Disclosed is a trolley sealing device for a flue gas circulation system of a sintering machine, including a cover body covering a top surface of a sintering machine trolley. A top end of the cover body is provided with communication assemblies, and the communication assemblies communicate an inner cavity of the cover body with an outside environment; two ends of the inner cavity of the cover body are fixedly connected with vertical adjusting sections respectively, and a sealing device is arranged between the vertical adjusting sections and two ends of the top surface of the sintering machine trolley; and the cover body includes a plurality of frameworks; the plurality of frameworks are arranged above the sintering machine trolley, the communication assemblies are arranged on the frameworks, and skins are fixedly connected with the frameworks; and thermal insulation layers are arranged outside the skins.

Techniques for utilizing excess heat generated by an oven to generate electricity are provided. In one example, an oven can comprise a coolant pathway positioned adjacent to a hollow space within the oven, wherein the hollow space can contain heat. The oven can also comprise a chamber in fluid communication with the coolant pathway. The oven can further comprise a turbine in fluid communication with the chamber and an outlet. Moreover, the oven can comprise a generator connected to the turbine, wherein rotation of the turbine can power the generator.

A system and method for recovering sulfur in a copper smelting process includes removing fine dust from high-concentration SO.sub.2 flue gas from a matte smelting furnace, introducing the flue gas into a fluidized bed carbothermic reduction tower to be reduced by a carbon-based reducing agent to obtain reducing gas, passing the reducing gas through a high temperature separator to separate down unsaturated powder coke contained in the reducing gas, and condensing the reducing gas to obtain sulfur. The saturated powder coke entrained in the reducing gas enters a desorption tower to desorb SO.sub.2 gas therein, and the desorbed powder coke enters a fluidized bed sulfur reduction tower to continue to participate in the reduction reaction. Part of the SO.sub.2 gas discharged from the desorption tower is discharged to the fluidized bed carbothermic reduction tower to produce sulfur, and the other part enters a desulfurization tower.

A system and method for recovering sulfur in a copper smelting process, in which fine dust is removed from high-concentration SO.sub.2 flue gas from a matte smelting furnace, the flue gas is introduced into a fluidized bed carbothermic reduction tower and reduced by a carbon-based reducing agent to obtain reducing gas, which is introduced into a high temperature separator. The separated reducing gas contains unsaturated powder coke, and the reducing gas is condensed to obtain sulfur. The saturated powder coke entrained enters a desorption tower to desorb SO.sub.2 gas, and the desorbed powder coke enters a fluidized bed sulfur reduction tower. Part of the SO.sub.2 gas discharged from the desorption tower is discharged to the fluidized bed carbothermic reduction tower to produce sulfur, and the other part is introduced into a desulfurization tower.

The disclosure relates to a method for opening up electrochemical energy storage devices in connection with a subsequent recovery of valuable materials contained therein as secondary raw materials, in which method the energy storage devices are opened up by means of a thermal treatment system to remove the electrolytes and reactive substances, before the thermally treated material is subjected to processing, whereby secondary raw materials in the thermally treated material are separated from one another. The thermal treatment is performed in an indirectly heated furnace 2 under atmospheric pressure conditions or a slight overpressure relative to the ambient pressure of up to 20 mbar in a reducing atmosphere, and influence is exerted on the course of the thermal treatment process via the reducing atmosphere, as a control variable. Furthermore, a thermal treatment system is described for removing electrolytes and reactive substances in electrochemical energy storage devices and consequently for pyrolytic opening.

A method of melting a charge in a double-pass tilt rotary furnace having a door, including operating a first burner at a first firing rate, the first burner being mounted in a lower portion of the door and producing a first flame having a length; operating a second burner at a second firing rate, the second burner being mounted in an upper portion of the door and producing a second flame having a length, the second flame being distal from the charge relative to the first flame; in an initial phase when the solids in the charge impede the first flame, controlling the second firing rate to be greater than the first firing rate; and in an later phase after melting of the solids in the charge sufficiently that the first flame is not impeded, controlling the first firing rate to be greater than the second firing rate.

A method of producing clinker from cement raw meal, includes preheating cement raw meal in a preheater string, the preheater string including a plurality of preheater stages, pre-calcining preheated raw meal in a pre-calciner to obtain a pre-calcined product, introducing the pre-calcined product into a rotary kiln for calcining the pre-calcined product to obtain cement clinker, wherein a partial flow of at least partly preheated raw meal is diverted from the preheater string, introduced into a calcination device and at least partially decarbonated in the calcination device in order to obtain an at least partially decarbonated product and CO.sub.2, wherein the calcination device is heated by electrical energy, and wherein the at least partially decarbonated product is fed into the rotary kiln and the CO.sub.2 is drawn off from the calcination device.

A process for the production of direct reduced iron (DRI), with or without carbon, using hydrogen, where the hydrogen is produced utilizing water generated internally from the process. The process is characterized by containing either one or two gas loops, one for affecting the reduction of the oxide and another for affecting the carburization of the DRI. The primary loop responsible for reduction recirculates used gas from the shaft furnace in a loop including a dry dedusting step, an oxygen removal step to generate the hydrogen, and a connection to the shaft furnace for reduction. In the absence of a second loop, this loop, in conjunction with natural gas addition, can be used to deposit carbon. A secondary carburizing loop installed downstream of the shaft furnace can more finely control carbon addition. This loop includes a reactor vessel, a dedusting step, and a gas separation unit.

The invention relates to a plant complex for steel production comprising a blast furnace for producing pig iron, a converter steel mill for producing crude steel and a gas-conducting system for gases that occur when producing the pig iron and/or producing the crude steel. According to the invention, the plant complex additionally has a chemical plant or biotechnological plant, connected to the gas-conducting system, and also energy storage for covering at least part of the electricity demand of the plant complex. Also the subject of the invention is a method for operating the plant complex.

According to an embodiment, a semiconductor manufacturing apparatus includes a holder configured to hold a processing object, a heater provided at the holder and configured to heat the processing object, a first exhaust port provided above the holder and facing the holder, and an exhaust duct. The exhaust duct is provided on an outer side surface of the first exhaust port and includes an extension and contraction function.