Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of alumina corundum hollow sphere

A technology of alumina-based corundum and hollow balls, which is applied in ceramic products, applications, household appliances, etc., can solve problems such as complex process, and achieve the effects of high mechanical strength, low damage rate, and high service temperature

Active Publication Date: 2010-10-20
JIANGSU JINGBANG NEW MATERIALS
View PDF2 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high alumina bauxite contains a certain amount of impurities such as SiO 2 、TiO 2 , Fe 2 o 3 etc., will adversely affect the production of corundum hollow spheres with higher alumina content and must be removed
The desiliconization methods in high alumina bauxite include grinding, flotation, roasting and dissolution, etc., but these production processes need to involve liquid phase preparation, and the process is relatively complicated, so it is not suitable for the preparation of corundum hollow spheres by electromelting as a raw material purification method.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The aluminum oxide content in the high alumina bauxite adopted is 88%, the silicon oxide content is 7%, and the iron oxide content is 2%. SiO 2 1.2 times the number of moles, mix the above raw materials in proportion and prepare them for use. After the electric arc furnace smelting preparations are completed, add them to the furnace for smelting. After the material temperature reaches 1500 ° C, turn on the ventilation device at the top of the electric arc furnace. Reduction occurs during the smelting process of the mixture. Reaction, gradually remove the silica and impurities in the bauxite, adjust the current refining for 30 minutes after the raw materials are completely melted, lift the electrode rod after the temperature reaches 2100°C, and immediately tilt the furnace to spray to prepare corundum hollow balls, the furnace bottom material cannot be used It is used to prepare corundum hollow spheres, but it can also be used to prepare brown corundum. The sieved spher...

Embodiment 2

[0023] The content of alumina in the high alumina bauxite used is 83%, the content of silicon oxide is 7%, and the content of iron oxide is 2%. The desiliconization materials are coke and charcoal, and the amount of C moles in coke and charcoal is high. SiO in bauxite 2 4 times the number of moles, mix the above raw materials in proportion and prepare them for use. After the electric arc furnace smelting preparations are completed, add them to the furnace for smelting. After the material temperature reaches 1500 ° C, the top exhaust device of the electric arc furnace is turned on. Reduction occurs during the smelting process of the mixture. Reaction, gradually remove the silica and impurities in the bauxite, adjust the current refining for 30 minutes after the raw materials are completely melted, lift the electrode rod after the temperature reaches 2100°C, and immediately tilt the furnace to spray to prepare corundum hollow balls, the furnace bottom material cannot be used It ...

Embodiment 3

[0025] The content of alumina in the high alumina bauxite used is 80%, the content of silicon oxide is 11%, and the content of iron oxide is 1%. The desiliconization material is composed of petroleum coke, calcined coke, coal and iron filings. , calcined coke, and coal to ensure that the moles of C among them are SiO in high alumina bauxite 2 0.8 times the number of moles, the amount of iron filings ensures that the number of moles of Fe in it is SiO in high alumina bauxite 2 5 times the number of moles, mix the above raw materials in proportion and prepare them for use. After the electric arc furnace smelting preparations are completed, put them into the furnace for smelting. After the material temperature reaches 1500°C, turn on the exhaust device at the top of the electric arc furnace, and the reduction occurs during the smelting process of the mixture. Reaction, gradually remove the silica and impurities in the bauxite, adjust the current refining for 30 minutes after the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Granularityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of an alumina corundum hollow sphere. High alumina bauxite serves as raw material and desilicication material is introduced, which are smelted and purified in a three-phase AC electric arc ore furnace or a DC electric arc ore furnace, sprayed by compressed air and then are sieved to obtain the corundum hollow sphere of 0.2 to 5mm. The alumina with low cost is used as the raw material and the purification of the alumina is realized in the smelting process by adding the desilicication material. The alumina is sprayed and fused to prepare the corundum hollow sphere. The manufacture cost of the corundum hollow sphere can be reduced greatly and the use temperature of the prepared corundum hollow sphere is similar to the use temperature of an alumina hollow sphere. The compression strength is high. Compared with alumina heat insulating material produced through a burnout object addition method, a foam method and an air genetic method, the invention has higher mechanical strength and use temperature and is applicable to being the aggregate of light castables. The damage rate in the construction process is low.

Description

technical field [0001] The invention relates to a preparation method of a refractory material, in particular to a preparation method of an alumina-based corundum hollow sphere. Background technique [0002] Today, when traditional energy sources are increasingly depleted and new energy sources are developing slowly, the most urgent task at present is to develop lining materials that are lightweight, high-strength, good in thermal shock stability, and high in operating temperature to meet the needs of high-temperature furnaces with lightweight structures, changing the traditional Ultra-high temperature kilns have disadvantages such as large heat capacity, low heating rate, high energy consumption, short service life, and large mid-term maintenance due to the heavy structure, which saves energy and reduces energy consumption. Continuous development services. [0003] Since lightweight thermal insulation materials obtain low thermal conductivity by introducing pores, the intro...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B35/66
CPCC04B2235/3418C04B38/009C04B2235/72C04B2235/528C04B2235/3272C04B2235/3217C04B35/653C04B35/107C04B38/0087B29C49/0005
Inventor 王家邦
Owner JIANGSU JINGBANG NEW MATERIALS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com