CN113600347B - Filter-pressing release agent for phosphate rock flotation tailings and use method thereof - Google Patents
Filter-pressing release agent for phosphate rock flotation tailings and use method thereof Download PDFInfo
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- CN113600347B CN113600347B CN202110826162.0A CN202110826162A CN113600347B CN 113600347 B CN113600347 B CN 113600347B CN 202110826162 A CN202110826162 A CN 202110826162A CN 113600347 B CN113600347 B CN 113600347B
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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
- B03D1/02—Froth-flotation processes
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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
- B03D1/14—Flotation machines
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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
- B03D1/14—Flotation machines
- B03D1/1443—Feed or discharge mechanisms for flotation tanks
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Abstract
The invention provides a filter pressing and shedding agent for reverse flotation tailings of phosphate and a using method thereof; the exfoliating agent comprises the following raw materials: 60-100 parts of potassium alum, 5-35 parts of sodium lignosulfonate and 5-15 parts of tannic acid; the shedding agent is prepared into 2-6% aqueous solution, the aqueous solution is added into the tailing slurry before flotation and filtration according to the dosage of 200-1000g/t, the tailing slurry and the shedding agent are mixed for 10-60 minutes and then filtration is carried out, the dispersibility of the tailing slurry can be effectively improved, the adhesion of a filter cake to the surface of filter cloth is overcome, the shedding efficiency of the filter cake is obviously improved during unloading, and the water content of the filter cake is reduced. The phosphorite flotation tailings absorb a large amount of flotation collecting agents, are high in argillization degree and pulp viscosity, and have the problems of filter cloth blockage and difficult falling of filter cake sticky plates in filter pressing.
Description
Technical Field
The invention relates to the field of industrial filter aid, in particular to a desquamating agent for filter pressing of reverse flotation tailings of phosphorus ore and a using method thereof.
Background
Phosphorite is an important strategic resource and plays an important role in national economy. The total amount of Chinese phosphorite resources is rich, but the middle-low grade phosphorite is more, and deep processing is carried out after mineral dressing. According to the principle of 'less floating and more inhibiting', reverse flotation is generally adopted in the industry to remove gangue minerals at present, and although better phosphate concentrate is obtained, tailings are treated to cause headache.
Because the reverse flotation tailings adsorb a large amount of flotation collectors, the granularity is fine, and the mud content is high, so that the water content of a filter cake is high, the filter cloth is blocked, and a filter cake sticky plate is not easy to fall off to cause difficulty in tailing treatment in the filter pressing process of the tailings. Particularly, the gradual industrial application of the double-reverse process, the silicate tailings removed by the cation reverse flotation are difficult to add in the filter pressing process.
Aiming at the problems of filter pressing, the feed concentration is generally improved, the filtering area is increased, and the filter cloth is frequently replaced and relieved.
Application number 201010529104.3 discloses a filter aid for filtering phosphate reverse flotation tailings and a preparation method thereof, wherein a methylene dinaphthalene sodium sulfonate solution and sodium disulphonate are mixed according to a mass ratio of 1:0.05 to 0.1 to prepare the filter aid for filtering the phosphate reverse flotation tailings, and the filter aid is applied to ensure that the water content of the phosphate tailing filter cake and the mud content of the filtrate are low.
Application number 201310078385.9 discloses a device and a method for pre-spraying a filter aid on a plate-frame filter, wherein the method comprises the steps of pre-spraying the filter aid on the surface of filter cloth before plate-frame filtration to form a filter aid layer, so that feed liquid substances are prevented from directly contacting the filter cloth and blocking a feed liquid filtering channel; and in the filtering process, multiple filtering and separation of the filter cloth, the filter aid layer and the filter cake are realized, the single filtering capacity is improved, the filter residue is formed into a cake and is thoroughly separated from the filter cloth, and the difficulty in cleaning the filter cloth is reduced.
Application number 201510906379.7 discloses a collecting agent for improving phosphorite flotation filtering effect and a preparation method thereof, and by preparing the collecting agent for improving phosphorite flotation filtering effect, qualified flotation indexes are guaranteed, the subsequent concentrate and tailing filtering efficiency is improved, the water content in the filtered concentrate and tailings is less than 10%, and the production efficiency is greatly improved.
