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A kind of preparation method of micron-scale spherical weighting material

A weighted material, micron-scale technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., to achieve low prices, easy access to raw materials, and reduce production costs

Active Publication Date: 2021-11-12
SINOSTEEL MAANSHAN INST OF MINING RES CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no relevant patents and literature reports in China

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Raw material selection density is 4.9g / cm 3 High-grade hematite and limonite mixed concentrate powder.

[0026] (1) Choose a density of 4.9g / cm 3 The high-grade hematite and limonite mixed concentrate powder, after crushing and grinding, sieving through a 200-mesh physical sieve, and then grinding through a Raymond mill, can produce fine powder particles with a particle size distribution D90 of 26 μm.

[0027] (2) Apply a negative charge to the prepared micropowder particles with a particle size distribution D90 of 26 μm using a paradigm generator, so that the surface of the particles has a uniform negative charge, and are transported to the high-temperature spheroidizing furnace through the micropowder conveying system, and the temperature in the furnace is adjusted. To 1800 ℃, the sintering process is completed under the synergy of the pressure system, the oxidizing atmosphere gas distribution system, and the heating system, and then transported to the rapid cooling ...

Embodiment 2

[0030] Raw material selection density is 5.0g / cm 3 High-grade specular iron ore concentrate powder.

[0031] (1) Choose a density of 5.0g / cm 3 The high-grade specularite concentrate powder, after crushing and grinding, sieving with a 200-mesh physical sieve, and then grinding with a Raymond mill, can produce fine powder particles with a particle size distribution D90 of 22 μm.

[0032](2) The prepared micropowder particles with a particle size distribution D90 of 22 μm are negatively charged by a paradigm generator, so that the surface of the particles has a uniform negative charge, and are transported to a high-temperature spheroidizing furnace through a micropowder conveying system, and the temperature in the furnace is adjusted. To 1600 ℃, the sintering process is completed under the synergy of the pressure system, the oxidizing atmosphere gas distribution system, and the heating system, and then transported to the rapid cooling device through the micro-powder delivery sys...

Embodiment 3

[0035] Raw material selection density is 5.1g / cm 3 High-grade magnetite concentrate powder.

[0036] (1) Choose a density of 5.1g / cm 3 The high-grade magnetite concentrate powder is used as the raw material, after crushing and grinding, sieving with a 200-mesh physical sieve, and then grinding with a Raymond mill, the micropowder particles with a particle size distribution D90 of 16 μm can be obtained.

[0037] (2) The prepared micropowder particles with a particle size distribution D90 of 16 μm are negatively charged by a paradigm generator, so that the surface of the particles has a uniform negative charge, and are transported to the high-temperature spheroidizing furnace through the micropowder conveying system, and the temperature in the furnace is adjusted. To 1600 ℃, the sintering process is completed under the synergy of the pressure system, the oxidizing atmosphere gas distribution system, and the heating system, and then transported to the rapid cooling device throug...

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Abstract

The invention discloses a preparation method of a micron-scale spherical weighting material, the selected density is ≥ 4.8g / cm 3 The high-purity iron ore concentrate powder is used as the raw material, and the fine powder particles with a particle size distribution D90 of 2 to 20 μm are obtained after crushing-airflow classification; the prepared fine powder particles are treated with electricity, so that the surface of the fine powder particles has the same electric charge; The micropowder particles with the same electrical properties on the surface are transported to the high-temperature spheroidizing furnace through the micropowder conveying system for spheroidization at 1400-1800°C, and then transported to the cooling device by airflow to complete the surface homogenization of the spherical micropowder particles, and finally collected by the micropowder The device collects micron-sized spherical weighted material. The raw material of the invention is easy to obtain, the price is low, the production cost is low, and the density of the prepared spherical weighting material is as high as 4.8-5.6g / cm 3 , the particle size distribution D90 is 2-40μm, and the spherical rate is ≥96%. The prepared high-density, micron-scale spherical weighting material can be widely used in drilling fluid and cement slurry.

Description

technical field [0001] The invention belongs to the technical field of weighting material preparation, and in particular relates to a preparation method of a micron-sized spherical weighting material, which is mainly used in high-density and ultra-high-density drilling fluid and cement slurry in the process of oil and gas field exploitation. Background technique [0002] In recent years, as my country's oil and gas exploration continues to expand to complex geographical environments such as deep sea, deep wells, and ultra-deep wells, the demand for high-density and ultra-high-density drilling fluids and cement slurries has gradually increased. For example, the reserves of oil and gas fields in the South China Sea account for 1 / 3 of my country's total oil and gas resources, of which 70% are stored in the deep sea area of ​​1.537 million square kilometers. In the oil and gas fields geographically located on the edge of mountains and basins, such as Xinjiang Junggar Basin and S...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/03
CPCC09K8/032
Inventor 许传华柳雷彭丽芬孙国权刘亚辉汪光辉
Owner SINOSTEEL MAANSHAN INST OF MINING RES CO LTD
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