312results about How to "Fast precipitation" patented technology

The invention relates to a heavy metal stabilizer for removal of heavy metal pollution and its using method. The heavy metal stabilizer contains the compound lignin-based dithiocarbamate, which is a combination of one or more of lignin-based sodium dithiocarbamate, lignin-based potassium dithiocarbamate, or lignin-based ammonium dithiocarbamate, and can be used for treatment of heavy metal pollution. After treatment with the heavy metal stabilizer provided in the invention, the heavy metal content can meet the requirements of environmental protection standards. A heavy metal ion chelate formed after the treatment is chemically stable and is difficult to cause secondary pollution. Meanwhile, the treatment cost of heavy metal pollution can be significantly reduced.

The invention provides a preparation method of a superfine crystal inoculating agent for aluminum alloy grain refinement and relates to aluminum-based alloy and is a method for preparing nano-crystalline Al-Ti-B-Re thin-strip intermediate alloy by a rapid solidification technology of metal, wherein the method comprises steps as follows: proportioning 5-5.4% of Ti, 1-1.04% of B, 1-1.2% of Ce, 0.05-0.2% of La and the balance of Al according to determined ingredients; weighing raw materials Al-5Ti-1B intermediate alloy and lanthanum cerium alloy to proportion the materials; melting in vacuum to obtain blocky Al-5Ti-1B-1Re intermediate alloy; carrying out rapid solidification to obtain the superfine crystal inoculating agent for the aluminum alloy grain refinement, wherein the superfine crystal inoculating agent is the nano-crystalline Al-5Ti-1B-1Re intermediate alloy. With the adoption of the method provided by the invention, adverse impact of needlelike TiAl3 on the matrix structure is eliminated, nucleating particles TiAl3 with thinner size and more dispersed distribution are obtained, and superfine nucleating particles are realized.

The invention discloses a split-range drying method for paddy. The method has the technical points: performing preliminary cleaning and hot air drying on harvested high-moisture paddy, tempering, redrying and retempering the paddy, and keeping the ratio of the drying time to the tampering time within the range from 1 to 6 until the moisture content is reduced to 18.5 to 18 percent; conveying the paddy into a paddy temporary storage warehouse for slow cooling, ventilation and temporary storage; performing the hot air drying on the paddy of the temporary storage warehouse with a dryer after the paddy harvest season, retempering, drying and retempering the paddy, keeping the ratio of the drying time to the tampering time within the range from 1 to 8 until the moisture of the paddy is reduced to be below 14.5 percent; and conveying the paddy to a warehouse for storage. The method has the advantages of improving the moisture reducing rate and the utilization efficiency of the paddy dryer, reducing the loss after the paddy production caused by high moisture during the concentrated paddy harvest season, ensuring the safety for dry storage of the foodstuffs and having obvious economic benefit and social benefit on the premise of ensuring the drying quality of the paddy.

The invention discloses a miscellaneous filtering device for sewage treatment, which includes a miscellaneous discharge chamber, a primary sedimentation chamber and a secondary sedimentation chamber, a water inlet pipe is installed above the left end of the miscellaneous discharge chamber, and the waste discharge chamber The middle position of the left side wall of the miscellaneous room is provided with a first motor, and the right end of the first motor is equipped with a first rotating shaft. filter screen, the bottom plane of the miscellaneous room is provided with a miscellaneous bucket, the bottom end of the described miscellaneous bucket is provided with a miscellaneous chamber, and the described primary sedimentation chamber is located on the right side of the miscellaneous room. The miscellaneous room and the primary sedimentation chamber are communicated through the infusion tube, and the top of the primary sedimentation chamber is provided with an auxiliary material box; the beneficial effect of the present invention is: the principle of multi-stage sedimentation is adopted, and the sewage in the upper layer is repeatedly pumped out before being treated. Filtration treatment can fully ensure the quality of sewage after filtration.

The invention belongs to the field of rare earth gathering, and particularly relates to an organic precipitator as well as a preparation method and application thereof. The organic precipitator provided by the invention is prepared from one or more of structural compounds of formula (I) to formula (III), wherein R1, R2, R3 and R'3 are independently selected from hydrogen, substituted or non-substituted linear chain alkyl with the number of carbon atoms of 1 to 10, substituted or non-substituted branched alkyl with the number of the carbon atoms of 3 to 10, and substituted or non-substituted aryl; n is a natural integer; and M<n+> indicates cations. The organic precipitator provided by the invention has good selectivity to the rare earth and is very suitable for gathering rare-earth elements in a low-concentration rare-earth solution. The experiment result shows that when the organic precipitator provided by the invention is used for gathering the rare earth in the low-concentration rare earth solution, the precipitation speed is high, the purity of the gathered rare earth product is greater than 96 percent, and the yield is greater than 95 percent. (The formula (I) to (III) are shown in the description).

