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US4334920A
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Integrated process for thermal cracking of heavy oil and reduction of iron ores
Assignee: Koa Oil Co Ltd
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Filing: 1980-04-08
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Granted: 1982-06-15
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Expires: 2000-04-08
Abstract
Abstract Vacuum distillation residue oil having a Conradson carbon value of 5 to 40% and a specific gravity of 0.9 to 1.10 is thermally cracked in the presence of iron ore particles in fluidized state in a thermal cracking reactor thereby to produce light oils and cracked gases and to form by-product carbon, which is caused to deposit on the iron ore particles, which are then transferred to and heated at 800° C. to 1200° C. in a reducing furnace to be reduced in a solid state reaction, into sponge iron. Thus, heavy oil is thermally cracked and sponge iron is produced by an economical, integrated process.
Inventors
- 👤 Kenji Mori
- 👤 Eiji Miura
- 👤 Reijiro Nishida
- 👤 Kiyohiko Koizumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:16
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/28; C10G9/32; C21; C21B; C21B13/00; C21B13/14; C21B13/146; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134; Y02P10/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
170 words
An integrated process for thermal cracking of hydrocarbon oil and production of iron which consists essentially of: (a) thermally cracking the hydrocarbon oil in the presence of iron ore particles of a particle size suitable for fluidization in a fluidized state in a thermal cracking reactor at a temperature of from 400° C. to 630° C. thereby to produce and recover light oils and cracked gases; at the same time causing by-product carbon thus formed to deposit on the iron ore particles; said hydrocarbon oil being a vacuum distillation residue oil having a Conradson carbon value of 5 to 40 percent and a specific gravity of 0.9 to 1.10 and, (b) introducing said carbon-deposited iron ore with or without additional carbon, into a reducing furnace and heating the thus introduced mixture of the carbon deposited iron ore with or without the additional carbon at a temperature of from 800° C. to 1,200° C. in the reducing furnace, while maintaining said mixture in the solid state, to thereby produce sponge iron.
Claim 2
Dependent Claim
170 words
An integrated process for thermal cracking of hydrocarbon oil and production of iron which consists essentially of: (a) thermally cracking the hydrocarbon oil in the presence of iron ore particles of a particle size suitable for fluidization in a fluidized state in a thermal cracking reactor at a temperature of from 400° C. to 630° C. thereby to produce and recover light oils and cracked gases; at the same time causing by-product carbon thus formed to deposit on the iron ore particles; said hydrocarbon oil being a vacuum distillation residue oil having a Conradson carbon value of 5 to 40 percent and a specific gravity of 0.9 to 1.10 and, (b) introducing said carbon-deposited iron ore with or without additional carbon, into a reducing furnace and heating the thus introduced mixture of the carbon deposited iron ore with or without the additional carbon at a temperature of from 800° C. to 1,200° C. in the reducing furnace, while maintaining said mixture in the solid state, to thereby produce sponge iron.
Claim 3
Dependent Claim
28 words
The integrated process according to claim 1 wherein the amount of carbon deposited in step (a) is between about from 10% to 15% of the carbon deposited ore.
Claim 4
Dependent Claim
15 words
The integrated process according to claim 1 wherein additional carbon is added in step (b).
Claim 5
Dependent Claim
32 words
The integrated process according to claim 1 in which the iron ore is an ore selected from the group consisting of hematite, magnetite, limonite, siderite, and mixtures of at least two thereof.
Claim 6
Dependent Claim
40 words
The integrated process according to claim 1 in which the thermal cracking reactor has the shape of an elongated vertical cylinder provided at its upper part with a cyclone and a scrubber, and the reducing furnace is a rotary kiln.
Claim 7
Dependent Claim
31 words
The integrated process according to of claim 1 in which the iron ore particles with the carbon deposited thereon are enlarged in size prior to being introduced into the reducing furnace.
Claim 8
Dependent Claim
25 words
The integrated process according to of claim 1 in which the steam is injected into the cracking reactor thereby to fluidize the iron ore particles.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |