CN111167610A - Reverse-direct flotation method for silico-calcium collophanite - Google Patents
Reverse-direct flotation method for silico-calcium collophanite Download PDFInfo
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- CN111167610A CN111167610A CN201811330801.9A CN201811330801A CN111167610A CN 111167610 A CN111167610 A CN 111167610A CN 201811330801 A CN201811330801 A CN 201811330801A CN 111167610 A CN111167610 A CN 111167610A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/002—Inorganic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/005—Dispersants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
Abstract
The reverse-direct flotation method for silico-calcium collophanite includes such steps as grinding raw ore, reverse-floatation for removing magnesium, direct-floatation for removing silicon, direct-floatation for returning the return water to reverse-floatation pool, and reverse-floatation for removing silicon. The reverse flotation method of the silicon-calcium collophanite can save water, can recycle all waste water and has low treatment cost. The invention adopts a flotation process of firstly reverse flotation and then forward flotation, the required water is less, and the reverse flotation return water is recycled for reverse flotation after entering the reverse flotation return water tank. The method can realize that the dosage of the medicament is less, the ion content of the ore pulp in the direct flotation operation is low, and the water consumption is less on the premise that the indexes of the yield, the grade and the recovery rate of the concentrate are similar to those of the prior art.
Description
Technical Field
The invention belongs to the technical field of mineral processing, and particularly relates to a reverse flotation backwater utilization process for stage grinding of silicon-calcium collophanite.
Background art:
in the industrial production of collophanite, how to effectively realize the practical application of backwater is related to the level of the new water consumption of a dressing plant and the quality of the technical indexes of ore dressing, and the problems of capacity pressure of a tailing pond and environmental protection are related. The direct-reverse flotation process of collophanite mainly aims at silico-calcium collophanite, the direct flotation process removes most silicate gangue minerals by flotation under the condition of alkaline pH, and the reverse flotation process removes most dolomite and calcite under the condition of weak acid pH. In the actual production of the direct and reverse flotation plant, the wastewater of the reverse flotation concentrate is found to have no adverse effect on the reverse flotation process, and on the contrary, the usage amount of mixed acid can be reduced; however, if the waste water of the reverse flotation concentrate and the waste water of the tailing pond are directly returned to the forward flotation process, the phenomena of unstable forward flotation process, deteriorated beneficiation indexes, increased beneficiation reagent consumption and the like can be caused. The overflow of the positive flotation tailing thickener is often muddy, and the part of water returns to the positive flotation process, so that the use amount of a collecting agent is increased, but the influence on the mineral separation index is small.
The conventional backwater system of the direct-reverse flotation process generally adopts that one part of wastewater of reverse flotation concentrate is returned to the reverse flotation process, the other part of wastewater and the wastewater of the underflow of a reverse flotation tailing thickener are directly conveyed to a tailing pond, the overflow of the concentration of the direct flotation tailing is directly returned to the direct flotation process, but the backwater of the part cannot meet the requirement of the direct flotation process, a certain amount of new water is required to be supplemented or the backwater returned by the tailing pond is adopted, and if the added new water is adopted as the supplemented water of the direct flotation, the defects that the usage amount of the new water is higher in the actual production and the pressure of the tailing pond is higher exist. At present, backwater of a tailing pond is conventionally adopted as supplementary water of a direct flotation process, and excessive Ca carried in the backwater of reverse flotation2+、PO4 3-、SO4 2-The direct flotation process is unstable due to the fact that the difficulty of land approval of the tailing pond in the current country is increasing and the requirement of the process on controlling the pH value of the return water is strict.
The invention content is as follows:
the invention aims to solve the technical problem of providing a novel reverse flotation method of silico-calcium collophanite, aiming at the defects of the prior art, the method has the advantages of high recycling rate of beneficiation wastewater, reduction of consumption of new water, avoidance of the influence of the wastewater on the environment and reduction of beneficiation cost to a certain extent on the premise of not influencing the production technical indexes.
The technical problem to be solved by the present invention is achieved by the following technical means. The invention relates to a reverse flotation method of silicon-calcium collophanite, which is characterized in that: after grinding raw ore, adopting a flotation process of firstly reverse flotation to remove magnesium and then direct flotation to remove silicon; and returning the reverse flotation backwater into a reverse flotation backwater pool for reverse flotation and demagging, returning the forward flotation backwater into a forward flotation backwater pool for forward flotation and desilicification, and feeding the surplus forward flotation backwater into the reverse flotation backwater pool for reverse flotation.
