CN102671753A - Dosing and size mixing method for ore dressing of high-carbonate and low-grade phosphorite - Google Patents
Dosing and size mixing method for ore dressing of high-carbonate and low-grade phosphorite Download PDFInfo
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Abstract
The invention relates to a dosing and size mixing method for the ore dressing of high-carbonate and low-grade phosphorite, in particular to a method for adding an agent in the ore dressing process of removing carbonate from the high-carbonate and low-grade phosphorite. The method comprises the following steps of: adding a phosphoric acid or phosphate inhibitor; adding a sulfuric acid regulator; and adding a collecting agent at the position which forms an angle of between 90 and 180 degrees with an inlet of ore pulp and the position 10 to 20 centimeters higher than an ore feed port in the rotating direction of the ore pulp in a stirring barrel while adding sulfuric acid into the stirring barrel. By the dosing and size mixing method, carbonate minerals in the phosphorite can be removed effectively; calcium and magnesium ions generated by reacting the carbonate and the sulfuric acid can be combined with fatty acid ions quickly, so that the generation of indissolvable calcium sulfate and magnesium sulfate is prevented effectively; and even if crystalline solids of the calcium sulfate and the magnesium sulfate are generated, the crystalline solids react with fatty acid due to more active points on the surfaces to prevent the crystalline solids of the calcium sulfate and the magnesium sulfate from depositing on the walls of equipment or pipelines, so that the condition of blockage of the ore dressing equipment and the pipelines due to the deposition of the crystalline solids of the calcium sulfate and the magnesium sulfate is relieved.
Description
Technical field
The present invention relates to the beneficiation method that a kind of carbonate-type phosphorite reverse flotation removes carbonate, particularly relate to the adding method that the low-grade phosphorite of high-carbon hydrochlorate type is deviate from a kind of medicament in the ore dressing process of carbonate.
Technical background
The carbonate-type phosphorite mainly adopts single reverse flotation to remove carbonate impurity, and ore dressing is sized mixing and adopted in the process sulfuric acid to adjust agent as pH usually, and phosphoric acid or phosphate are as phosphorus ore thing inhibitor, and fatty acid soaps is as the collecting agent of carbonate mineral.At present, the adding method of three kinds of medicaments is: add sulfuric acid earlier, fully the effect back adds phosphoric acid or phosphate inhibitor, adds collecting agent at last.This adding method thereof of sizing mixing is easy to generate the ore dressing adverse effect, particularly high-carbon hydrochlorate phosphorite ore dressing, and its influence factor is following:
1) carbonate mineral and sulfuric acid reaction, newly-generated calcium sulfate magnesium addition cover phosphorus ore thing surface easily, influence the effect of inhibitor;
2) the material granularity of carbonate mineral reaction generation is thinner, wraps up each other easily, is not easy to disperse, and is unfavorable for the effect of collecting agent;
3) behind carbonate and the sulfuric acid reaction, newly-generated indissoluble calcium sulfate magnesium has the adequate time crystallization deposition on appts wall and duct wall, causes after long-time line clogging, device processes ability low easily.
Summary of the invention
The objective of the invention is to, provide a kind of new carbonate-type phosphorite reverse flotation to remove the method that medicament adds in the carbonate impurity process.Adopt and at first add phosphoric acid or phosphate inhibitor; Add sulfuric acid adjustment agent then; The direction that ore pulp rotates in agitator when sulfuric acid adds agitator enters the mouth into the place at 90 ° of-180 ° of angles with ore pulp, and the place that exceeds feed port 10cm-20cm adds collecting agent.New adding method thereof can change the mechanism of various medicaments and ore, removes carbonate impurity effectively, can also overcome the adverse effect of traditional dosing method to ore dressing.
