摘要:
Ce procédé de Traitement Intégré des Effluents liquides de Décapage a pour objet un procédé de traitement des eaux provenant du rinçage de pièces métalliques ayant subi un décapage par un acide fort. Ce procédé est caractérisé par le fait qu'il comporte les étapes suivantes:
a) on met en contact ladite eau de rinçage avec une résine cationique; b) on élue la résine chargée au moyen d'une solution au moins quatre fois normale de l'acide fort utilisé pour le décapage.
摘要:
A machine (100) for cleaning painting tools and treating tool cleaning water comprises a hopper (5) to collect cleaning water from a sink (9) and/or an automatic cleaning device (10). A flocculation process takes place in the hopper to separate flakes from cloudy water. The machine further comprises a clarification unit (11) to subject the cloudy water to a clarification process so that it may be reused for cleaning tools. [Fig. 1]
摘要:
A method for pickling a steel plate having a first steel plate portion and a second steel plate portion which is connected to a tail end of the first steel plate portion and which requires a longer time for pickling than the first steel plate portion when pickled under the same condition includes: a step of pickling the steel plate by immersing the steel plate in an acid solution in at least one pickling tank while conveying the steel plate; a step of circulating the acid solution, through a circulation line connected to any of the at least one pickling tank, between the pickling tank and an oxidizing device disposed in the circulation line; a step of oxidizing Fe 2+ in the acid solution to Fe 3+ by the oxidizing device using a gaseous oxidant; and a feeding start step of, upon switching from pickling of the first steel plate portion to pickling of the second steel plate portion, starting feeding of a liquid oxidant for oxidizing Fe 2+ in the acid solution to Fe 3+ to any of the at least one pickling tank or to the circulation line.
摘要:
A novel process for treating pickling acid residue and recovering sulfates and nickel therefrom has been developed. By lowering the pH of a magnesium compound slurry to 4-5.5 with sulfuric acid containing pickling acid residue in the presence of ammonium sulfate, both magnesium sulfate and nickel sulfate are solubilized. Magnesium sulfate and nickel sulfate solution is separated from the solids by filtration and an iron hydroxide and chromium hydroxide residue is obtained as a precipitate. Magnesium sulfate and nickel sulfate are then separated from the solution.
摘要:
The present invention relates to a method for processing a metal containing material, comprising at least one non-iron metal component and at least one iron component, wherein the metal containing material is at least partly separated into a solid iron oxide component and into at least part of the at least one non-iron metal component, the method comprising the following steps: -- in a precipitation step, at least part of the at least one non-iron metal component is precipitated in an acid solution, the acid solution comprising the metal containing material and an added iron component, being added to the acid solution and comprising either a further iron component and/or an iron component in the form of an iron salt component, and, by means of the precipitation step, at least part of the at least one non-iron metal component is removed from the remaining acid solution, remaining after the precipitation step and comprising either at least part of the at least one iron component and/or at least part of the added iron component, -- in a hydrolysis step, the remaining acid solution is at least partly hydrolyzed, at least partly yielding a solid iron oxide component, an acid component, and optionally a remaining part of the iron salt component.
摘要:
A heating module for use in a pyrohydrolysis reactor includes a fuel distribution system in fluid communication with a fuel source and a carrier element having a plurality of built-in coupling units. A coupling unit of the plurality of coupling units includes a coupling element, and the coupling element of the coupling unit is in fluid communication with the fuel distribution system. The heating module further includes a plurality of burner units arranged on the carrier element. A burner unit of the plurality of burner units includes a connector element and a burner element. The connector element is in fluid communication with the burner element. The connector element is reversibly connected to the coupling element of the coupling unit. The connector element is in fluid communication with the coupling element of the coupling unit.