1.When preparing large-scale carbon steel or manganese steel castings, chromite sand or silt sand, quartz sand or old sand is used as the back sand. The requirement for silt sand is calculated as 2 inches of silt sand per inch of thick casting.
What are the characteristics of chromite sand in casting and the formulation of casting preparation
2.The binder and desiccant must be mixed first, then the chromite sand is added, and then thoroughly mixed to ensure that the binder is properly coated with grit, and the crosslinking agent is added and fully ground.
What are the characteristics of chromite sand in casting and the formulation of casting preparation
3.The acid demand of chromite furan resin sand is about 10 times that of quartz sand. The acid should be added first to cover the sand, then the resin should be added until the mixing and grinding are complete.