Technical scheme of the present invention is:
1) ore pulp is introduced in first tank diameter of sizing mixing, added phosphoric acid or phosphate in the porch along the agitator wall, phosphoric acid or phosphate inhibitor can at first act on ore, effectively suppress the phosphorus ore thing;
2) ore pulp through step 1) flows into second tank diameter bottom from the tank diameter bottom of sizing mixing; Add the concentrated sulfuric acid in its ore pulp porch, bottom, regulate slurry pH 3 ~ 4, the concentrated sulfuric acid and ore effect; Further dissociate carbonate mineral, and produce new surface-active point;
3) direction that ore pulp rotates in second tank diameter; Enter the mouth into 90 ° of-180 ° of angles with ore pulp; Exceed feed port 10cm-20cm place and lean on the tank diameter cell wall to add fatty acid soaps class collecting agent, through step 2) ore pulp under stirring action, rises and collecting agent reacts, the carbonate mineral that is left by sulfolysis combines with collecting agent; Form the fatty acid calcium and the fatty acid magnesium salt of indissoluble, and the absorption on the new surface-active point in the carbonate mineral surface that dissociates of aliphatic acid ion.
Compared with prior art, for the low-grade phosphorite ore dressing of high-carbon hydrochlorate type, the carbonate mineral of this technology in can the effective elimination phosphorite; The calcium that carbonate and sulfuric acid reaction produce, magnesium ion can be apace and the aliphatic acid ions bind, prevented the generation of indissoluble calcium sulfate, magnesium sulfate effectively; Even have calcium sulfate, magnesium sulfate crystalline solid to generate; Also can more be prone to and the aliphatic acid effect because of the newly-increased compared to prior art more surface-active point of its surface-active point; Prevent calcium sulfate, magnesium sulfate crystallization deposition to appts wall or duct wall, alleviate the situation that preparation equipment and pipeline stop up because of calcium sulfate magnesium crystallization deposition.
Description of drawings
Fig. 1 is a slip flow direction sketch map.
Fig. 2 is Fig. 1 E-E view.
Among the figure, A is first agitator ore pulp inlet; B is first agitator ore pulp outlet; C is second agitator ore pulp inlet; D is second agitator ore pulp outlet; 1-phosphoric acid or phosphate add point; 2-sulfuric acid adds point; 3-fatty acid soaps class collecting agent inlet.
The specific embodiment
Embodiment 1
Raw ore is the appositional pattern phosphorite, P
2O
5Content 14.65%, MgO content 11.82%.As shown in Figure 1, slip flows along the direction of A-B-C-D.Ore pulp directly gets into the flotation device machine from D and carries out flotation.
1) through broken, ore grinding, raw ore is ground to fineness is-0.075mm >=98%, phosphorus ore thing and carbonate mineral are dissociated each other, controlling the concentration of sizing mixing is 27～33%;
2) ore pulp is introduced in first tank diameter of sizing mixing, porch adding concentration is 35% industrial phosphoric acid in tank diameter, and addition is added according to the 2.0-2.5kg/t raw ore; Phosphoric acid can at first act on ore, effectively suppresses the phosphorus ore thing;
3) ore pulp through " 2) " flows into second tank diameter from the bottom; The industrial concentrated sulfuric acid in its ore pulp porch, bottom adding 95%; Addition is added according to the 16.0kg/t raw ore, regulates pH values of pulp 3 ~ 4, sulfuric acid and ore effect; Further dissociate carbonate mineral, and produce new surface-active point;
The direction of 4) rotating at second tank diameter ore pulp, enter the mouth into an angle of 90 degrees with ore pulp, the place that exceeds ore pulp inlet tube 10cm leans on wall adding fatty acid soaps class collecting agent; Addition is added according to the 2.5kg/t raw ore; Under stirring action, rises and collecting agent reacts through the ore pulp of " 3) "; The carbonate mineral that is left by sulfolysis combines rapidly with collecting agent; Form the fatty acid calcium and the fatty acid magnesium salt of indissoluble, and the aliphatic acid ion adsorbs on the new active site of the carbonic acid mineral surfaces that dissociates;
5) through the process of sizing mixing of " 4) ", ore pulp gets into flotation cell and separates sorting, and floatation process adopts anti-floating one roughing primary cleaning flow process, and flotation froth is a mine tailing, and product is the phosphorus concentrate in the groove.Roughly select concentrate and get into before the selected operation, between its flotation cell, add sulfuric acid 2.0kg/t raw ore and enol class foaming agent 0.2kg/t raw ore in the case.
