A kind of hollow glass microbead and preparation method thereof

A hollow glass microbead and submicron technology, which is applied in the field of cement slurry additive materials, can solve the problem that the particle size of hollow microbead products cannot be accurately controlled, the hollowness and wall thickness cannot be well controlled, and the preparation of hollow microbead products can not be solved. The method is cumbersome and other problems, to achieve the effect of tight stacking, high strength, and high resistance to high pressure.

Active Publication Date: 2015-12-09
CHINA PETROLEUM & CHEM CORP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This method mainly has three disadvantages: 1. This method uses the method of sorting after pulverizing glass to control the particle size, so it cannot accurately control the particle size of the hollow microsphere product; 2. This method is obtained by inflating the molten glass powder. Hollow spheres, so the hollowness and wall thickness cannot be well controlled, so the strength of the hollow microsphere products will not be particularly high, and can only reach 44MPa; 3. This method uses two high-temperature melting heating and two sorting methods, This is tedious and wastes energy
[0005] In general, the existing hollow microsphere products cannot meet the requirements of deep well cementing technology in the field of oil drilling for cement slurry density reduction and additive materials with high pressure bearing capacity, and the preparation method of the existing hollow microsphere products is cumbersome and energy-consuming. Big

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  • A kind of hollow glass microbead and preparation method thereof
  • A kind of hollow glass microbead and preparation method thereof
  • A kind of hollow glass microbead and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) First mix 46kg of nano-sized silica (average particle size 30nm), 25kg of micron-sized silica (average particle size of 2 microns), 22kg of sub-micron-sized silicon oxide (average particle size of 120nm), 1kg of alumina, iron oxide 0.1kg, zirconia 1.8kg, boron oxide 4.2kg, zinc oxide 0.2kg, lithium oxide 0.3kg, barium oxide 0.2kg, sodium silicate 20kg after dry mixing, use 300kg water in a high-speed mixer to make a uniform slurry.

[0047] (2) Pump the above slurry into a centrifugal spray granulator to granulate the precursor of hollow glass microspheres through a circulating pump, wherein the centrifugal speed is 20,000rpm; the drying temperature during granulation is 260°C, and the inlet temperature of the dryer is 120°C °C, the outlet temperature is 250 °C. Under the action of the induced draft fan, the spheres coming out of the drying tower are respectively deposited in the bottom of the tower, the cyclone collection bin and the bag collection bin according to...

Embodiment 2

[0050] (1) First mix 42kg of nano-sized silica (average particle size 40nm), 26kg of micron-sized silica (average particle size of 2 microns), 26kg of submicron-sized silicon oxide (average particle size of 120nm), 2kg of alumina, iron oxide 0.1kg, zirconia 2kg, boron oxide 3.6kg, zinc oxide 0.2kg, lithium oxide 0.2kg, barium oxide 0.2kg, sodium silicate 30kg after dry mixing, use 400kg water in a high-speed mixer to make a uniform slurry.

[0051] (2) Pump the above slurry into a centrifugal spray granulator to granulate the precursor of hollow glass microspheres through a circulating pump, wherein the centrifugal speed is 21000rpm; the drying temperature during granulation is 260°C, and the inlet temperature is 120°C. The outlet temperature was 250°C. Under the action of the induced draft fan, the spheres coming out of the drying tower are respectively deposited in the bottom of the tower, the cyclone collection bin and the bag collection bin according to their weight and ar...

Embodiment 3

[0054] (1) First mix 38kg of nano-sized silicon dioxide (average particle size 40nm), 27kg of micron-sized silicon dioxide (average particle size of 2 microns), 27kg of submicron-sized silicon oxide (average particle size of 120nm), 2kg of aluminum oxide, iron oxide 0.1kg, zirconia 2kg, boron oxide 3kg, zinc oxide 0.3kg, lithium oxide 0.3kg, barium oxide 0.3kg, sodium metasilicate 20kg after dry mixing, use 500kg water in a high-speed mixer to make a uniform slurry.

[0055] (2) Pump the above slurry into a centrifugal spray granulator to granulate the precursor of hollow glass microspheres through a circulating pump, wherein the centrifugal speed is 21000rpm; the drying temperature during granulation is 260°C, and the inlet temperature is 120°C. The outlet temperature was 250°C. Under the action of the induced draft fan, the spheres coming out of the drying tower are respectively deposited in the bottom of the tower, the cyclone collection bin and the bag collection bin accor...

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Abstract

The invention provides a hollow glass bead and a preparation method thereof. The hollow glass bead has a hollow structure, an average particle size of 20-60 mu m and a density of 0.30-0.92 g / cm<3>, and has the advantage of low broken rate under high pressure. The hollow glass bead is prepared by roasting water-soluble silicate and raw material components in parts by weight: 100 parts of nanometer silicon oxide, 40-80 parts of micrometer silicon oxide, 40-80 parts of submicron silicon oxide, 1-6 parts of alumina, 0-1 part of iron oxide, 3-8 parts of zirconia, 2-13 parts of boron oxide, 0-1 part of zinc oxide, 0-2 parts of lithium oxide and 0-2 parts of barium oxide, wherein the weight ratio of the water-soluble silicate to the total raw material component is (0.1-1):1. The obtained hollow glass bead possesses parameters such as controllable particle size, density, sphericity and the like, also possesses relatively compact hollow ball shell, is capable of bearing relatively high extruding effect, and can be used as a material of a cement mortar density lightening agent for deep wells.

Description

technical field [0001] The invention relates to the field of cement slurry additive materials used in well cementing in petroleum drilling technology, and furthermore, relates to hollow glass microspheres and a preparation method thereof. Background technique [0002] Hollow glass microspheres are a new type of material developed in recent years with a wide range of uses and excellent performance, which has the obvious effect of reducing weight. At present, it is mainly used as a density reducing material in drilling fluid and cementing fluid in the oil and gas industry. [0003] Specifically, Chinese patent application CN101638295A (patent application number 200810138749.7) introduces a preparation method of hollow glass microspheres, which includes: batching, melting, crushing, drying, crushing, classification, hollow spheroidization, collection, winnowing. First, mix the raw materials weighed according to the formula evenly, and melt them in a melting furnace used to pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/06C04B14/22
Inventor 穆海朋范俊梅丁士东周仕明杨红岐汪晓静袁方利
Owner CHINA PETROLEUM & CHEM CORP
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