. The invention further discloses the selective flocculation desliming mineral separation process capable of matching with the method for treating the produced mud. The process includes grinding minerals until minerals with the mesh of -200 account for 85%-95%, then performing first-time multistage flocculation desliming; and grinding sediment sand obtained after the first-time multistage flocculation desliming until minerals with the mesh of -500 account for more than 90%, then performing second-time multistage flocculation desliming, mixing mud obtained after the first-time multistage flocculation desliming and the second-time multistage flocculation desliming, and treating the mud by the treatment method intensively. The method and the process have the advantages of easiness in operation, small chemical dosage, low cost, greenness, environmental friendliness and the like.
Description
Technical field
The present invention relates to output wastewater treatment method in a kind of ore dressing plant, relate in particular to a kind of method that the high alkalinity mine tailing mud of ore dressing plant flocculation desliming technology output is handled.
Background technology
The main feature of Mineral Resources in China is " poor ", " carefully ", " mixing ", and average grade is low, and the mineral resources proportion of complicated difficult choosing is bigger.Along with the fast development of China's steel industry, the demand of finished iron ore is increased day by day, the easy iron ore amount that can exploit utilization reduces gradually, the not only dilution day by day of object that ore dressing is handled, and also the disseminated grain size of valuable mineral is more and more finer.The weakly magnetic iron ore of fine grain teeth cloth is easy argillization in the fine grinding process, has serious mud and covers phenomenon, and these class ores of technology intractable such as traditional gravity treatment, magnetic separation, flotation also are difficult to obtain satisfied effect.
From the seventies in 20th century so far, repetition test through decades studies show that, handle particulate and contain clay ironstone, selective flocculation and process integration thereof are a kind of up-and-coming sorting process, adopt that a large amount of mud of the ore dressing plant desliming system output of selective flocculation technology have that granularity is fine, basicity is high, the characteristics of high dispersive, difficult sedimentation; Desliming mud if not in factory sedimentation in advance carry out clarifying treatment, then not only need a large amount of new water to replenish the ore dressing plant, and then increase considerably beneficiation cost and the difficulty that supplies water, and a large amount of fine ore muds returns flotation, the iron concentrate grade plummet of floatation system will be caused, fine ore mud directly is discharged into the mine tailing storehouse without sedimentation in advance, and the sludge that then suspends in a large number can shorten the service life in mine tailing storehouse, has also brought great potential safety hazard simultaneously.
In view of the above-mentioned crucial difficult problem that the ore dressing plant of adopting flocculation desliming technology faces, need the method for wastewater treatment of a kind of simple and reliable, easy enforcement, cost is low, efficient is high high alkalinity mine tailing mud sedimentation clarification badly.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, provide a kind of simple to operate easily, dosing is little, cost is low and can reduce the processing method of the selective flocculation desliming ore-dressing technique output mud of plant wastes discharging greatly, also correspondingly provides selective flocculation desliming ore-dressing technique a kind of and that the aforementioned processing method is supporting.
For solving the problems of the technologies described above, the technical scheme that the present invention proposes is a kind of processing method of selective flocculation desliming ore-dressing technique output mud, may further comprise the steps: in described mud, add the flocculating agent calcium containing compound earlier, add high polymer coagulant again, mud behind the mixing is carried out the sedimentation clarifying treatment, supernatant liquor after the sedimentation clarifying treatment carries out recycling (backwater preferably is delivered in the flocculation desliming system or floatation system that selects factory) as the backwater of ore-dressing technique, and the sand setting after the sedimentation clarifying treatment is delivered to the mine tailing storehouse.
In the above-mentioned processing method, described flocculating agent calcium containing compound is preferably Ca (OH)
2, quick lime (CaO), calcium hypochlorite Ca (ClO)
2Or calcium chloride (CaCl
2).Preferred, when described flocculating agent calcium containing compound was calcium hypochlorite or calcium chloride, its addition preferably was controlled to be every cube of mud and adds 200g～10000g.When described flocculating agent calcium containing compound is Ca (OH)
2Or during quick lime, the pH value of its addition control in making mud remains under the alkali condition be advisable (general pH 〉=9), and preferably the pH value is 9～12.
In the above-mentioned processing method, described high polymer coagulant is preferably polyacrylamide and (also claims 3
#Flocculant).
In the above-mentioned processing method, the addition of described polyacrylamide preferably is controlled to be every cube of mud and adds 1g～50g.
In the above-mentioned processing method, the equipment that described sedimentation clarifying treatment adopts is preferably concentrator, depositing reservoir or mine tailing storehouse.
The special preferred pin of technique scheme of the present invention is to the mud of suspension content 〉=2% of flocculation desliming technology institute output, the difficult sedimentation of the mud of this class output, difficult clarification and can not recycle, this class mud badly influences direct motion and the technology cost in ore dressing plant.Technique scheme of the present invention is mainly added a large amount of electrolyte (calcium containing compound) in the desliming mud and is combined with high polymer coagulant based on adopting, and utilize the bridge linking effect that forms between high polymer coagulant and the electrolyte, thereby realize fast carrying out rapid subsidence behind the microfine sludge particle floc sedimentation, to guarantee carrying out smoothly of ore-dressing technique.
