Abstract: Closed apparatus and processes by which carbon feedstock is composed of a mixture of non-coking coal fines and another carbonaceous material, such as waste coke fines, are described. The coal and coke fines are mixed together and may be formed into solid pieces. The mixture alone or as solid pieces is fired through pyrolyzation into solid pieces of coke, with solid and gaseous by-products of pyrolyzation being recycled for use within the coke-producing closed system, thereby reducing or eliminating release of undesirable substances to the environment. A char-forming binder may or may not be added to the carbon mixture prior to pyrolyzation.

Abstract: A detector for mounting to an air filter provides a signal if the filter is dirty. The detector has a housing mounted to the air filter. The housing has a cavity with a diaphragm. An upstream air inlet leads from an exterior of the housing to an upstream side of the diaphragm. A downstream air inlet leading from the exterior of the housing to a downstream side of the diaphragm. A stationary electrical contact is stationarily mounted in the cavity and normally spaced from the downstream side of the diaphragm. A movable electrical contact is mounted to the downstream side of the diaphragm for movement therewith. An electrical circuit is connected to the electrical contacts, so that movement of the diaphragm due to a sufficient difference in air pressure between the upstream and downstream air inlets causes the contacts to engage each other and causes the electrical circuit to provide a signal.

Abstract: Closed apparatus and processes by which carbon feedstock, is composed of a mixture of non-coking coal fines and another carbonaceous material, such as waste coke fines are disclosed. The coal and coke fines are mixed together and may be formed into solid pieces. The mixture alone or as solid pieces is fired through pyrolyzation into solid pieces of coke, with solid and gaseous by-products of pyrolyzation being recycled for use within the coke-producing closed system, thereby reducing or eliminating release of undesirable substances to the environment. A char-forming binder may or may not be added to the carbon mixture prior to pyrolyzation.

Abstract: Closed apparatus and processes by which carbon feedstock, is composed of a mixture of non-coking coal fines and another carbonaceous material, such as waste coke fines are disclosed. The coal and coke fines are mixed together and may be formed into solid pieces. The mixture alone or as solid pieces is fired through pyrolyzation into solid pieces of coke, with solid and gaseous by-products of pyrolyzation being recycled for use within the coke-producing closed system, thereby reducing or eliminating release of undesirable substances to the environment. A char-forming binder may or may not be added to the carbon mixture prior to pyrolyzation.

Abstract: Closed apparatus and processes by which carbon feedstock, is composed of a mixture of non-coking coal fines and another carbonaceous material, such as waste coke fines are disclosed. The coal and coke fines are mixed together and may be formed into solid pieces. The mixture alone or as solid pieces is fired through pyrolyzation into solid pieces of coke, with solid and gaseous by-products of pyrolyzation being recycled for use within the coke-producing closed system, thereby reducing or eliminating release of undesirable substances to the environment. A char-forming binder may or may not be added to the carbon mixture prior to pyrolyzation.