The invention discloses a rain water system for building districts of sponge cities. The rain water system is characterized by comprising a sedimentation pond, a distribution well, a treatment pond and overflow wells, wherein an environment-friendly rain water opening is formed in a position above the sedimentation pond, the sedimentation pond is connected with the distribution well through a water inlet pipe, a water inlet valve is arranged on the water inlet pipe, at least four distribution pipes are arranged on the left end surface of the distribution well, the distribution well is connected with the treatment pond through the distribution pipes, and the treatment pond is connected with the overflow wells through overflow pipes. A construction method of the rain water system comprises the following steps: (1) performing construction preparation; (2) excavating foundation pits; (3) performing foundation treatment; (4) building the sedimentation pond and the distribution well; (5) building the treatment pond and the overflow wells; (6) laying pipelines; and (7) performing ground treatment. The rain water system disclosed by the invention is simple in structure and high in practicability, and is used for collecting and treating rain water on the ground of building districts, so that the phenomenon of water accumulation on the ground of the districts is effectively avoided; and besides, rain water is collected, so that waste of water resources can be reduced.

The invention discloses a negative pressure air jet deep well dewatering device of a foundation pit. The negative pressure air jet deep well dewatering device comprises a negative pressure system, a positive pressure system and a deep well pipe assembly. The negative pressure system is composed of a vacuum pump, a drain pipe, a vacuum water main and a vacuum branch water pipe. The positive pressure system is composed of an air compressor, an air main, a branch air pipe, a switching valve and an air tap. The deep well pipe assembly is composed of a well pipe and a well cover. The vacuum branch water pipe of the negative pressure system extends into the well pipe through the well cover. The branch air pipe of the positive pressure system extends into the well pipe through the well cover, or penetrates into the vacuum branch water pipe from the outside of the well cover and extends into the well pipe together with the vacuum branch water pipe. The negative pressure air jet deep well dewatering device is additionally provided with the set of positive pressure system, improves the dewatering speed in the initial dewatering period, and has the advantages of high work efficiency, easiness in construction and good dewatering effect as the vacuum branch water pipe can reach downwards to the dewatering depth of the foundation pit in one time without adjustment.

The invention relates to a method for purifying seawater by taking carboxymethyl chitosan as a flocculant. The method comprises the steps of: preparing water-soluble carboxymethyl chitosan (CMC) and polyferric chloride (PFC) into aqueous solution respectively; adding both the aqueous solution into the seawater one after another to obtain a mixture; precipitating the mixture after stirring; and removing the precipitate to obtain purified seawater, wherein the mass ratio of the added CMC to the PFC to the seawater is 1ton:2-2.5g:10-20g; the aqueous solution of carboxymethyl chitosan contains 2g of carboxymethyl chitosan per liter water; and the aqueous solution of the PFC contains 5-10g of the PFC per liter water respectively. The method for purifying the seawater has the advantages of simple technological operation, readily available raw material, no secondary pollution to water body and high purification efficiency. The method not only can be used for pretreating of the seawater purifying but also can be used for treating sewage water discharged after seawater utilization, and has a wide popularization and application prospect.

The invention discloses a water coagulation treatment method. The method comprises that: a coagulating agent is adopted to carry out coagulation treatment on water; and in the process of water coagulation treatment, a catalyst and an oxidant are thrown into the water. Through the addition of the catalyst and the oxidant in the process of the water coagulation treatment, the catalyst forms a solid-liquid reaction interface in the water; and the oxidant undergoes rapid oxidation reaction on the interface and oxides organisms to destroy the protective function of the organisms on suspended particles. The adsorptive action of the catalyst can combine with colloid particles in the water to form a microfloc nucleus so as to increase the concentration of particles in the water and be favorable for the formation and growth of floc in the coagulation reaction.

