Preparation of grout for stabilization of abandoned in-situ oil shale retorts
A process is claimed for the preparation of grout from burned shale by treating the burned shale in steam at approximately 7000 C to maximize the production of the materials alite and larnite. Oil shale removed to the surface during the preparation of an in-situ retort is first retorted on the surface and then the carbon is burned off, leaving burned shale. The burned shale is treated in steam at approximately 7000 C for about 70 minutes. The treated shale is then ground and mixed with water to produce a grout which is pumped into an abandoned, processed in-situ retort, flowing into the void spaces and then bonding up to form a rigid, solidified mass which prevents surface subsidence and leaching of the spent shale by ground water.
- Assignee:
- Dept. Of Energy
- Patent Number(s):
- US 4320994
- OSTI ID:
- 5431615
- Resource Relation:
- Patent File Date: Filed date 7 Dec 1979; Other Information: PAT-APPL-101364
- Country of Publication:
- United States
- Language:
- English
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Preparation of grout for stabilization of abandoned in-situ oil shale retorts. [Patent application]
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Related Subjects
ABANDONED SITES
STABILIZATION
GROUTING
PRODUCTION
IN-SITU RETORTING
SPENT SHALES
WASTE PRODUCT UTILIZATION
BONDING
CARBONATES
COMBUSTION PRODUCTS
COMMINUTION
OIL SHALES
PUMPING
SILICATES
STEAM
BITUMINOUS MATERIALS
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY SOURCES
FABRICATION
FOSSIL FUELS
FUELS
IN-SITU PROCESSING
JOINING
MATERIALS
OXYGEN COMPOUNDS
PROCESSING
RETORTING
SILICON COMPOUNDS
040401* - Oil Shales & Tar Sands- In Situ Methods
True & Modified