Classifications

• • C—CHEMISTRY; METALLURGY
  • C21—METALLURGY OF IRON
  • C21B—MANUFACTURE OF IRON OR STEEL
  • C21B13/00—Making spongy iron or liquid steel, by direct processes
  • C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
  • C21B13/0013—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state introduction of iron oxide into a bath of molten iron containing a carbon reductant
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
  • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
  • C10J3/57—Gasification using molten salts or metals
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
  • C10J2300/00—Details of gasification processes
  • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
  • C10J2300/0913—Carbonaceous raw material
  • C10J2300/093—Coal
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
  • C10J2300/00—Details of gasification processes
  • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
  • C10J2300/0953—Gasifying agents
  • C10J2300/0959—Oxygen
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
  • C10J2300/00—Details of gasification processes
  • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
  • C10J2300/0983—Additives
  • C10J2300/0996—Calcium-containing inorganic materials, e.g. lime

Definitions

• liquid iron pig iron
• the metallic bath material here iron, and the metal to be produced are identical.
• DE-OS 30 31 680 already points out the possibility of at least partial afterburning of the coal gas produced.
• the heat generated is fed to the weld pool, which is kept at operating temperature and does not cool down.
• an excess amount of high-basicity slag is introduced into the melt bath reactor, or lime is added to the melt.
• the object of the invention is to modify and improve the known method of the type mentioned at the outset in such a way that it is possible to obtain metals other than iron and metals which are more problematic than the environment, in particular those which are more valuable.
• This object is achieved in that at least partially fuels are introduced as carbon-containing fuel in the molten bath material, which have at least a small proportion of the metal to be extracted.
• the known method for gas production and metal extraction of the type mentioned at the outset is used for the economical extraction of low-concentration valuable metals or for the removal of environmentally harmful metals.
• the high, reductive potential of the iron bath is used to advantage to remove the combustion residues of the metal-carrying fuel used to separate extracted metal.
• the ash collects in the slag layer of the iron bath reactor, while the metal obtained remains in the metal bath, especially the iron bath. Ash and recovered metal are thus separated from one another and can be removed separately.
• the particular advantage of the process according to the invention lies in the fact that the metal obtained accumulates in the melt of the bath material and is only removed after a desired concentration has been reached.
• petroleum coke with noticeable contents of, for example, nickel or vanadium can be gasified with simultaneous extraction of these metals.
• oil shale the use of which is otherwise unprofitable or which contains high amounts of metals in its mineral substance, which cannot be obtained economically in any other way.
• the further processing of products such as sewage sludge and industrial waste with moderate amounts of combustible substance is particularly advantageous because - in addition to the heat gain - metals such as copper, zinc or the like are obtained from shredder waste, etc. can, on the other hand, have environmentally problematic heavy metals separated from flammable sewage sludge, so that the environmental impact of such heavy metals is reduced.
• all materials can be processed to produce coal gas and metal, which on the one hand have a certain calorific value, but on the other hand are mixed or contaminated in some form with the metal to be extracted.
• the aim is for the metal to be recovered to be deposited in the molten bath, that is to say in particular in the iron bath, and to accumulate over a long period of operation, this desired process control cannot always be achieved. If necessary, the material to be extracted will accumulate in the slag. It can also practically never be ruled out that the metal to be extracted is in the form of particles in the dust that is carried along by the coal gas produced. It is known that gas bubbles form in focal spots of the melting bath, which always also carry a proportion of gaseous metal with them due to the vapor pressure of the metal at the gasification temperature. This metal vapor condenses or sublimates into small tinsel or droplets that float in the coal gas generated. It can therefore be advantageous to extract this metal dust from the general dust using suitable methods.
• the temperature of the molten bath reactor in addition higher fuels, especially coal, is introduced into the molten bath reactor.
• Afterburning of the coal gas produced as described, for example, in DE-OS 30 31 680, can also be used.
• the afterburning of the coal gas produced can be carried out to such an extent that practically all of the coal gas produced is afterburned by the amount required to operate the reactor to be able to supply the necessary heat to the molten bath if the metal to be extracted is sufficiently valuable and can be produced economically in this way.
• melt pool reactors known from the publications mentioned are suitable for carrying out the gasification process according to the invention. If necessary, these must be equipped with devices for extracting the metal obtained.
• a gas containing carbon in particular coal or coke
• an iron carrier can be reductively worked up, but it is possible to extract valuable metals which can be obtained by using the reductive high-temperature atmosphere of the melt pool reactor many energy sources or waste products, which are currently regarded as inferior, are contained in a low concentration which, according to the current state of the art, is considered to be uneconomical.
• the main products now also include valuable metal concentrates. Since the process does not place any special demands on the gasification material, low-quality energy sources, including waste such as sewage sludge, can be economically converted into a high-quality raw gas.
• the base material for the melt pool reactor is in particular a base metal, such as iron.
• a base metal such as iron.
• the use of a lead or aluminum bath seems possible. The choice of the bath material will be made taking into account the metal normally to be extracted, which is different from the bath material, whereby the operating temperature must be taken into account.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Organic Chemistry (AREA)
• Combustion & Propulsion (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Manufacturing & Machinery (AREA)
• Materials Engineering (AREA)
• Metallurgy (AREA)
• Manufacture And Refinement Of Metals (AREA)

Applications Claiming Priority (2)

Publications (1)

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Cited By (11)

Families Citing this family (1)

Citations (9)

• 1982
  • 1982-02-02 DE DE19823203435 patent/DE3203435A1/de not_active Withdrawn
  • 1982-12-04 EP EP82111253A patent/EP0085153A1/fr not_active Withdrawn
• 1983
  • 1983-01-28 JP JP1160983A patent/JPS58133337A/ja active Pending

Patent Citations (9)

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