Regeneration of Used Fused Ceramic Sand

Increasing Recognition of Fused Ceramic Sand 

With the continuous rapid development of foundry industry, requirements of production technology, casting quality and labor environment have been improved. Casting scholars is not satisfied with the common use sands at present, so they have begun to use Fused Ceramic Sand to replace it. 

Fused Ceramic Sand is a new kind of artificial sand and it is spherical Fused Ceramic Sand has been successfully used in high manganese steel casting and large steel castings, etc. because of its satisfactory performance.

The Technology of Fused Ceramic Sand's Regeneration

In this article, the technology of regenerating used ceramic sand agglomerated with alkaline phenolic resin is studied. Two regeneration process have been taken after analyzing the characteristics of Fused Ceramic Sand and binder, which are wet regeneration and thermal regeneration. 24h tensile strength and LOI of regeneration Fused Ceramic Sand is also performed in this paper, finally, results were got as follows.

The best technological parameters of wet regeneration is that: the temperature of the mixture of sand and water is 60°C , the number of scrubbing is 6 times, mass ratio of the sand and the water is1:1.5, stirring 20min. Reclaimed sand is round shape, and there is no obvious change on particle size. Particle surface is clean, and there is no fluctuate on it. Alkaline phenolic resin has been almost removed, and just a small amount of binder residues in the micro holes. The LOI of reclaimed sand is 1. 975%, and its 24h tensile strength is 0. 673MPa, various performance of regeneration Fused Ceramic Sand is close to the new sand.

The best technological parameters of thermal regeneration is that: holding time is 20 min and heating temperature is 550 C. Reclaimed sand is round shape, and particle surface is clean. LOI of regeneration ceramic sand is 0.51 %, and it show the original surface. There is a small amount of binder remain on the surface of sand which is acicular alkaline phenolic resin.

Wet regeneration method and thermal regeneration method

There is a small amount of needle alkaline phenolic resin on the surface of regeneration Fused Ceramic Sand which is reclaimed by thermal regeneration. The surface of regeneration Fused Ceramic Sand is clean, and there is a small amount of binder residues in the micro holes. The performance of regeneration Fused Ceramic Sand which is reclaimed by thermal regeneration is more outstanding than wet regeneration But sewage is needed to deal with which is produced by wet regeneration. The equipment of thermal regeneration is simple structure and convenient manipulation. The equipment of wet regeneration covers an area of large, and its structure is complex. Thermal regeneration converts electrical energy into heat energy, and then used Fused Ceramic Sand is high temperature calcined by costing fuel. Wet regeneration converts electrical energy into mechanical energy, and then used Fused Ceramic Sand is scrub softly.