John H Juzwiak

52117502, May 18, 1993

Jun 19, 1991

7/717528

Charles L. Smith - Conshohocken PA
John J. Juzwiak - Ivyland PA

Conversion Systems, Inc. - Horsham PA

C04B 202
C04B 1806

106710

An abrasion resistant synthetic aggregate made from an intimately intermixed combination of lime, fly ash and sulfate/sulfite sludge (e. g. FGD sludge), mixed to the point where the mixture is nearly optimum density and compressible or non-compressible and plastic. This mixture is placed in a landfill. After a relatively brief cure period, the landfill is ripped and the material is crushed and graded. The aggregate, which in some instances may qualify as a light weight aggregate, has a Los Angeles Abrasion Resistance of less than 60%, and may in some cases be less than 50% (medium particles passing) according to that test.

53402146, Aug 23, 1994

Dec 2, 1992

7/984907

John H. Juzwiak - Ivyland PA

Conversion Systems, Inc. - Horsham PA

B01F 704

366292

An improved pug mill mixer including at least one homogenizer shaft extending transverse to the direction of the pug mill shafts for providing a zone of high shear mixing. The pug mill mixer of the present invention is particularly well-suited to mix dry, fine powders with liquids and pasty, sticky sludges, such as flue gas desulfurization (FGD) sludge. The mixer includes a container, within which is disposed at least one pug mill shaft having a series of pug mill paddles coupled to and radially protruding from the pug mill shafts for mixing the mixture and transporting the mixture along the pug mill shafts. The homogenizer shafts extend in a direction transverse to the pug mill shafts. Homogenizer mixing elements are coupled to and radially protrude from the homogenizer shafts. The homogenizer shafts rotate at a relatively high speed for producing a zone of high shear mixing.