Abstract: A novel method for the continuous production of compressed higher density black powder comprising feeding from a feed container means mealy black powder of low density enclosed between upper and lower endless belts into a precompression zone, to produce precompressed black powder, and to expell air contained in said black powder, passing the precompressed black powder through a primary compressing zone containing a primary compression means to achieve a new orientation and displacement of the said black powder, then passing the black powder through a final compressing zone containing a final compression means, while supplying the final pressure to obtain breaking or flow of the crystals as well as crystal lattice displacements of said black powder, and recovering the compressed higher density black powder, each of said primary compression means and said final compression means being capable of building-up compaction pressure as well as being capable of idling, the black powder being moved through said precomp

Abstract: Apparatus and method for producing black powder granules of a given grain size by compressing black powder meal, subjecting the compressed black powder to coarse crushing and grinding the coarse crushed black powder in a cone mill.

Abstract: A method for the production of mealy crude black powder from components consisting essentially of potassium nitrate, sulfur and carbon, all in particle form, comprises the steps of placing each component in a storage container, continuously withdrawing said components individually from said storage containers in the determined proportions, continuously feeding said separate components as particles into a circular oscillating cylindrical grinding zone consisting of at least two grinding zones rigidly interconnected and containing grinding elements, whereby said component particles are ground and mixed with each other with agglomeration of the individual component particles, and continuously withdrawing said mealy crude black powder. This mealy crude black powder is then compressed and granulated, followed optionally by further treatment such as polishing and graphitizing or grinding.