133results about How to "Simple cleaning process" patented technology

The invention relates to a lead-free solder water soluble flux; wherein, the weight proportions of the components are as follows: organic acid activator is 2 to 5%, amine halogen acid salt is 05 to 2.5%, nonionic surface-active material is 40 to 60%, nondrying oil is 2 to 5%, defoamer is 0.1 to 0.5%, and the rest is deionized water. The lead-free solder water soluble flux has the advantages of scientific design, reasonable ratio, and simple manufacturing technology, thus being applicable to Sn-Ag-Cu, Sn-Cu and Sn-Zn base lead-free solder, and providing a new welding material for electronic product encapsulation with no rosin, no toxin, no harms, no corrosiveness, while with good wettability and good welding performance, and safe and easy rinsing.

The invention provides a selective recovery method of lithium in waste and old lithium iron phosphate batteries. The method comprises roasting and sorting waste batteries to obtain battery material powder containing aluminum, iron and lithium, removing aluminum to obtain mixed residues containing iron and lithium, carrying out ball milling on the mixed residues containing iron and lithium to obtain powder, carrying out oxidation treatment on the powder under oxidizing conditions/medium so that ferrous iron is converted into ferric iron, wherein pH is adjusted in oxidation treatment and lithium in a ferric hydroxide stable region is selectively leached, and carrying out further treatment to obtain high purity lithium carbonate. The method simplifies a waste battery recycling process and the obtained leachate has low impurity content so that an additional leaching solution purification process is avoided, sodium carbonate solution consumption is reduced and the production of high salt waste water is avoided or greatly reduced. Compared with the prior art, the method has simple processes, realizes a low cost, prevents high salt waste water from the source, can acquire a high purity lithium carbonate product and has an excellent market application prospect.

The invention discloses a bidirectional injection moulding method of stator rubber of screw drilling tools, which belongs to the technical field of stator rubber injection of screw drilling tools andcomprises the following steps: grit-blasting; washing and drying; brushing adhesive; assembling a mould core into an internal hole of a steel pipe; putting a stator and an injection moulding mould inan oven and heating; carrying out vacuum negative-pressure rubber injection from two ends to the center of the stator; sealing the stator and putting the stator in a vulcanizing boiler to carry out vulcanization; taking out the stator and cooling; disassembling screw nuts, end caps and shims used for positioning on two ends of the stator, and pushing the mould core out of the rubber layer of the internal hole of the stator so as to be disengaged. The rubber injection method from two ends to the center of the stator prevents rubber from pressing the mould core to cause linear deformation of themould core, fundamentally eliminates the wrapping extent and the core shift of the rubber layer hole in the internal hole of the stator, greatly prolongs the service life of the stator, reduces air bubbles in the rubber layer of the stator and defects on the surface, such as pits, flow marks and the like and increases the qualification rate. The method overcomes the defects of low speed and longtime of rubber injection.

The invention discloses a method for preparing precursors of lithium titanate and lithium iron phosphate by comprehensively using ilmenite, which comprises the following steps of: 1) separating the ilmenite, namely crushing the ilmenite, leaching the ilmenite with hydrochloric acid, filtering the ilmenite to obtain a residue and a filtrate; 2) preparing the precursor of the lithium titanate, namely washing the residue prepared by step 1) with the hydrochloric acid, adding the washed residue in aqueous alkali, cooking the mixture, filtering the mixture after cooling, and then adding the obtained filter residue in the hydrochloric acid, cooking the mixture, and filtering, washing, drying and calcining the mixture after cooling to obtain the precursor of the lithium titanate; and 3) preparing the precursor of the lithium iron phosphate, namely taking the filtrate prepared by step 1) as a raw material, adding iron powder to reduce ferric iron, diluting the reduced filtrate, adding a complexing agent and a precipitant into the diluted mixture, controlling the pH value of the system, reacting the mixture at 30 to 80 DEG C, aging the reacted mixture, and filtering, washing and drying the obtained precipitate to obtain the precursor of the lithium iron phosphate. The method is wide in raw material source, simple in process flow, good and stable in product quality, low in cost and comprehensive and full in use of the ilmenite.

