39results about How to "Poor uniformity" patented technology

A method for preparing ultra-fine cobalt blue material at low temperature. First, three cobalt tetroxide, aluminum hydroxide, zinc oxide and chromium oxide are mixed according to the general chemical formula Co1-xZnxAl2-yCryO4 to obtain reactants, wherein 0≤x<1, 0≤y≤2; secondly, add one or more of KOH, NaOH, KCl, NaCl, Li2SO4, Na2SO4 to the reactant and mix evenly to obtain a mixture; finally, calcinate the mixture at 800°C-1000°C for 1 -2 hours, grind the calcined product finely, wash and filter. The technical process and equipment of the invention are simple, easy to operate, cheap and easy to obtain raw materials, and low cost of colorant preparation. The pigment obtained by the preparation method of the present invention has the characteristics of good grain development, good color development, fine particle size, light agglomeration, good uniformity, etc., and at the same time, the introduction of salt can reduce the synthesis temperature.

The invention provides a plug-resistant electrical connector, which includes a jack fitting and a base, the jack fitting is installed in the base, the jack fitting includes a jack, a contact coil, and the butt end of the jack is arranged There is a blind hole, the contact coil is installed in the blind hole, the blind hole is closed to fix the contact coil in the blind hole, the contact coil is provided with a number of elastic claws, and the coating of the contact coil is gold-graphene composite coating , the plating of the socket is gold plating or gold-graphene composite plating. The invention provides a plug-resistant electrical connector. By electroplating a gold-graphene composite coating on the contact coil and optimizing the spring claw structure, the mechanical life of the socket assembly is improved, and the electrical connector is further improved. mechanical life.

The invention provides a double-helix device for recovering heavy metals from sludge by adopting an electrochemical removal method. The device comprises a helix-type electrochemical reactor, a cathode electrode, an anode electrode and an ion exchange membrane, wherein the helix-type electrochemical reactor is composed of an outer cylinder, a middle helix cylinder, an inner helix cylinder, a circular lower base plate, a helix-type opening upper base plate and a bracket; the area encircled by the inner helix cylinder and the circular lower base plate forms an anode chamber; the anode chamber is communicated with the area formed by the outer cylinder and the middle helix cylinder; the area formed by the upper layer inner helix cylinder, the middle helix cylinder and the helix-type opening upper base plate is a cathode chamber; the ion exchange membrane is adhered on the outer surfaces of the inner helix cylinder and the middle helix cylinder through a glass cement; a resource recovery pipe of the cathode chamber of the electrochemical reactor is positioned on the end plate of the cathode chamber; a feed pipe and a discharge pipe are symmetrically positioned on the outer side of the outer cylinder and are further connected with a booster pump. The double-helix device for recovering heavy metals from sludge by adopting the electrochemical removal method has the advantages of being good in economical efficiency, simple, and convenient and fast, high in processing efficiency and capable of separating and recycling heavy metals from sludge and the like.