Chemical kinetics modeling and process parameter sensitivity for precipitated calcium carbonate production from steelmaking slags

Calcium carbonate (CaCO3) is a natural occurring mineral or it can be produced by chemical means. This last product is often referred to as Precipitated Calcium Carbonate (PCC). PCC has various advantanges since it exhibits higher brightness and opacity. There can be considerable variation in the properties of the PCC depending upon the process conditions used to prepare it. In this work, the effect of different factors on the particle size of PCC has been investigated. The experiments were performed by bubbling CO2 in slaked lime suspensions. The pH of the lime slurry was 12 or higher at the beginning, but it decreased, down to an equilibrium pH of 8± 1, when the reaction was considered complete.

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Design of a Continuous Process Setup for Precipitated Calcium Carbonate Production from Steel Converter Slag

ChemSusChem ◽

10.1002/cssc.201300516 ◽

2014 ◽

Vol 7 (3) ◽

pp. 903-913 ◽

Cited By ~ 15

Author(s):

Hannu-Petteri Mattila ◽

Ron Zevenhoven

Keyword(s):

Calcium Carbonate ◽

Converter Slag ◽

Continuous Process ◽

Precipitated Calcium Carbonate ◽

Carbonate Production ◽

Steel Converter

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Preliminary assessment of a method utilizing carbon dioxide and steelmaking slags to produce precipitated calcium carbonate

Applied Energy ◽

10.1016/j.apenergy.2011.05.045 ◽

2012 ◽

Vol 90 (1) ◽

pp. 329-334 ◽

Cited By ~ 91

Author(s):

Sanni Eloneva ◽

Arshe Said ◽

Carl-Johan Fogelholm ◽

Ron Zevenhoven

Keyword(s):

Carbon Dioxide ◽

Calcium Carbonate ◽

Preliminary Assessment ◽

Precipitated Calcium Carbonate ◽

Steelmaking Slags

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Cradle-to-gate life cycle assessment of precipitated calcium carbonate production from steel converter slag

Journal of Cleaner Production ◽

10.1016/j.jclepro.2014.05.064 ◽

2014 ◽

Vol 84 ◽

pp. 611-618 ◽

Cited By ~ 18

Author(s):

Hannu-Petteri Mattila ◽

Hannes Hudd ◽

Ron Zevenhoven

Keyword(s):

Life Cycle Assessment ◽

Life Cycle ◽

Calcium Carbonate ◽

Converter Slag ◽

Precipitated Calcium Carbonate ◽

Carbonate Production ◽

Cradle To Gate ◽

Steel Converter

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A method for measuring the in-plane compressive strength and the compression behavior of coating layers

TAPPI Journal ◽

10.32964/tj10.7.29 ◽

2011 ◽

Vol 10 (7) ◽

pp. 29-34

Author(s):

TEEMU PUHAKKA ◽

ISKO KAJANTO ◽

NINA PYKÄLÄINEN

Keyword(s):

Tensile Strength ◽

Compressive Strength ◽

Calcium Carbonate ◽

Coating Layer ◽

Test Methods ◽

Coating Films ◽

Precipitated Calcium Carbonate ◽

Coating Color ◽

Mineral Coatings ◽

Styrene Butadiene

Cracking at the fold is a quality defect sometimes observed in coated paper and board. Although tensile and compressive stresses occur during folding, test methods to measure the compressive strength of a coating have not been available. Our objective was to develop a method to measure the compressive strength of a coating layer and to investigate how different mineral coatings behave under compression. We used the short-span compressive strength test (SCT) to measure the in-plane compressive strength of a free coating layer. Unsupported free coating films were prepared for the measurements. Results indicate that the SCT method was suitable for measuring the in-plane compressive strength of a coating layer. Coating color formulations containing different kaolin and calcium carbonate minerals were used to study the effect of pigment particles’ shape on the compressive and tensile strengths of coatings. Latices having two different glass transition temperatures were used. Results showed that pigment particle shape influenced the strength of a coating layer. Platy clay gave better strength than spherical or needle-shaped carbonate pigments. Compressive and tensile strength decreased as a function of the amount of calcium carbonate in the coating color, particularly with precipitated calcium carbonate. We also assessed the influence of styrene-butadiene binder on the compressive strength of the coating layer, which increased with the binder level. The compressive strength of the coating layer was about three times the tensile strength.

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