MANUFACTURING METHOD OF COMPOSITE MAGNESIUM-SILICATE PROPPANT, AND PROPPANT ITSELF Russian patent published in 2013 - IPC C09K8/80 C04B35/622 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry, and namely to the manufacturing procedure of ceramic proppants intended to be used as propping agents at production of oil or gas using the formation hydraulic fracturing method - FHF. In the manufacturing method of composite magnesium-silicate proppant from iron-containing raw material, which involves preparation of initial charge components, their grinding, granulation and annealing, at the grinding stage there introduced to the charge with iron content in terms of Fe₂O₃ of at least 4 wt % is mixture of sodium silicofluoride and colemanite, which is crushed to the size of at least 2 mcm in quantity of 0.12-0.6% of the charge weight, at the following content of the above components, wt %: colemanite 0.02-0.2, sodium silicofluoride 0.1-0.4, and annealing is performed at the temperature below Fe₃O₄↔Fe₂O₃ inversion temperature at annealing in oxidising atmosphere and below Fe₃O₄↔FeO inversion temperature at annealing in reducing atmosphere. Magnesium-silicate proppant is obtained by means of the above method. Invention is developed in dependent claims.

EFFECT: stable magnetic properties.

5 cl, 3 ex, 3 dwg