The phosphorus concentrate index that obtains: productive rate 32.65%, P
2O
5Content 30.59%, MgO content 0.85%, P
2O
5The rate of recovery 68.66%, MgO removal efficiency 97.49%.
Raw ore is the appositional pattern phosphorite, P
2O
5Content 23.45%, MgO content 5.23%.
1) through broken, ore grinding, raw ore is ground to fineness is-0.075mm >=94%, phosphorus ore thing and carbonate mineral are dissociated each other, controlling the concentration of sizing mixing is 27～33%;
2) ore pulp is introduced in first tank diameter of sizing mixing, porch adding concentration is 35% industrial phosphoric acid in tank diameter, and addition is added according to the 2.5kg/t raw ore; Phosphoric acid can at first act on ore, effectively suppresses the phosphorus ore thing;
3) ore pulp through " 2) " flows into second tank diameter from the bottom; The industrial concentrated sulfuric acid in its ore pulp porch, bottom adding 95%; Addition is added according to the 12.0kg/t raw ore, regulates pH values of pulp 3 ~ 4, sulfuric acid and ore effect; Further dissociate carbonate mineral, and produce new surface-active point;
The direction of 4) rotating at second tank diameter ore pulp, be 180 ° of angles with the ore pulp inlet, the place that exceeds ore pulp inlet tube 20cm leans on wall to add fatty acid soaps class collecting agent; Addition is added according to the 2.25kg/t raw ore; Under stirring action, rises and collecting agent reacts through the ore pulp of " 3) "; The carbonate mineral that is left by sulfolysis combines rapidly with collecting agent; Form the fatty acid calcium and the fatty acid magnesium salt of indissoluble, and the aliphatic acid ion adsorbs on the new active site of the carbonic acid mineral surfaces that dissociates;
5) through the process of sizing mixing of " 4) ", ore pulp gets into flotation cell and separates sorting, and floatation process adopts anti-floating one roughing primary cleaning flow process, and flotation froth is a mine tailing, and product is the phosphorus concentrate in the groove.Roughly select concentrate and get into before the selected operation, between its flotation cell, add in the case and roughly select the same fatty acid soaps class collecting agent 0.5kg/t raw ore.
The phosphorus concentrate index that obtains: productive rate 63.77%, P
2O
5Content 30.67%, MgO content 0.69%, P
2O
5The rate of recovery 82.39%, MgO removal efficiency 91.06%.
Embodiment 3
Raw ore is the appositional pattern phosphorite, P
2O
5Content 20.01%, MgO content 7.26%.
1) through broken, ore grinding, raw ore is ground to fineness is-0.075mm >=98%, phosphorus ore thing and carbonate mineral are dissociated each other, controlling the concentration of sizing mixing is 27～33%;
2) ore pulp is introduced in first tank diameter of sizing mixing, porch adding concentration is 35% industrial phosphoric acid in tank diameter, and addition is added according to the 2.5kg/t raw ore; Phosphoric acid can at first act on ore, effectively suppresses the phosphorus ore thing;
3) ore pulp through " 2) " flows into second tank diameter from the bottom; The industrial concentrated sulfuric acid in its ore pulp porch, bottom adding 95%; Addition is added according to the 14.0kg/t raw ore, regulates pH values of pulp 3 ~ 4, sulfuric acid and ore effect; Further dissociate carbonate mineral, and produce new surface-active point;
4) place that enters the mouth at an angle of 90, exceeds ore pulp inlet tube 10cm in the direction of second tank diameter ore pulp rotation, with ore pulp is by wall adding fatty acid soaps class collecting agent; Addition is added according to the 2.5kg/t raw ore; Under stirring action, rises and collecting agent reacts through the ore pulp of " 3) "; The carbonate mineral that is left by sulfolysis combines rapidly with collecting agent; Form the fatty acid calcium and the fatty acid magnesium salt of indissoluble, and the aliphatic acid ion adsorbs on the new active site of the carbonic acid mineral surfaces that dissociates;
5) through the process of sizing mixing of " 4) ", ore pulp gets into flotation cell and separates sorting, and floatation process adopts anti-floating one roughing primary cleaning flow process, and flotation froth is a mine tailing, and product is the phosphorus concentrate in the groove.Roughly select concentrate and get into before the selected operation, between its flotation cell, add sulfuric acid 4.0kg/t raw ore and enol class foaming agent 0.4kg/t raw ore in the case.
