Production of Cubiform Crushed Stone is an Innovative Stage of Development of Building Materials Industry

It is shown that the increase demand for cubiform crushed stone in the beginning of the 2000s led to the complication of technological lines both due to the installation of additional, import mainly, equipment and increase in the number of internal return cycles and, as a consequence, to significant growth of capital and energy costs for production of crushed stone as well as to the increase in crushing screenings of 0-5 mm fraction. The construction of a mathematical model of solid materials fracture in the crushing chamber made it possible to theoretically sub- stantiate the method of forced self-crushing of materials inside the own layer under the effect of vibro-impulse compression and simultaneous shear when dosing the effect force on the material layer according to the value of strength limit of defect surfaces of its structure. On this scientific base, REC «Mekhanobr-Tekhnika» has developed and produces in a wide structural and dimension-types range the cone inertial crushers КИД® in which the rigid connection between cones was replaced by dynamic one. Technical characteristics of the crushers КИД-1500 and КИД-1750 (KID), which make it possible to receive the crushed stone of a 25–60 mm fraction for railway ballast, are presented. The technological scheme of the operating line at the Turgoyak Mine Management in the Chelyabinsk Region, where the rotor crushed I-1312, was replaced with KID-1500 is shown. Crushing is carried out in two stages with the production of 40–70 mm, 20–40 mm, 5–20 mm commercial fractions of crushed stone. The output of screenings was reduced by 40–50%, the lifetime of crushing linings increased by 60–70%.

I.D. USTINOV¹, Doctor of Sciences (Chemistry);
A.D. SHULOYAKOV², Candidate of Sciences (Engineering) 

¹ Research and Engineering Corporation “Mekhanobr-Tekhnika” (3, 22 liniya, V.O. 199106,St. Petersburg, Russian Federation) 
² OOO «Interstroyproekt» (128A, Nevsky Prospect, 191036, St. Petersburg, Russian Federation)

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