The reverse flotation method of the silico-calcic collophanite further preferably adopts the technical scheme that: the method adopts stage grinding stage sorting, the crushed raw ore is firstly fed into a first stage grinding operation, after carbonate gangue ore is firstly sorted out through reverse flotation demagging operation, the carbonate gangue ore is fed into a second stage grinding operation, and the ground ore pulp is fed into a positive flotation desilication operation.
The reverse flotation method of the silico-calcic collophanite further preferably adopts the technical scheme that: the grinding fineness of the primary grinding is 50.00-75.00% of-200 meshes; the grinding fineness of the secondary grinding ore is 75-95% of-200 meshes.
The reverse flotation method of the silico-calcic collophanite further preferably adopts the technical scheme that: the method comprises the following specific steps:
(1) feeding the crushed raw ore into a primary grinding operation, feeding the ore pulp into a reverse flotation demagging operation, feeding the product in a flotation machine tank into a reverse flotation rough concentrate dewatering operation, and feeding the filtrate into a reverse flotation return water tank; feeding the foam product into a tailing pond or a tailing storage yard through dehydration operation, and feeding the filtrate into a reverse flotation return water tank;
(2) the dewatered reverse flotation rough concentrate filter cake is subjected to size mixing and then fed into a second-stage ore grinding operation, the ground product is fed into a positive flotation desilication operation, the foam product is fed into a positive flotation rough concentrate dewatering operation, and the filtrate is fed into a positive flotation return water tank; the products in the flotation tank are fed into a tailing pond or a tailing storage yard through dehydration operation, and the filtered filtrate is fed into a positive flotation return water tank;
(3) and returning the backwater of the reverse flotation backwater tank to the reverse flotation tank for use, returning the backwater of the forward flotation backwater tank to the forward flotation tank for use, and feeding the surplus backwater of the forward flotation tank to the reverse flotation backwater tank.
The reverse flotation method of the silico-calcic collophanite further preferably adopts the technical scheme that: before the dehydration operation of the products in the tank of the reverse flotation operation, the desliming operation can be considered.
The reverse flotation method of the silico-calcic collophanite further preferably adopts the technical scheme that: the dewatering operation of products in a reverse flotation tank comprises thickening operation and filtering operation, the products in the reverse flotation tank are firstly fed into a reverse flotation rough concentrate thickener, the foam products of the reverse flotation are fed into a tailing thickener, the underflow of the rough concentrate thickener is selectively fed into desliming operation or directly fed into filtering operation according to the properties of ores, the overflow of the desliming operation is fed into the tailing thickener for operation, the settled sand of the desliming operation is fed into the concentrate filtering operation, the filtrate is fed into a reverse flotation return water tank, and the filter cake is subjected to size mixing and then fed into secondary grinding operation.
The reverse flotation method of the silico-calcic collophanite further preferably adopts the technical scheme that: adding a flocculating agent into a reverse flotation tailing thickener, a tailing thickener and a rough concentrate thickener, adding a dispersing agent into the rough concentrate thickener, and feeding overflow of the thickener and filtered overflow into a reverse flotation water return pool; the dispersant is one or more selected from water glass, sodium hexametaphosphate, BS, OP-10 and a super dispersant. The additive of the dispersing agent is preferably 1-2 kg/ton of coarse concentrate.
The reverse flotation method of the silico-calcic collophanite further preferably adopts the technical scheme that: the positive flotation concentrate dehydration operation comprises thickening operation or filtering operation; wherein, flocculating agents are added into the positive flotation tailing thickener and the positive flotation concentrate thickener, and the positive flotation concentrate thickener overflows, the positive flotation tailing thickener overflows and filter filtrate is fed into a positive flotation return water tank.
The reverse flotation method of the silico-calcic collophanite further preferably adopts the technical scheme that: and the waste water in the reverse flotation return tank is clarified and then is conveyed to each water using point of reverse flotation ore grinding and reverse flotation operation by a pump, the waste water in the forward flotation return tank is clarified and then is conveyed to each water using point of forward flotation ore grinding and flotation operation by a pump, and the residual waste water in the forward flotation return tank is conveyed to the reverse flotation return tank for reverse flotation operation by a pump.
