Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
  • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
  • B02C23/24—Passing gas through crushing or disintegrating zone
  • B02C23/34—Passing gas through crushing or disintegrating zone gas being recirculated to crushing or disintegrating zone
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
  • B01J8/005—Separating solid material from the gas/liquid stream
  • B01J8/0055—Separating solid material from the gas/liquid stream using cyclones
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
  • B01J8/005—Separating solid material from the gas/liquid stream
  • B01J8/006—Separating solid material from the gas/liquid stream by filtration
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
  • C01B33/00—Silicon; Compounds thereof
  • C01B33/02—Silicon
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E50/00—Technologies for the production of fuel of non-fossil origin
  • Y02E50/10—Biofuels, e.g. bio-diesel

Definitions

• the invention relates to the technical sector of the exploitation and regeneration of carbon-based materials included in products of any kind.
• Natural graphite carbon is generally present in deposits in the form of flecks, flakes or veins, used mainly for its refractory qualities, lubricating properties and its high chemical resistance, artificial carbons such as artificial graphite, animal black, charcoal wood, pyrocarbon, activated carbon, coke, carbon black.
• Carbonaceous products composed of carbon and other minerals, come for example from the implementation of the process known under the trademark "CHARTHERM” (semi-figurative) and whose technology is defined in particular in the European Patent No. 772,663 .
• the carbon products thus obtained composed of carbon and other minerals, such as for example heavy metals, are themselves reusable for certain applications.
• the method consists in the execution of the following phases:
• the process implementation installation includes:
• FIG. 1 is a schematic view of the installation according to the invention.
• FIG. 2 is a schematic view of the pneumatic centrifuge.
• the treated solid carbon products are based on carbon and various minerals, some of which are metallic. They are for example from the implementation of the "CHARTHERM" process as described in the aforementioned European Patent EP 772,663 or French Patent Application No. 05 51335.
• the invention relates to the treatment of these carbonaceous products, resulting from this process in its different versions, or from any other technology, for the purpose of distinguishing and manufacturing, after extraction of mineral particles other than carbon, carbon powder from the almost pure state for use in different applications.
• the installation comprises means in the form of a hopper (1) capable of collecting the solid carbonaceous products conveyed to it by carriers and presenting them to a first zone (Z1) intervention and materialized treatment by the use of a pressure mill (2), for example pendulum mill.
• This crusher makes it possible to reduce the particle size of the carbon product and to break the structure of the carbon matrix while trying to preserve the size of the minerals other than the carbon present in the carbon product, these minerals being released from the carbon matrix which makes them coated, and obtain at the output of the mill a particle size distribution poorly dispersed around the average size of the particles.
• This mill (2) is equipped with the following components: a hopper (1) for supplying the carbonaceous products, a honeycomb valve (3) acting on the input flow rate of the carbonaceous products in the mill.
• said mill is arranged in its lower part with a pneumatic system (4) for recovering the products resulting from the grinding to transport them to the pneumatic separator (7) whose function is to reduce the width of the size distribution of the particles coming out of the grinder and return to the mill the particles considered too large.
• the neutral transport gas is introduced into the lower part of the mill (4) by means of a blower (5) introduced into a closed air circuit from a means (6) serving as a reservoir-lung .
• the pneumatic separator (7) has an outlet pipe (8), allowing the circulation of the gas transporting the various carbon particles and other minerals.
• the transport of these carbon particles and other minerals is carried out by the appropriate pipe (8) being transported by the gases according to the pre-established distribution circuit to a second so-called centrifugation zone (Z2). This is arranged to allow separation between the carbon particles and the other mineral particles including heavy metals.
• the pneumatic centrifuge (9), shown in FIG. 2, thus comprises an inlet (9a) for admitting solid particles from the mill and transported by the gases, an outlet (9b) for the carbon particles and internally a baffle drum ( 9c) whose rotation causes the formation of a rotating air cushion on itself.
• the lower part of the centrifuge is arranged with a recuperator (10) to collect inorganic particles other than carbon.
• a depression is created in the center of the centrifuge by means downstream, namely a main fan (23), through a filter box (18) and a cyclone (14).
• This depression attracts the particles orthogonally from the periphery to the center.
• the most particles heavy that is to say the particles consisting of minerals other than carbon, through the air cushion formed by the rotation of the baffle drum undergo centrifugal acceleration, directly proportional to their mass, which deviates from their initial trajectory and projects at the periphery of the air cushion, towards the walls of the centrifuge. In contact with the wall, these particles lose their speed and fall, by gravitation, down the centrifuge.
• the depression created by the main fan (23) causes the carbon particles that are transported by the gaseous fluid, through the cyclone where a first separation takes place. between the carbon particles and the gaseous fluid.
• the experiment showed that at the exit of the cyclonic equipment, the transport gas could still convey very fine particles of carbon.
• downstream of the cyclone equipment is provided complementary equipment consisting of a filter box (18), connected by the pipe (15).
• the depression created by the main fan (23) causes the flow of gas through the filter box where takes place the second separation between the carbon particles and the transport fluid.
• the transport gas is evacuated by the main fan (23) to the lung while the carbon accumulated on the filter walls falls into the bottom of the filter box under the influence of the cyclic countercurrent declogging.
• the mass of carbon powder accumulated at the bottom of the filter box passes through a honeycomb (19) and falls into the aforementioned linear conveyor (17).
• the reservoir-lung (6) which is therefore located between the blower (5) and the suction blower (23) is shaped as a reservoir. He enters this reservoir-lung as much gaseous fluid as it leaves. This fluid incorporates nitrogen (6a) to start the operation of the installation and to maintain a gaseous atmosphere neutral controlled overpressure.
• the nitrogen is fed into the lung reservoir from a nitrogen generator not shown in the drawing.
• the fluid distribution circuit is thus perfectly defined and allows fluid circulation in the different successive zones (Z1, Z2, Z3) in addition to the complementary bypass (11) of the reservoir-lung to the centrifuge facilitating the introduction of the particles. in the centrifuge.
• the installation runs continuously.
• the filtration apparatus downstream of the cyclonic equipment can be arranged with several filtration stages to refine at most the capture of the carbon particles, so that the transport gas once recycled may be free or virtually free of any particles.
• the process according to the invention thus makes it possible in a new way from the recovery of mineralized organic products by processes, such as for example the "CHARTHERM” process in its various variants, to produce carbon powder with a very high degree of purity. Student.
• Carbon recovery according to the process thus becomes a new source of carbonaceous product treatment and carbon powder production which is in areas of very competitive cost compared to carbon technologies of the prior art.
• Bag packaging of carbon powder is a possible mode for its distribution.
• various known means can be used for conditioning, weight control, extraction of air during filling of the bag, control of fluidity of the carbon powder with use of anti-arch systems.
• the invention provides a very important progress and allows the recycling and development of this noble material for other applications.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Food Science & Technology (AREA)
• Inorganic Chemistry (AREA)
• Carbon And Carbon Compounds (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Cites Families (6)

• 2005
  • 2005-07-07 FR FR0552079A patent/FR2888230B1/fr not_active Expired - Fee Related
• 2006
  • 2006-06-28 WO PCT/FR2006/050643 patent/WO2007006990A2/fr not_active Application Discontinuation
  • 2006-06-28 EP EP06778987A patent/EP1899422A2/de not_active Withdrawn
  • 2006-06-28 AU AU2006259214A patent/AU2006259214B2/en not_active Ceased

Non-Patent Citations (1)

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