Cold bonded pellet and method of producing the same

A ball-forming and cold-setting technology, applied in the field of cold-solidified iron balls and their forming, can solve the problems of limited use range, low compressive strength, breakage, etc. The effect of reducing production costs

Inactive Publication Date: 2008-09-24
尚国洪
View PDF2 Cites 67 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the common problems are: some raw materials need to be dried, the hardening speed of the formed product is slow, the curing time is long, and the compressive strength is low
In the process of storage, transportation and use, the damage is serious, and its dust is easy to cause secondary pollution
In order to improve the strength, dryin

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

[0018] Weigh 60% of dedusting ash and dust sludge with a particle size of 0.2mm, 17% of ore powder, and 14% of iron sheet; then weigh 3% of magnesium chloride and 6% of magnesium oxide with a particle size of 0.02mm. Put the weighed components into a mixer and mix them well, then press them into a mechanical ball press. According to the molding pressure of the briquetting machine, the molding water content is 5-12%, and it can be dried naturally after molding.

Embodiment 2

[0020] Weigh 8% of dedusting ash and dust mud with a particle size of 8mm, 40% of iron sheet, 15% of concentrate powder, and 32% of other iron-containing miscellaneous materials; then weigh 2.5% of magnesium chloride with a particle size of 0.08mm, and 1.6% of magnesium oxide. %, methyl cellulose 0.9%. After each component is well mixed in the mixer, put it into a ball press machine for pressing and molding, the molding water content is 5-12%, after molding, it is cured at room temperature and dried naturally.

[0021] According to the cold-consolidated pellets produced in Example 1 or 2, the average compressive strength reaches 4500N / piece; the drum index+6.3mm is 91%; the degree of reduction (RI) reaches 97%; the wear resistance index-0.5mm <7% of low-temperature reduction pulverization +3.15mm ≥86%. Compared with sintered pellets: the compressive strength is twice the standard of the first-grade product; the thermal reduction degree, drum index, and anti-wear index all rea...

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 provides a cold-bonded pellet used on the raw material of steelmaking or ironmaking and a preparation method thereof. The component and the mass ratio of the cold-bonded pellet are as follows: 8 to 60 percent of precipitator dust and dust sludge, 20 to 85 percent of iron sheet, concentrate powder and iron-bearing auxiliary material, 0.4 to 15 percent of binder. In the preparation method, the moisture in raw material is utilized to directly mix the raw material with other components in a mixer, then the mixture is pressed and formed via a briquetting press after uniform mixing, and the pellet after forming is maintained at room temperature and dried naturally. The cold-bonded pellet of the invention has the advantages of the simple forming process, the low fabrication cost, the rapid hardening of pellet and taking the short time, the high compressive strength, achieving not only the waste recycling and reducing the environmental pollution, but also the high granulation rate, the low damage rate, the wide applicability and the stable quality. The invention is especially suitable for wide application in sintering plant, ironmaking plant and steelmaking plant.

Description

technical field [0001] The invention relates to a high-strength cold-consolidated pellet used in steelmaking or ironmaking, specifically a cold-consolidated iron pellet used in ironmaking to replace pellets, steel scrap in steelmaking or used as a slagging agent and its forming method. Background technique [0002] In ferrous metallurgical production, both steelmaking and ironmaking require corresponding raw materials. The main furnace materials for steelmaking are pig iron and steel scrap. Due to limited resources and quantity, the production cost is relatively high. The raw materials for blast furnace ironmaking are still mainly sintered ore and pelletized ore. Since the ore has undergone a series of production processes such as mining, beneficiation, pelletizing and sintering, ironmaking enterprises have a large investment and increased energy consumption. [0003] In order to develop new smelting raw materials, a reduction shaft furnace or rotary kiln, rotary hearth fu...

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
Inventor 尚国洪
Owner 尚国洪
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