The invention discloses a preparation method of an ionic intercalation type two-dimensional material. The preparation method comprises the following steps: enabling salt to be in a molten state at preset temperature by using a molten-salt growth method; adding a metal salt precursor in molten salt; and reacting for preset time and taking out, cooling, cleaning, carrying out suction filtering and drying to obtain the ionic intercalation type two-dimensional material. Positive ion intercalation type two-dimensional metallic oxide and negative ion intercalation type two-dimensional metal hydroxide can be prepared; types of positive ions and negative ions in the prepared two-dimensional material can be regulated and controlled by materials of the molten salt and metal salt; another ionic intercalation type two-dimensional material can also be prepared by the method; and the prepared ionic intercalation type two-dimensional material has quite large application prospect in the aspects of energy storage, catalysis, ion exchange and the like.

The invention relates to a preparation method of a TiB2 ultrafine powder material. The preparation method comprises the following steps of: (1) blending the following components by mass percent: 33.76-43.96% of Mg, 18.42-23.98% of B2O3, 16.89-22.00% of ZrO2 and 10.07-30.92% of NaCl; (2) uniformly mixing weighed raw material powders on a ball grinding mill; (3) placing uniformly mixed powder into a mould, and pressing the powder into a cake blank at the pressure of 15-30MPa; placing an ignition agent into a copper crucible in a reaction kettle, and then placing the cake blank on the ignition agent; introducing argon into the reaction kettle at room temperature; turning on a heating switch, exhausting again when temperature in the reaction kettle is increased to 180-220 DEG C, and then introducing 1.5-3MPa argon; and combusting the ignition agent when the temperature in the reaction kettle is increased to 250-300 DEG C, initiating a self-propagating combustion reaction of the blank by virtue of heat produced by combustion of the ignition agent, and turning off the heating switch at the moment until all the materials react completely and are converted into a product containing TiB2 blocks; and (4) taking out the product and grinding the product into powder, then leaching TiB2 with hydrochloric acid, and carrying out vacuum drying to obtain TiB2 ultrafine powder.

The invention discloses a milk making method of an easy-cleaning soybean milk machine. The soybean milk machine comprises a water tank, a crushing container, a water filling pipeline, a milk draining pipeline, a milk cooking cup, a crushing device, a first control switch and a second control switch. The method comprises the following steps of: controlling the second control switch to be switched on, introducing water of the water tank into the crushing container through the water filling pipeline, switching off the second control switch after a preset amount of water is filled, and starting the crushing device to crush materials in the crushing container; after crushing, controlling the first control switch to be switched on, draining milk into the milk cooking cup through the milk draining pipeline, and switching off the first control switch; and switching on the second control switch once again, adding a small amount of water into the crushing container, switching off the second control switch, starting the crushing device, draining water into the milk cooking cup after stirring, circularly performing the step for certain times, and ending milk making. The invention soybean milk machine has the advantages of convenience for cleaning, full absorption of residual nutritional ingredients of soybean milk and increase of milk making efficiency.

The invention discloses a cleaning and antirust agent for secondary processing of casting parts and a preparation method thereof, and the cleaning and antirust agent has simple cleaning process, high operation efficiency, standard cleaning quality and capability to meet the antirust requirements of preparing process. The agent consists of the following raw materials by weight: 2-5% of potassium hydroxide, 3-6% of sodium hydroxide, 15-20% of sodium carbonate, 10-20% of sodium metasilicate pentahydrate, 10-20% of sodium tripolyphosphate, 10-20% of sodium nitrite, 1-1.5% of osmotic agent, 2-6% of nonionic block polyether surfactant, 2-6% of special surfactant for dewaxing fluid, and 4-6% of antifoaming agent. According to the preparation method of the agent, the above raw materials are gradually added into a mixer in order. The adding of each material is associated with 10-15min of stirring, and when the raw materials are all added, at least 30min are needed to stir the materials continuously.

