TYRE GRINDING PLANT Russian patent published in 2007 - IPC B29B17/04 

FIELD: mechanical engineering; tire recycling.

SUBSTANCE: proposed plant is designed for grinding frozen tires or similar large-size articles made of relatively brittle materials, such as stone, concrete and others, with subsequent recycling or reprocessing into semi-finished. As problem of cleaning from tires of areas of not only megapolises but also small towns, rivers, water reservoirs and even national parks becomes really international, different methods and equipment for recycling tires are developed and widely used in industrially-advanced countries at out days, but tire cutting technology has found widest application which requires high energy consumption, large size and expensive equipment, high quality and, consequently, expensive tools and as a result, said "small problem" remains large problem in global scale. It should be mentioned than in the last years technical progress begins to show using cryogenic process making it possible to change vulcanized rubber from non-crushable into brittle, and, consequently, crushable material. However, slow-speed hydraulic pressure used in crushing of frozen tires are not only low-capacity ones, but are rather expensive equipment which require complex powerful oil pumping stations with installed power of electrical equipment from 50 kW and higher, and number of additional expensive equipment for subsequent fine-grinding of vulcanized rubber and synthetic and metal cord, for instance, radial-ply tires. Unfortunately, level of industrially-advanced countries makes it possible to solve any problem but at whet price is a commercial secrete, but as none of the companies and, possibly, none of scores of the companies "live from hand to mouth" and not without State subsidies, and things are not moving, problem of tire recycling is far from optimum solution remaining problem of XXI century. For global solution of the tire problem, physicochemical tire recycling technology is proposed with preliminary deep freezing of tires and subsequent fine grinding of vulcanized rubber by use of subproducts of cryogenic technology: hydrogen and oxygen at their stoichiometric relationship with obtaining of oxyhydrogen gas used for gas-explosion fine-grinding of vulcanized rubber without destruction of synthetic and metal cord with use of opposite pneumatic cylinders with grinding plates and tire placed between said plates.

EFFECT: reduced cost of tire recycling.

2 dwg