Abstract: A perpendicular-standing rotary filter for the continuous separation of coarse particles from a suspension. The rotary filter has an upper part which includes a cylindrical filter basket disposed centrally in a cylindrical jacket. A chamber for the filtered material is formed by the space between the cylindrical jacket and the filter jacket of the filter basket. At least one centrally-located rotable scraper is continuously forced by means of a compression spring against the filter jacket. The rotary filter also has a lower part which includes a sump chamber in which at least one rotable stirring sheet is centrally disposed and which continuously presents (or always contains) one outlet for the filtered material and one outlet for the separated material. Preferably at least three scrapers are disposed in the filter basket. Also, preferably at least three stirring sheets are disposed in the sump chamber. The rotary filter can be a pressure filter.

Abstract: The high-temperature lubricant for the hot-working of metals which comprises (a) 10 to 90 percent by weight of graphite, (b) 2 to 45 percent by weight of an alkylene homopolymer or copolymer, and (c) 0.5 to 8 percent by weight of a dispersing agent. The lubricant is solid at room temperature. The high-temperature lubricant is applied in the form of an aqueous solution which includes 5 to 80 percent by weight of the solid high-temperature lubricant. The process of production and use of the high-temperature lubricant.The high-temperature lubricant for the hot-working of metals which comprises (a) 35 to 90 percent by weight of graphite, (b) 2 to 60 percent by weight of an alkylene homopolymer or copolymer, (c) 0.2 to 8 percent by weight of an auxiliary suspension agent, and (d) 2 to 40 percent by weight of a film stabilizer. The lubricant is applied in the form of an aqueous solution which includes 5 to 80 percent by weight of solid lubricant. The lubricant is used at temperatures of around 900.degree. C.