METHOD FOR NON-EXPLOSIVE DESTRUCTIVE MEANS OBTAINING Russian patent published in 2005 - IPC

FIELD: mining industry, particularly use of explosive substances based on calcium oxide for developing decorative rock, for safe breaking building structures and objects taken out of service.

SUBSTANCE: method involves reducing limestone to powder state, mixing powder with fine solid fuel; granulating thereof; high-temperature roasting the obtained granules in bed by penetration method under temperature of not less than 1500°C; grinding roasted granules to obtain the following fractional composition (% by weight): particles with 0.1 mm or lesser size- 30-50, particles with 0.1-0.25 mm size - 25-40, particles with 0.25-0.5 mm size - 15-25, particles with 0.5 mm and greater size - up to 20. To provide increased expansion clinker binding agent, for instance Portland cement taken in amount of 10-30% of roasted product mass is added to roasted granules.

EFFECT: improved quality, increased inner friction of hardening mix, provision of breaking force exceeding 180 MPa and 1.5-2 fold cost reduction in comparison with prior art method using rotary furnaces.

2 cl, 1 tbl