The invention discloses a water-soluble biodegradable cleaning agent and a cleaning application method of the water-soluble biodegradable cleaning agent. The water-soluble biodegradable cleaning agent comprises, by weight, 1%-15% of organic acid, 5%-20% of a surface active agent, 0.5%-1% of a stabilizer and 78%-79.5% of water. According to the cleaning application method of the water-soluble biodegradable cleaning agent, cleaning liquid containing the water-soluble biodegradable cleaning agent is used for ultrasonic cleaning of parts to be cleaned. According to the water-soluble biodegradable cleaning agent and the cleaning application method of the water-soluble biodegradable cleaning agent, the non-toxic food-grade biodegradable non-strong acid is adopted, the wetting performance, the permeability, the emulsibility, the dispersity, the capacity-increasing performance and the like of the water-soluble biodegradable cleaning agent are utilized, corresponding ultrasonic cleaning equipment is adopted in cooperation, under the mutual synergistic interaction of chemistry and machines, rust, oxides, polishing paste and all kinds of oil stains attached to the surfaces of metal, plastics and ceramics are washed away in a one-off manner; and in this way, traditional acid pickling technologies and the cleaning concept that oil removal, wax removal and oxide removal are executed separately are broken through, the cleaning process is shortened, time and energy are saved, cost is reduced, the safety of the environment and the safety of operators are guaranteed, and the effect of environment-friendly, efficient, energy-saving and safe enterprise production is achieved in real sense.

The invention relates to the technical field of test tube washing equipment and discloses a test tube washing device for a chemical laboratory. The test tube washing device comprises a washing water tank. The top of the washing water tank is fixedly provided with a drive tank. The top of the drive tank is fixedly provided with a drive motor. The outer side of the washing water tank fixedly communicates with a water conveying capillary tube. An inner cavity of the washing water tank is rotationally connected with a water conveying cylinder. The bottom of the water conveying cylinder fixedly communicates with washing tubes. The bottom ends of the washing tubes penetrate and extend into the bottom of the washing water tank. According to the test tube washing device for the chemical laboratory, by arranging an adjusting gear and rotating an adjusting handle, the height of the washing tubes can be adjusted to be inserted into test tubes, by cooperating with washing holes, clean water can flow into the multiple test tubes at the same time, the problems that according to an existing test tube washing device for the chemical laboratory, after chemical experiments are completed, it needs toadd water to the used test tubes to wash the used test tubes one by one, the washing process is tedious, the labor intensity is large, and the washing efficiency is low are solved, and the washing efficiency is effectively improved.

The invention discloses aqueous cleaning low-temperature welding paste and a preparation method thereof. The welding paste comprises the following components in percentage by weight: 85 to 90 percent of soldering alloy powder, and 10 to 15 percent of scaling powder, wherein the soldering alloy powder consists of the following components in percentage by weight: 36 to 44 percent of Pb, 18 to 22 percent of Bi and the balance of Sn; and the scaling powder is formed by mixing 2 to 10 weight percent of active agent, 1 to 10 weight percent of pasting agent, 20 to 30 weight percent of wetting agent, 2 to 10 weight percent of thixotropic agent, and 50 to 70 weight percent of solvent and the total percentage of all components is 100 percent. The welding paste is suitable for various welding processes, is high in welding speed, does not damage components, does not contain halogen and does not have corrosiveness, and residues are few after welding.

The invention relates to the technical field of chemical engineering, and particularly relates to a production method for calcium hydrogen phosphate. A calcium hydrogen phosphate product is prepared by reacting calcium oxide with a certain amount of water to form a calcium hydroxide solution; then reacting the calcium hydroxide solution with urea phosphate under stirring; controlling a pH value at 5.5-6.5; reacting for 5-20 min under stirring continuously and terminating the reaction. By adopting urea phosphate as a direct resource of phosphorus in the calcium hydrogen phosphate product, processes of removing impurities such as metal ions and fluorine in a process for producing feed level calcium hydrogen phosphate by using wet-process phosphoric acid are omitted; phosphorus utilization rate in the whole process is high; removal of a lot of wastes is prevented; and production cost of calcium hydrogen phosphate is reduced. In the obtained calcium hydrogen phosphate product, phosphorus content is 16.8-17.3%; calcium content is 20.35-22.2%; and fluorine content is 0.012-0.023%. The obtained calcium hydrogen phosphate product can fully meet the standard of feed level calcium hydrogen phosphate.

The invention provides a cleaning technology of a generator rotor water cooling system. The generator rotor water cooling system is washed through forward and backward circulation washing and is subjected to the processes of system preheating, alkaline washing, water washing after alkaline washing, slow release in advance, acid pickling, water washing after acid pickling, pre-filming and water washing after pre-filming, so that the generator rotor water cooling system is washed. Compared with the prior art, the cleaning technology has the advantages that scale and corrosion deposition product copper oxide of the inner surface of a hollow core copper conductor of a rotor are removed through chemical cleaning, the water-passing capacity of the hollow core conductor is recovered, the heat exchange efficiency of the conductor is improved, the operation temperature and the temperature difference of a rotor coil are reduced, and the operation safety of a generator is guaranteed; the cleaning rate of the corrosion product of the hollow core copper conductor of the rotor of the generator is over 99%, and the phenomenon that due to the fact that cleaning is not thorough, secondary corrosion is caused is avoided; the technology is simple, cost is low, and the discharged washing water is discharged without pollution; energy consumption of a power plant is reduced and large economic benefits are generated.

