Device for continuous grouting and cleaning of metal powders

 

(57) Abstract:

The invention relates to equipment for the chemical coating of metal powders with subsequent purification from the reaction products using ultrasonic vibrations and can be used in the production of environmentally friendly composite materials in the metallurgical and electrical engineering, and mechanical engineering. The purpose of the invention: the creation of the installation, providing a continuous process of grouting and cleaning powders that will increase the productivity of the process 2 to 3 times with the same energy consumption; the production of metal powder with a uniform coating over the entire surface of the powder particles, ensuring a quality finished cleaning powder from by-products of chemical reactions. The inventive device includes an ultrasonic generator with a Converter, volnovedushchie system and the reaction bath and differs in that volnovedushchie system consists of sets of waveguides longitudinal vibration, and the waveguide longitudinal vibrations made in the form of rigidly and consistently interconnected rods, and between the waveguides continue the tub I is further provided with a drain hole and devices for the continuous feed powders and the reaction liquid. 1 Il.

The invention relates to equipment for the chemical coating of metal powders with subsequent purification from the reaction products using ultrasonic vibrations and can be used in the production of environmentally friendly composite materials with metals and electrical engineering, and mechanical engineering.

A device for ultrasonic cleaning steel strip moving in a process stream and passing through an ultrasonic bath, made in the form of a vertical pipe of large diameter with a hemispherical cap on its lower end, and inside the tube are blocks magnetostrictive transducers [1]

The device has a large size, a large number of magnetostrictive transducers, requires significant energy consumption, thus it cannot be used for cleaning small parts and powder materials.

Closest to the invention to the technical essence is ultrasound unit for the cementation process (cladding) from aqueous solutions, including temperature-controlled reaction bath bottom, made in view of the e ultrasonic field on the process of cementation 1.5 times reduces the processing time compared with mechanical stirring. This setting can be used for further purification the product [2]

However, the known device cannot be used for carrying out a continuous process of grouting and cleaning due to the need for periodic download of source materials, unloading the product and discharge the spent solution. In addition, the device is not able to handle large amounts of powder, so as to increase the quantity of powder and solution reduces the efficiency of the device (the oscillations are damped diaphragm), so in order to increase the efficiency of the device, it is necessary to increase the acoustic power, which requires a significant increase in the consumption of electricity consumed. In addition, because of the nature of the vibrations of the diaphragm is impossible to create a uniform ultrasonic effect in the volume, which reduces the quality of the cementation process and cleaning (reduces the uniformity of the coating metal particles and degrades the degree of purification of the finished powder from impurities and by-products of chemical reactions).

Objectives of the invention are the following: the creation of the installation, providing a continuous process of cementation and achillodynia metal powder with a uniform coating over the entire surface of the powder particles, ensuring proper treatment of the finished powder from by-products of chemical reactions.

For this known device, comprising ultrazvukovy generator with Converter, volnovedushchie system and the reaction bath, in accordance with the invention has volnoslushayuschim system consisting of sets of waveguides longitudinal vibration and bending waveguides fluctuations, and the waveguide longitudinal vibrations made in the form of vertical rigidly and consistently interconnected rods, and between the waveguide longitudinal vibrations in planes perpendicular to their axes, are waveguides Flexural vibrations. In addition, the reaction bath is further provided with a drain hole and devices for the continuous feed powders and the reaction liquid.

The invention consists in the fact that the experimental and calculated by matched sets of waveguides longitudinal and Flexural vibrations. Thus, the waveguide longitudinal vibrations made in the form of vertical rods, the length of each of the waveguides is a multiple of /2, where is the length of the elastic waves in the material of the waveguide, and the waveguide resonant length rigidly and consistently connected perpendicularly axis of the waveguide longitudinal vibrations. Described volnovedushchie system longitudinal bending vibration is installed in the tub-reactor filled with processed powder and solution for the cementation process or water for the cleaning process. Between the oscillating plate in the bath-reactor filled with liquid, are formed acoustic currents that keep the powder particles in suspension, which reduces the speed of their fall. In addition, due to vibrations of plates in the solution occurs intense cavitation, which cleans the powder particles from impurities. Thus, the new distinctive features of the prototype signs provide the solution of the tasks, which gives grounds to believe that the proposed solution meets the criteria of the invention of "novelty" and "inventive step".

The drawing shows an ultrasonic device for grouting and cleaning powders.

The device has an ultrasonic generator with a magnetostrictive transducer and the hub 1, the waveguides of the longitudinal oscillations of the waveguides 2 and Flexural vibrations 3, reaction 4 bath with drain hole 5 bin for powder 6 and the funnel for solution or water 7.

The iron powder from odnovremenno in the tub excited ultrasonic vibrations. The powder particles passing through the bath reactor, perform complex movements, gradually dropping down to the drain hole and together with waste solution derived from the bath. During the passage through the bath-reactor process substitution reactions of particles of iron powder is completely covered with a uniform layer of copper, and the solution is produced. The new batch of powder and fresh solution is continuously fed to the bath reactor.