The invention integrates the puffing effect of potassium alum, the improvement effect of sodium lignosulfonate on the fluidity and plasticity of tailing slurry, and the cohesion and tanning effect of tannic acid, so that the tailings can be solidified into blocks, the adhesion of a filter cake and a filter cloth interface is reduced, the filter cake can fall off from a filter plate quickly, the filter cloth is clean and dry, and the water content of the filter cake is reduced. The filter pressing exfoliant for phosphate rock flotation tailings and the use method thereof are industrially applied and have better popularization prospect.
Disclosure of Invention
The invention provides a filter pressing remover for phosphate rock flotation tailings and a using method thereof, which solve the problems that a large amount of flotation collector agents are adsorbed by phosphate rock flotation tailings, the argillization degree is high, the pulp viscosity is high, the water content of a filter cake is high, filter cloth is blocked during filter pressing, and a filter cake sticky plate is not easy to fall off, and the invention adopts the following technical scheme for achieving the purpose:
a filter pressing and stripping agent for phosphate rock flotation tailings is prepared by mixing potassium alum, sodium lignosulfonate and tannic acid according to a certain proportion.
The shedding agent comprises, by weight, 60-100 parts of potassium alum, 5-35 parts of sodium lignosulfonate and 5-15 parts of tannic acid.
The invention also provides a use method of the filter pressing release agent for the phosphorite flotation tailings, which comprises the following steps:
(1) The exfoliant is prepared into 2-6% aqueous solution, preferably 5%;
(2) Carrying out filter pressing after the obtained shedding agent aqueous solution and tailing slurry are mixed for 10-60 minutes, preferably adding the shedding agent to the underflow of a thickener to a conveying pipeline of a filter pressing tailing slurry storage tank, and preferably mixing for 30-60 minutes;
(3) The addition amount of the shedding agent is 200-1000g/t of tailing dry basis;
compared with the prior art, the technical scheme of the invention has the following beneficial technical effects:
(1) By using the shedding agent and the using method, the service cycle of the filter cloth is prolonged, the auxiliary unloading work is cancelled, the single circulation time of filter pressing is shortened, the water content of the filter cake is reduced, and the production efficiency is obviously improved.
(2) The raw materials of the exfoliating agent are easy to purchase and have lower price, and the preparation and the use method of the exfoliating agent are simple, convenient and easy;
Detailed Description
The following further describes specific embodiments of the present invention in order to facilitate further understanding of the present invention by those skilled in the art, and does not constitute a limitation to the claims thereof.
Example 1
Embodiment 1 is an application of the exfoliant and the using method of the present invention in filter pressing of collophanite anion reverse flotation decarbonation tailings, wherein the concentration of the thickened tailings is 50%, the pH value is 5.6, the content of dolomite is 75%, the content of apatite is 15%, the content of minus 0.074mm is 65%, and the specific process steps are as follows:
70kg of potassium alum, 25kg of sodium lignosulfonate and 5kg of tannic acid are mixed to form a shedding agent, a 5% aqueous solution is prepared and then is added at the outlet of a underflow pump of a tailing thickener, filter pressing is carried out after the mixing action time is 30 minutes, and the application result is as follows according to the general recommended dosage of a filter aid, wherein the plate sticking rate of a filter cake is the ratio of the dry basis weight adhered to a filter cloth to the total dry basis weight (plate sticking plus shedding) after the unloading is finished.
Example 2
Embodiment 2 is an application of the exfoliant and the using method of the present invention in filter pressing of collophanite anion reverse flotation decarbonation tailings, wherein the concentration of the thickened tailings is 50%, the pH value is 5.6, the content of dolomite is 75%, the content of apatite is 15%, the content of minus 0.074mm is 65%, and the specific process steps are as follows:
mixing 85kg of potassium alum, 12kg of sodium lignosulfonate and 3kg of tannic acid to form a shedding agent, preparing a 5% aqueous solution, adding the aqueous solution to an outlet of a underflow pump of a tailing thickener, performing filter pressing after mixing for 30 minutes, and according to the usually recommended dosage of a filter aid, obtaining the following application result, wherein the plate bonding rate of a filter cake is the ratio of the dry basis weight adhered to a filter cloth to the total dry basis weight (plate bonding and shedding) after unloading.