The invention relates to an on-line outer-burr eliminating technique for an ERW welding pipe, in particular to a method for a welding pipe welding-seam burr eliminating technique, and the method is especially suitable for the outer burr one-line elimination of a production line of the ERW welding pipe with a large caliber. An outer-burr scoring device, an outer-burr chipping device, an outer-burr milling device, a scoring roller, a chipping device, a used milling device, a standby milling device, a matched regulating device, a carrier roller, a press roller and a power system are sequentially arranged behind an extrusion stand on the production line of the ERW welding pipe to execute combined processing such as scoring, chopping, chipping and milling for the outer burr of a welding seam, thereby the invention can realize the function of the full-length continuous elimination of the outer burr of a welding seam in real time and achieve the purpose of the reliable and thorough on-line elimination of the outer burr of a welding seam. Furthermore, the invention not only can enhance the operating efficiency of a machine set, but also can improve the finished product ratio of the production line of the ERW welding pipe.

The invention discloses a liquid wax used for polishing bonding sheets as well as a preparation method thereof and the technique of the polishing bonding sheets. The liquid wax comprises the components (counted according to the weight portions of 10,000g) as follows: 662.3 to 665.7 portions of polyethylene glycols, 198.5 to 201.5 portions of paint flake, 548.7 to 551.2 portions of isopropanol, 307.0 to 309.7 portions of ammonia with a concentration of 25 percent, 2347.8 to 2353.4 portions of de-ionized water of 18 M as well as 5913.1 to 5940.8 portions of 8030 resin; each component is poured into a wax barrel according to the sequence and weight portions in turn and the mixture is slowly mixed through magnetic stirring, thus obtaining the liquid wax; the liquid wax can ensure the uniformity of the wax liquid, the consistency of viscidity as well as high polishing speed and is suitable for the production demand in batch; besides, the surface quality of a polishing sheet is good.

The invention discloses cleaning-free lead-based high-temperature soldering paste and a preparation method thereof and belongs to the technical field of hybrid integrated circuits. The soldering paste is prepared from, by weight, 85%-90% of brazing filler metal alloy powder and 10%-15% of brazing flux. The brazing filler metal alloy powder is prepared from, by weight, 15.5%-16.5% of Sn, 7.0%-8.0% of Sb, 0.8-1.2% of Ag and the balance Pb. The brazing flux is prepared from, by weight, 5%-10% of activator, 5%-10% of paste forming agent, 20%-30% of wetting agent, 5%-10% of thixotropic agent and 40%-65% of solvent. The cleaning-free lead-based high-temperature soldering paste is prepared through the steps of brazing filler metal alloy smelting, brazing filler metal alloy powder preparation, brazing flux preparation and soldering paste preparation. The soldering paste is high in melting temperature, has good wettability for a metal coating, and is good in brazing manufacturability, long in working life and suitable for soft brazing of electronic device silver cladding, gold cladding and copper.

The invention provides a process and system for cleaning waste residues in quarries and building sand and belongs to building waste residue cleaning processes and systems. The cleaning process comprises the following steps: 1), enabling sand stones to enter a pool; 2), enabling clear water to enter the pool; 3), stirring; 4), discharging mud water; 5), recycling clear water; 6), recycling sand stones; 7), cleaning mud; the cleaning process comprises a sand stone cleaning device (1), a mud sedimentation device (2), a clear water recycling device (3) and a material recycling device (4). The cleaning process has the advantages as follows: only 1-3 pools, one turbine stirrer and one belt conveying device are required, repeated cleaning can be carried out until rinsing, one-time cleaning can be completed by 3-5 minutes only, and water for cleaning can be used repeatedly after being purified; the cleaning process is simple, and low in water consumption, and can efficiently reduce silt content of sand stones with high quality, meanwhile, stone powder in the waste residues in quarries is retained fully, waste residues in the quarries and building sand can be cleaned in batches and industrial production is realized.