The reverse flotation method of the silico-calcic collophanite further preferably adopts the technical scheme that: adding a dispersant into a product in a tank obtained by reverse flotation magnesium removal operation; the dispersant is one or more selected from water glass, sodium hexametaphosphate, BS, OP-10 and a super dispersant. The additive of the dispersant is preferably 1-2 kg/ton of product in the tank.
The reverse flotation concentrate tailing wastewater contains a large amount of PO4 3-And SO4 2-，PO4 3-Too high a content will have a strong inhibitory effect on the flotation of phosphorus minerals, whereas SO4 2-If the content is too high, the inhibition effect of the water glass on the siliceous gangue can be weakened, and in addition, the reverse flotation return water contains Ca2+The silicate gangue minerals can be activated and combined with the positive flotation fatty acid collecting agent, so that the activity of the collecting agent is reduced, and the wastewater can be returned to the positive flotation for use only after the concentration of the silicate gangue minerals is reduced to a certain degree through treatment. And the treatment of the reverse flotation return water requires high treatment cost, and the tailing stock is in danger of leakage.
The invention adopts the modes of reverse flotation rough concentrate thickening and desliming operation, and simultaneously adds the dispersing agent in the thickening operation, separates the calcium sulfate generated in the reverse flotation operation from the reverse flotation rough concentrate as much as possible, and enters the overflow of the desliming operation through the desliming operation, and filters the reverse flotation rough concentrate into a filter cake through the filtering operation, so that the return water of the reverse flotation is not brought into the forward flotation as much as possible, and the independent return water of the reverse flotation and the forward flotation is basically realized.
Compared with the prior art, the technical scheme of the invention has the following beneficial technical effects:
(1) the reverse flotation method of the silicon-calcium collophanite can save water, can recycle all waste water and has low treatment cost. The reverse flotation process is simple, the required water is less, and the reverse flotation return water is recycled for reverse flotation after entering the reverse flotation return water tank. And the positive flotation return water is recycled for positive flotation after entering a positive flotation return water tank, and redundant positive flotation return water is fed into a reverse flotation return water tank for reverse flotation.
(2) The method further preferably adopts stage grinding stage separation, the grinding fineness is preferably selected, the water consumption of the whole flotation process can be reduced, the flotation agent is saved, carbonate gangue minerals in the first stage grinding are removed, and the grinding cost is reduced. The whole process has less secondary slime, low dehydration cost of fine tailings and lower hardness of carbonate gangue minerals.
(3) The invention has stable process flow and higher solubility of carbonate gangue minerals. The direct flotation process is firstly carried out in the direct and reverse flotation, and because the ore is ground to be fine, Mg in ore pulp is caused2+And Ca2+The concentration is very high, and along with the use of the return water of the forward flotation, Mg in the ore pulp2+And Ca2+The concentration is higher and higher, which can lead to the increase of the dosage of the chemical agent in the positive flotation process and the instability of the process flow. The invention removes carbonate gangue minerals in the ores firstly through the first stage of ore grinding flotation operation, thereby reducing Mg entering the direct flotation operation to the maximum extent2+And Ca2+And (4) concentration. And further, adding a dispersing agent into the reverse flotation rough concentrate thickener to remove calcium sulfate carried in the reverse flotation rough concentrate into overflow of the reverse flotation rough concentrate thickener.
(4) The reverse flotation return water of the invention comes from the overflow of the reverse flotation concentrate tailing thickener and the filtrate of the concentrate filtering operation, does not need to be treated, and directly returns to the reverse flotation operation. The return water of the forward flotation is completely from the overflow of the concentrate tailing thickener of the forward flotation and the filtrate of the concentrate tailing filtering operation, and is directly returned to the forward flotation operation without treatment, and the return water of the reverse flotation is not returned to the return water operation of the forward flotation. By adopting the water return mode, excessive Ca carried in reverse flotation water return is effectively avoided2+、PO4 3-、SO4 2-Influence on direct flotation of phosphorite. The invention has the advantages of simple process flow of backwater treatment, low investment cost, low operation effect and cost and the like, and is beneficial to the stable operation of the reverse-positive flotation process in the actual production.
(5) The method of the invention can realize that the dosage of the medicament is less, the ion content of the ore pulp in the direct flotation operation is low, and the water consumption is less on the premise that the indexes of the yield, the grade and the recovery rate of the concentrate are similar to those of the prior art. Therefore, the invention also solves the problem that the reverse and forward flotation backwater can not be used alternately in the flotation process of the silico-calcium collophanite, and the invention has very important practical significance for industrialization of the reverse and forward flotation process flow of the silico-calcium collophanite in China.
