High-strength casting material for runner swinging sliding nozzle and preparation method of high-strength casting material
A technology of swinging nozzles and castables, which is applied in the field of refractory materials industry, can solve the problems of reducing the high-temperature strength of castables, and achieve the effect of improving high-temperature strength and increasing high-temperature strength
Active Publication Date: 2013-12-18
YIXING REFRACTORY EQUIP & MATERIAL FACTORY
View PDF4 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Conventionally used castables, due to the use of refractory cement as a binder and the introduction of calcium oxide, are transformed into calcite feldspar with low melting characteristics at high temperatures. The melting point is only 1593 ° C, which reduces the high temperature strength of castables. At 1400 ° C The strength is almost zero
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1-4
[0019] The chemical composition and weight percentage content of a high-strength iron channel swing nozzle castable are shown in Table 1, Examples 1-4.
[0020] 1. Physical and chemical performance indicators of raw materials
[0021] The physical and chemical indicators of super bauxite are: Al 2 o 3 ≥88%, SiO 2 ≤6%, Fe 2 o 3 ≤1.5%, bulk density ≥3.3g / cm 3 ;
[0022] The physical and chemical indicators of silicon carbide are: SiC≥98%, C≤0.5%, Fe 2 o 3 ≤0.5%;
[0023] The physical and chemical indicators of andalusite are: Al 2 o 3 ≥57%, SiO 2 40~42%, Fe 2 o 3 ≤1%, refractoriness ≥1800℃;
[0024] The physical and chemical indicators of silica fume are: SiO 2 ≥96.0%, Al 2 o 3 ≤1.0%, Fe 2 o 3 ≤1.0%, PH value 5~8, particle size ≤0.002mm;
[0025] The composite binder is composed of 30-40% sodium carboxymethyl cellulose and 60-70% water-soluble solid phenolic resin by weight percentage, which are uniformly mixed in advance.
[0026] The steps of a preparation...
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
| Property | Measurement | Unit |
|---|---|---|
| density | aaaaa | aaaaa |
| flame retardant | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a high-strength casting material for a runner swinging sliding nozzle and a preparation method of the high-strength casting material. The high-strength casting material can bear the impact of molten iron at high temperature of 1,400 DEG C. The casting material comprises the chemical components: super-grade bauxite, silicon carbide, andalusite, tabular corundum, activated alumina, silica fume, anti-explosion fibers, a polycarboxylate super-plasticizer, a compound bonding agent and additional water. The preparation method of the casting material comprises the following steps: granulating crushed super-grade bauxite caked clinkers; preparing all raw materials according to the chemical components of the casting material, and checking physical and chemical indicators; distributing and mixing the raw materials according to the chemical components of the casting material. By replacing fireproof cement with the silica fume, the growth of gehlenite with a low-melting characteristic in a high-temperature state is avoided, and the high-temperature strength of the casting material is improved; fine andalusite particles are converted into mullite at high temperature, and the high-temperature strength of the casting material is also improved; by the adoption of the compound bonding agent, the problems of low normal-temperature strength, low solidification speed, long de-molding time and the like are solved.
Description
technical field [0001] The invention relates to the field of refractory material industry, in particular to a high-strength castable for iron ditch swinging nozzles and a preparation method thereof. Background technique [0002] The iron trough swing nozzle is installed under the casthouse of the blast furnace, and its function is to inject the molten iron flowing out through the iron trough into any molten iron tank under the casthouse platform. The advantages of setting the swing nozzle are: the length of the iron ditch is shortened, the layout of the casthouse is simplified, and the work of repairing the iron ditch is reduced. The outer shell of the swing nozzle of the iron ditch is welded by steel plates, and the inner refractory brick is used as a safety lining, and the working layer is Al 2 o 3 -SiC-C refractory castable, directly in contact with molten iron. Since the high-temperature molten iron from the iron gutter directly impacts the working layer of the swingi...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 李志坚吴锋安刚张丹丹王林
Owner YIXING REFRACTORY EQUIP & MATERIAL FACTORY