The invention discloses high-strength and toughness non-quenched and tempered steel and a preparation method thereof, and belongs to the technical field of structural alloy steel. The N content is increased, Mn, Cr and V are reasonably added, and the V/N mass ratio is accurately controlled, so that the problem of incapability of combining strength, toughness and use cost of non-quenched and tempered steel in the prior art are solved. The high-strength and toughness non-quenched and tempered steel is prepared from the following components according to mass percent: 0.23 to 0.27% of C, 0.22 to 0.35% of Si, 1.81 to 1.90% of Mn, 0.50 to 0.55% of Cr, 0.045 to 0.06% of S, less than or equal to 0.02% of P, 0.11 to 0.14% of V, 0.025 to 0.040% of N and the balance of Fe and inevitable impurities. The tensile strength of the high-strength and toughness non-quenched and tempered steel is greater than or equal to 950 MPa, and the Charpy impact work KU2 (20 DEG C) is greater than or equal to 55 J.The preparation method of the high-strength and toughness non-quenched and tempered steel comprises the steps of smelting, forging and cooling after forging. The high-strength and toughness non-quenched and tempered steel can be used for automobile safety parts.

The invention provides a preparation method of a ternary precursor, the ternary precursor, a positive electrode material and a lithium ion battery, and relates to the technical field of metallurgy, and the preparation method comprises the following steps: (a) preparing a ternary precursor seed crystal in a first reaction kettle; (b) preparing ternary precursor slurry by utilizing the ternary precursor seed crystal; and (c) obtaining the ternary precursor. The method is low in requirement for production equipment, capable of achieving large-scale production, high in efficiency and stable in product quality. Primary particles on the surfaces of secondary spherical particles of the ternary precursor provided by the invention are regularly arranged and are loose and porous, and particularly gaps can be generated between primary particles. The ternary precursor can be used for preparing a positive electrode material. The positive electrode material can be used for preparing a lithium ion battery, a lithium ion diffusion channel can be increased, and the first charge-discharge performance, cycle performance and rate capability of the battery can be remarkably improved.

An improved drilling and completion fluid can be used in subterranean drilling for oil and gas. Sodium silicate and potassium silicate-based drilling fluids are commonly used drilling fluids with the notable attributes of exceptional shale stabilization characteristics coupled with exceptional environmental performance Environmental and wellbore stabilization characteristics are improved by using high ratio aqueous silicates wherein ratio is defined as the molar ratio of SiO₂:Me₂O, where Me is an alkali and is most commonly sodium or potassium (i.e. Na₂O and K₂O). For high ratio aqueous alkali silicates, the molar ratio of SiO₂:Me₂O can range from just over 4.0 to about 12.0.

Preparation of a coagulant of polyphosphate ferric chloride adopts waste phosphating residues produced from steel phosphating treatment as raw materials, and the coagulant is especially suitable for the treatment of oil-containing colored industrial wastewater. The product preparation of the invention adopts phosphating residues, industrial hydrochloric acid, and ferrous phosphate as raw materials, wherein the HCl content (weight ratio) is not less than 30%; the phosphating residues and industrial hydrochloric acid are polymerized according to a certain ratio so as to obtain clear orange liquid of polyphosphate ferric chloride. When the coagulant of polyphosphate ferric chloride of the invention is used in water supply and sewage treatment, when compared with existing coagulants, the product of the invention has the characteristics of high oil-removing and decoloration efficiency, few medicament adding amount, wide medicament adding range, and the like; the production processing process of the product does not cause secondary pollution; the production process is simple; waste phosphating residues are used as raw materials; the production cost is low; and thus the product of the invention has low price.

The invention provides a method to obtain nickel sulfide from pickle liquor of laterite nickel mine. Wherein, the leachate has pH value not less than 1.7 with nickel and sodium sulfide added for the mass ratio 1:3-8; mixing evenly, controlling the nickel ion concentration less than 0.02g/L and filtering; adding water into the residue with ratio for solid and liquid of 1:2, clearing, filtering and obtaining the product; then, neutralizing the filtrate to pH value as 2-4 for recycle or release. This method can obtain high-grade product and the nickel deposition rate can reach 99.5% or more.

The invention relates to the technical field of water processing, in particular to an integrated flocculent precipitating device, and belongs to the improvement of a water purifying device structure.The integrated flocculent precipitating device comprises a sewage and flocculant injecting device, a mud discharge device and a flocculation reaction and stirring device. The sewage and flocculant injecting device comprises a sewage and flocculant injecting pump and a water inlet pipe. The mud discharge device comprises a first motor, a mud discharge pipe and a mud scraper. The flocculation reaction and stirring device comprises a flocculation reaction barrel, a stirrer, an annular rectifying body and a second motor. The integrated flocculent precipitating device is simpler and more optimal, reasonable and compact in structure, stable in operation, low in operation cost, high in precipitating speed and high in work efficiency and remarkably has a good precipitating technological effect inpractice.

