Abrégé

Provided is a passivation treatment agent for a hot-dip aluminum-zinc plated sheet, raw materials of which comprise 2 to 6 parts by weight of a water-soluble molybdate, 4 to 12 parts by weight of a water-soluble manganese salt, 50 to 100 parts by weight of an alkaline silica sol, and 50 to 100 parts by weight of a water-soluble organic resin. Also provided is a method for producing the passivation treatment agent for the hot-dip aluminum-zinc plated sheet, which includes the following steps of: dissolving the water-soluble molybdate and the water-soluble manganese salt in deionized water to form a solution, adding the alkaline silica sol into the solution and mixing uniformly, then adding the water-soluble organic resin and mixing uniformly, adjusting the pH value of the solution with phosphoric acid to 5-8. Also provided are the hot-dip aluminum-zinc plated sheet treated with the passivation treatment agent therefor and a passivation treatment method thereof.

Classes IPC  ?

• C23C 22/40 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p. ex. revêtement par conversion, passivation des métaux au moyen de solutions aqueuses au moyen de solutions aqueuses acides d'un pH < 6 contenant des molybdates, des tungstates ou des vanadates
• C23C 22/68 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p. ex. revêtement par conversion, passivation des métaux au moyen de solutions aqueuses au moyen de solutions aqueuses avec un pH compris entre 6 et 8

Abrégé

A coating composition is provided, the starting materials of which comprise nano SiO2, film-forming substance, film-forming aid, accelerator, acid, and water. The composition has pH of 3-9. A passivated zinc-plated material is also provided. The zinc-plated material comprises zinc-plated substrate and passivated coat adhered to the surface of the zinc-plated substrate, wherein the passivated coat is formed by curing the coating composition. The coating composition can impart to the zinc-plated material excellent corrosion resistance, water resistance, high temperature resistance, surface conductivity, and adhesion to the zinc-plated substrate. Additionally, the coating composition contains no Cr6+, and satisfies the requirement of EU RoHS Directive.

Classes IPC  ?

• C09D 5/08 - Peintures anti-corrosion
• C23C 22/05 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p. ex. revêtement par conversion, passivation des métaux au moyen de solutions aqueuses

Abrégé

Provided is a production method of vanadium oxide using ion-exchange to realize wastewater circulation, which belongs to the technical field of vanadium oxide extraction, and can not only obtain high quality vanadium product but also circulate and reuse vanadium extraction wastewater. The method comprises preparing raw material to be roasted, calcifying roasting, leaching, solid-liquid separating, ion-exchanging, vanadium precipitating, and removing ammonia by calcination or reducing to prepare vanadium oxide; where vanadium extraction wastewater is returned to the system for circulation and reuse after neutralization treatment with lime milk, and no wastewater discharge is realized. Vanadium recovery rate is improved, and production cost is reduced. By combining with other techniques, the method can also convert waste resulted from extraction into secondary resource for reuse, so as to realize clean production.

Classes IPC  ?

• C01G 31/02 - Oxydes

Abrégé

The present invention relates to a production method of vanadium oxide using extraction, and belongs to the technical field of vanadium oxide extraction. The technical problem to be solved in the present invention is to provide a clean vanadium oxide production method which can not only obtain high quality vanadium product but also circulate and reuse vanadium extraction wastewater. The inventive method comprises preparing raw material to be roasted, calcifying roasting, leaching, solid-liquid separating, extraction, vanadium precipitating, and removing ammonia by calcination or reducing to prepare vanadium oxide; where vanadium extraction wastewater is returned to the system for circulation and reuse after neutralization treatment with lime milk, and no wastewater discharge is realized. The invention improves vanadium recovery rate to make it higher than that of available processes, and reduces production cost. By combining with other techniques, the invention also can convert waste resulted from extraction into secondary resource for reuse, so as to realize clean production.

Classes IPC  ?

• C01G 31/02 - Oxydes

Abrégé

Provided is a clean production method of vanadium oxide, which belongs to the technical field of vanadium oxide extraction, and can not only obtain high quality vanadium product but also circulate and reuse vanadium extraction wastewater. The method comprises preparing raw material to be roasted, calcifying roasting, leaching, solid-liquid separating, vanadium precipitating with ammonium salt, and removing ammonia by calcination or reducing to prepare vanadium oxide; where vanadium extraction wastewater is returned to the system for circulation and reuse after neutralization treatment with lime milk, and no wastewater discharge is realized. Vanadium recovery rate is improved, and production cost is reduced. By combining with other techniques, the method can also convert waste resulted from extraction into secondary resource for reuse, so as to realize clean production.

Classes IPC  ?

• C01G 31/02 - Oxydes

Abrégé

Provided is a process for producing titanium tetrachloride using low-grade titanium raw materials. The process comprises adding the low-grade titanium raw materials into a furnace, heating the furnace to 420±40℃, continuously adding the low-grade titanium raw materials, feeding chlorine into the furnace to begin the reaction, controlling the temperature of the furnace at 600℃-700℃, collecting the gases containing titanium tetrachloride generated in the reaction, condensing the gases to obtain a titanium tetrachloride liquid and a tail gas, taking the reacted inert chlorination residues out of the furnace depending on the amount of the materials being added, and processing and discharging the remaining residue when the reaction is completed. The content of titanium carbide in the low-grade titanium raw materials is 6%-16%, and preferably 7%-12%.

Classes IPC  ?

• C01G 23/02 - Halogénures de titane

Abrégé

Provided is a hot-galvanized steel sheet with high adhesion between the coating and the steel substrate, it belongs to hot-galvanized steel sheet manufacturing field. The atomic concentration ratio Al/Zn of Al to Zn in the Fe-Al intermediate layer between the steel substrate and the zinc coating of the hot-galvanized steel sheet is 0.9~1.2. Г phase is not formed in the coating, δ phase is thinner, ξ phase is very little, and a major portion of the coating is comprised of η phase, the adhesion, scratching resistance and wear resistance of the coating are significantly improved.

Classes IPC  ?

• C23C 2/06 - Zinc ou cadmium ou leurs alliages
• C23C 2/40 - PlaquesBandes

Abrégé

A method of manufacturing V product utilizing fluidization technology and fluidization device comprises: calcining V slag with high Ca in a fluidized furnace, in which the weight ratio of CaO to V2O5 is 0.5-1.4, the average temperature in the fluidized furnace is 850-950℃, and the average residence time of the V slag in the furnace is 30-150 minutes; leaching calcined product in sulphuric acid; and producing V product from leach solution. Compared with methods which use rotary kiln or multi-chamber furnace as calcining devices, the method has high production efficiency, low energy consumption and high productivity, and it is easy to realize large-scale manufacture.

Classes IPC  ?

• C22B 1/10 - Procédés de grillage sous forme fluidisé
• C22B 3/08 - Acide sulfurique
• C22B 34/22 - Obtention du vanadium