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

Non-oxide composite refractory materials for molten iron chute

A non-oxide and refractory material technology, applied in the field of refractory material manufacturing, can solve problems such as slag resistance, unfavorable iron corrosion, oxidative deterioration of steel fibers, and impact on service life, etc., to achieve short construction drying time, strong oxidation resistance, and fire resistance high degree of effect

Inactive Publication Date: 2006-09-06
BAOSHAN IRON & STEEL CO LTD
View PDF3 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But silica brings a lot of SiO 2 , which is detrimental to the slag resistance and iron corrosion of the material, thus affecting the service life; the steel fiber is added to improve the thermal shock resistance, but when the molten iron is above 1400°C, the steel fiber is easy to oxidize and deteriorate, which will affect the material performance instead.

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 Construction

[0019] Table 1 is the main composition (wt%) of the examples of the invention and the comparative examples, and Table 2 is the performance of the samples of the examples of the invention and the comparative examples.

[0020]

raw material

Example

comparative example

LX1

LX2

LX3

ASCZ1

ASCZ2

Dense corundum

50

60

70

55

56

Silicon carbide

30

22

15

33

25

Silicon nitride

3

7

10

0

7

Aluminum oxide powder

9

6

3

4.0

3.5

carbon material

5

3

1

3

3

Silicon metal

3

2

1

2

2

calcium aluminate cement

--

--

--

2

2

Silica powder

--

--

--

1.0

1.5

Anti-knock agent

+0.12

+0.08

+0.1

+0.12

+0.10

Dispersant

+0.3...

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
melting pointaaaaaaaaaa
Login to View More

Abstract

The invention relates to a technology for preparation of refractory material, and especially to a composite refractory of non-oxidized substance used in a hot-metal launder of consecutive pre-processing. The composite refractory of non-oxidized substance used in a hot-metal launder is characterized in that it contains (wt %) 50-70 % of corundum material, 15-30 % of silicon carbide, 3-10 % of silicon nitride, 3-10 % of silicon nitride tiny powder, 1-5 % of charcoal material, 1-3 % of silicon anti-oxidization agent, 6-15 % of additional silicasol astringent, and a few additives containing anti-knock agent and dispersing agent with 0.15-1.5 % by wt. The refractory material of the said invention can resist the erosion of the hot-metal and the molten ash and is of strong erosion ability, uniform and high-integrity structure, high intensity at a medium-high-temperature, strong stability of resistance to heat shocks and of volume of material, and strong resistance to oxidation, so it adapts to the process requirement of the desired hot-metal launder of consecutive pre-processing.

Description

(1) Technical field [0001] The invention relates to a refractory material manufacturing technology, in particular to a non-oxide composite refractory material for molten iron launders in continuous pretreatment of molten iron. (2) Background technology [0002] In the iron and steel smelting process, molten iron pretreatment technology is widely used. However, the technologies currently used in the world are segmented, cross-regional, and discontinuous processes, so there are certain defects in processing efficiency, energy saving, automation, and simplification. Japan has recently put forward a brand-new concept of "continuous treatment of molten iron", through intensification and continuousization of the discontinuous desiliconization, dephosphorization and desulfurization of molten iron across regions, so as to achieve the minimum investment in equipment and the effective use of energy and resources. Purpose. [0003] Although the existing molten iron pretreatment refra...

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): C04B35/66C04B35/10
Inventor 甘菲芳石洪志
Owner BAOSHAN IRON & STEEL 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