As a total technical conceive, the present invention also provides a kind of selective flocculation desliming ore-dressing technique that can supporting processing output mud, may further comprise the steps: earlier ore (generally referring to rough concentrate) ore grinding to-200 orders are accounted for 85%～95%, carry out primary multistage flocculation desliming (being preferably more than two sections) then; Sand setting after multistage flocculation desliming ore grinding to-500 orders again accounts for more than 90%, carry out secondary multistage flocculation desliming (being preferably more than two sections) again, mud after twice the multistage flocculation desliming is merged, and concentrate and adopt the processing method of the invention described above to handle.
In the above-mentioned selective flocculation desliming technology, the mud after the described multistage flocculation desliming merges the back suspension content preferably 〉=2%.
Compared with prior art, the invention has the advantages that:
(1) the present invention adjusts agent (preferred calcium containing compound) by interpolation flocculating agent and pH in the sludge mud of flocculation desliming technology institute output earlier and to suitable pH value, makes the excessive metallic ions Ca that produces in the interpolation process
2+Change the surface nature that the subparticle sludge repels mutually, and in conjunction with the cooperative effect of high polymer coagulant, make the agglomerating back sedimentation of microfine sludge rapid flocculation, the primary water of gained recycles in selecting factory's desliming and floatation system, thereby realizes selecting the high-efficiency cleaning utilization of factory's deslimed wastewater; Backwater amount 〉=85% of the clarification that processing method of the present invention obtains, backwater circulation can be saved desliming and floating agent after using in a large number.
(2) processing method of the present invention is simple to operate, easy, and dosing is little, and cost is low, and can reduce the plant wastes discharging greatly, makes the environmental protection more of whole ore-dressing technique.
Description of drawings
Fig. 1 is the process chart of the processing method of selective flocculation technology output mud in the embodiment of the invention.
The specific embodiment
Below in conjunction with Figure of description and concrete preferred embodiment the present invention is further described, but protection domain not thereby limiting the invention.
Embodiment 1:
Certain microfine iron ore selects factory to adopt the mud of selective flocculation desliming technology output to use processing method of the present invention to carry out beneficiation wastewater and handles.This selects, and secondly iron mineral is magnetic iron ore based on bloodstone in the iron ore of factory and office reasons, and secondly gangue mineral is sericite, chlorite, feldspar, actinolite, the tremolite, calcite, dolomite and zoisite etc. based on quartz.
Select in the ore-dressing technique of factory, after it earlier is milled to iron ore in-200 orders and accounts for 85%～95%, carry out two sections flocculation deslimings then, sand setting after the desliming again ore grinding to after-500 orders account for 90%, carry out three sections flocculation deslimings again, carry out the sedimentation clarifying treatment to the sludge mud (content of suspension 〉=2%) that amounts to five sections flocculation desliming gained is concentrated, as shown in Figure 1, concrete steps are as follows:
(1) with the desliming slurry transportation of gained after the above-mentioned desliming to Buffer Pool, in mud, add milk of lime Ca (OH) earlier
2, the addition of milk of lime is controlled to be every cube of mud and adds 200g～10000g, makes the pH value in the mud transfer to 9～12;
(2) in the mud that passes through after step (1) is handled, add polyacrylamide again, the addition of polyacrylamide is controlled to be every cube of mud and adds 2g～20g, enters behind mixed mud process Buffer Pool and the transport pipeline nature mixing and carries out the sedimentation clarifying treatment in the concentrator;
(3) supernatant liquor after the sedimentation clarifying treatment is back to as the backwater of ore-dressing technique and carries out recyclingly in desliming and the floatation system, and the sand setting after the sedimentation clarifying treatment is then delivered to the mine tailing storehouse.
After handling the sludge mud of flocculation desliming gained, the processing method that adopts above-mentioned present embodiment can get the cycling use of water of high-quality, backwater amount 〉=85% of this backwater, suspension content≤50ppm.PH value 〉=9.Method of the present invention has advantages such as technology is simple, small investment, cost is low, the sedimentation clarifying speed fast, the backwater amount is big, and the gained backwater returns and selects factory to recycle in the process, flotation and flocculation desliming medicament can be saved significantly, also ore-dressing technique water, energy-conservation resource can be significantly reduced.
Embodiment 2:
Adopt processing method of the present invention to select the industrial implementation result of factory at certain fine grain teeth cloth iron ore.This selects, and iron mineral mainly is bloodstone in the iron ore of factory and office reasons, and inferior is magnetic iron ore, half illusion～martite and limonite; Secondly gangue mineral is chlorite, sericite, feldspar and apatite based on quartz, and other trace quantity mineral is still seen actinolite, calcite, zircon, rutile and aspidelite etc.
