The so-called beneficiation is the process of separating useful minerals from useless minerals. As a small mineral, the beneficiation of talc has not been given much attention. With the subdivision of talc powder application fields and more functional applications, talc beneficiation has higher economic value, and the development of technology and materials also provides technical basis for talc beneficiation.

The application of talcum powder in insulation materials mainly includes the following two directions: special peeling talcum powder for sheathed insulated wires and talcum powder filling for sheathed cables.

This article focuses on the purification of talc solid waste, using low-grade talc solid waste provided by Liaoning Xinda Talc Group Co., Ltd. as the research object, demonstrating the group's scientific research enthusiasm and innovative spirit in the field of efficient utilization of talc resources.

Application value of talc powder: As an important industrial mineral filler, talc powder is widely used in fields such as plastics, coatings, papermaking, ceramics, etc. Its quality directly affects the performance of end products. 

As an important coating filler, the particle size distribution of talc powder has a significant impact on the rheological properties, mechanical properties, optical characteristics, corrosion resistance, and construction process of coatings. 

Talc, magnesite, chlorite, and calcite are common minerals in nature, and their structural differences directly determine their physical properties and industrial applications. Xinda talc, as one of the important fillers in inorganic powders, is often associated with vein minerals such as chlorite and magnesite. 

1. Definition: Refractive Index is a dimensionless physical quantity, meaning it has no unit. It represents the ratio of the propagation speed of light in a vacuum to that in a medium (such as talc, resin, etc.), with the formula: n=C/V, where c is the speed of light in a vacuum and v is the speed of light in a medium, both in the same unit. Therefore, the ratio n is a pure numerical value.

Talc powder filled polypropylene was mixed, extruded, and injected to produce talc powder/polypropylene composite materials. The shrinkage rate of the composite materials was tested, and the mechanism of the influence of the microstructure of talc powder on the shrinkage rate of the composite materials was explored.

Calcium stearate is a common metal soap additive produced by the reaction of stearic acid with calcium hydroxide or calcium chloride. It is widely used in industries such as plastics, rubber, coatings, cosmetics, and food.