12results about How to "Good defluoridation effect" patented technology

The invention discloses a fluorine removal agent as well as a preparation method and application thereof, and relates to the technical field of fluorine ion treatment. The fluorine removal agent comprises the following preparation raw materials: metal salt containing aluminum and iron, an acrylamide monomer and a cationic polymer monomer. The fluorine removal agent can achieve deep fluorine removal of industrial fluorine-containing wastewater, flocs generated in the fluorine removal process are large, compact and high in settling speed, and the fluorine removal agent has the advantages of being wide in pH use range, high in removal efficiency and the like, can rapidly reduce the concentration of fluorine ions in the wastewater to 1.0 mg / L or below, still has the fluorine removal rate of 80% or above for fluorine-containing wastewater with the concentration lower than 10 mg / L, and has a good application prospect. And the dosage of the fluorine removal agent is low, and an excellent fluorine removal effect can be realized when the dosage is less than 500mg / L.

The invention discloses a method for removing fluorine from high-fluorine tungsten ore, which comprises the following steps of: S1, carrying out ball milling on the high-fluorine tungsten ore to enable the granularity of ore pulp to be less than 325 meshes, and enabling the obtained ore pulp to enter the next procedure; on one hand, fluorine is removed from the source, the fluorine is concentrated and enriched from the source, the fluorine is removed by adding the fluorine removal agent, the fluorine element is prevented from entering the main process to pollute the production process and the product, and compared with the fluorine removal in the production wastewater, the fluorine removal difficulty and the wastewater fluorine removal treatment cost are reduced; on the other hand, excessive sodium hydroxide after the soda boiling decomposition process is concentrated, enriched and recycled, and the defluorinated sodium hydroxide mother liquor is returned to the main process for pulp mixing and soda boiling for use, so that the use amount of new alkali in the soda decomposition process is greatly reduced, the production cost is saved, and the economic benefits of enterprises are increased; the method is simple to operate, cheap in raw materials, low in energy consumption and easy to industrialize.

A treatment agent for acidic fluorine-containing wastewater and a method for using the same. The treatment agent for acidic fluorine-containing wastewater of the present invention comprises an agent A and an agent B; the agent A comprises carbonate minerals and silicate minerals; the agent B is mainly aluminum salt. The method for using the treatment agent for acidic fluorine-containing wastewater of the present invention comprises the following steps: (1) pretreatment: sedimentation filtration to remove suspended solids; (2) pH adjustment: adding agent A to the acidic fluorine-containing wastewater to make the solution pH 6.5-7.5; (3) coagulation precipitation: adding agent B to the solution, standing and precipitating after reaction, and the supernatant is discharged. The use of the treatment agent for acidic fluorine-containing wastewater of the present invention can effectively improve the acid-base buffering capacity of the water quality, and spontaneously stabilize the pH to 6.5-7.5, with high fluorine removal efficiency. It can also improve the sedimentation efficiency of the fluorine removal alum flower, avoid the use of polyacrylamide, and the treatment process is simple and low-cost.

The invention discloses a sponge-based defluorination composite material as well as a preparation method and application thereof. The sponge-based defluorination composite material comprises sponge serving as a carrier and metal salt loaded on the sponge, the metal salt comprises iron metal salt, aluminum metal salt and lanthanum metal salt; the iron metal salt is ferric sulfate or ferric chloride, the aluminum metal salt is aluminum chloride, and the lanthanum metal salt is lanthanum chloride or lanthanum nitrate. Compared with other adsorption type defluorination materials, the sponge-based defluorination composite material disclosed by the invention is low in cost, convenient to use and capable of being repeatedly used for many times; meanwhile, the sponge-based defluorination composite material is high in defluorination efficiency and stable in performance, and has remarkable application advantages.

The invention discloses a zirconium hydroxide powder material and a preparation method and defluorination application thereof. The zirconium hydroxide powder material comprises ZrO (OH) 2, the specific surface area is larger than 55.7 m < 2 > / g, and the zirconium hydroxide powder material has high adsorption activity, has a good defluorination effect when applied to defluorination of an aqueous solution and plays a role in reducing the dosage of a defluorination agent. The zirconium hydroxide powder material is good in regeneration effect after defluorination, the regeneration process is simple, and the consumed time is short. The zirconium hydroxide powder is obtained by mixing commercially available zirconium hydroxide with ammonia water, standing and then carrying out heat treatment, and the method is simple, controllable and suitable for industrial production.

A method for removing fluorine from fluorine-containing salts comprises the following steps: (1) preparing a saturated salt solution containing fluorine, filtering to remove insoluble impurities; (2) selectively adding alkali to the filtrate of step (1), adding calcium chloride according to the fluorine content in the filtrate, heating and stirring to react; (3) adding a defluorinating agent, selectively adding alkali, heating and stirring to react; (4) selectively adding an acid and filtering to obtain a salt solution with a low fluorine content, and concentrating, dehydrating, crystallizing and drying the salt solution to obtain a solid salt. The method for removing fluorine from fluorine-containing salts of the present invention has a simple process flow, less three wastes, and low energy consumption, and solves the problems of difficult filtration of calcium fluoride, slow filtration speed, and unclear filtrate in traditional processes, and has the advantages of good defluorination effect and high filtration efficiency.

