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

Slag-trapping covering agent for casting and its pre-treating process

A slag collecting covering agent and pretreatment technology, applied in the field of slag collecting covering agent, can solve the problems of poor puffing, the puffed slag collecting layer hangs on the wall of the ladle, and the slag removal is not clean, so as to improve the slag collecting effect, and it is not easy to hang. Bag, easy to remove the slag effect

Inactive Publication Date: 2004-06-09
HUAZHONG UNIV OF SCI & TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The price of perlite is not expensive, and the working conditions are better when used, but there are many problems: it is sensitive to temperature when expanding, sometimes it will not expand well when the temperature of molten iron fluctuates, and unexpanded perlite may cause slag inclusion in castings during pouring danger; the puffed slag collection layer is not viscous enough, and it is easy to break when removing slag, resulting in dirty or difficult slag removal; the puffed slag collection layer is serious to the wall of the ladle
Although it has a certain effect on improving the effect of perlite, its effect is still very limited, and the introduction of glass slag or straw ash has brought some new problems

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

[0014] One embodiment of the present invention is: select high-quality perlite raw ore, artificial quartz sand, and fluorite to be crushed to 40-70 meshes; mix in proportions of 87% perlite, 10% quartz sand, and 3% fluorite. Bake at 350°C for 30 minutes, add 2% borax and 1% cryolite, and mix well. It is used for slag removal in the induction furnace and slag collection, slag removal and covering in the furnace front bag, and its effect is better than that of the existing similar products.

[0015] The casting slag collecting covering agent and the pretreatment process thereof of the present invention can be widely used in various cast iron and cast steel production processes. According to the different casting materials, the temperature of molten metal, whether it is used in the furnace or in the ladle, the addition ratio of components can be adjusted within the above ratio range to make various special slag collecting and covering agents.

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

A slag-trapping covering agent for casting, especially for front ladle or induction-type electric furnace is prepared from pearlite, quartizite and fluorite through crushing, sieving by 40-70 meshes, mixing them proportionally, baking at 200-400 deg.C for 5-60 min, and mixing with cryolite and borax. Its advantages include better puffing nature on surface of molten iron or steel, wide temp range, easy trapping slag but not breaking, and no deposit on ladle wall.

Description

technical field [0001] The invention belongs to a kind of slag collecting and covering agent used for collecting slag, removing slag and covering heat preservation in the front ladle of cast iron and cast steel furnaces, and for slag collecting and removing slag on the liquid surface in the furnace when induction electric furnace smelts cast iron and cast steel and its pretreatment process . technical background [0002] In the foundry industry of our country, there are two main types of slag collecting and covering agents used in the furnace ladle: one is straw ash; the other is perlite. Perlite or nothing is used for slag collection and slag removal in the induction furnace. Straw ash has a wide range of sources and is cheap, but its fatal shortcomings are pollution of the environment and deterioration of working conditions. As a result, its usage has continued to decline. The price of perlite is not expensive, and the working conditions are better when used, but there ...

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): B22D1/00B22D11/111
Inventor 段汉桥魏伯康林汉同
Owner HUAZHONG UNIV OF SCI & 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