Beneficiation of Low Grade Calcium Bentonite Claystone
The beneficiation of Ca-bentonite claystone has been studied with dispersion sedimentation technique using polyionic salts as dispersant.The claystone is located in the Western Desert of Iraq. It is of a low grade, associated with different amount of clay and non-clay mineral impurities. Calcite (Ca...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Unviversity of Technology- Iraq
2018-05-01
|
| Series: | Engineering and Technology Journal |
| Subjects: | |
| Online Access: | https://etj.uotechnology.edu.iq/article_175140_70486e89c4969a19ffe254d7208aae95.pdf |
| _version_ | 1797326007699505152 |
|---|---|
| author | Hijran Toama Abdul-Wahab Al-Ajeel Ekhlas Abdullah |
| author_facet | Hijran Toama Abdul-Wahab Al-Ajeel Ekhlas Abdullah |
| author_sort | Hijran Toama |
| collection | DOAJ |
| description | The beneficiation of Ca-bentonite claystone has been studied with dispersion sedimentation technique using polyionic salts as dispersant.The claystone is located in the Western Desert of Iraq. It is of a low grade, associated with different amount of clay and non-clay mineral impurities. Calcite (CaCO3) constitutes the major proportion of these impurities. Various parameters; solid concentration, dispersant amount (e.g. sodium tripolyphosphate, and tetrasodium pyrophosphate), conditioning time, and centrifugal sedimentation speed and time on the efficiency of the beneficiation process were investigated and followed through the measurement of CaO% and cation exchange capacity (CEC) values of the upgraded claystone concentrate. Centrifugal sedimentation were tested to separate the impurities from the clay suspension. Design experiments by Taguchi method, orthogonal array L16, was used for optimizing the different process parameters of the beneficiation process. Experiments were conducted at different solid concentrations (1, 3, 5, 7) wt.%, dispersion agent amount (0.2, 0.4, 0.6, 0.8) wt.%, conditioning time (5, 10, 15, 20) min, centrifugal sedimentation speed (500, 600, 700, 800) rpm, and centrifugal time (5, 10, 15, 20) min. The optimum beneficiation conditions obtained from the experimental work are, 7 wt.% solid concentration, 0.8 wt.% of dispersant, 15 min conditioning time attachment of the dispersant agent with the bentonite slurry, 800 rpm centrifugal speed, for 10 min time. Under studied condition, tetrasodium pyrophosphate showed better output t for achieving good beneficiation of bentonite clay from dilute crude slurry. |
| first_indexed | 2024-03-08T06:17:25Z |
| format | Article |
| id | doaj.art-6046e3d2b2fb4724beb2646e0d4da231 |
| institution | Directory Open Access Journal |
| issn | 1681-6900 2412-0758 |
| language | English |
| last_indexed | 2024-03-08T06:17:25Z |
| publishDate | 2018-05-01 |
| publisher | Unviversity of Technology- Iraq |
| record_format | Article |
| series | Engineering and Technology Journal |
| spelling | doaj.art-6046e3d2b2fb4724beb2646e0d4da2312024-02-04T17:16:03ZengUnviversity of Technology- IraqEngineering and Technology Journal1681-69002412-07582018-05-01365A54655410.30684/etj.36.5A.10175140Beneficiation of Low Grade Calcium Bentonite ClaystoneHijran Toama0Abdul-Wahab Al-Ajeel1Ekhlas Abdullah2Production Engineering & Metallurgy Dept., University of Technology, Baghdad, IraqIraqi Geological Survey Baghdad, IraqDepartment of Production Engineering & Metallurgy, University of Technology, Baghdad, IraqThe beneficiation of Ca-bentonite claystone has been studied with dispersion sedimentation technique using polyionic salts as dispersant.The claystone is located in the Western Desert of Iraq. It is of a low grade, associated with different amount of clay and non-clay mineral impurities. Calcite (CaCO3) constitutes the major proportion of these impurities. Various parameters; solid concentration, dispersant amount (e.g. sodium tripolyphosphate, and tetrasodium pyrophosphate), conditioning time, and centrifugal sedimentation speed and time on the efficiency of the beneficiation process were investigated and followed through the measurement of CaO% and cation exchange capacity (CEC) values of the upgraded claystone concentrate. Centrifugal sedimentation were tested to separate the impurities from the clay suspension. Design experiments by Taguchi method, orthogonal array L16, was used for optimizing the different process parameters of the beneficiation process. Experiments were conducted at different solid concentrations (1, 3, 5, 7) wt.%, dispersion agent amount (0.2, 0.4, 0.6, 0.8) wt.%, conditioning time (5, 10, 15, 20) min, centrifugal sedimentation speed (500, 600, 700, 800) rpm, and centrifugal time (5, 10, 15, 20) min. The optimum beneficiation conditions obtained from the experimental work are, 7 wt.% solid concentration, 0.8 wt.% of dispersant, 15 min conditioning time attachment of the dispersant agent with the bentonite slurry, 800 rpm centrifugal speed, for 10 min time. Under studied condition, tetrasodium pyrophosphate showed better output t for achieving good beneficiation of bentonite clay from dilute crude slurry.https://etj.uotechnology.edu.iq/article_175140_70486e89c4969a19ffe254d7208aae95.pdfbeneficiationcation exchange capacity (cec)centrifugal sedimentationdispersionmontmorillonite |
| spellingShingle | Hijran Toama Abdul-Wahab Al-Ajeel Ekhlas Abdullah Beneficiation of Low Grade Calcium Bentonite Claystone Engineering and Technology Journal beneficiation cation exchange capacity (cec) centrifugal sedimentation dispersion montmorillonite |
| title | Beneficiation of Low Grade Calcium Bentonite Claystone |
| title_full | Beneficiation of Low Grade Calcium Bentonite Claystone |
| title_fullStr | Beneficiation of Low Grade Calcium Bentonite Claystone |
| title_full_unstemmed | Beneficiation of Low Grade Calcium Bentonite Claystone |
| title_short | Beneficiation of Low Grade Calcium Bentonite Claystone |
| title_sort | beneficiation of low grade calcium bentonite claystone |
| topic | beneficiation cation exchange capacity (cec) centrifugal sedimentation dispersion montmorillonite |
| url | https://etj.uotechnology.edu.iq/article_175140_70486e89c4969a19ffe254d7208aae95.pdf |
| work_keys_str_mv | AT hijrantoama beneficiationoflowgradecalciumbentoniteclaystone AT abdulwahabalajeel beneficiationoflowgradecalciumbentoniteclaystone AT ekhlasabdullah beneficiationoflowgradecalciumbentoniteclaystone |