How is rock wool produced?

This thing looks like an old cotton quilt that has been covered for over 30 years. It is actually rock wool, although its texture is as soft as cotton, it is made of stone.

How ROCKWOOL re-engineered volcanic rock into stone wool insulation, Buildingtalk

Stone wool - IMA

How is rock wool produced

Knauf Insulation - Rock Mineral Wool Production Process

How It's Made - Stone Wool Insulation

How It's Made - Stone Wool Insulation

China Low Price Rock Wool Panel 80kg/m3 25 MM Manufacturers, Suppliers, Factory - Made in China - FANRYN

CHINA IKING INDUSTRIAL GROUP CO., LTD

CHINA IKING INDUSTRIAL GROUP CO., LTD

Stone Wool - Rock Wool - Thermal Insulation