Canadian Patents Database / Patent 2852813 Summary

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(12) Patent: (11) CA 2852813
(54) English Title: COMPOSITE BRIQUETTE FOR STEELMAKING OR IRONMAKING FURNACE CHARGE
(54) French Title: BRIQUETTE DE COMPOSITE POUR FOUR DE SIDERURGIE OU DE FORGE
(51) International Patent Classification (IPC):
  • C21B 3/02 (2006.01)
  • C21B 5/04 (2006.01)
(72) Inventors (Country):
  • VAYDA, PIERRE (Canada)
(73) Owners (Country):
  • EXOTHERMIC DISTRIBUTION CORPORATION (Canada)
(71) Applicants (Country):
  • EXOTHERMIC DISTRIBUTION CORPORATION (Canada)
(74) Agent: SIM & MCBURNEY
(45) Issued: 2017-10-03
(22) Filed Date: 2014-05-29
(41) Open to Public Inspection: 2014-08-11
Examination requested: 2014-05-29
(30) Availability of licence: N/A
(30) Language of filing: English

English Abstract

A briquette for addition to the charge in a steelmaking or ironmaking furnace comprises a quantity of carbon fines, a material in powdered form, the material selected from the group consisting of iron powder and iron oxide, the material densifying the briquette and suppressing the slippery nature of the carbon fines, a quantity of magnesium carbonate, and a binder.


French Abstract

Une briquette pour ajout à la charge dans un four de sidérurgie ou de forge comprend une quantité de fines de carbone, une matière sous forme de poudre, la matière étant choisie à partir du groupe constitué par de la poudre de fer et de loxyde de fer, la matière densifiant la briquette et éliminant le caractère glissant des fines de carbone, une quantité de carbonate de magnésium et un liant.


Note: Claims are shown in the official language in which they were submitted.

- 12 -
What is claimed is:
1. A composite briquette for addition to a charge in a steelmaking
furnace, the briquette comprising:
a quantity of carbon fines;
a quantity of iron powder, the iron powder densifying the briquette and
suppressing the slippery nature of the carbon fines;
a quantity of magnesium carbonate;
a quantity of limestone; and
a binder,
wherein 50 % of the total briquette weight is the carbon fines, 25 % of
the total briquette weight is the iron powder, and the remainder of the total
briquette
weight, apart from the binder, is magnesium carbonate and limestone,
and wherein the binder comprises molasses and lime.
2. The briquette of claim 1, wherein the briquette comprises from 1 to 10
% by weight of the binder.
3. Use of the briquette of claim 1 or 2 as addition to the charge in the
steelmaking furnace, the furnace being an electric arc furnace or a basic
oxygen
furnace.
4. A method of improving a slag-covered charge in a steelmaking
furnace, the slag-covered charge comprising a charge covered with slag, the
method
comprising:
making a mixture of: a quantity of carbon fines, a quantity of iron
powder, a quantity of magnesium carbonate, a quantity of limestone, and a
binder,
wherein the binder comprises molasses and lime;
compressing a portion of said mixture in a suitable mold to make a
briquette, said iron powder densifying the briquette and suppressing the
slippery
nature of the carbon fines, wherein 50 % of the total briquette weight is the
carbon
fines, 25 % of the total briquette weight is the iron powder, and the
remainder of the

- 13 -
total briquette weight, apart from the binder, is magnesium carbonate and
limestone;
and
introducing said briquette to the charge below the slag in the
steelmaking furnace so that said iron powder contained in the briquette causes
the
briquette to sink into the charge.
5. The method of claim 4, wherein the mixture comprises from 1 to 10 %
by weight of the binder.
6. The method of claim 5 or 6, whereby upon introducing the briquette to
the charge, CO2 is generated such that the CO2 foams the slag from underneath.
7. The method of any one of claims 4 to 6, wherein the furnace is an
electric arc furnace or a basic oxygen furnace.


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Admin Status

Title Date
(22) Filed 2014-05-29
Examination Requested 2014-05-29
(41) Open to Public Inspection 2014-08-11
(45) Issued 2017-10-03

Maintenance Fee

Description Date Amount
Last Payment 2017-05-25 $50.00
Next Payment if small entity fee 2018-05-29 $50.00
Next Payment if standard fee 2018-05-29 $100.00

Note : If the full payment has not been received on or before the date indicated, a further fee may be required which may be one of the following

  • the reinstatement fee set out in Item 7 of Schedule II of the Patent Rules;
  • the late payment fee set out in Item 22.1 of Schedule II of the Patent Rules; or
  • the additional fee for late payment set out in Items 31 and 32 of Schedule II of the Patent Rules.

Payment History

Fee Type Anniversary Year Due Date Amount Paid Paid Date
Request for Examination $400.00 2014-05-29
Filing $200.00 2014-05-29
Maintenance Fee - Application - New Act 2 2016-05-30 $50.00 2016-05-02
Maintenance Fee - Application - New Act 3 2017-05-29 $50.00 2017-05-25
Final $150.00 2017-08-17

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Document
Description
Date
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Number of pages Size of Image (KB)
Cover Page 2014-09-22 1 24
Abstract 2014-05-29 1 10
Description 2014-05-29 11 452
Claims 2014-05-29 5 142
Claims 2014-12-11 5 137
Description 2014-12-11 11 458
Description 2015-06-09 11 434
Claims 2015-06-09 4 104
Description 2015-08-07 11 425
Claims 2015-08-07 3 88
Claims 2016-07-06 2 54
Claims 2016-11-02 2 49
Description 2016-11-02 11 384
Prosecution-Amendment 2016-11-28 3 222
Prosecution-Amendment 2014-08-19 1 28
Prosecution-Amendment 2014-09-11 2 94
Prosecution-Amendment 2014-12-11 12 403
Prosecution-Amendment 2015-03-19 3 237
Prosecution-Amendment 2015-06-09 9 293
Prosecution-Amendment 2015-07-03 4 261
Prosecution-Amendment 2015-08-07 9 292
Prosecution-Amendment 2016-04-06 4 306
Prosecution-Amendment 2016-07-06 5 145
Prosecution-Amendment 2016-08-02 5 290
Prosecution-Amendment 2016-11-02 9 251
Prosecution-Amendment 2017-01-11 4 160
Prosecution-Amendment 2017-03-13 4 241
Prosecution-Amendment 2017-06-13 4 107
Claims 2017-06-13 2 47
Correspondence 2017-08-17 2 71
Cover Page 2017-09-01 1 24