Detailed Description
The following further describes particular embodiments of the present invention to facilitate further understanding of the present invention by those skilled in the art, and does not constitute a limitation to the right thereof.
Example 1, a reverse-forward flotation method for silico-calcic collophanite, after grinding raw ore, adopting a flotation process of reverse flotation demagging first and then forward flotation desiliconization; and returning the reverse flotation backwater into a reverse flotation backwater pool for reverse flotation and demagging, returning the forward flotation backwater into a forward flotation backwater pool for forward flotation and desilicification, and feeding the surplus forward flotation backwater into the reverse flotation backwater pool for reverse flotation.
The method adopts stage grinding stage sorting, the crushed raw ore is firstly fed into a first-stage grinding operation, after carbonate gangue ore is sorted out through reverse flotation and magnesium removal operation, the carbonate gangue ore is fed into a second-stage grinding operation, and the ground ore pulp is fed into a positive flotation and desiliconization operation. The grinding fineness of the primary grinding is 50.00 percent of-200 meshes; the grinding fineness of the secondary grinding is-200 meshes and accounts for 75 percent.
Embodiment 2, a reverse flotation method for silico-calcium collophanite, which comprises the following steps:
(1) feeding the crushed raw ore into a first-stage ore grinding operation, wherein the grinding fineness of the first-stage ore grinding is 75.00 percent of-200 meshes; feeding ore pulp into a reverse flotation demagging operation, feeding products in a flotation machine tank into a reverse flotation rough concentrate dehydration operation, and feeding filtrate into a reverse flotation return water tank; feeding the foam product into a tailing pond or a tailing storage yard through dehydration operation, and feeding the filtrate into a reverse flotation return water tank;
(2) the dewatered coarse flotation concentrate filter cake is subjected to size mixing and then fed into a second-stage grinding operation, the grinding fineness of the second-stage grinding operation is 100 percent of that of-200 meshes, the ground product is fed into a forward flotation desiliconization operation, the foam product is fed into a forward flotation coarse concentrate dewatering operation, and the filtrate is fed into a forward flotation return water tank; the products in the flotation tank are fed into a tailing pond or a tailing storage yard through dehydration operation, and the filtered filtrate is fed into a positive flotation return water tank;
(3) and returning the backwater of the reverse flotation backwater tank to the reverse flotation tank for use, returning the backwater of the forward flotation backwater tank to the forward flotation tank for use, and feeding the surplus backwater of the forward flotation tank to the reverse flotation backwater tank.
The desliming operation is carried out before the dehydration operation of the product in the tank of the reverse flotation operation.
The dewatering operation of the product in the reverse flotation tank comprises thickening operation and filtering operation, the product in the reverse flotation tank is fed into a reverse flotation rough concentrate thickener firstly, the underflow of the thickener is selectively fed into desliming operation or directly fed into filtering operation according to the properties of ores, the overflow of the desliming operation is fed into a tail mud thickener for operation, the settled sand of the desliming operation is fed into concentrate filtering operation, the filtrate is fed into a reverse flotation return tank, and the filter cake is fed into second-stage ore grinding operation after size mixing.
Adding a flocculating agent into a reverse flotation tailing thickener, a tailing thickener and a rough concentrate thickener, adding a dispersing agent into the rough concentrate thickener, and feeding overflow of the thickener and filtered overflow into a reverse flotation water return pool; the dispersant is selected from water glass, sodium hexametaphosphate, BS, OP-10 or super dispersant, and the addition amount of the dispersant is 1-2 kg/ton of rough concentrate.
The positive flotation concentrate dehydration operation comprises thickening operation or filtering operation; wherein, flocculating agents are added into the positive flotation tailing thickener and the positive flotation concentrate thickener, and the positive flotation concentrate thickener overflows, the positive flotation tailing thickener overflows and filter filtrate is fed into a positive flotation return water tank.
And the waste water in the reverse flotation return tank is clarified and then is conveyed to each water using point of reverse flotation ore grinding and reverse flotation operation by a pump, the waste water in the forward flotation return tank is clarified and then is conveyed to each water using point of forward flotation ore grinding and flotation operation by a pump, and the residual waste water in the forward flotation return tank is conveyed to the reverse flotation return tank for reverse flotation operation by a pump.
