Ceramic proppant with low specific weight
AssigneeILEM Research and Development Establishment
InventorsSergey Shmotev, Sergey Pliner
Life of this patent
Estimating the term…
Abstract
A precursor composition for the production of granulated ceramic material, particularly for ceramic proppants, comprises 20 to 55% by weight of magnesium orthosilicate, 20 to 35% by weight of MgO, and 2.5 to 11% by weight of Fe2O3. The resulting lightweight proppant material shows high mechanical strength. To further decrease the specific density of the proppant, the formation of small pores can be increased by adding 0.3 to 2.4% carbon as a gas-forming agent.
Claims27
A precursor composition for the production of granulated ceramic material,
- comprising 20 to 55% by weight of magnesium orthosilicate, 20 to 35% by weight of MgO, 2.5 to 11% by weight of Fe2O3, and a glass forming component containing SiO2.
A method for the production of a precursor composition, comprising the steps of:
- (a) preparing a precursor composition comprising 20 to 55% by weight of magnesium orthosilicate, 15 to 35% by weight of MgO, and 2.5 to 11% by weight of Fe2O3, by grinding a corresponding mixture of raw materials;
- (b) pelletizing the resulting composition;
- (c) sintering the pellets at a temperature between 1150 and 1280° C,;
- and
- (d) grinding the sintered pellets, together with an amount of carbon containing raw material corresponding to 0.3 to 3% by weight of carbon.
A precursor composition produced with a method comprising the steps of:
- (a) preparing a composition comprising 20 to 55% by weight of magnesium orthosilicate, 15 to 35% by weight of MgO, and 2.5 to 11% by weight of Fe2O3, by grinding a corresponding mixture of raw materials;
- (b) pelletizing the composition produced in step (a);
- (c) sintering the pellets at a temperature between 1150 and 1280° C.;
- and
- (d) grinding the sintered pellets together with an amount of carbon containing raw material corresponding to 0.3 to 3% by weight of carbon to produce a precursor composition.
A method for the production of a granulated ceramic material, comprising the steps of:
- (a) pelletizing a precursor composition comprising 20 to 55% by weight of magnesium orthosilicate, 15 to 35% by weight of MgO, 2.5 to 11% by weight of Fe2O3, and a glass forming component containing SiO2;
- and
- (b) sintering the pellets at a temperature between 1160 and 1360° C.
A granulated ceramic material produced with a method comprising the steps of:
- (a) pelletizing a precursor composition comprising 20 to 55% by weight of magnesium orthosilicate, thereof 15 to 35% by weight of MgO, 2.5 to 11% by weight of Fe2O3, and a glass forming component containing SiO2;
- and
- (b) sintering the pellets at a temperature between 1160 and 1360° C.
A precursor composition produced with a method comprising the steps of:
- (a) preparing a composition comprising 20 to 55% by weight of magnesium orthosilicate, 15 to 35% by weight of MgO, and 2.5 to 11% by weight of Fe2O3, by grinding a corresponding mixture of raw materials;
- (b) pelletizing the composition produced in step (a);
- (c) sintering the pellets at a temperature between 1150 and 1280° C. in a rotating kiln;
- and
- (d) grinding the sintered pellets together with an amount of carbon containing raw material corresponding to 0.3 to 3% by weight of carbon to produce a precursor composition, whereby the sintered material is ground to an average particle size between 2 and 3 μm, and the carbon containing material is ground to an average particle size between 0.5 and 3.0 μm.
Dependencies are inferred from the claim text.