Preparation method of calcined portland cement clinker using oil-based drilling cuttings

A technology of portland cement and drilling cuttings, applied in cement production, etc., to achieve the effects of enhanced burnability, low heat of hydration, and huge social effects

Active Publication Date: 2021-05-14
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 obtain a gelled material with certain strength and durability through chemical reactions. ; Requires active raw materials or high reaction temperature, strong alkalinity, etc., and severe conditions limit the widespread use of the method

Method used

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  • Preparation method of calcined portland cement clinker using oil-based drilling cuttings
  • Preparation method of calcined portland cement clinker using oil-based drilling 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 low-hydration heat portland cement clinker by using oil-based drilling cuttings, and relates to the technical field of oil-based drilling cuttings processing. The present invention pretreats diesel-based drilling cuttings, mixes limestone, high-iron-aluminum waste rock, pre-treated diesel-based drilling cuttings, and non-ferrous metal slag according to a certain proportion and grinds them uniformly to prepare raw meal, and then feeds the raw meal to Put it into the new dry method rotary kiln, calcined at high temperature, and get clinker after cooling. The present invention can deal with major difficulties that plague oilfield drilling and mining, reduce the natural enrichment of heavy metal ions such as copper, zinc, lead, chromium, mercury, and barium in diesel-based drilling cuttings, and reduce the harm to groundwater and soil; The diesel oil and organic matter in the swarf can provide heat during the calcination process of clinker, which can significantly reduce clinker energy consumption, reduce CO 2 emissions, reduce clinker calcination temperature, significantly increase the output of cement mill and rotary kiln, and enhance raw meal production. Easy to burn, increase the liquid phase content of clinker, increase the lattice defects of dicalcium silicate in clinker, improve the activity of dicalcium silicate, and reduce the hydration heat value of cement.

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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Patent Type & Authority Patents(China)
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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