Embodiment 3, a reverse flotation method for silico-calcium collophanite comprises the following specific steps:
(1) feeding the crushed raw ore into a first-stage ore grinding operation, wherein the grinding fineness of the first-stage ore grinding is-200 meshes and 65.00 percent; feeding ore pulp into a reverse flotation demagging operation, feeding products in a flotation machine tank into a reverse flotation rough concentrate dehydration operation, and feeding filtrate into a reverse flotation return water tank; feeding the foam product into a tailing pond or a tailing storage yard through dehydration operation, and feeding the filtrate into a reverse flotation return water tank;
(2) the dewatered coarse flotation concentrate filter cake is subjected to size mixing and then fed into a second-stage grinding operation, the grinding fineness of the second-stage grinding operation is 90 percent of that of minus 200 meshes, the ground product is fed into a forward flotation desiliconization operation, the foam product is fed into a forward flotation coarse concentrate dewatering operation, and the filtrate is fed into a forward flotation return water tank; the products in the flotation tank are fed into a tailing pond or a tailing storage yard through dehydration operation, and the filtered filtrate is fed into a positive flotation return water tank;
(3) and returning the backwater of the reverse flotation backwater tank to the reverse flotation tank for use, returning the backwater of the forward flotation backwater tank to the forward flotation tank for use, and feeding the surplus backwater of the forward flotation tank to the reverse flotation backwater tank.
Adding a dispersant into a product in a tank obtained by reverse flotation magnesium removal operation; the dispersant is one or two of water glass, sodium hexametaphosphate, BS, OP-10 or super dispersant, and the addition amount of the dispersant is 1.5 kg/ton of the product in the tank.
Embodiment 4, a silico-calcic collophanite reverse-positive flotation method experiment one, which comprises the following specific steps:
(1) crushing raw ore, feeding into a first-stage ore grinding and grading operation, wherein the ore grinding fineness realizes that useful minerals and carbonate gangue minerals are subjected to monomer dissociation, the ore grinding fineness is-200 meshes and is 60.0%, ore pulp is fed into a reverse flotation and magnesium removal operation, in a magnesium removal reverse flotation system, an inhibitor is mixed acid of sulfuric acid and phosphoric acid, the using amount of the mixed acid is 6.0kg/t of raw ore, and a collecting agent is fatty acid soap organic matters, and the using amount of the collecting agent is 0.6kg/t of raw ore. After flotation is finished, products in a flotation machine tank are fed into reverse flotation rough concentrate concentration operation, 2.0kg/t of raw ore is added into the concentration operation, underflow of the concentration machine is fed into desliming operation, overflow of the desliming operation is fed into tail mud concentration operation, settled sand of the desliming operation is fed into concentrate filtering operation, filtrate is fed into a reverse flotation water return tank, and filter cakes are fed into second-stage ore grinding operation after size mixing. Adding or not adding a flocculating agent into a reverse flotation tailing thickener, a tailing thickener and a reverse flotation rough concentrate thickener, feeding overflow and filtered filtrate of the thickener into a reverse flotation water returning pool, feeding foam products into tailing concentration operation, feeding underflow of the thickener into a tailing pool, and feeding overflow of the thickener into the reverse flotation water returning pool;
(2) the dewatered reverse flotation rough concentrate is subjected to size mixing and then fed into a second-stage ore grinding operation, the ground product is fed into a positive flotation desilicication operation, the ore grinding fineness is-200 meshes and accounts for 85.0 percent, in a desiliconization direct flotation system, sodium carbonate is selected as a pH regulator, the dosage is 2.5kg/t of raw ore, water glass is selected as an inhibitor of silicate minerals, the dosage is 4.5kg/t of raw ore, a fatty acid soap organic matter is selected as a collecting agent, the dosage is 1.2kg/t of raw ore, a foam product of a flotation machine is fed into a direct flotation rough concentrate concentration operation, the underflow of the concentration operation is fed into a filtering operation, the overflow of a thickener and filtering filtrate are fed into a direct flotation water returning pool, a product in the flotation tank is fed into a tailing concentration operation, the underflow of the concentration operation is fed into a tailing pool, the overflow of the thickener is fed into the direct flotation water returning pool, and the dehydration operation of the direct flotation concentrate comprises the concentration operation or the filtering operation. Wherein, flocculating agents are added into the positive flotation tailing thickener and the positive flotation concentrate thickener, and the positive flotation concentrate thickener overflows, the positive flotation tailing thickener overflows and filter filtrate is fed into a positive flotation return water tank.
