Method for preparing special fracturing propping agent for shale gas by utilizing industrial waste

A technology for fracturing proppant and industrial waste, which is applied in the chemical industry, earthwork drilling, climate sustainability, etc. It can solve the problems that affect the prospect of industrial production and popularization and application, poor mechanical properties of proppant, sintering temperature, and complicated molding methods and other problems, to achieve the effect of high-temperature fluxing, which is beneficial to environmental protection and has high activity.

Inactive Publication Date: 2013-09-11
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN201010136972.5 discloses "low-density ceramsite proppant and its preparation method", which changes the molding method and uses the ingenious way of multi-layer cladding to synthesize a nodular reinforced proppant with an inner core and an outer shell, which improves the Product performance, but the molding method is too complicated and the handling is not strong, which affects the prospect of industrial production and promotion and application
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Method used

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  • Method for preparing special fracturing propping agent for shale gas by utilizing industrial waste

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 1) Calcining the fly ash at a temperature of 830°C and holding it for 40 minutes to obtain a calcined material;

[0030] 2) Put the calcined material into a cyclone airflow mill for crushing to form calcined material fines, which are passed through a 325 mesh sieve to obtain waste residue powder; put kaolin into a cyclone airflow mill for crushing to form kaolin fines, The kaolin fine material is passed through a 325 mesh sieve to obtain kaolin powder;

[0031] 3) Put 93% of waste residue powder, 6% of kaolin powder, and 1% of polysilicon powder into a mixer and mix evenly to obtain a mixture according to the mass percentage;

[0032] 4) The mixture is granulated into balls in a ball forming machine, and the granulated particles pass through a 18-30 mesh sieve, and the sieve residue particles between the two sieves are collected to become granules to be fired;

[0033] 5) Put the particles to be fired into an alumina crucible, and place it in a silicon carbide rod resi...

Embodiment 2

[0035] 1) Calcining coal gangue at a calcination temperature of 840°C and holding for 38 minutes to obtain a calcined material;

[0036] 2) Put the calcined material into a cyclone airflow mill for crushing to form calcined material fines, which are passed through a 325 mesh sieve to obtain waste residue powder; put kaolin into a cyclone airflow mill for crushing to form kaolin fines, The kaolin fine material is passed through a 325 mesh sieve to obtain kaolin powder;

[0037] 3) Put 94.1% waste slag powder, 5% kaolin powder, and 0.9% polysilicon powder into a mixer and mix evenly to obtain a mixture according to the mass percentage;

[0038] 4) The mixture is granulated into balls in a ball forming machine, and the granulated particles pass through a 18-30 mesh sieve, and the sieve residue particles between the two sieves are collected to become granules to be fired;

[0039] 5) Put the particles to be fired into an alumina crucible, and place it in a silicon carbide rod resis...

Embodiment 3

[0041] 1) Calcining the fly ash and coal gangue separately, the calcination temperature is 845°C, and holding for 35min, to obtain the fly ash calcined material and the coal gangue calcined material respectively;

[0042] 2) Put the fly ash calcined material into a cyclone airflow pulverizer and crush it to form a fine fly ash calcined material, which is passed through a 325 mesh sieve to obtain a fly ash waste slag powder; calcinate the coal gangue The raw material is crushed in a cyclone airflow pulverizer to form a fine coal gangue calcined material, which is passed through a 325 mesh sieve to obtain a coal gangue waste slag powder; the kaolin is put into a cyclone airflow pulverizer for crushing to form a kaolin fine Material, kaolin fine material crosses 325 mesh sieves, obtains kaolin powder;

[0043] 3) According to the mass percentage, put 95.3% of the mixture of fly ash waste slag powder and coal gangue powder waste slag powder, 4% of kaolin powder, and 0.7% of polysi...

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Abstract

The invention provides a method for preparing a special fracturing propping agent for shale gas by utilizing industrial wastes. The method comprises the following steps of: calcining fly ashes and/or coal gangues, grinding by using an air-current mill, screening, so as to form waste residue powders; weighing the waste residue powders, kaolin and polycrystalline silicon powders in proportion, putting in a mixer to mix uniformly, and prilling to balls; putting particles after balling into a crucible, sintering in an electric furnace, and taking out after natural cooling, thereby obtaining the special fracturing propping agent for the shale gas. The method provided by the invention has the advantages that the raw material is extensive in source, the micro structure of a porcelain body is improved, the firing temperature is low, the firing period is short, the method is energy-saving, low-carbon and environment-friendly, and the integrated performance of products is improved; the prepared propping agent has the excellent characteristics of low density, high intensity, high-temperature resistance and corrosion resistance and the like, and can provide a fracturing material with good performance for middle/deep-layer shale gas fields.

Description

technical field [0001] The invention relates to a method for preparing a fracturing proppant, in particular to a method for preparing a special fracturing proppant for shale gas by using industrial waste. Background technique [0002] As a new industry, fracturing proppant has not been developed for a long time in my country, its product structure and varieties are still far from perfect, and the processing scale and level of the industry are in the initial stage of development. Most oil and gas fields are of medium depth, requiring fracturing proppants to have high strength and low fragmentation rate to withstand the huge pressure of the rock formation and various corrosions in the formation environment. In the world, sintered corundum products are often used as fracturing proppants in medium and deep oil and gas fields. Although this product can meet the requirements in terms of physical and chemical properties, the source of raw materials is difficult, the processing tech...

Claims

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Application Information

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IPC IPC(8): C04B35/00C04B35/622C09K8/80
CPCY02P20/10
Inventor 陈平殷海荣
Owner SHAANXI UNIV OF SCI & TECH
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