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

A heat recovery method for treating blast furnace slag

A technology of heat energy recovery and blast furnace slag, applied in waste heat treatment, energy efficiency improvement, furnace, etc., can solve environmental pollution and other problems, achieve high granulation efficiency, increase heat transfer surface area, and reduce particle size

Active Publication Date: 2015-11-04
SCIMEE TECH & SCI CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production of steel products, a large amount of waste is also discharged, causing serious pollution to the environment

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
  • A heat recovery method for treating blast furnace slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0021] When the high-temperature blast furnace slag at a temperature of 1500°C enters the fluidized bed through the tank, the high-pressure air in the lower part of the tank blows the blast furnace slag melt to complete granulation; The cold slag meets and collides in the fluidized bed. The amount of cold slag sprayed by the cold slag nozzle at high speed accounts for 15% of the total amount of molten slag. The upward spraying angle of the cold slag nozzle is 35°. The bead flows are the same, forming an angle of 25° with each other; the slag particles after collision are violently mixed with cold air through the air distribution device for heat exchange, and the slag beads are cooled to 300°C; the cooled slag beads are used as cement raw materials, and the The vitreous body content reaches 95%, the heated heat exchange air enters the waste heat boiler, and the saturated steam generated by the waste heat boiler flows through the top of the fluidized bed for further heating, beco...

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 belongs to the energy recycling field and particularly relates to a heat recovery method for blast furnace slag in metallurgy and steel industries. The heat recovery method includes that: step one, high pressure air on the lower portion of a tank blows the blast furnace slag melt into pieces to complete granulation when the blast furnace slag melt enters a fluidized bed through the tank; step two, granulated slag particle stream in the step one meets and collides with cold slag sprayed by a cold slag nozzle at a high speed in the fluidized bed; step three, the slag particles after collision are violently mixed with cold air for heat exchange through an air distributing device, and slag beads are cooled; and step four, the cooled slag beads are transported out as the raw material of cement, heated heat exchange air enters a waste heat boiler, saturated steam stream produced by the waste heat boiler is further heated to become superheated steam when passing the top of the fluidized bed, and then the superheated steam enters a generating set to generate electricity. The heat recovery method has the advantages that the granulation efficiency is high, mutual adhesion of slag particles is reduced, and the like.

Description

technical field [0001] The invention relates to the field of energy recovery and utilization, in particular to a heat energy recovery method for processing blast furnace slag in the metallurgy and iron and steel industries. Background technique [0002] The iron and steel industry provides important basic raw materials for the development of the national economy, and is a resource-intensive industry that consumes a lot of energy and resources. While producing steel products, a large amount of waste is also discharged, causing serious pollution to the environment. Although the iron and steel industry is a major energy consumer and pollutant discharger in the national economy, it is also one of the industries with great potential for energy conservation and emission reduction. Among them, recycling all kinds of waste heat is an important breakthrough for further energy saving in the iron and steel industry. [0003] Blast furnace slag is a by-product formed from gangue in or...

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 Patents(China)
IPC IPC(8): C21B3/08F27D17/00
CPCY02P10/265Y02P10/283Y02P40/123C21B2400/026C21B2400/062C21B2400/072C21B2400/076C21B2400/08Y02P10/25Y02P40/121
Inventor 葛加坤倪明亮
Owner SCIMEE TECH & SCI CO LTD
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