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Method for preparing high-strength petroleum fracturing propping agent from low-grade bauxite

A low-grade bauxite and fracturing proppant technology, which is applied in earthwork drilling, mining fluid, wellbore/well components, etc., can solve the problem that bauxite cannot be directly used as raw material to prepare petroleum fracturing proppant, etc. Achieve the effects of increasing various properties, improving the ratio of aluminum to silicon, and lowering the price

Inactive Publication Date: 2013-02-27
KUNMING METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to invent a method for preparing petroleum fracturing proppant from low-grade bauxite in order to solve the deficiency that low-grade bauxite with complex components cannot be directly used as raw material to prepare petroleum fracturing proppant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Will contain Al 2 o 3 25-40%, TiO 2 1~4%, SiO 2 5-26% of the low-grade bauxite samples are crushed and ground, and the grinding fineness is 74% -0.074mm. Add 150-240g / t oleic acid, and get bauxite foam product with high aluminum-silicon ratio by flotation containing Al 2 o 3 42~51%, TiO 2 2~6%, SiO 2 2~8%;

[0025] 2) The foam product obtained by flotation is mixed with auxiliary materials according to a certain proportion, and the weight percentage of auxiliary materials is 10%, among which microsilica fume in auxiliary materials: 50%; manganese dioxide: 5%; titanium dioxide: 5%; magnesium carbonate and Magnesium oxide: 4.5%; Zirconia: 0.5%; Aluminum ash: 35%.

[0026] 3) After mixing, the mixed material enters the jet mill for crushing, and then enters the coating and internal granulation to obtain a small pellet green body with a suitable particle size.

[0027] 4) Put the small pellet green body into the rotary kiln, control the temperature of the ...

Embodiment 2

[0030] 1) Will contain Al 2 o 3 29~51%, TiO 2 1~2%,SiO2 2 6-28% of the low-grade bauxite samples are crushed and ground, and the grinding fineness is 80% -0.074mm. Add 180-260g / t of amine collectors, and the concentrate product obtained by flotation contains Al 2 o 3 42~56%, TiO 2 1.5~6%, SiO 2 1~9%;

[0031] 2) The foam product obtained by flotation is mixed with auxiliary materials according to a certain ratio, and the weight percentage of auxiliary materials is 5%, among which microsilica fume in auxiliary materials: 45%; manganese dioxide: 5%; titanium dioxide: 5%; magnesium carbonate and Magnesium oxide: 4.5%; Zirconia: 0.5%; Aluminum ash: 40%.

[0032] 3) After mixing, the mixed material enters the jet mill for crushing, and then enters the coating and internal granulation to obtain a small pellet green body with a suitable particle size.

[0033] 4) Put the small pellet green body into the rotary kiln, control the temperature of the furnace head to 1000°C...

Embodiment 3

[0036] 1) Will contain Al 2 o 3 34~60%, TiO 2 3~7%, SiO 2 8-30% of the low-grade bauxite samples are crushed and ground, and the grinding fineness is 85% -0.074mm. Add 200-350g / t of oleic acid collector, and the concentrate product obtained by flotation contains Al 2 o 3 40~60%, TiO 2 4.5~9%, SiO 2 4~10%;

[0037]2) The foam product obtained by flotation is mixed with auxiliary materials according to a certain ratio, and the weight percentage of auxiliary materials is 5%, among which microsilica fume in auxiliary materials: 35%; manganese dioxide: 5%; titanium dioxide: 15%; magnesium carbonate and Magnesium oxide: 14.5%; Zirconia: 0.5%; Aluminum ash: 35%.

[0038] 3) After mixing, the mixed material enters the jet mill for crushing, and then enters the coating and internal granulation to obtain a small pellet green body with a suitable particle size;

[0039] 4) Put the small pellet green body into the rotary kiln, control the furnace head temperature to 1300 °C...

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Abstract

The invention discloses a method for preparing a high-strength petroleum fracturing propping agent from low-grade bauxite. In the method, low-grade bauxite used as a raw material is treated by a mineral dressing method to increase the aluminum-silicon ratio; and then, the raw material is mixed with auxiliary materials to prepare the high-strength petroleum fracturing propping agent. The method comprises the following steps: (1) selecting a representative low-grade bauxite ore sample, crushing and grinding the raw ore, and increasing the aluminum-silicon ratio of the raw material through an anionic oleic acid collector direct flotation or cationic amine collector reverse flotation method; and (2) grinding the floated bauxite with the increased aluminum-silicon ratio, then mixing with the auxiliary materials according to a certain ratio, further mixing and pulverizing in a jet pulverizing machine, then granulating in a coating machine to obtain a green compact having an appropriate particle size, and sintering the green compact in a rotary kiln to obtain the high-strength petroleum fracturing propping agent. According to the invention, the process is simple and environment-friendly, the low-grade bauxite can be utilized, and the production cost is low.

Description

technical field [0001] The invention relates to a production method of using low-grade bauxite to prepare a high-strength petroleum fracturing proppant, belonging to the technical field of new materials. Background technique [0002] Oil fracturing proppants play a very important role in the exploitation of oil and natural gas, and are supports that keep deep rocks in a cracked state. When oil and gas are mined in deep wells, high closure pressure and low permeability deposits are treated by fracturing to crack the oil-bearing rock formations, and oil and gas gather from the fractures. Using support material and high-pressure solution to enter the formation and fill in the rock formation fractures can prevent the support fractures from closing due to stress release, thereby maintaining high conductivity, allowing oil and gas to flow freely, and increasing production. [0003] Currently commonly used petroleum fracturing proppants include quartz sand, ceramsite, and various ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/10C04B35/14C09K8/80
Inventor 张汉平刘玫华宋涛陈献梅乔吉波汤优优吕晋芳梁溢强张谌虎杨林印勇刘述仁
Owner KUNMING METALLURGY INST
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