DEVICE FOR CONTINUOUS GROUTING AND CLEANING of METAL POWDERS containing ultrasonic generator with a Converter, volnovedushchie system and the reaction bath, characterized in that volnovedushchie system consists of sets of waveguides longitudinal vibrations made in the form of rigidly and consistently interconnected rods and located between the planes perpendicular to their axes, waveguide bending vibration, and the reaction bath is made with drain hole and with devices for continuous feeding of powders and the reaction liquid.

 

Same patents:

The invention relates to metal coating

FIELD: chemistry.

SUBSTANCE: invention relates to applied chemistry, namely, to methods for obtaining nickel coating on materials from carbon fibre. The method includes metallisation of fibre by chemical application of nickel coating in metallisation solution. Prior to metallization material is degreased, submerged into metallisation solution with temperature of 65-95°C and cathode polarisation of fibre during 30-60 sec with current density of 1-1.5 A/dm2 is carried out.

EFFECT: simplified technology of chemical metallisation of materials.

2 ex

FIELD: machine building.

SUBSTANCE: invention refers to machine building and can be used for production of chemical coating on parts out of materials operating under excessive wear, high pressure and at presence of aggressive mediums. With successive solving of components a solution is prepared; further surfaces are chemically or electric-chemically treated; then there is performed chemical application of coating from solution. This is followed with cold and hot water washing and drying. Nano diamonds with dimension of diamond aggregates in the range of 0.004-0.1 mcm at amount of 2-20 g/l are introduced into solution for chemical application of coating. In specific cases of the invention nano diamonds are introduced into solution in form of hydrosol or powder, or suspension.

EFFECT: upgraded physic-chemical properties of coating.

2 cl, 8 tbl, 4 ex

FIELD: metallurgy.

SUBSTANCE: in compliance with proposed method, first layer of metal coating is applied on the entire matrix patterned surface to apply, at least, one mote metal coating to predefined surface sections. Note here that blanch of metal coating first layer differs from that of the next coating.

EFFECT: well-patterned forming die surface.

11 cl, 2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to sealing of micro holes in metallic coating produced by chemical reduction. This process includes the application of metallic coating ply on substrate by chemical reduction comprises defects like micro holes which allow fluid communication between substrate and ambient medium. Ply of setting epoxy sealant is sprayed over said metallic coating ply to fill aforesaid defects. Note here that said setting sealant features viscosity of 20-1200 cP at ambient temperature. Setting of applied sealant is performed and notable portion of applied sealant cover ply is removed to get the article. This article includes the metallic coating ply on substrate produced by chemical reduction with no defects like micro holes which allow fluid communication between substrate and ambient medium.

EFFECT: higher mechanical strength and protective properties, ease of processing.

10 cl, 5 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of obtaining indium selenide (III), widely used in microelectronics for producing nuclear radiation detectors and creating solar radiation inverters as the basis for such material as copper diselenide (I) and indium CuInSe2. The solution for hydrochemical precipitation of a thin semiconductor film of indium selenide (III) contains an indium (III) salt, selenocarbamide, tartaric acid and sodium sulfite at the following concentrations of reagents, mol/l: indium (III) salt 0.01-0.15; selenocarbamide 0.005-0.1; tartaric acid 0.01-0.06; sodium sulfite 0.005-0.1. Due to the presence of such additives as selenocarbamide and sodium sulfite, the process kinetics and the precipitation conditions are modified in comparison with the prototype. Selenocarbamide is a source of selenide ions. Sodium sulfite acts as an antioxidant, preventing the selenocarbamide oxidation in the solution. Tartaric acid simultaneously complexes indium ions and increases the buffering capacity of the reaction mixture, maintaining the pH of the solution at a certain level.

EFFECT: layers obtained from said precipitation solution have good adhesion to substrate material and a mirror surface, their thickness is equal to 300 nm.

1 tbl, 2 ex

FIELD: application of metallic; chemical copper plating of metal and dielectric parts, mechanical rubber goods in particular.

SUBSTANCE: proposed aqueous solution contains, g/l: copper sulfate, 4-5; potassium sodium tartrate (Rochelle salt), 20-22; sodium sulfate, 15-16; sodium hydroxide, 10-12; polyvinyl pyrrolidone, 2-3; ammonium benzoate, 0.05-0.1; formalin, 20-22.

EFFECT: enhanced elasticity of copper coat; enhanced adhesion with surface to be coated; increased rate of reaction.

2 tbl, 1 ex

FIELD: application of metallic coatings, possibly chemical deposition of composition type copper coatings onto steel parts that may be used in electric, chemical industry branches, in machine engineering.

SUBSTANCE: solution contains copper sulfate, sodium potassium tartrate, sodium sulfate, sodium hydroxide, Formalin, Aerosil and 20% aqueous solution of polyacrylamide at next relation of ingredients (g/l): copper sulfate, 4 - 5; sodium potassium tartrate, 20 - 22; sodium sulfate, 15 - 16; sodium hydroxide, 10 - 12; Formalin, 20 -24; Aerosil, 0.2 - 0.3; 20% aqueous solution of polyacrylamide, 0.5 - 3.

