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

A technology for oil well cement and processing technology, which is applied to chemical instruments and methods, drilling compositions, etc., can solve the problems of high cost, serious snowmen in the kiln, affecting the production of high-quality oil well cement, etc. quality, reducing the effect of making snowmen in the kiln

Active Publication Date: 2018-10-12
GEZHOUBA SONGZI CEMENT
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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

Method used

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

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Embodiment 1

[0023] The present invention will be further described below in conjunction with the examples, but the scope of protection claimed by the invention is not limited to the scope expressed in the examples.

[0024] The specific operation of using coal gangue as siliceous material to produce high-quality oil well cement is as follows:

[0025] 1) The raw materials entering the factory should be as stable as possible, and the main raw materials should use a single ore point as much as possible. The main raw materials are limestone, the siliceous materials are waste rocks from beneficiation, the iron materials are iron ore mining waste rocks, and the aluminum materials are wet powder from power plants. Coal ash and coal are matched with Yushen coal and carbonaceous shale at a ratio of 1:1. Limestone, fly ash, coal gangue, and iron ore mining waste rock are mixed according to the weight ratio and then ground, and the sieve residue of the finished product after the grinding is control...

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/34C09K8/46
Inventor 杨莉荣陈杉覃爱平皮光忠刘生超邹兴芳颜新传
Owner GEZHOUBA SONGZI CEMENT
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