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Production process for preparing ceramsite by using low-grade bauxite

A production process and low-grade technology, applied in the field of ceramsite proppant and its production process, can solve the problems of inability to produce high-strength ceramsite proppant in batches, and overcome low product turnover efficiency, uneven distribution of components, The effect of reducing the breakage rate

Active Publication Date: 2012-08-15
JINGANG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method directly uses spray granulation powder to directly manufacture cue balls, and then manufacture green balls, which improves the defect of low strength of green balls, but cannot mass-produce high-strength ceramsite proppant

Method used

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  • Production process for preparing ceramsite by using low-grade bauxite
  • Production process for preparing ceramsite by using low-grade bauxite
  • Production process for preparing ceramsite by using low-grade bauxite

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Experimental program
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Effect test

Embodiment 1

[0033] (1) Ingredients: According to the requirements of the above-mentioned ceramsite proppant ingredients, take low-grade bauxite ore (Al 2 o 3 Content 58%, SiO 2 Content 27%, TiO 2 Content 1.6%) 73 parts, other auxiliary materials are kaolin (Al 2 o 3 Content 35%, SiO 2 content 45%) 15 parts, calcium carbonate (CaO content 52%) 3 parts, talc (SiO 2 Content 60%, MgO content 31%) 4 parts, feldspar (SiO 2 Content 65%, K 2 O, Na 2 O total content 12.5%) 2 parts, titanium concentrate (TiO 2 Content 45%, Fe 2 o 3 Content 28%) 3 parts.

[0034](2) After the low-grade bauxite ore as the main material is crushed into 5mm ore pellets by a jaw crusher, it is mixed with other auxiliary materials to form a mixture. After mixing with the weight ratio of mixture: alumina ball grinding medium: water=1: 2.5: 0.9, add the sodium hexametaphosphate ball milling aid of 0.6% of the mixture quality, place it in the ball mill and wet grind it for 18 hours to become mud, so that The mu...

Embodiment 2

[0040] (1) Ingredients: According to the requirements of the above-mentioned ceramsite proppant ingredients, low-grade bauxite minerals (Al 2 o 3 Content 64%, SiO 2 Content 22%, TiO 2 Content 2.7%) 87 parts, other auxiliary materials are kaolin (Al 2 o 3 Content 33%, SiO 2 content 45%) 7 parts, calcium carbonate (CaO content 52%) 2 parts, talc (SiO 2 Content 57%, MgO content 30%) 1 part, titanium concentrate (TiO 2 Content 52%, Fe 2 o 3 Content 25%) 3 parts.

[0041] (2) The main material, low-grade bauxite ore, is mixed with other auxiliary materials to form a mixture by using a jaw crusher. After mixing with the weight ratio of mixture: alumina ball grinding medium: water=1: 3.0: 1.0, add the sodium hexametaphosphate ball milling aid with a mass ratio of 0.6% of the mixture, and place it in a ball mill for wet grinding for 22 hours to become a slurry. Make the mud particle size reach 8 microns, put it into the mud pool and put it stale; spray and dry the obtained m...

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Abstract

The invention discloses a production process for preparing ceramsite by using low-grade bauxite, comprising the steps of: crushing low-grade bauxite ore and then mixing with auxiliary materials to form a mixture; carrying out secondary wet milling until the granularity of slurry is 5-20 microns; after mustiness, pumping the slurry into a spray drying tower for drying granulating to form loose granules and then scattering the granules; after further spray rolling granulation, feeding into a drying-firing comprehensive system for drying and firing; and extracting out the afterheat generated in the firing process to the spry drying tower for utilization. According to the invention, the low-grade bauxite ore is used as the main material, so that the positive roles in rationally utilizing resources and reducing energy consumption are played; a wet ball milling process is adopted, so that the granularity distribution and mixing uniformity of mixed powder can be remarkably improved; by meansof the process of scattering spray granulated powder, the proportions of the pseudo granules and hollow granules in the spray granulated powder are decreased; and through the equipment integration design of the drying and firing processe, the damage rate of the semi-finished granules are decreased.

Description

technical field [0001] The invention relates to a ceramsite proppant for oil and gas wells and a production process thereof, in particular to a production technique for preparing ceramsite proppant by using low-grade bauxite. Background technique [0002] Fracturing technology plays an important role in the development of oil and natural gas, and petroleum proppant is the key material of fracturing technology. Petroleum proppant has gone through the development process of metal aluminum ball, glass ball, quartz sand and ceramsite proppant. Because of its high temperature resistance, high pressure resistance, corrosion resistance, high strength, high conductivity, low breakage rate and other characteristics, ceramsite proppant is gradually replacing traditional proppant such as quartz sand, and has been more and more widely used. [0003] The traditional ceramsite proppant preparation technology is to use high-quality bauxite (alumina content > 75%) and other raw material...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/14C04B35/622
Inventor 赵友谊王浩陈勇李刚王晋槐曾华生刘婷
Owner JINGANG NEW MATERIALS
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