Classifications

• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
  • C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
  • C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition

Definitions

• the invention relates to the coke industry and in particular to the composition of a charge for producing metallurgical coke.
• the disadvantage of this invention is the lack of technologies for supplying components in a liquid-flow state to the coal charge and, as a result, the impossibility of applying the invention in an industrial scale.
• the disadvantage of the additive according to these patents is the instability of its caking properties, the insufficient coking level of the additive and, accordingly, the unstable quality of the resulting metallurgical coke, as well as the lack of a description of clear boundaries for the use of this product in the composition of the charge for coke production, which causes difficulties in assessing the effect of the presence of this product on the quality of metallurgical coke.
• the used petroleum residues are characterized by ash content A d of up to 2.5%, volatiles content V daf of up to90%, sulfur content S d of up to5%, and Roga index (RI) of less than 10.
• the petroleum coke is characterized by ash content A d of up to2.5%, volatiles content V daf of up to25%, and sulfur content S d up to5% ( RU No. 2627425, 08.08.2017 ).
• a significant disadvantage of using the invention is the need to reconstruct the process equipment in the coal preparation or coke departments.
• Patent document RU 2 174 528 C1, 10.10.2001 discloses a method for producing coke from a charge containing a mixture of:
• the disadvantage of the described method is high consumption of valuable caking and coking coals and low consumption of coals of inert groups with achievement of not sufficiently favorable parameters: quite low CSR (coke strength after reaction with CO 2 (%)) and high CRI (coke reactivity index (%)).
• the closest composition of the charge for coking is the composition of the charge proposed in the method for producing metallurgical coke ( RU No. 2553116, 2015 ), which is used as a carbonaceous charge with a content of from 50 to 100 wt.% of petroleum semi-coke with a volatiles content of from 14 to 25 wt.% produced by delayed partial carbonization of heavy petroleum residues.
• the problem to be solved by the invention is to develop a special coking charge composition, which makes it possible to expand the range and reduce the cost of the raw materials of the used charge with an improvement in the quality of metallurgical coke having higher strength characteristics (coke strength after reaction with CO 2 (CSR) in the range of from 60 to 66% and coke reactivity index (CRI) in the range of form 23 to 28%).
• CSR coke strength after reaction with CO 2
• CRI coke reactivity index
• the charge composition uses petroleum coke produced by delayed coking of heavy petroleum residues: tar, deasphalting asphalt, vacuum visbreaking residue, etc.
• Table 1 represents the qualitative characteristics of petroleum coke.
• Table 1 Parameter Unit Value 1 Ash content A d % 0.4 2 Volatiles content V d % 15-18 3 Total sulfur content S d % 4.0-4.8 4 Coke strength after reaction CSR % 55-70 6 Coke reactivity index CRI % 23-28 7 Caking index G, GOST ISO 15585-2013 - 75-100
• the used charge according to examples 2 and 3 had a ratio of caking and inert coal groups of 1:1.15.
• Table 2 represents the qualitative characteristics of metallurgical coke depending on the charge composition and the amount of petroleum coke used.
• Table 2 Charge version Charge composition, % Physical and chemical properties of metallurgical coke, % G + GF + GFL + F CC/LC Petroleum coke W r A d S d CSR CRI Basic 46.5 53.5 0 0.2 11.1 0.52 57.2 30.0 Experimental 1 43.5 50.0 6.5 0.2 10.4 0.75 60.4 28.0 Experimental 2 38.6 44.4 17.0 0.2 9.3 1.15 63.8 24.3 Experimental 3 27.9 32.1 40.0 0.2 6.9 1.85 65.8 23.1 where W r is total moisture content (%); A d is ash content (%); S d is total sulfur content (%); CSR is coke strength after reaction with CO 2 (%); and CRI is coke reactivity index (%).
• charges comprising blends of caking and inert coal groups of various ranks in the ratio of 1: 1.15 in the amount of from 60 to 93.5 wt.% and petroleum coke in the amount of from 6.5 to 40 wt.% can be used to produce metallurgical coke with improved strength characteristics: coke strength after reaction with CO 2 (CSR) in the range of from 60 to 66% (57% in the basic version) and coke reactivity (CRI) in the range of from 23 to 28% (30% in the basic version).
• CSR coke strength after reaction with CO 2
• CRI coke reactivity

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Organic Chemistry (AREA)
• Coke Industry (AREA)

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• 2020
  • 2020-11-19 RU RU2020138082A patent/RU2769188C1/ru active
• 2021
  • 2021-05-28 WO PCT/RU2021/050148 patent/WO2022108484A1/ru not_active Ceased
  • 2021-05-28 EP EP21895219.0A patent/EP4249571B1/en active Active
  • 2021-05-28 ES ES21895219T patent/ES3060437T3/es active Active
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