Composite binder and powder pellet obtained through same

A binder and pellet technology, applied in the field of composite binders, can solve the problems of lack of research on the preparation process route of magnesium oxide pellets, and achieve the effects of broad industrialization prospects, improved density and strength, and convenient feeding.

Active Publication Date: 2017-11-17
EAST CHINA UNIV OF SCI & TECH
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to solve the existing problem of lack of research on the preparation process route of magnesium oxide pellets and overcome the defic

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite binder and powder pellet obtained through same
  • Composite binder and powder pellet obtained through same
  • Composite binder and powder pellet obtained through same

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0117] According to the preparation method of the present invention, the green balls need to be dried before sintering, so that the green balls can withstand the temperature stress and anti-dropping ability of subsequent sintering, so as to avoid the destruction of the pellet structure. The drying is carried out in an oven, the drying temperature is 100-150°C, and the drying time is 5-7h.

[0118] According to the preparation method of the present invention, in order to crystallize magnesium oxide, grain growth is promoted. In the present invention, the sintering temperature is 1000-1300° C. and the time is 10-30 minutes, which can make the magnesium oxide pellets have higher strength.

Embodiment 1

[0121] This example is used to illustrate the magnesium oxide pellet binder and the pellet preparation method thereof of the present invention.

[0122] The magnesium oxide purity of used magnesium oxide powder raw material is the MgO of 92.5wt%, with sodium carboxymethyl cellulose 20g, humic acid 30g, cornstarch 30g, acrylic resin 30g, syrup 20g, polyvinylpyrrolidone 20g, polyacrylamide 20g, 40g of sodium silicate, 40g of slaked lime and 0.9kg of water are prepared into colloidal binder and mixed with 8.8kg to obtain a mixture.

[0123] The mixture was poured into a briquetting machine, and the briquettes were pressed using a briquetting machine (molding pressure 10 MPa) to obtain green pellets with a size of Φ30×15 mm. Then the green pellets were dried in an oven at a drying temperature below 100° C. for 5 hours to obtain dry pellets. Place the dry pellets in a temperature-programmed furnace, raise the temperature to 1100°C at a rate of 4°C / min, keep the temperature constan...

Embodiment 2

[0125]This example is used to illustrate the magnesium oxide pellet binder and the pellet preparation method thereof of the present invention.

[0126] The magnesium oxide purity of used magnesium oxide powder raw material is the MgO of 94.4wt%, with sodium carboxymethylcellulose 30g, humic acid 40g, cornstarch 40g, acrylic resin 30g, syrup 40g, polyvinylpyrrolidone 30g, polyacrylamide 35g, 50g of sodium silicate, 45g of slaked lime and 1.0kg of water are prepared into colloidal binder and mixed with 8.7kg to obtain a mixture.

[0127] The mixture was poured into a briquetting machine, and the briquettes were pressed using a briquetting machine (molding pressure 15 MPa) to obtain green pellets with a size of Φ30×15 mm. Then the green pellets were dried in an oven at a drying temperature below 100° C. for 5 hours to obtain dry pellets. Place the dry pellets in a temperature-programmed furnace, raise the temperature to 1200°C at a rate of 4°C / min, keep the temperature constant ...

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

No PUM Login to view more

Abstract

The invention relates a composite binder and a powder pellet obtained through the same, in particular to a binder used for preparing a powder pellet, especially a magnesium oxide pellet binder, and the pellet of the binder. The composite binder and the powder pellet are characterized in that the composite binder comprising sodium carboxymethylcellulose, humic acid, corn starch, acrylic resin, syrup, polyvinylpyrrolidone, polyacrylamide, sodium silicate and slaked lime is prepared; a magnesium oxide powder raw material is mixed with the composite binder to obtain a mixed material; then the mixed material is subjected to pellet pressing, drying and sintering, and then a finished pellet product is obtained; and the magnesium oxide powder raw material is high-purity magnesium oxide, and the MgO chemical component of the magnesium oxide powder raw material is larger than 92 wt%. The powder pellet or the magnesium oxide pellet obtained through the composite binder is high in strength and not prone to being broken in the electric smelting process, the preparation technology is simple and can be directly applied to industrial mass production, and furnace condition deterioration and environmental pollution which are caused by the fact that powder directly enters a furnace are avoided; and the magnesium oxide pellet prepared through the binder can be directly used for preparing electric smelting magnesia.

Description

technical field [0001] The present invention relates to a composite binder, specifically, the present invention relates to a composite binder for preparing powder pellets (ore) and powder pellets obtained from the composite binder, more specifically, the present invention The invention relates to a composite binder for preparing magnesium oxide pellets and magnesium oxide pellets obtained from the composite binder. The powder pellets have high strength, are not easily broken during the electric melting process, and have a simple preparation process, can be directly applied to large-scale industrial production, and avoid the deterioration of the furnace condition and the pollution to the environment caused by the powder directly entering the furnace. Background technique [0002] As the basic raw material for the production of alkaline refractories, fused magnesia has good high temperature stability, corrosion resistance and thermal conductivity, and is widely used in steel, ...

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): C22B1/242
CPCC22B1/242
Inventor 路贵民张蓉蓉王榕艳刘源滔周佳芬于建国
Owner EAST CHINA UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap