Anti-oxidation protective agent for composite roll

Abstract

The invention discloses an anti-oxidation protective agent for a composite roll. The anti-oxidation protective agent comprises, by weight, 5-15 parts of quartz sand, 15-25 parts of fluorite, 10-20 parts of borax pentahydrate, 22-35 parts of soda ash and 10-20 parts of wollastonite. Once the anti-oxidation protective agent is applied, a large amount of gas is given out, each die cavity is full of the gas, air is pushed out, and oxygen is isolated. As an anti-oxidation agent reaction proceeds, gas is constantly given out, and the die cavities are in an oxygen-free state in the centrifugal casting process. Along with the reaction under high temperature, the anti-oxidation agent gradually gets into a glassy state, has lower viscosity and surface tension and is perfectly attached to the surface of liquid metal, oxygen is further isolated, and slag falling is prevented. A material in a glassy state is lower in density and floats upwards more quickly and more thoroughly when inner metal is cast, and slag inclusion is avoided. The specific gravity and the density are low, the one-shot usage amount of the anti-oxidation protective agent is only equivalent to 80% that of O type glass scum by weight, and cost performance is higher.

Description

technical field [0001] The invention relates to an anti-oxidation product for rolls, in particular to an anti-oxidation protective agent for composite rolls. Background technique [0002] In the prior art, the anti-oxidation protective agent for composite rolls is glassy (clinker), which is called O-slag (abbreviated as O-type glass scum) in the industry. Particles around 10 mesh. However, the existing anti-oxidation protective agent has the following disadvantages: 1. The process is cumbersome, it is difficult to control the quality, and the yield is low; Low carbon, not environmentally friendly. 4. The competition is fierce and it is difficult to guarantee the quality. Contents of the invention [0003] The purpose of the present invention is to provide a powdery anti-oxidation protective agent, which does not need to be melted at high temperature, but only needs to mix various mineral raw materials and chemical raw materials according to a certain mass ratio. [000...

AI Technical Summary

Problems solved by technology

However, the existing anti-oxidation protection agent has the following disadvantages: 1. The process is cumbersome, it is difficult to control the quality, and the yield is low; 2. Sometimes it causes slag inclusion defects in the composite roll, resulting in the scrapping of the finished product; low carbon, not environmentally friendly

4. The competition is fierce and it is difficult to guarantee the quality