The invention discloses a composite visible-light-induced catalyst and a preparation method and application thereof. The composite visible-light-induced catalyst is prepared from CNT-silver citrate and g-C3N4-PO43- through a precipitation method, wherein the CNT-silver citrate is prepared from CNT, sodium citrate and AgNO3 through surface complexing action, and the g-C3N4-PO43- is prepared from g-C3N4 and NaH2PO4 through surface phosphorylation. The preparation method includes the steps of preparation of the CNT-silver citrate, preparation of the g-C3N4-PO43- and preparation of CNT/Ag3PO4/g-C3N4. The composite visible-light-induced catalyst can be applied to treatment of antibiotic wastewater and has the advantages of high visible light utilization rate, stable presence in water and stable photocatalytic performance.

The problem is to provide an electrolytic gold plating solution suitable for nickel barrier plating while maintaining the excellent properties of the gold plating film, e.g., mechanical characteristics, corrosion resistance, and electrical characteristics, that is, the problem is to provide an electrolytic gold plating solution capable of manufacturing a stable product that limits gold depositionat 'portions not requiring gold plating (nickel barrier portions)' where members are mechanically constrained, and ensures satisfactory gold deposition in portions requiring gold plating, without extraneous deposition of the gold. The aforementioned problem is solved by means of an electrolytic gold plating solution that contains a gold cyanide salt as the gold source, and a heterocyclic compoundhaving one or more nitrogen atoms in the ring and one or more nitro groups replacing a carbon atom in said ring, and by means of a gold film that is obtained by electrolytic gold plating onto a nickel film using the aforementioned electrolytic gold plating solution.

The invention belongs to the technical field of sewage treatment, and especially relates to an integrated sewage processing equipment. The integrated sewage processing equipment comprises a housing; the upper end of the housing is provided with a PLC controller; an inner cavity of the housing is successively connected with, from left to right, a first separation plate and a second separation plate; the side of the first separation plate opposite to the inner cavity of the housing is provided with a filter chamber, and the side of the first separation plate opposite to the second separation plate is provided with a precipitation chamber; the upper end of the filter chamber is provided with a first threaded cap; the upper end of the first threaded cap is connected with a water inlet pipe; and the two sides of an inner cavity of the precipitation chamber are provided with first sliding chutes. The integrated sewage processing equipment is reasonable in structure design, is high in practicality, is flexible in structure using, is convenient for installation, dismounting, later maintenance, using, and cleaning of accumulated sludge, and is convenient for alarming workers to clean garbage, so that sewage treatment efficiency is increased, and it is beneficial for improvement of sewage treatment effect.

The invention relates to an impurity removing method in a process of preparing alumina from fly ash by utilizing an acid method. The method comprises following steps: by utilizing the characteristic that iron (III) dimethyldithiocarbamate does not precipitate in an alkaline environment condition, adjusting the pH value of the system to the alkaline range by adding ammonia water, ammonia gas, or sodium hydroxide to precipitate iron in the form of iron hydroxide, then subjecting the reaction liquid to a filtration separation treatment so as to obtain an aluminium salt solution without iron, crystallizing the aluminium salt solution without iron to precipitate, filtrating to separate so as to obtain aluminium salt crystals and filtration liquid, burning the aluminium salt crystals so as to obtain purified alumina. The method solves the technical problems of complicated technologies and difficult separation of impurities in the conventional acid method, and has the advantages of prominent iron-removing effect, simple technology, easy operation, and low technology cost.

The invention discloses a magnetic purification system and a purification method for quickly purifying combined overflow sewage. The magnetic purification system comprises a water storage device for containing the combined overflow sewage, a sewage lifting device arranged in the water storage device, a coarse grille device arranged at a water inlet of the water storage device, a fine grille devicearranged at a water outlet of the water storage device, a charging device for feeding a material, a magnetized coagulation reaction device and a magnetic separation device, wherein the fine grille device comprises a grille pool, and a rotating drum grille and a backwash pump that are arranged in the grille pool; the magnetized coagulation reaction device comprises a mixing reaction tank; the magnetic separation device comprises a magnetic disc separator of magnetic floccules, and a slag discharge device communicated with an outlet of the mixing reaction tank; and a scraping device is arrangedbetween the slag discharge device and the magnetic disc separator. According to the magnetic purification system and the purification method, quick purification of the overflow sewage is achieved through a modular design; an integration degree is high; and the system and the method can be used for emergency treatment, are applicable to temporary treatment and can be recycled.