Experimental Investigations of the Effect of Chemical Additives on the Rheological Properties of Highly Concentrated Iron Ore Slurries
Chemical additives are widely used in iron ore industry in various processing steps such as classification, crushing, grinding, and pelletization. These additives are also used in transportation of iron ore through highly concentrated slurry pipelines which are currently operating and coming up in l...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Hosokawa Powder Technology Foundation
2017-02-01
|
| Series: | KONA Powder and Particle Journal |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/kona/35/0/35_2018001/_html/-char/en |
| _version_ | 1818384015027077120 |
|---|---|
| author | Assefa Kebede Melorie Deo Raj Kaushal |
| author_facet | Assefa Kebede Melorie Deo Raj Kaushal |
| author_sort | Assefa Kebede Melorie |
| collection | DOAJ |
| description | Chemical additives are widely used in iron ore industry in various processing steps such as classification, crushing, grinding, and pelletization. These additives are also used in transportation of iron ore through highly concentrated slurry pipelines which are currently operating and coming up in large number across the world. These additives are usually categorized by their functions rather than chemical composition. In this study, the effect of quick lime (QL), hydrated lime (HL), Sodium hexametaphosphate (SHMP) and Acti-Gel on the rheological behaviors of iron ore slurries at volumetric concentrations (Cv) of 18.8 %, 22.1 % and 25.8 % and dosages of additives ranging from 0.05–2 % were investigated. The rheological parameters were measured using computerized rotational rheometer. All the sample data were best represented by Herschel-Bulkley model. Minimum shear stress and viscosity were obtained at 2 % dosage of QL for 18.8 % and minimum flow behaviour index was obtained at 25.8 % with 2 % additive dosage. The addition of HL markedly increases all the rheological parameters. When SHMP is used, minimum shear stress and viscosity were obtained at dosage of 1.5 %, 2 % and 2 % for Cv of 18.8 %, 22.1 % and 25.8 % respectively. Acti-Gel resulted higher values of yield stress and flow behaviour indices at all solid concentrations. |
| first_indexed | 2024-12-14T03:15:32Z |
| format | Article |
| id | doaj.art-db2082c0cff74ba0945834205edb74c5 |
| institution | Directory Open Access Journal |
| issn | 0288-4534 2187-5537 |
| language | English |
| last_indexed | 2024-12-14T03:15:32Z |
| publishDate | 2017-02-01 |
| publisher | Hosokawa Powder Technology Foundation |
| record_format | Article |
| series | KONA Powder and Particle Journal |
| spelling | doaj.art-db2082c0cff74ba0945834205edb74c52022-12-21T23:19:09ZengHosokawa Powder Technology FoundationKONA Powder and Particle Journal0288-45342187-55372017-02-0135018619910.14356/kona.2018001konaExperimental Investigations of the Effect of Chemical Additives on the Rheological Properties of Highly Concentrated Iron Ore SlurriesAssefa Kebede MelorieDeo Raj KaushalChemical additives are widely used in iron ore industry in various processing steps such as classification, crushing, grinding, and pelletization. These additives are also used in transportation of iron ore through highly concentrated slurry pipelines which are currently operating and coming up in large number across the world. These additives are usually categorized by their functions rather than chemical composition. In this study, the effect of quick lime (QL), hydrated lime (HL), Sodium hexametaphosphate (SHMP) and Acti-Gel on the rheological behaviors of iron ore slurries at volumetric concentrations (Cv) of 18.8 %, 22.1 % and 25.8 % and dosages of additives ranging from 0.05–2 % were investigated. The rheological parameters were measured using computerized rotational rheometer. All the sample data were best represented by Herschel-Bulkley model. Minimum shear stress and viscosity were obtained at 2 % dosage of QL for 18.8 % and minimum flow behaviour index was obtained at 25.8 % with 2 % additive dosage. The addition of HL markedly increases all the rheological parameters. When SHMP is used, minimum shear stress and viscosity were obtained at dosage of 1.5 %, 2 % and 2 % for Cv of 18.8 %, 22.1 % and 25.8 % respectively. Acti-Gel resulted higher values of yield stress and flow behaviour indices at all solid concentrations.https://www.jstage.jst.go.jp/article/kona/35/0/35_2018001/_html/-char/eniron ore slurryhighly concentrated slurrychemical additiverheological propertyherschel-bulkley fluid |
| spellingShingle | Assefa Kebede Melorie Deo Raj Kaushal Experimental Investigations of the Effect of Chemical Additives on the Rheological Properties of Highly Concentrated Iron Ore Slurries KONA Powder and Particle Journal iron ore slurry highly concentrated slurry chemical additive rheological property herschel-bulkley fluid |
| title | Experimental Investigations of the Effect of Chemical Additives on the Rheological Properties of Highly Concentrated Iron Ore Slurries |
| title_full | Experimental Investigations of the Effect of Chemical Additives on the Rheological Properties of Highly Concentrated Iron Ore Slurries |
| title_fullStr | Experimental Investigations of the Effect of Chemical Additives on the Rheological Properties of Highly Concentrated Iron Ore Slurries |
| title_full_unstemmed | Experimental Investigations of the Effect of Chemical Additives on the Rheological Properties of Highly Concentrated Iron Ore Slurries |
| title_short | Experimental Investigations of the Effect of Chemical Additives on the Rheological Properties of Highly Concentrated Iron Ore Slurries |
| title_sort | experimental investigations of the effect of chemical additives on the rheological properties of highly concentrated iron ore slurries |
| topic | iron ore slurry highly concentrated slurry chemical additive rheological property herschel-bulkley fluid |
| url | https://www.jstage.jst.go.jp/article/kona/35/0/35_2018001/_html/-char/en |
| work_keys_str_mv | AT assefakebedemelorie experimentalinvestigationsoftheeffectofchemicaladditivesontherheologicalpropertiesofhighlyconcentratedironoreslurries AT deorajkaushal experimentalinvestigationsoftheeffectofchemicaladditivesontherheologicalpropertiesofhighlyconcentratedironoreslurries |