4 results about "Revolutions per minute" patented technology

The invention provides a method for removing arsenic and antimony in a water body by using active base metal replacement. The method comprises the following steps: regulating the pH value of wastewater containing arsenic and antimony to be 0-3 by using an acid, adding active base metal powder and a complexing agent, stirring and reacting at a stirring speed of 100-600 revolutions per minute, and replacing at the temperature of 10 to 80 DEG C for 10-120 minutes, wherein in the wastewater containing arsenic and antimony, the content of As (III) is 0.1-10g/L, and the content of Sb (III) is 0.1-25g/L; the mass amount of the active base metal powder is 5-100g/L according to the volume of the wastewater; the mass amount of the complexing agent is 0.5-5g/L according to the volume of the wastewater; and the active base metal refers to one or a combination of more than two in iron, zinc and iron-zinc alloys according to an arbitrary ratio. According to the method disclosed by the invention, arsenic and antimony in the water body are effectively removed, toxic arsenic hydride and antimony hydride gases are avoided, and the process is simple, economical and environment-friendly.

The invention belongs to the technical field of lubricants, and relates to a functional rolling liquid of water-based nano Cu and a preparation method of the functional rolling liquid. The functional rolling liquid is used for lubricating a rolled copper foil in a rough rolling process. The preparation method comprises the following steps: by taking nano Cu with good anti-corrosion and anti-rusting performance as an extreme pressure agent and taking methylbenzene, polyethylene glycol and sodium dodecyl benzene sulfonate as a dispersing agent, sequentially adding deionized water, the sodium dodecyl benzene sulfonate, the methylbenzene, the polyethylene glycol, triethanolamine, oleic acid, aniline and mercapto-1,3,4-thiazole and putting into a reaction kettle at a revolving speed of 80 to 120 revolutions per minute, heating and stirring, adding the nano Cu when a temperature reaches 70 DEG C to 80 DEG C, carrying out heat preservation and further stirring for 45 to 60 minutes, then stopping the heating and further stirring until reaching a room temperature so as to obtain a turbid suspension liquid in red brown, namely, a required water-based rolling liquid. As the water-based rolling liquid is used, the pollution caused by the traditional cold-rolling emulsified oil is reduced, and the slow-release anti-rusting performance of a rolled copper plate/strip can be obviously improved. Thus, the rolled copper plate/strip is good in surface quality and long in anti-corrosion period.