The phosphorus concentrate index that obtains: productive rate 56.73%, P
2O
5Content 33.53%, MgO content 0.78%, P
2O
5The rate of recovery 84.34%, MgO removal efficiency 93.90%.
Embodiment 4
Raw ore is the appositional pattern phosphorite, P
2O
5Content 14.65-23.45%, MgO content 5.23-11.82%.
1) through broken, ore grinding, raw ore is ground to fineness is-0.075mm >=98%, phosphorus ore thing and carbonate mineral are dissociated each other, controlling the concentration of sizing mixing is 27～33%;
2) ore pulp is introduced in first tank diameter of sizing mixing, porch adding concentration is 35% industrial phosphoric acid in tank diameter, and addition is added according to the 2.0-2.5kg/t raw ore; Phosphoric acid can at first act on ore, effectively suppresses the phosphorus ore thing;
3) ore pulp through " 2) " flows into second tank diameter from the bottom; The industrial concentrated sulfuric acid in its ore pulp porch, bottom adding 95%; Addition is added according to the 12-16.0kg/t raw ore, regulates pH values of pulp 3 ~ 4, sulfuric acid and ore effect; Further dissociate carbonate mineral, and produce new surface-active point;
The direction of 4) rotating at second tank diameter ore pulp, enter the mouth into 90-180 degree angle with ore pulp, the place that exceeds ore pulp inlet tube 10cm-20cm leans on wall adding fatty acid soaps class collecting agent; Addition is added according to the 2.25-2.5kg/t raw ore; Ore pulp through step 3) rises under stirring action and the collecting agent reaction; The carbonate mineral that is left by sulfolysis combines rapidly with collecting agent; Form the fatty acid calcium and the fatty acid magnesium salt of indissoluble, and the aliphatic acid ion adsorbs on the new active site of the carbonic acid mineral surfaces that dissociates;
5) through the process of sizing mixing of step 4), ore pulp gets into flotation cell and separates sorting, and floatation process adopts anti-floating one roughing primary cleaning flow process, and flotation froth is a mine tailing, and product is the phosphorus concentrate in the groove.
Add sulfuric acid 2.0-4.0kg/t raw ore and enol class foaming agent 0.2-0.4kg/t raw ore between the said flotation cell of step 5) in the case.
Add in the case between the said flotation cell of step 5) and roughly select the same fatty acid soaps class collecting agent 0.5kg/t raw ore.
Claims (4)
1. the low-grade phosphorite ore dressing of high-carbon hydrochlorate dosing mixing method, raw ore is the appositional pattern phosphorite, P
2O
5Content 14.65-23.45%, MgO content 5.23-11.82% is characterized in that, the steps include:
1) ore pulp is introduced in first tank diameter of sizing mixing, added phosphoric acid or phosphate in the porch along the agitator wall, phosphoric acid or phosphate inhibitor and ore effect suppress the phosphorus ore thing;
2) ore pulp through step 1) flows into second tank diameter bottom from the tank diameter bottom of sizing mixing; Add the concentrated sulfuric acid in its ore pulp porch, bottom, regulate slurry pH 3 ~ 4, the concentrated sulfuric acid and ore effect; Further dissociate carbonate mineral, and produce new surface-active point;
3) direction that ore pulp rotates in second tank diameter; Enter the mouth into 90 ° of-180 ° of angles with ore pulp; Exceed feed port 10cm-20cm place and lean on the tank diameter cell wall to add fatty acid soaps class collecting agent, through step 2) ore pulp under stirring action, rises and collecting agent reacts, the carbonate mineral that is left by sulfolysis combines with collecting agent; Form the fatty acid calcium and the fatty acid magnesium salt of indissoluble, and the absorption on the new surface-active point in the carbonate mineral surface that dissociates of aliphatic acid ion.