(3) And the waste water in the reverse flotation return pool is clarified and then is conveyed to each water utilization point of the reverse flotation ore grinding and flotation operation by a pump, the waste water in the forward flotation return pool is clarified and then is conveyed to each water utilization point of the forward flotation ore grinding and flotation operation by a pump, and the residual waste water in the forward flotation return pool is conveyed to the reverse flotation return pool by a pump for use in the reverse flotation operation.
The reverse-positive flotation process of the first experiment and the reverse-positive flotation process of the prior art and comparative data are as follows:
on the premise of similar indexes of yield, grade and recovery rate of the concentrate, the dosage of the reagents of the two processes, the ion content of ore pulp in the direct flotation operation and the water consumption are compared.
The results show that: on the premise of similar ore concentrate yield and recovery rate indexes, compared with the forward and reverse flotation process in the prior art, the reverse and forward flotation separate backwater process has the advantages that the flotation agent dosage and Ca influencing the flotation effect in ore pulp in the forward flotation operation2+、Mg2+、PO4 3-、SO4 2-The ion content and the total water consumption and the clean water consumption have obvious advantages.
Example 5, a silico-calcic collophanite reverse-positive flotation method experiment two, which comprises the following specific steps:
(1) crushing raw ore, feeding into a first-stage ore grinding and grading operation, wherein the ore grinding fineness realizes that useful minerals and carbonate gangue minerals are subjected to monomer dissociation, the ore grinding fineness is 58.0 percent with minus 200 meshes, ore pulp is fed into a reverse flotation and magnesium removal operation, in a magnesium removal reverse flotation system, an inhibitor is sulfuric acid, the using amount of the sulfuric acid is 10kg/t of raw ore, and a collecting agent is fatty acid soap organic matters, and the using amount of the collecting agent is 0.5kg/t of raw ore. After flotation is finished, 0.5kg/t of sodium tripolyphosphate is added into a product in a flotation machine tank, then reverse flotation rough concentrate concentration operation is carried out, underflow of a thickener is carried out, overflow of the desliming operation is carried out, tail mud concentration operation is carried out, sand setting of the desliming operation is carried out concentrate filtration operation, filtrate is fed into a reverse flotation water return tank, and filter cakes are subjected to size mixing and then fed into second-stage ore grinding operation. Adding or not adding a flocculating agent into a reverse flotation tailing thickener, a tailing thickener and a reverse flotation rough concentrate thickener, feeding overflow of the thickener and filtered filtrate into a reverse flotation water returning pool, feeding foam products into tailing concentration operation, feeding overflow of the thickener into the reverse flotation water returning pool, feeding underflow of the thickener into tailing filter pressing operation, performing dry-stacking treatment on filtered tailings, and feeding overflow of the thickener and filter press filtrate into the reverse flotation water returning pool;
(2) the dewatered reverse flotation rough concentrate is subjected to size mixing and then fed into a second-stage grinding operation, the ground product is fed into a positive flotation desilication operation, the grinding fineness is 80.0 percent of minus 200 meshes, in a desilication positive flotation system, sodium carbonate is selected as a pH regulator, the consumption is 3.0kg/t of raw ore, water glass is selected as an inhibitor of silicate minerals, the consumption is 2.0kg/t of raw ore, a collecting agent is selected from fatty acid soap organic matters, the consumption is 1.0kg/t of raw ore, foam products of a flotation machine are fed into a filter pressing operation, the filtered concentrate is the final concentrate, filtered filtrate is fed into a positive flotation return water tank, products in the flotation tank are fed into tailings filter pressing operation, the filtered tailings are subjected to dry stacking treatment, filtrate in the filter pressing machine is fed into the positive flotation return water tank, the positive flotation concentrate dewatering operation comprises thickening operation or filtering operation, a positive flotation tailing thickener, Adding a flocculating agent into the direct flotation concentrate thickener, and feeding the overflow of the direct flotation concentrate thickener, the overflow of the direct flotation tailing thickener and the filtrate of the filter into a direct flotation return water tank.
(3) And the waste water in the reverse flotation return pool is clarified and then is conveyed to each water utilization point of the reverse flotation ore grinding and flotation operation by a pump, the waste water in the forward flotation return pool is clarified and then is conveyed to each water utilization point of the forward flotation ore grinding and flotation operation by a pump, and the residual waste water in the forward flotation return pool is conveyed to the reverse flotation return pool by a pump for use in the reverse flotation operation.