The invention discloses a preparation method and application of a high-dispersity cerium-based coordination polymer, and belongs to the technical field of environmental composite functional materials. The preparation method comprises the following steps: by taking a plant phenolic aldehyde solution as a dispersion medium, cerium ions as an inorganic metal center and an organic ligand 2-aminoterephthalic acid as a bridging agent, carrying out high-temperature mixing reaction to obtain Ce-PNTA; the cerium-based coordination polymer prepared by the invention has good dispersibility in water and is not easy to agglomerate and inactivate; the fluorine ions in water can be efficiently adsorbed, the pH window of fluorine ion adsorption in water is widened, fluorine-containing sewage treatment under acidic, neutral and weakly alkaline conditions (pH 7-9) can be realized, the bottleneck that fluorine ions are difficult to separate in neutral and alkaline water is solved, and the fluorine-containing sewage treatment agent has the advantages of environment friendliness and low preparation cost.

The utility model provides an intelligent dosing device for defluorination of waste water at the tail end of a power plant, which relates to the technical field of waste water treatment and sequentially comprises an adjusting tank, a first pipeline mixer, a coagulating basin, a second pipeline mixer and a flocculation basin according to a waste water passing sequence, meanwhile, the on-line flowmeter, the first on-line pH meter, the fluorine ion on-line detector and the second on-line pH meter are arranged and used for measuring wastewater data and transmitting the wastewater data to the intelligent control system, and then the intelligent control system regulates and controls the dosing amount according to the transmitted wastewater data, so that the purpose of intelligent dosing is achieved, and reaction conditions are effectively controlled. According to the utility model, the technical problem that the automatic dosing system in the prior art cannot control the reaction condition and flocculation reaction of the fluorine removal agent is solved, and the technical effects of effectively improving the use efficiency of the fluorine removal agent, avoiding the shortage or excess of the fluorine removal agent, and being good in fluorine removal effect and good in flocculation treatment are achieved.

The present invention discloses a rare earth element modified aluminum iron-based defluorinating agent and a preparation method thereof. The defluorinating agent in the present invention is composed of an aluminum iron base material and a rare earth composite modified material, and the mass ratio of the aluminum iron base material to the rare earth composite modified material is 100: (1-5); the aluminum iron base material is composed of activated alumina, aluminum salt and iron salt, and the mass ratio of the activated alumina, aluminum salt and iron salt is (3-5): (10-18): (5-8); the rare earth composite modified material is a rare earth element chloride. The aluminum iron-based defluorinating agent in the present invention has a simple production process, and the obtained rare earth element chloride can be directly used without separation and purification, so that the production cost is greatly reduced, and the rare earth element modified aluminum iron-based defluorinating agent prepared in the present invention can be used for the deep treatment of fluorine-containing wastewater, and the defluorination effect is remarkable, especially for fluorine-containing wastewater with a fluoride ion concentration of less than 8mg / L. After deep treatment, its defluorination rate can reach up to 90.79%.

The present application relates to wastewater treatment technical field, disclose a kind of processing method of inorganic fluorine-containing wastewater, comprising the following steps: the pH of inorganic fluorine-containing wastewater is adjusted to 2~4, calcium carbonate is loaded into carbide slag, and reaction is carried out;Coagulant is added to the wastewater after step S1 processing, coagulation and precipitation are carried out, and the precipitate is separated out.In the present application, the fluorine ion in wastewater is converted into calcium fluoride by using calcium carbonate loaded carbide slag, which can reduce the adhesion and wrapping of calcium fluoride on the surface of carbide slag, thereby achieving better wastewater defluorination effect under smaller carbide slag dosage, which is beneficial to reduce sludge amount.

The utility model relates to the technical field of wastewater treatment, in particular to fluorine-containing wastewater defluorination equipment which comprises a tank body, a controller, a separation seat, a reaction cavity, a filtering cavity, a feeding hole, a heating assembly, a mixing assembly, a separation disc, a rotating assembly, a discharging hole and a connecting hole, a filter plate is obliquely arranged at the top end of the partition supporting plate, the partition supporting plate divides the lower portion of the filter plate into a water outlet area and a grain outlet area from left to right in sequence, a water outlet and a grain outlet are formed in the bottom of the water outlet area and the bottom of the grain outlet area respectively, and a plurality of filter holes are vertically formed in the filter plate. The filter holes are arranged opposite to the water outlet area, and the bottommost end of the filter plate extends into the grain outlet area; the aluminum alginate particle defluorination device not only can heat aluminum alginate particles to enable the aluminum alginate particles to fully react with fluorine-containing wastewater, is better in defluorination effect, but also facilitates replacement of the reacted aluminum alginate particles, and is more convenient to use.

The invention discloses a composite defluoridation agent for lithium mica ore dressing wastewater and its preparation method and application, including a primary defluoridation agent and a secondary defluoridation agent added in two steps; the components of the primary defluoridation agent include: 55-80 parts of defluoridation agent, 10-20 parts of adsorption decomposition agent, 5-10 parts of clarifier, 5-10 parts of neutralizer, and 0-5 parts of buffer; the components of the secondary defluoridation agent include: 60-85 parts of defluoridation agent, 5-10 parts of adsorption decomposition agent, 10-15 parts of clarifier, 0-5 parts of neutralizer, and 0-10 parts of buffer. The composite defluoridation agent in the present invention can destroy the complex system of fluorosilicate, so that it can form an insoluble fluoride precipitate with the defluoridation agent and be removed, and by the method of using two-stage defluoridation agents in combination, the problem of fluoride ions being difficult to remove in lithium mica ore dressing wastewater is solved, so that the fluoride ions of the treated effluent are stably up to standard.