Integral cellular fire-resistant hearth for fuel gas cupola furnace

A cupola and refractory furnace technology, applied in the field of cast iron smelting, can solve problems such as cumbersome operation, burnout of the grate, and increased production costs, and achieve the effects of saving water resources, increasing the furnace temperature, and improving work safety

Inactive Publication Date: 2015-04-22
李明弟
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although gas-fired cupolas have made significant progress in environmental benefits compared with traditional coke cupolas, the water-cooled grate consumes a lot of water and power, not only takes about 10-15% of the heat away from the combustion chamber, but also is extremely cumbersome to operate , once the operation is careless, it is easy to burn through the grate and cause serious accidents. In addition, the refractory ball is a consumable material, and the consumption of iron material per ton is 3-4%, and the production cost will also increase accordingly.

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
  • Integral cellular fire-resistant hearth for fuel gas cupola furnace
  • Integral cellular fire-resistant hearth for fuel gas cupola furnace
  • Integral cellular fire-resistant hearth for fuel gas cupola furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] An embodiment of an integral honeycomb refractory hearth for a gas cupola, replacing the water-cooled grate and refractory balls of a 2t / h gas cast iron furnace: the hearth height H1 is 600mm; the thickness of the hearth shell boiler steel plate is 6mm; the refractory castable is made of 82% neutral alumina powder and 12% silicon carbide powder are base materials, 5% pure calcium aluminate cement is a non-sintering binder, and 1% metal aluminum powder, boric acid and sodium tripolyphosphate are composite additives; The radius of the annular convex and concave groove on the upper part of the refractory bed is R40mm, the diameter of the gas flow channel is 30mm, the spacing is 50mm, the diameter of the molten iron and the molten slag flow channel is 20mm, and the spacing is 40mm; the arch height H2 is 300mm.

[0022] Application effect: The tapping temperature can be stabilized at about 1450℃, and it can be used continuously for 12 hours.

Embodiment 2

[0024] An embodiment of an integral honeycomb refractory hearth for gas cupola, replacing the water-cooled grate and refractory balls of a 3t / h gas cast iron furnace: hearth height H1 is 700mm; hearth shell boiler steel plate thickness 7mm; refractory The composition of the base material, non-sintering binder and composite additive is the same as that of Example 1. The radius of the annular convex and concave groove on the top of the refractory bed is R50mm, the gas flow channel diameter is 35mm, the spacing is 55mm, the molten iron and slag flow channel The diameter is 25mm, the spacing is 45mm; the height H2 of the dome is 320mm.

[0025] Application effect: The tapping temperature can be stabilized at about 1500℃, and can be used continuously for 10 hours.

Embodiment 3

[0027] An embodiment of an integral honeycomb refractory hearth for gas cupola, which replaces the water-cooled grate and refractory balls of a 5t / h gas cast iron furnace: hearth height H1 is 800mm; hearth shell boiler steel plate thickness 8mm; refractory material consists of The composition of the base material, non-sintering binder and composite additive is the same as that of Example 1. The radius of the ring-shaped boss and groove on the top of the refractory bed is R60mm, the diameter of the gas flow channel is 40mm, the spacing is 60mm, the molten iron and slag flow channel The diameter is 30mm, the spacing is 50mm; the dome shape H2 is 350mm.

[0028] Application effect: The tapping temperature can be stabilized at around 1550℃, and it can be used continuously for 8 hours.

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
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to an integral cellular fire-resistant hearth for a fuel gas cupola furnace. According to the hearth, the high-temperature fire-resistant castable integral forming and normal-temperature hardening burn-free technology is adopted, by means of the cellular runner structure, the structural design of an annular round boss and a groove, and optimization of the bottom arch-shaped structure, fuel gas, molten iron and slag are ascended and descended through respective runways, direction contact between the fuel gas and the molten iron is reduced, and the burning loss of an alloy element is reduced. The fire-resistant hearth can effectively replace a water-cooling grate bar and a fire-resistant ball in the modern fuel gas cupola furnace, a large amount of water resources can be saved, the energy consumption can be reduced by 10-15%, the operation safety is improved, and the tapping temperature is increased.

Description

Technical field [0001] The invention relates to the technical field of cast iron smelting, in particular to an integral honeycomb refractory hearth for a gas cupola. Background technique [0002] A typical modern gas cupola is mainly composed of three elements: a combustion chamber, a water-cooled grate and a refractory ball. Among them, the combustion chamber mixes gas and air through the burner to provide enough heat for the cupola, and melts the metal charge through the rising hot air flow; the water-cooled grate holds up the refractory ball and charge to form a certain combustion space; The refractory bed is composed of 3-6 layers of refractory balls (also known as ceramic balls) with a diameter of 120-150 mm, which play the role of heat storage and conduction, and form a certain height of superheat and melting zone in the cupola to ensure continuous melting of the charge , To obtain the required molten iron temperature. Obviously, the water-cooled grate and the refractory ...

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): F27B1/08F27B1/10F27B1/14
Inventor 李强李明弟
Owner 李明弟
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