A kind of G grade oil well cement and its processing technology

Abstract

The invention provides a method for producing high-quality G-class oil well cement with gangue as a siliceous material. The method specifically comprises the following steps that the gangue is used as the siliceous material for dosing, a raw material is obtained through grinding, preheating decomposition, high-temperature calcination and cooling are conducted, so that oil well clinker is obtained, the oil well clinker and gypsum are ground together, and then oil well cement is obtained. After the method is implemented, the raw materials except limestone are waste residues, and therefore the coal consumption of clinker calcination is greatly reduced. The grinding yield of the raw material is greatly increased, energy sources are greatly saved, emission of CO2 is reduced, energy conservation and emission reduction are achieved, and the method accords with the national energy conservation and emission reduction environmental-protection concept; by the adoption of the scheme, the waste residues, such as the gangue, coal ash and mining barren rock are consumed greatly, and environmental pollution is reduced; besides, production cost can be reduced, and economic benefits can be increased.

Description

technical field [0001] The invention relates to the field of oil well cement production, in particular to a method for producing high-quality G-grade oil well cement using coal gangue as a siliceous material. Background technique [0002] Siliceous raw materials are the main raw materials for oil well cement production, and their silicon content and alkali content are required to be high. Cement plants generally use high-quality silica sand as the siliceous raw material for oil well cement. Its cost is higher than coal gangue. Moreover, because the silicon content of silica sand is too high and the aluminum content is low, it often leads to oil well cement clinker C 3 If A is low, the kiln will make snowmen seriously, which will affect the production of high-quality oil well cement. [0003] Coal gangue is solid waste discharged from the coal mining process, and its main component is SiO 2 and Al 2 o 3 . Contents of the invention [0004] The purpose of the present ...

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Problems solved by technology

Its cost is higher than coal gangue

Moreover, because the silicon content of silica sand is too high and the aluminum content is low, it often leads to oil well cement clinker C 3 A is low, and the kiln has a serious snowman, which affects the production of high-quality oil well cement

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