Preparation method for calcining Portland cement clinker from oil-based drill cuttings

A portland cement and oil-based drilling technology, which is applied in cement production, etc., to achieve the effects of short setting time, reducing CO2 emissions, and reducing energy consumption of clinker

Active Publication Date: 2018-06-08
JIAHUA SPECIAL CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This invention patent uses the principle of alkali excitation, which requires potentially active industrial waste or calcined high-silicon-aluminum kaolin as the main raw material, and adopts appropriate processing techniques to o...

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  • Preparation method for calcining Portland cement clinker from oil-based drill cuttings
  • Preparation method for calcining Portland cement clinker from oil-based drill cuttings

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Embodiment 1

[0029] As a preferred embodiment of the present invention, this embodiment discloses:

[0030] A method for preparing calcined Portland cement clinker using oil-based drilling cuttings, comprising the following steps:

[0031]Step A, the pretreatment of diesel-based drilling cuttings, the diesel-based drilling cuttings are subjected to centrifugal deoiling and dehydration, so that the content of diesel-based drilling cuttings is reduced to below 5%, and the water content is reduced to below 5%; Oil and dehydrated diesel-based drilling cuttings are crushed so that the particle size of diesel-based drilling cuttings is less than 10mm; the crushed diesel-based drilling cuttings and water-absorbing agent are mixed according to the ratio of 100:10, and the mixture is formed after mixing silicon material;

[0032] Step B, preparation of low heat of hydration Portland cement clinker:

[0033] A, raw material preparation, prepare raw material according to 55 parts of limestone, 5 pa...

Embodiment 2

[0037] As another preferred embodiment of the present invention, this embodiment discloses:

[0038] A method for preparing calcined Portland cement clinker using oil-based drilling cuttings, comprising the following steps:

[0039] Step A, the pretreatment of diesel-based drilling cuttings, the diesel-based drilling cuttings are subjected to centrifugal deoiling and dehydration, so that the content of diesel-based drilling cuttings is reduced to below 5%, and the water content is reduced to below 5%; Oil and dehydrated diesel-based drilling cuttings are crushed so that the particle size of diesel-based drilling cuttings is less than 10mm; the crushed diesel-based drilling cuttings and water-absorbing agent are mixed according to the ratio of 100:8, and the mixture is formed after mixing silicon material;

[0040] Step B, preparation of low heat of hydration Portland cement clinker:

[0041] A, raw material preparation, prepare raw material according to 60 parts of limestone...

Embodiment 3

[0045] As another preferred embodiment of the present invention, this embodiment discloses:

[0046] A method for preparing calcined Portland cement clinker using oil-based drilling cuttings, comprising the following steps:

[0047] Step A, the pretreatment of diesel-based drilling cuttings, the diesel-based drilling cuttings are subjected to centrifugal deoiling and dehydration, so that the content of diesel-based drilling cuttings is reduced to below 5%, and the water content is reduced to below 5%; Oil and dehydrated diesel-based drilling cuttings are crushed so that the particle size of diesel-based drilling cuttings is less than 10mm; the crushed diesel-based drilling cuttings and water-absorbing agent are mixed according to the ratio of 100:6, and the mixture is formed after mixing silicon material;

[0048] Step B, preparation of low heat of hydration Portland cement clinker:

[0049] A, raw material preparation, prepare raw material according to 65 parts of limestone...

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Abstract

The invention discloses a preparation method for calcining a low-hydration heat Portland cement clinker from oil-based drill cuttings, and relates to the technical field of oil-based drill cutting treatment. The preparation method comprises the following steps: pretreating diesel oil-based drill cuttings, uniformly mixing limestone, a high-iron aluminum waste stone, the pretreated diesel oil-baseddrill cuttings and non-ferrous metal slag according to a certain ratio, then grinding into raw meal, then feeding the raw meal into a novel dry-process rotary kiln, performing high-temperature calcination, and cooling to obtain the clinker. By the preparation method, major difficulties troubling oilfield drilling exploitation can be overcome, enrichment of heavy metal ions such as copper, zinc, lead, chromium, mercury and barium in the diesel oil-based drill cuttings in nature can be reduced, and damage to groundwater and soil can be reduced; diesel oil and organic substances in the drill cuttings can provide heat in the clinker calcinating process, so that the energy consumption of the clinker can be significantly reduced, the CO2 emission can be reduced, the clinker calcinating temperature can be lowered, the outputs of a cement mill and the rotary kiln are obviously increased, the burnability of the raw meal is enhanced, the liquid phase content of the clinker is increased, latticedefects of dicalcium silicate in the clinker are increased, the activity of the dicalcium silicate is improved, and the hydration heat value of cement is reduced.

Description

technical field [0001] The invention relates to the technical field of oil-based drilling cuttings processing, in particular to a preparation method for calcining Portland cement clinker using oil-based drilling cuttings. Background technique [0002] Oil-based drilling cuttings are mainly drilled rock formation cuttings that are brought back to the ground by the circulation of oil-based drilling fluid during the production of oil and gas wells. Oil-based drilling cuttings contain a lot of petroleum organic matter and heavy metals, and also contain various organic emulsifiers, weighting agents, and flocculants added to oil-based drilling fluids. Because the leachate of oil-based drilling fluids has high toxicity, and Different types of chemical treatment agents stabilize the bridging structure between various pollutants in drilling cuttings and inorganic solids, and their composition structure is more complicated, which objectively increases the difficulty and cost of proces...

Claims

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Application Information

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IPC IPC(8): C04B7/30C04B7/38C04B7/24
CPCC04B7/24C04B7/30C04B7/38Y02P40/10
Inventor 张凌志韩建国古安林
Owner JIAHUA SPECIAL CEMENT
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