Refractory materials and refractory equipment for aluminum alloy melt casting, and method for preparing refractory equipment

Abstract

The invention discloses a fire-resisting material used for aluminum alloy fusion casting, and a fire-resisting apparatus made of the fire-resisting material and a method for preparing the fire-resisting apparatus, wherein the fire-resisting material comprises aluminum silicate fiber powder, talcum powder, mullite powder, zirconite powder and a silica sol solution. The fire-resisting material has the advantages of no aluminum adhesion and no chemical reaction with an aluminum liquid, no addition of asbestos, rapid deslagging and no damage after using a prefabricated molding assembling part, better thermal-shock resistance, durability, controllable concentration, intensity and thermal-shock resistance, and small shrinkage mass of a cooling process after use to effectively prevent the assembling joint of the prefabricated molding part from cracking. The corresponding fire-resisting apparatus has the advantages of heat shock resistance, washing resistance, corrosion resistance, and small heat expansion coefficient.

Description

technical field [0001] The invention relates to a refractory material and refractory equipment for aluminum alloy melting and casting, and a preparation method of the refractory equipment. Background technique [0002] In the production process of aluminum alloy casting, many refractory equipment need to be made of refractory materials, such as transfer flow tube, aluminum liquid automatic flow control distribution boat funnel, hot top casting diverter plate, hot top casting insulation cap, etc. These existing devices have the following defects: [0003] 1. The flow pipes for round ingot transfer and flat ingot transfer pipes were first made of steel that is easily eroded by molten aluminum (casting ingots are prone to slag and iron content increases), and later changed to silicon with good thermal insulation performance and non-wetting of molten aluminum. Alumina fiber and high-temperature binder are used to synthesize medium-resistant materials. The disadvantages are: hig...

AI Technical Summary

Problems solved by technology

[0003] 1. The flow pipes for round ingot transfer and flat ingot transfer pipes were first made of steel that is easily eroded by molten aluminum (casting ingots are prone to slag and iron content increases), and later changed to silicon with good thermal insulation performance and non-wetting of molten aluminum. Alumina fiber and high-temperature binder are used to synthesize medium-resistant materials. The disadvantages are: high crystal water content, high-temperature embrittlement (low high-temperature strength), and not durable; its disadvantages are difficult to completely remove crystal water during preheating and baking. The aluminum liquid in the process is polluted by the increase of hydrogen content caused by the crystallization water vaporization slag and the chemical reaction with the aluminum liquid

[0004] 2. The aluminum liquid automatic flow control distribution boat-shaped funnel is made of clay material, and its disadvantages are: high crystal water content, high temperature preheating, easy to crack (low high temperature resistance strength), and low service life; now it is made of imported formula Insural 140 material, its The disadvantage is: the anti-staining aluminum coating layer is easily corroded by the aluminum liquid to produce corrosion pits after being worn, and the aluminum is seriously stained after several times of use.

Its disadvantages are: rough surface, poor thermal insulation performance, easy to stick to aluminum, and difficult to remove slag; when using it, it needs to be protected by spraying paint every time to prevent aluminum from sticking, but it is extremely difficult to dry thoroughly after the water in the paint is immersed in the lining, and it is easy to contaminate aluminum liquid

Its disadvantages are: high crystal water content; low strength; asbestos products are materials that are banned by many countries at home and abroad and are extremely harmful to human health. The industrial waste products are gradually reduced in energy conservation and emission reduction due to their great environmental pollution. One of the materials used until phase out