Provided is a coal briquette manufacturing apparatus including a material storage configured to store a plurality of materials for manufacturing coal briquette; a material mixer configured to mix the plurality of materials discharged from the material storage; a coal briquette manufacturer configured to manufacture the coal briquette by press-forming the materials mixed in the material mixer; and a conveyor provided to the material storage, the material mixer or the coal briquette manufacturer, and configured to transport the plurality of materials or the coal briquette, wherein the plurality of materials includes coal ashes, dolomite, and limestone, and a weight of the coal ashes is 70 to 80% of an entire weight of the plurality of materials.

Provided is a coal briquette manufacturing apparatus including a material storage configured to store a plurality of materials for manufacturing coal briquette; a material mixer configured to mix the plurality of materials discharged from the material storage; a coal briquette manufacturer configured to manufacture the coal briquette by press-forming the materials mixed in the material mixer; and a conveyor provided to the material storage, the material mixer or the coal briquette manufacturer, and configured to transport the plurality of materials or the coal briquette, wherein the plurality of materials includes coal ashes, dolomite, and limestone, and a weight of the coal ashes is 70 to 80% of an entire weight of the plurality of materials.

A furnace having a convection section with convection tubes in a convection compartment is disclosed. The convection tubes receive and preheat hydrocarbon feed primarily by convection of heat from hot flue gas that flows into in the convection section. The convection section additionally includes a perforated distributor plate that prevents flow channeling of the hot flue gas as it flows into the convection section. The furnace also includes a radiant section having radiant tubes in a radiant compartment. The radiant tubes are in fluid communication with the convection tubes so that preheated hydrocarbon feed flows from the convection section to the radiant section. The radiant section burns fuel and heats the preheated hydrocarbon feed primarily by radiation and from the hot flue gas, which flows from the radiant section into the convection section.

An arrangement for burning lime mud into lime in a lime kiln. The lime mud flows counter-currently to flue gases from a feed end to a firing end and the fuel used is flue gas that is produced by gasifying a fuel in the presence of combustion air in a gasifier. The combustion air for gasification is preheated with heat generated in lime mud combustion. The arrangement is provided with a conduit between the lime kiln and the gasifier for leading air from the lime kiln into the gasifier as combustion air. At least a portion of the combustion air for gasification is preheated with heat generated in the lime mud combustion so that air is led into cooling of lime obtained in the combustion and further into the kiln, from or through the firing end of which air is taken into the gasification.

A melting apparatus for steel production includes a support structure to support a shell for the production and tapping of steel, and a source or zone for the emission of fumes resulting from the tapping of the steel from the shell. The melting apparatus also includes a tapping hood integrated into the support structure and provided with a suction mouth positioned directly above the zone for the emission of fumes, the shell is provided with a bottom wall in which an E.B.T. is provided for tapping the steel.

Continuous annealing equipment (1) including a cleaning device (11, 12) for performing a cleaning treatment on a steel strip (S) and an annealing device (12) for performing an annealing treatment on the steel strip (S) comprises an exhaust gas passage (31, 41) through which an exhaust gas discharged from the annealing device (12) flows, a solution circulation passage (32, 51) through which a cleaning solution used in the cleaning device (11, 12) circulates, and a heat exchanger (53) which forms a part of the solution circulation passage (32, 51) and contacts with the exhaust gas.

A hood for a taphole and a tapping spout in a submerged arc furnace in the production of silicon. The hood has at least two suction ducts which are placed asymmetrically on either side of the hood, and is useful in a process for the production of silicon in a submerged arc furnace, wherein liquid silicon and refining gas escape from a taphole of a crucible, wherein the liquid silicon flows on a tapping spout into a ladle, wherein the refining gas is sucked in a hood which has at least two suction ducts which are placed on either side of the hood.

A heat-recovering oven system based on temperature gradient comprises: multiple chambers arranged in a sequence, the chambers configured for operating at various temperatures according to a temperature gradient arrangement that spans the sequence; a conveyor configured for transporting product through the multiple chambers in the sequence for heat treatment according to the temperature gradient arrangement; and multiple temperature-segregated heat exchanger systems, each heat exchanger system including a heat exchanger, a conduit to at least one of the chambers based on its temperature in the temperature gradient arrangement, and a return conduit from the at least one chamber to the heat exchanger.

Method and installation for calcining cement raw meal in a calciner whereby fuel and a calciner oxidant having an oxygen content of at least 30% vol are introduced into the calciner so as to generate either an oxidant-lean zone or a fuel-lean zone in the calciner located between the lowermost fuel inlet level and the lowermost oxidant inlet level of the calciner, between 50% and 100% by weight of the raw meal being supplied to the calciner upstream of and/or within the oxidant-lean, respectively the fuel-lean zone.

A hydrogen, lithium, and lithium hydride processing apparatus includes a hot zone to heat solid-phase lithium hydride to form liquid-phase lithium hydride; a vacuum source to extract hydrogen and gaseous-phase lithium metal from the liquid-phase lithium hydride; a cold zone to condense the gaseous-phase lithium metal as purified solid-phase lithium metal; and a heater to melt the purified solid-phase lithium metal in the cold zone and form refined liquid-phase lithium metal in the hot zone.