EFFECT: improved wear resistance, corrosion resistance in sea atmosphere due to increased thickness of coating, lowered friction factor.

1 ex, 2 tbl

FIELD: technological process.

SUBSTANCE: invention is related to methods of copper coating of plastics, in particular, polymer composition materials on the basis of carbon fibers and may be used in manufacture of furniture fittings, household appliances and utensils, in automobile and radio industries. Method includes preparation of polymer composition material surface - cleaning, degreasing, immersion and soaking of polymer composition material for 40 - 60 minutes in acid solution of electrolyte with the following composition, g/l: copper sulfate 195 - 235, concentrated sulfuric acid 50 - 60, sodium chloride 0.07 - 0.15 and electrochemical depositing of copper in the same electrolyte at temperature of 20 - 24°C, current density of 5.0 - 6.0 A/dm2 for 5-10 minutes, pH of electrolyte - 1.

EFFECT: allows to increase purity of productivity, to simplify copper coating process, to increase environmental safety and economic efficiency of production.

2 dwg, 2 tbl, 13 ex

FIELD: technological processes.

SUBSTANCE: invention is related to technology for production of metalised woven and nonwoven materials, and may be used for production of catalysts, and also for production of decorative and finishing materials. Method includes previous chemical activation of coated material surface, using as activator glyoxal acid and/or oxalic acid. Then chemical metallisation is carried out, which is realised from solution containing bluestone. Stabiliser used is tetraethylene glycol, and reducer - glyoxal. Sodium hydroxide is used in solution to maintain required acidity.

EFFECT: invention provides for production of metalised dispersed woven and nonwoven materials using simplified technology, with simultaneous cheapening and provision of production safety due to use of proposed ingredients and their certain ratio.

2 ex

FIELD: process engineering.

SUBSTANCE: invention relates to metal-working and can be used in metallurgy, machine building and other industrial branches for processing wire, strips, tubes and other various-section products. Proposed method comprises, prior to applying copper from copper-containing solutions, coppering and processing products after coppering. Note here that at least a part of product processing process, prior to coppering, is performed by at least single vacuum-arc processing of a product-cathode, and at least with the help of electrode-anode. Note here that said vacuum-arc processing is performed in conditions of product cleaning without oxidising its surface in conditions of cleaning with oxidising at least a part of product surface, while blue copperas solution represents copper-containing solution.

EFFECT: perfected production of coppered metal, higher efficiency and coppered products transfer rate, higher quality of cleaning.

5 cl, 4 dwg

FIELD: metallurgy.

SUBSTANCE: solution contains, wt %: copper sulphate 5-10, sulphuric acid 8-10, ethylene-diamine-tetra-acetic acid and/or its sodium salts 0.01-6 and water - the rest.

EFFECT: strong adhesion of coating to wire, increased density and uniformity of coating, reduced porosity, and increased applicability of solution for copper coating during 60-70 days.

1 tbl, 1 ex

FIELD: construction.

SUBSTANCE: method includes application of chemically pure copper onto the surface of a steel reinforcement rod and manufacturing of reinforced concrete structures containing chemically pure copper introduced into the area of power contact of a reinforcement rod with concrete, besides, application of the chemically pure copper is carried out by electrodeless plating from a solution of a copper-containing salt.

EFFECT: simplified technological process, higher strength properties of a reinforced concrete structure due to a metal lubricant, increased production safety.

6 cl

FIELD: process engineering.

SUBSTANCE: invention relates to powder metallurgy and may be used to increase thermal stability of titanium hydride powder. Proposed method consists in making diffusion barrier coating on surface of titanium hydride powder particles applied from solution that contains, in g/l: copper sulphate 15-35, sodium-potassium tartrate 60-170, sodium hydroxide 15-50, sodium carbonate 3-35, formalin 6-16, sodium thiosuplhate 0.003-0.001, nickel chloride 2-3. Titanium hydride powder is filled with fresh solution, mixed by magnetic mixer, filtered, rinsed and dried.

EFFECT: 60%-increase in thermal decomposition temperature, reduced hydrogen release rate.

3 dwg, 1 tbl

FIELD: manufacturing technology.

SUBSTANCE: invention relates to methods for production of flexible printed circuit boards, connection cables, trains, microcircuits. Method for preparation of polyimide surface for chemical deposition of copper coating is disclosed, which involves polyimide etching with aqueous solution of alkali, containing 150–250 g/l of NaOH or KOH, at temperature of 60±2 °C during 5–15 minutes with subsequent activation with water solutions of silver nitrate of composition 3–5 g/l for 10–15 minutes at room temperature.

EFFECT: proposed technology of chemical application of conductive coating is easier, more efficient and chemically and environmentally safer than known level of equipment.

1 cl, 7 ex

Up!