Select in the ore-dressing technique of factory, after it earlier is milled to iron ore in-200 orders and accounts for 70%～80%, carrying out a low intensity magnetic separation, low intensity magnetic separation mine tailing carries out a high intensity magnetic separation and throws tail, the weak magnetic of gained, strong magnetic mixed coarse concentrate regrinding carry out two sections flocculation deslimings after-325 orders account for 90%～95%, sand setting after desliming ore grinding again carries out two sections flocculation deslimings after-500 orders account for more than 90%, to sludge mud and the concentrated sedimentation clarifying treatment of carrying out of high intensity magnetic separation mine tailing (content of suspension 〉=2%) that amounts to four sections flocculation desliming gained, as shown in Figure 1, concrete steps are as follows:
(1) the mine tailing ore pulp with gained after above-mentioned high intensity magnetic separation process and the desliming is delivered in the Buffer Pool, adds milk of lime earlier in mud, and the addition of milk of lime is controlled to be every cube of mine tailing mud and adds 1000g～10000g, makes the pH value in the mud transfer to 9～12;
(2) in the mud that passes through after step (1) is handled, add polyacrylamide again, the addition of polyacrylamide is controlled to be every cube of mud and adds 1g～15g, enters behind mixed mud process Buffer Pool and the transport pipeline nature mixing and carries out the sedimentation clarifying treatment in the concentrator;
(3) supernatant liquor after the sedimentation clarifying treatment is back to as the backwater of ore-dressing technique and carries out recyclingly in desliming, magnetic separation and the floatation system, and the sand setting after the sedimentation clarifying treatment is then delivered to the mine tailing storehouse.
After handling the sludge mud of flocculation desliming gained and high intensity magnetic separation mine tailing, the processing method that adopts above-mentioned present embodiment can get the cycling use of water of high-quality, backwater amount 〉=85% of this backwater, suspension content≤50ppm, pH value 〉=9.
Claims (10)
1. the processing method of selective flocculation desliming ore-dressing technique output mud, may further comprise the steps: in described mud, add the flocculating agent calcium containing compound earlier, add high polymer coagulant again, mud behind the mixing is carried out the sedimentation clarifying treatment, supernatant liquor after the sedimentation clarifying treatment carries out recycling as the backwater of ore-dressing technique, the sand setting after the sedimentation clarifying treatment is delivered to the mine tailing storehouse.
2. processing method according to claim 1, it is characterized in that: described flocculating agent calcium containing compound is Ca (OH)
2, quick lime, calcium hypochlorite or calcium chloride.
3. processing method according to claim 2, it is characterized in that: described flocculating agent calcium containing compound is calcium hypochlorite or calcium chloride, its addition is controlled to be every cube of mud and adds 200g～10000g.
4. processing method according to claim 2, it is characterized in that: described flocculating agent calcium containing compound is Ca (OH)
2Or quick lime, the pH value of its addition control in making mud remains 9～12.
5. according to claim 1,2,3 or 4 described processing methods, it is characterized in that: described high polymer coagulant is polyacrylamide.
6. processing method according to claim 5 is characterized in that: the addition of described polyacrylamide is controlled to be every cube of mud and adds 1g～50g.
7. according to claim 1,2,3 or 4 described processing methods, it is characterized in that: the equipment that described sedimentation clarifying treatment adopts is concentrator, depositing reservoir or mine tailing storehouse.
One kind can supporting processing output mud selective flocculation desliming ore-dressing technique, may further comprise the steps: earlier ore ore grinding to-200 orders are accounted for 85%～95%, carry out primary multistage flocculation desliming then; Sand setting after multistage flocculation desliming ore grinding to-500 orders again accounts for more than 90%, carries out secondary multistage flocculation desliming again, the mud after twice the multistage flocculation desliming is merged, and concentrate and adopt aforesaid right to require the processing method in 1～7 to handle.
9. selective flocculation desliming technology according to claim 8 is characterized in that: suspension content 〉=2% after the mud after the described multistage flocculation desliming merges.
10. according to Claim 8 or 9 described selective flocculation desliming technologies, it is characterized in that: described primary multistage flocculation desliming is the flocculation desliming more than two sections, and described secondary multistage flocculation desliming is the flocculation desliming more than two sections.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105016525A (en) * | 2015-07-09 | 2015-11-04 | 北京矿冶研究总院 | Copper-molybdenum ore beneficiation wastewater treatment method |
| CN105536979A (en) * | 2015-12-16 | 2016-05-04 | 陈均宁 | Method for extracting micro-fine-particle iron ore concentrate from tailings obtained after primary iron separation |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109248791B (en) * | 2017-12-20 | 2020-06-02 | 中国矿业大学(北京) | Compression sedimentation method for promoting accelerated sedimentation of iron ore tailings |
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| CN105536979A (en) * | 2015-12-16 | 2016-05-04 | 陈均宁 | Method for extracting micro-fine-particle iron ore concentrate from tailings obtained after primary iron separation |
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