摘要:
The invention relates to an apparatus for treating aluminum comprising at least one device for mixing (20, 22, 30. 40) aluminum ore with limestone and sodium and/or potassium carbonate to obtain a mixture and a calcination reactor (60) for producing the calcine. A circulating fluidized bed reactor (50) is arranged between the device for mixing(20, 22, 30. 40) and the calcination reactor (60) and in which the mixture is pre-calcined.
摘要:
The invention is directed to a process and its relating plant for roasting gold bearing sulfide concentrate. Concentrate particles with a carbon content of more than 0.5 wt-% are fed into a roaster where they are thermally treated at a temperature in the range of 500 and 1000 °C in a fluidized bed to form a calcine, and wherein at least parts of the calcine are withdrawn from the roaster together with a gas stream as a solid fraction. Concentrate particles with a diameter at least 50 % smaller than the average diameter of the concentrate particles are separated as small particles and/or particles from the gas-solid-fraction are separated in at least one step as small calcine particles. The small particles and/ or at least part of the small calcine particles are pelletized, whereby at least 80 % of the pellets feature a diameter of at least 80 % of the concentrate particles average diameter and that the pellets are fed into the roaster (Fig. 1 ).
摘要:
The invention describes a process for calcining a mineral comprising the following steps feeding a mineral into a fluidized bed reactor (i), injecting biogas as fuel into the fluidized bed reactor (ii), burning the biogas for generating heat to calcine the mineral (iii), withdrawing calcined mineral from the fluidized bed in the reactor (iv) and withdrawing a mixture of gas and solid particles from a position above the fluidized bed (v).
摘要:
The invention is directed to the production of copper and/or cobalt sulfate from copper and/or cobalt sulfide concentrates with low sulfur contents, wherein a feed stream containing copper and/or cobalt sulfide is at least partly converted to copper and/or cobalt sulfate in a roasting stage at temperatures between 600 and 7300°C and in an oxidizing atmosphere, wherein a total waste gas stream, which contains SO 2 , is obtained and withdrawn, and wherein thermal energy and/or a sulfur-containing gas is supplied to the roasting stage as energy carrier via the feed stream and/or a fluidizing gas.
摘要:
The invention is directed to a process and its relating plant for recycling zinc oxide residues. Thereby, zinc oxide residues are granulated to particles with a size of d80 between 0,3 and 5 mm, preferably between 0.5 and 2 mm. These particles are fed into a roaster where they are thermally treated at a temperature in the range of 500 and 1.200 °C, preferably 800 to 1.100 °C in a fluidized bed to form a calcine. The zinc oxide residues are zinc oxide dusts with a particle size below d80 100 μm, preferably below d80 75 μm coming from kiln, submerges lances furnaces, ferric reduction furnaces, galvanizing and/or recycling processes, particularly recycling of steel, copper, lead, nickel and/or electronic scrap, and/or that the zinc oxide residues comes from foundry for lead and zinc, ashes and/or dross from a Zamac process, oxide zinc ash, catalysts, melting and casting of Zn and/or zinc slag.
摘要:
Presented is a fluidizing nozzle (1) for introducing fluid into a fluidized bed reactor (2) and a fluidized bed reactor (2). The fluidizing nozzle comprises a nozzle tube (3) limiting at least a part of a feed channel (4) in which fluid is configured to flow, at least one fluid discharge opening (5) arranged near a downstream end (6) of the nozzle tube (3), and a pot-like hood (7), which sealingly closes the nozzle tube (3) with a hood cover (8) of the pot-like hood (7) at the downstream end (6) of the nozzle tube (3) at which said at least one fluid discharge opening (5) is provided. The feed channel (4) is provided with a flow restriction element (10) defining at least one flow restriction feed channel (11) upstream of said at least one fluid discharge opening (5).
摘要:
The present invention describes a process for treating a leaching residue generated in a leaching of a sulfur-containing metal concentrate. Therein, the leaching residueisfed into a reactor, wherein a fluidizing gas is injected into the reactor to form a fluidizedbed containing at least a portion of the leaching residue. So, the leaching residueis heated in the presence of inert particles to a temperature between 600 and 900 °C in an oxidizing atmosphere to produce calcined particles and SO 2 . At least 60 wt-% of the inert particles are removed from the fluidized bed while at least 60 wt-%of the calcined particles are removed together with a gas stream containing off-gases and the fluidizing gas.
摘要:
The above mentioned invention describes a process for producing uranium and/or at least one rare earth element selected from the group consisting of cerium, dysprosium, erbium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium and yttrium out of an ore. The ore is mixed with sulphuric acid with an concentration of at least 95 wt.-% to a mixture, wherein the mixture is granulated to pellets. The pellets are fed into at least one fluidized bed fluidized by a fluidizing gas for a thermal treatment at temperatures between 200 and 1000 °C. The at least one fluidized bed is developed such that it at least partly surrounds a gas supply tube for a gas or a gas mixture fed into the reactor and the gas or gas mixture is used as a heat transfer medium.
摘要:
The above mentioned invention describes a process for removing arsenic and/or antimony sulfides from copper, nickel and/or gold containing ore particles. Ore particles are fed into a reactor, wherein a fluidizing gas is injected into the reactor to form a fluidized bed containing at least a portion of the ore particles. The ore particles are heated in the presence of inert particles to a temperature between 500 and 850 °C and are withdrawn from the reactor. At least 60 wt-% of the inert particles form a first zone of the fluidized bed and at least 60 wt-% of the ore particles form a second zone above the first zone.
摘要:
A method for the treatment of flue dusts containing arsenic and/or antimony from pyrometallurgical methods, wherein a reducing agent is added to the flue dusts, the flue dusts are heated together with the reducing agent, and volatile components are separated from a slag. The reducing agent is a carbonaceous compound.