Unlock instant, AI-driven research and patent intelligence for your innovation.

Environment-friendly method for light burning high-quality magnesia by magnesite concentrate

A light-burning magnesia and environment-friendly technology, applied in the field of refractory material production, can solve the problems of unorganized dust emission and dust pollution, and achieve the effect of expanding the availability, environmental protection and light-burning process, and improving the environmental benefits of enterprises.

Active Publication Date: 2016-12-07
海城市恒镁科技有限公司
View PDF16 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims at the dust pollution problem in the current magnesite light-burned magnesia industry, takes low-grade magnesite flotation concentrate (MgO≥47%) as the object, and overcomes the pulverization problem in the magnesite roasting process, CaO , SiO 2 , Fe 2 o 3 、Al 2 o 3 The problem of deep separation of other impurities has solved the fugitive emission of dust during the light burning process of magnesite from the source, and at the same time realized the production of low-grade magnesite MgO≥98% high-quality light-burned magnesia, effectively improving the environmental and economic benefits of the enterprise

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

[0025] In a method of environment-friendly magnesite concentrate light-burned magnesia, at first the magnesite concentrate of MgO 47.2%, 7% binding agent (light-burned magnesia 5%, polyacrylic acid 1%, polyacrylic acid Sodium 1%) mixed with 12% water, mixed evenly by a compactor, pressed in a briquette machine with a pressure of 200MPa to form pellets, and aged for 72 hours. Lightly burn the pellets in a shaft furnace at 1000°C for 5 hours, with a heating rate of 20°C / min and a cooling rate of 5°C / min. The magnesia pellets are finely ground by Raymond mill. After fine grinding, the light-burned magnesium powder with a particle size of <0.074mm accounts for 72% of the total light-burned magnesium powder. The material is high-quality light-burned magnesium oxide powder, MgO≥98%.

Embodiment 2

[0027] In a method of environment-friendly magnesite concentrate light burning magnesia, at first the magnesite concentrate of MgO 47.1%, 10% binder (polyacrylic acid 3%, sodium polyacrylate 1%, ammonium polyacrylate 3%, polyacrylamide 3%) mixed with 10% water, mixed uniformly by a compactor, pressed in a briquetting machine with a pressure of 400MPa to form pellets, and aged for 80 hours. Lightly burn the pellets in a shaft furnace at 800°C for 10 hours, with a heating rate of 10°C / min and a cooling rate of 4°C / min. Magnesium oxide pellets are crushed by a squirrel cage crusher. After crushing, the light-burned magnesium powder with a particle size of <0.074mm accounts for 61% of the total light-burned magnesium powder. High-quality light-burned magnesia powder, MgO≥98%.

Embodiment 3

[0029] In a method of environment-friendly magnesite concentrate light-burned magnesia, at first the magnesite concentrate of MgO 47.0%, 9% binding agent (light-burned magnesia 4%, polyammonium polyacrylate 2%, polyacrylic acid Acrylic acid amide (3%) is mixed with 15% of water, mixed uniformly by a compactor, pressed in a briquetting machine with a pressure of 300MPa to form pellets, and aged for 96 hours. Lightly burn the pellets in a shaft furnace at 1200°C for 4 hours, with a heating rate of 30°C / min and a cooling rate of 4°C / min. The magnesia pellets are finely ground by the European version of the mill. After fine grinding, the light-burned magnesium powder with a particle size of <0.074mm accounts for 95% of the total light-burned magnesium powder. The material is high-quality light-burned magnesium oxide powder, MgO≥98%.

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
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses an environment-friendly method for light burning high-quality magnesia by magnesite concentrate, and belongs to the technical field of refractory material production. Low-grade magnesite flotation concentrate serves as a raw material, magnesite concentrate briquetting-light burning-air separation technology is adopted, the problem of unorganized dust discharge in the light burning process of magnesite is fundamentally solved, impurities such as CaO, SiO2, Fe2O3 and Al2O3 in the magnesite are deep separated, and the high-quality light-burned magnesia with MgO>=98%. The method solves the problem of pulverization of the magnesite in the roasting process, the clean and environment-friendly light burning process of the magnesite is realized, the scope of available magnesite resources is effectively widened, the high-quality light-burned magnesia with high additional values is produced by the low-grade magnesite, and environmental and economic benefits of enterprises can be effectively improved.

Description

technical field [0001] The invention relates to an environment-friendly method for lightly burning high-quality magnesium oxide with magnesite concentrate and belongs to the technical field of refractory material production. Background technique [0002] Light-burned magnesia is a representative magnesia product. It is an important intermediate product for the production of various quality mid-grade magnesia, high-purity magnesia and fused magnesia. The quality of light-burned magnesia is the core element that affects the quality of downstream magnesia products. [0003] Light-burned magnesia is mainly produced by magnesite lump ore (grain size 150mm-300mm) shaft furnace light-burning-thermal separation process. As the magnesite is pulverized during the roasting process, the magnesium oxide lump ore is lightly burned in the shaft furnace and then pulverized into light-burned magnesium oxide powder of 0.05mm to 5mm. The temperature of the light-burned magnesium oxide powder i...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C04B2/10
CPCC04B2/102C04B2/104
Inventor 赵磊王蒙岩林江顺王禹
Owner 海城市恒镁科技有限公司