Example 3
Embodiment 3 is an application of the exfoliant and the using method of the present invention in filter pressing of collophanite anion reverse flotation decarbonation tailings, wherein the concentration of the thickened tailings is 50%, the pH value is 5.6, the content of dolomite is 75%, the content of apatite is 15%, the content of minus 0.074mm is 65%, and the specific process steps are as follows:
the exfoliant is 100kg of potassium alum, is prepared into a 5% aqueous solution, is added at the outlet of a underflow pump of a tailing thickener, is subjected to filter pressing after mixing action time is 30 minutes, and has the following application result according to the general recommended dosage of a filter aid, wherein the plate bonding rate of a filter cake is the ratio of the dry basis weight to the total dry basis weight (plate bonding plus exfoliation) of filter cloth after unloading is finished.
Example 4
Embodiment 4 is an application of the exfoliant and the using method of the present invention in filter pressing of collophanite anion reverse flotation decarbonated tailings, wherein the concentration of the thickened tailings is 50%, the pH value is 5.6, the content of dolomite is 75%, the content of apatite is 15%, the content of minus 0.074mm is 65%, and the specific process steps are as follows:
mixing 75kg of potassium alum and 25kg of sodium lignosulfonate into a shedding agent, preparing into a 5% aqueous solution, adding the aqueous solution into an outlet of a underflow pump of a tailing thickener, performing filter pressing after mixing for 30 minutes, and according to the generally recommended dosage of a filter aid, obtaining the application result as follows, wherein the plate bonding rate of a filter cake is the ratio of the dry basis weight of a filter cloth to the total dry basis weight (plate bonding and shedding) after unloading.
Example 5
Embodiment 5 is an application of the exfoliant and the using method of the present invention in pressure filtration of collophanite cation reverse flotation desilicated tailings, wherein the concentration of the thickened tailings is 46%, the pH value is 7.6, the feldspar content accounts for 50%, the apatite content accounts for 30%, and-0.074 mm accounts for 70%, and the specific process steps are as follows:
70kg of potassium alum, 25kg of sodium lignosulfonate and 5kg of tannic acid are mixed to form a shedding agent, a 5% aqueous solution is prepared and then is added at the outlet of a underflow pump of a tailing thickener, filter pressing is carried out after the mixing action time is 30 minutes, and the application result is as follows according to the general recommended dosage of a filter aid, wherein the plate sticking rate of a filter cake is the ratio of the dry basis weight adhered to a filter cloth to the total dry basis weight (plate sticking plus shedding) after the unloading is finished.
Example 6
Embodiment 6 is an application of the exfoliant and the using method of the present invention in filter pressing of collophanite anion reverse flotation decarbonated tailings, wherein the concentration of the thickened tailings is 46%, the pH value is 7.6, the feldspar content accounts for 50%, the apatite content accounts for 30%, the minus 0.074mm accounts for 70%, and the specific process steps are as follows:
mixing 85kg of potassium alum, 12kg of sodium lignosulfonate and 3kg of tannic acid to form a shedding agent, preparing a 5% aqueous solution, adding the aqueous solution to an outlet of a underflow pump of a tailing thickener, performing filter pressing after mixing for 30 minutes, and according to the usually recommended dosage of a filter aid, obtaining the following application result, wherein the plate sticking rate of a filter cake is the ratio of the dry basis weight adhered to a filter cloth to the total dry basis weight (plate sticking and shedding) after discharging is finished.
Example 7
Embodiment 7 is an application of the exfoliant and the using method of the present invention in filter pressing of collophanite anion reverse flotation decarbonated tailings, wherein the concentration of the thickened tailings is 46%, the pH value is 7.6, the feldspar content accounts for 50%, the apatite content accounts for 30%, and-0.074 mm accounts for 70%, and the specific process steps are as follows:
the exfoliant is 100kg of potassium alum, is prepared into a 5% aqueous solution, is added at the outlet of a underflow pump of a tailing thickener, is subjected to filter pressing after mixing action time is 30 minutes, and has the following application result according to the general recommended dosage of a filter aid, wherein the plate bonding rate of a filter cake is the ratio of the dry basis weight to the total dry basis weight (plate bonding plus exfoliation) of filter cloth after unloading is finished.