Embodiment 6, a reverse-forward flotation method experiment III of silico-calcium collophanite, which comprises the following specific steps:
(1) crushing raw ore, feeding into a first-stage ore grinding and grading operation, wherein the ore grinding fineness realizes that useful minerals and carbonate gangue minerals are subjected to monomer dissociation, the ore grinding fineness is-200 meshes and is 62.0%, feeding ore pulp into a reverse flotation and magnesium removal operation, in a magnesium removal reverse flotation system, an inhibitor is phosphoric acid, the using amount of the phosphoric acid is 6.0kg/t of raw ore, and a collecting agent is fatty acid soap organic matters, and the using amount of the collecting agent is 0.5kg/t of raw ore. After flotation is finished, products in a flotation machine tank are fed into reverse flotation rough concentrate concentration operation, 1.0kg/t of raw ore of water glass and 0.1kg/t of raw ore of sodium hexametaphosphate are added in the concentration operation, the underflow of the concentration machine is fed into concentrate filtration operation, the overflow of the thickener and filtrate are fed into a reverse flotation water return tank, and filter cakes are fed into second-stage ore grinding operation after size mixing. Adding or not adding a flocculating agent into a reverse flotation tailing thickener, a tailing thickener and a reverse flotation rough concentrate thickener, feeding overflow of the thickener and filtered filtrate into a reverse flotation water returning pool, feeding foam products into tailing concentration operation, feeding overflow of the thickener into the reverse flotation water returning pool, feeding underflow of the thickener into tailing filter pressing operation, performing dry-stacking treatment on filtered tailings, and feeding overflow of the thickener and filter press filtrate into the reverse flotation water returning pool;
(2) the dewatered reverse flotation rough concentrate is subjected to size mixing and then fed into a second-stage ore grinding operation, the ground product is fed into a forward flotation desilication operation, the ore grinding fineness is 87 percent of minus 200 meshes, in a desilication forward flotation system, sodium carbonate is selected as a pH regulator, the consumption is 2.0kg/t of raw ore, water glass is selected as an inhibitor of silicate minerals, the consumption is 4.0kg/t of raw ore, a collecting agent is selected from fatty acid soap organic matters, the consumption is 1.1kg/t of raw ore, foam products of a flotation machine are fed into a filter pressing operation, the filtered concentrate is the final concentrate, filtered filtrate is fed into a forward flotation return water tank, products in the flotation tank are fed into tailing filter pressing operation, the filtered tailings are subjected to dry stacking treatment, the filtrate is fed into the forward flotation return water tank, the forward flotation concentrate dewatering operation comprises thickening operation or filtering operation, and a forward flotation tailing thickener, Adding a flocculating agent into the direct flotation concentrate thickener, and feeding the overflow of the direct flotation concentrate thickener, the overflow of the direct flotation tailing thickener and the filtrate of the filter into a direct flotation return water tank.
(3) And the waste water in the reverse flotation return pool is clarified and then is conveyed to each water utilization point of the reverse flotation ore grinding and flotation operation by a pump, the waste water in the forward flotation return pool is clarified and then is conveyed to each water utilization point of the forward flotation ore grinding and flotation operation by a pump, and the residual waste water in the forward flotation return pool is conveyed to the reverse flotation return pool by a pump for use in the reverse flotation operation.
In the above experimental examples, the filter is one of a ceramic filter, a belt vacuum filter, a vertical filter press and a full-automatic chamber filter press used in the operations of reverse flotation rough concentrate, reverse flotation tailings, forward flotation concentrate and forward flotation tailings. The equipment used for the desliming operation of the reverse flotation rough concentrate is a swirler.
Claims (10)
1. A reverse flotation method of silico-calcic collophanite is characterized in that: after grinding raw ore, adopting a flotation process of firstly reverse flotation to remove magnesium and then direct flotation to remove silicon; and returning the reverse flotation backwater into a reverse flotation backwater pool for reverse flotation and demagging, returning the forward flotation backwater into a forward flotation backwater pool for forward flotation and desilicification, and feeding the surplus forward flotation backwater into the reverse flotation backwater pool for reverse flotation.
2. The reverse-forward flotation method of silico-calcic collophanite according to claim 1, characterized in that: the method adopts stage grinding stage sorting, the crushed raw ore is firstly fed into a first stage grinding operation, after carbonate gangue ore is firstly sorted out through reverse flotation demagging operation, the carbonate gangue ore is fed into a second stage grinding operation, and the ground ore pulp is fed into a positive flotation desilication operation.
