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

Rotary hearth furnace hearth structure

A rotary hearth furnace bottom, multi-layer structure technology, applied in the direction of manufacturing converters, etc., can solve the problems of hearth uplift, blade life reduction, furnace bottom refractory brick expansion, etc., to solve the problem of dimensional stability, resistance to slag corrosion Performance Effect of metal and liquid slag adhesion properties

Inactive Publication Date: 2013-07-03
HUBEI SHENWU THERMAL ENERGY TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (2) As time goes on, the continuously growing hearth forms a very hard plate composed of furnace charge and magnesia. This plate strongly rubs against the discharge screw blade, which reduces the life of the blade, and even causes the discharge screw to stop due to overload.
[0009] (4) Under the condition of high temperature above 1400 ℃, the refractory bricks at the bottom of the furnace expand severely, causing the hearth to bulge, and the corner bricks of the rotary hearth furnace are pushed out by the hearth bricks and fall off

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
  • Rotary hearth furnace hearth structure
  • Rotary hearth furnace hearth structure

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0044] It is applied in a rotary hearth furnace with a diameter of 10 meters in the Joint Laboratory of Energy Conservation and Low Carbon Technology of Beijing Shenwu Environmental Energy Technology Group Co., Ltd., and the temperature in the furnace is 1480°C. The integrated furnace bottom technology of the present invention solves the problem of furnace bottom hardening, Higher growth and burn-through problems, continuous and stable operation, used to deal with the reduction of vanadium-titanium magnetite, etc., and achieved good benefits.

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
densityaaaaaaaaaa
melting pointaaaaaaaaaa
porosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a rotary hearth furnace hearth structure. The rotary hearth furnace hearth structure which is a multilayer structure sequentially comprises, top to down, a carbon composite material layer which contains 8-45% of graphite and 92-54% of fused magnesia magnesium oxide, a carbon composite material layer which contains 8-45% of graphite and 92-54% of fused magnesia magnesium oxide, a mullite firebrick layer, a high-alumina brick layer, and a light-weight thermal-insulation brick layer. So the comprehensive hearth has a special slag erosion resistance and a metal and liquid slag adhesion resistance, and the dimension stability problem of expend with heat and contract with cold of the hearth is solved.

Description

technical field [0001] The invention relates to a refractory masonry technology at the bottom of a rotary hearth furnace, in particular to a bottom structure of a rotary hearth furnace. Background technique [0002] At present, in the field of direct reduction of iron and steel plant dust, lateritic nickel ore, vanadium-titanium magnetite and refractory iron ore, and the most advanced third-generation ironmaking technology (granulated iron), its core technology equipment is a large-scale The rotary hearth furnace has an annular rotary hearth in the furnace, and the metallurgical process of high-temperature rapid reduction of materials is completed on this rotary hearth. [0003] For large-scale industrial rotary hearth furnaces with an annual output of 20, 50, and 800,000 tons, the pursuit of high operating rate is very important for stable production, stable process and good economic benefits. In actual production, it is found that the life of the bottom of the furnace is n...

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): C21C5/48
Inventor 吴道洪王建民
Owner HUBEI SHENWU THERMAL ENERGY TECH
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