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A Method Of Producing Yellow Calcium Sulphate From Ld Slag Waste Produced During The Recovery Of Metallic Iron From Ld Slag
Abstract: The invention relates to a method of producing Yellow Calcium Sulphate from LD Slag fines of -6mm after recovering the metallic iron, the method comprising the step of: reacting LD Slag fines, water, and a sulfuric acid solution at a range of temperature and for stipulated time and neutralise the slurry with lime fines to produce a Yellow calcium sulphate product by, wherein the sulfuric acid solution comprises Sulphuric acid (98%, SpGr 1.84), wherein the LD Slag fines of -60mesh (-0.25mm) is mixed with water prior to addition of sulphuric acid solution, the step of heating the mixture of LD Slag fines, water and Sulphuric acid is done at temperature of 100 – 110oC, wherein the LD Slag fines(gm), Sulphuric acid(ml) is mixed and water(ml) in the ratio of 1 : 1.4 : 8.6 respectively, and wherein the mixture is heated for a period of 1.5 – 2.5 Hrs to break the calcium compounds present in the LD Slag fines to insoluble Calcium sulphate and converting other metal oxides to soluble sulphates.
Notices, Deadlines & Correspondence
Patent Information
Applicants
TATA STEEL LIMITED
Inventors
1. SHRENIVAS SHETURAMACHARYA ASHRIT
2. PRADIP KUMAR BANERJEE
3. TAMAL KANTI GHOSH
4. K.N. UDPA
Specification
CLIAMS:Please find the attached file ,TagSPECI:Please find the attached file
Documents
Orders
| Section | Controller | Decision Date |
|---|---|---|
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | GPA.pdf | 2014-05-26 |
| 2 | FOA.pdf | 2014-05-26 |
| 3 | F3.pdf | 2014-05-26 |
| 4 | F2.pdf | 2014-05-26 |
| 5 | DW.pdf | 2014-05-26 |
| 6 | 572-KOL-2014-(08-07-2014)-FORM-1.pdf | 2014-07-08 |
| 7 | 572-KOL-2014-(08-07-2014)-CORRESPONDENCE.pdf | 2014-07-08 |
| 8 | 572-KOL-2014-(20-10-2014)-FORM-1.pdf | 2014-10-20 |
| 9 | 572-KOL-2014-(20-10-2014)-CORRESPONDENCE.pdf | 2014-10-20 |
| 10 | 572-KOL-2014-(16-04-2015)-CORRESPONDENCE.pdf | 2015-04-16 |
| 11 | 572-KOL-2014-FER.pdf | 2019-08-21 |
| 12 | 572-KOL-2014-FER_SER_REPLY [21-02-2020(online)].pdf | 2020-02-21 |
| 13 | 572-KOL-2014-DRAWING [21-02-2020(online)].pdf | 2020-02-21 |
| 14 | 572-KOL-2014-COMPLETE SPECIFICATION [21-02-2020(online)].pdf | 2020-02-21 |
| 15 | 572-KOL-2014-CLAIMS [21-02-2020(online)].pdf | 2020-02-21 |
| 16 | 572-KOL-2014-ABSTRACT [21-02-2020(online)].pdf | 2020-02-21 |
| 17 | 572-KOL-2014-US(14)-HearingNotice-(HearingDate-05-12-2022).pdf | 2022-11-21 |
| 18 | 572-KOL-2014-FORM-26 [02-12-2022(online)].pdf | 2022-12-02 |
| 19 | 572-KOL-2014-FORM-26 [02-12-2022(online)]-1.pdf | 2022-12-02 |
| 20 | 572-KOL-2014-Correspondence to notify the Controller [02-12-2022(online)].pdf | 2022-12-02 |
| 21 | 572-KOL-2014-US(14)-ExtendedHearingNotice-(HearingDate-05-12-2022).pdf | 2022-12-05 |
| 22 | 572-KOL-2014-PETITION UNDER RULE 138 [19-12-2022(online)].pdf | 2022-12-19 |
| 23 | 572-KOL-2014-POA [06-01-2023(online)].pdf | 2023-01-06 |
| 24 | 572-KOL-2014-MARKED COPIES OF AMENDEMENTS [06-01-2023(online)].pdf | 2023-01-06 |
| 25 | 572-KOL-2014-FORM 13 [06-01-2023(online)].pdf | 2023-01-06 |
| 26 | 572-KOL-2014-AMENDED DOCUMENTS [06-01-2023(online)].pdf | 2023-01-06 |
| 27 | 572-KOL-2014-Written submissions and relevant documents [19-01-2023(online)].pdf | 2023-01-19 |
| 28 | 572-KOL-2014-US(14)-ExtendedHearingNotice-(HearingDate-25-01-2023).pdf | 2023-01-20 |
| 29 | 572-KOL-2014-FORM-26 [24-01-2023(online)].pdf | 2023-01-24 |
| 30 | 572-KOL-2014-Correspondence to notify the Controller [24-01-2023(online)].pdf | 2023-01-24 |
| 31 | 572-KOL-2014-Written submissions and relevant documents [07-02-2023(online)].pdf | 2023-02-07 |
| 32 | 572-KOL-2014-PatentCertificate22-02-2023.pdf | 2023-02-22 |
| 33 | 572-KOL-2014-IntimationOfGrant22-02-2023.pdf | 2023-02-22 |
| 34 | 572-KOL-2014-FORM 4 [02-08-2024(online)].pdf | 2024-08-02 |
Search Strategy
| 1 | SearchStrategy572KOL2014_20-08-2019.pdf |