3. The reverse flotation method of silico-calcic collophanite according to claim 2, characterized in that the grinding fineness of the primary grinding is 50.00% -75.00% of-200 meshes; the grinding fineness of the secondary grinding ore is 75-100% of-200 meshes.
4. The reverse flotation method of silicon-calcium collophanite according to claim 1, 2 or 3 is characterized by comprising the following steps:
(1) feeding the crushed raw ore into a primary grinding operation, feeding the ore pulp into a reverse flotation demagging operation, feeding the product in a flotation machine tank into a reverse flotation rough concentrate dewatering operation, and feeding the filtrate into a reverse flotation return water tank; feeding the foam product into a tailing pond or a tailing storage yard through dehydration operation, and feeding the filtrate into a reverse flotation return water tank;
(2) the dewatered reverse flotation rough concentrate filter cake is subjected to size mixing and then fed into a second-stage ore grinding operation, the ground product is fed into a positive flotation desilication operation, the foam product is fed into a positive flotation rough concentrate dewatering operation, and the filtrate is fed into a positive flotation return water tank; the products in the flotation tank are fed into a tailing pond or a tailing storage yard through dehydration operation, and the filtered filtrate is fed into a positive flotation return water tank;
(3) and returning the backwater of the reverse flotation backwater tank to the reverse flotation tank for use, returning the backwater of the forward flotation backwater tank to the forward flotation tank for use, and feeding the surplus backwater of the forward flotation tank to the reverse flotation backwater tank.
5. The reverse-forward flotation method of silico-calcic collophanite according to claim 4, characterized in that: before the dehydration operation of the product in the tank of the reverse flotation operation, the desliming operation can be selected according to the granularity composition and grade distribution of the rough concentrate.
6. The reverse-forward flotation method of silico-calcic collophanite according to claim 4, characterized in that: the dewatering operation of products in a reverse flotation tank comprises thickening operation and filtering operation, the products in the reverse flotation tank are firstly fed into a reverse flotation rough concentrate thickener, the foam products of the reverse flotation are fed into a tailing thickener, the underflow of the rough concentrate thickener is selectively fed into desliming operation or directly fed into filtering operation according to the properties of ores, the overflow of the desliming operation is fed into the tailing thickener for operation, the settled sand of the desliming operation is fed into the concentrate filtering operation, the filtrate is fed into a reverse flotation return water tank, and the filter cake is subjected to size mixing and then fed into secondary grinding operation.
7. The reverse-forward flotation method of silico-calcic collophanite according to claim 6, characterized in that: optionally adding a flocculating agent into the reverse flotation tailing thickener, the tailing thickener and the rough concentrate thickener, adding a dispersing agent into the rough concentrate thickener, and feeding the overflow of the thickener and the filtered overflow into a reverse flotation water return pool; the dispersant is selected from one or more of water glass, sodium hexametaphosphate, BS, OP-10 and a super dispersant; the additive of the dispersing agent is preferably 1-2 kg/ton of coarse concentrate.
8. The reverse-forward flotation method of silico-calcic collophanite according to claim 4, characterized in that: the positive flotation concentrate dehydration operation comprises thickening operation or filtering operation; wherein, flocculating agents are added into the positive flotation tailing thickener and the positive flotation concentrate thickener, and the positive flotation concentrate thickener overflows, the positive flotation tailing thickener overflows and filter filtrate is fed into a positive flotation return water tank.
9. The reverse-forward flotation method for silico-calcic collophanite according to any one of claims 1-4, characterized in that: and the waste water in the reverse flotation return tank is clarified and then is conveyed to each water using point of reverse flotation ore grinding and reverse flotation operation by a pump, the waste water in the forward flotation return tank is clarified and then is conveyed to each water using point of forward flotation ore grinding and flotation operation by a pump, and the residual waste water in the forward flotation return tank is conveyed to the reverse flotation return tank for reverse flotation operation by a pump.
10. The reverse-forward flotation method for silico-calcic collophanite according to any one of claims 1-4, characterized in that: adding a dispersant into a product in a tank obtained by reverse flotation magnesium removal operation; the dispersant is selected from one or more of water glass, sodium hexametaphosphate, BS, OP-10 and a super dispersant; the additive of the dispersant is preferably 1-2 kg/ton of product in the tank.
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