Example 8
Embodiment 8 is an application of the exfoliant and the using method of the present invention in filter pressing of collophanite anion reverse flotation decarbonated tailings, wherein the concentration of the thickened tailings is 46%, the pH value is 7.6, the feldspar content accounts for 50%, the apatite content accounts for 30%, the minus 0.074mm accounts for 70%, and the specific process steps are as follows:
mixing 75kg of potassium alum and 25kg of sodium lignosulfonate into a shedding agent, preparing into a 5% aqueous solution, adding the aqueous solution into an outlet of a underflow pump of a tailing thickener, performing filter pressing after mixing for 30 minutes, and according to the generally recommended dosage of a filter aid, obtaining the application result as follows, wherein the plate bonding rate of a filter cake is the ratio of the dry basis weight of a filter cloth to the total dry basis weight (plate bonding and shedding) after unloading.
Claims (3)
1. The filter pressing release agent for the phosphorite flotation tailings is characterized by being prepared by mixing 60-100 parts by weight of potassium alum, 5-35 parts by weight of sodium lignosulfonate and 5-15 parts by weight of tannic acid in parts by weight of release agent raw materials.
2. The use method of the filter pressing release agent for the phosphorite flotation tailings is characterized by comprising the following steps:
(1) Potassium alum, sodium lignosulfonate and tannic acid are mixed to prepare an exfoliant water solution with the mass concentration of 2-6%, wherein the exfoliant raw materials comprise, by weight, 60-100 parts of potassium alum, 5-35 parts of sodium lignosulfonate and 5-15 parts of tannic acid;
(2) The obtained shedding agent aqueous solution is mixed with tailing slurry for 10 to 60 minutes and then is subjected to filter pressing operation.
3. The use method of the filter pressing release agent for the phosphate rock flotation tailings according to claim 2, wherein the addition amount of the release agent is 200-1000g/t dry tailings basis.
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| CN1887402A (en) * | 2006-08-01 | 2007-01-03 | 中国铝业股份有限公司 | Method of dewatering concentrated bauxite |
| CN101137443A (en) * | 2004-12-23 | 2008-03-05 | 佐治亚-太平洋化学有限责任公司 | Amine-aldehyde resins and uses thereof in separation processes |
| CN101234271A (en) * | 2007-11-16 | 2008-08-06 | 黄樟焱 | Not easy-to-block high-precision micropore ceramic filtering process and device |
| CN101391163A (en) * | 2008-10-24 | 2009-03-25 | 郴州市黄沙坪铁选矿有限责任公司 | New flotation molybdenum concentrate filter dehydration technique |
| CN106362480A (en) * | 2016-11-24 | 2017-02-01 | 官景梁 | Efficient filtering method of concentrate pulp |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8377853B2 (en) * | 2006-04-20 | 2013-02-19 | M-I L.L.C. | Aqueous gels for well bore strengthening |
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- 2021-07-21 CN CN202110826162.0A patent/CN113600347B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101137443A (en) * | 2004-12-23 | 2008-03-05 | 佐治亚-太平洋化学有限责任公司 | Amine-aldehyde resins and uses thereof in separation processes |
| CN1887402A (en) * | 2006-08-01 | 2007-01-03 | 中国铝业股份有限公司 | Method of dewatering concentrated bauxite |
| CN101234271A (en) * | 2007-11-16 | 2008-08-06 | 黄樟焱 | Not easy-to-block high-precision micropore ceramic filtering process and device |
| CN101391163A (en) * | 2008-10-24 | 2009-03-25 | 郴州市黄沙坪铁选矿有限责任公司 | New flotation molybdenum concentrate filter dehydration technique |
| CN106362480A (en) * | 2016-11-24 | 2017-02-01 | 官景梁 | Efficient filtering method of concentrate pulp |
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