2. the low-grade phosphorite ore dressing of a kind of high-carbon hydrochlorate according to claim 1 dosing mixing method is characterized in that,
1) through broken, ore grinding; Raw ore is ground to fineness is-0.075mm >=98%; Phosphorus ore thing and carbonate mineral are dissociated each other, and controlling the concentration of sizing mixing is 27～33%, and ore pulp is introduced in first tank diameter of sizing mixing; Porch adding concentration is 35% industrial phosphoric acid in tank diameter, and addition is added according to the 2.0-2.5kg/t raw ore; Phosphoric acid and ore effect suppress the phosphorus ore thing;
2) ore pulp through step 1) flows into second tank diameter bottom from the tank diameter bottom of sizing mixing; The industrial concentrated sulfuric acid in its ore pulp porch, bottom adding 95%; Addition is added according to the 12-16.0kg/t raw ore, regulates pH values of pulp 3 ~ 4, the concentrated sulfuric acid and ore effect; Further dissociate carbonate mineral, and produce new surface-active point;
The direction of 3) rotating at second tank diameter ore pulp, enter the mouth into 90-180 degree angle with ore pulp, the place that exceeds ore pulp inlet tube 10cm-20cm leans on wall adding fatty acid soaps class collecting agent; Addition is added according to the 2.25-2.5kg/t raw ore; Ore pulp through step 3) rises under stirring action and the collecting agent reaction; The carbonate mineral that is left by sulfolysis combines rapidly with collecting agent; Form the fatty acid calcium and the fatty acid magnesium salt of indissoluble, and the aliphatic acid ion adsorbs on the new active site of the carbonic acid mineral surfaces that dissociates;
4) through the process of sizing mixing of step 3), ore pulp gets into flotation cell and separates sorting, and floatation process adopts anti-floating one roughing primary cleaning flow process, and flotation froth is a mine tailing, and product is the phosphorus concentrate in the groove.
3. the low-grade phosphorite ore dressing of a kind of high-carbon hydrochlorate according to claim 1 dosing mixing method is characterized in that, adds sulfuric acid 2.0-4.0kg/t raw ore and enol class foaming agent 0.2-0.4kg/t raw ore between the said flotation cell of step 4) in the case.
4. the low-grade phosphorite ore dressing of a kind of high-carbon hydrochlorate according to claim 1 dosing mixing method is characterized in that, adds in the case between the said flotation cell of step 4) to roughly select the same fatty acid soaps class collecting agent 0.5kg/t raw ore.
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Cited By (5)
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| CN104759339A (en) * | 2015-04-07 | 2015-07-08 | 广西北流市智宇陶瓷自动化设备有限公司 | Device for adding oxidation corrosion medicine in ore pulp agitating treatment |
| CN107055494A (en) * | 2017-04-13 | 2017-08-18 | 云南胜威化工有限公司 | The method that a kind of spent acid in utilization sulfuric acid method titanium pigment production technology selects phosphorus ore |
| CN108455543A (en) * | 2018-02-07 | 2018-08-28 | 四川绵竹市盘龙矿物质有限责任公司 | A kind of the defoaming charging process and its device of phosphoric acid by wet process extraction reaction |
| CN109908825A (en) * | 2019-04-23 | 2019-06-21 | 陕西科技大学 | A kind of flowsheet of slurry agitation device and its stirring means |
| CN110293000A (en) * | 2019-06-21 | 2019-10-01 | 铜陵有色金属集团股份有限公司 | A kind of sulfur method and desulphurization system of iron ore concentrate |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104759339A (en) * | 2015-04-07 | 2015-07-08 | 广西北流市智宇陶瓷自动化设备有限公司 | Device for adding oxidation corrosion medicine in ore pulp agitating treatment |
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| CN108455543A (en) * | 2018-02-07 | 2018-08-28 | 四川绵竹市盘龙矿物质有限责任公司 | A kind of the defoaming charging process and its device of phosphoric acid by wet process extraction reaction |
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| CN109908825A (en) * | 2019-04-23 | 2019-06-21 | 陕西科技大学 | A kind of flowsheet of slurry agitation device and its stirring means |
| CN110293000A (en) * | 2019-06-21 | 2019-10-01 | 铜陵有色金属集团股份有限公司 | A kind of sulfur method and desulphurization system of iron ore concentrate |
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