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

ChemSusChem ◽  
2014 ◽  
Vol 7 (3) ◽  
pp. 903-913 ◽  
Author(s):  
Hannu-Petteri Mattila ◽  
Ron Zevenhoven
Keyword(s):  
Calcium Carbonate ◽  
Converter Slag ◽  
Continuous Process ◽  
Precipitated Calcium Carbonate ◽  
Carbonate Production ◽  
Steel Converter

Steel Converter Slag as a Raw Material for Precipitation of Pure Calcium Carbonate

2008 ◽  
Vol 47 (18) ◽  
pp. 7104-7111 ◽  
Author(s):  
Sanni Eloneva ◽  
Sebastian Teir ◽  
Justin Salminen ◽  
Carl-Johan Fogelholm ◽  
Ron Zevenhoven
Keyword(s):  
Calcium Carbonate ◽  
Converter Slag ◽  
Raw Material ◽  
Steel Converter

Dissolution of steelmaking slags in acetic acid for precipitated calcium carbonate production

Energy ◽  
2007 ◽  
Vol 32 (4) ◽  
pp. 528-539 ◽  
Author(s):  
Sebastian Teir ◽  
Sanni Eloneva ◽  
Carl-Johan Fogelholm ◽  
Ron Zevenhoven
Keyword(s):  
Acetic Acid ◽  
Calcium Carbonate ◽  
Precipitated Calcium Carbonate ◽  
Carbonate Production ◽  
Steelmaking Slags

Study of Operational Conditions for the Precipitated Calcium Carbonate Production

2008 ◽  
Vol 591-593 ◽  
pp. 526-530 ◽  
Author(s):  
Eliane Cristina Silva Souto ◽  
João Jorge Ribeiro Damasceno ◽  
Carla Eponina Hori
Keyword(s):  
Particle Size ◽  
Calcium Carbonate ◽  
Process Conditions ◽  
Precipitated Calcium Carbonate ◽  
Carbonate Production ◽  
Operational Conditions ◽  
Slaked Lime

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.

scholarly journals Bubble column application on purification of biogas and production of nano-calcium carbonate in continuous process

2020 ◽  
Vol 16 (3) ◽  
pp. 286-291
Author(s):  
Yukh Ihsana ◽  
Putu Adhi Rama ◽  
Sugeng Winardi ◽  
Tantular Nurtono
Keyword(s):  
Calcium Carbonate ◽  
Flow Rate ◽  
Gas Flow ◽  
Bubble Column ◽  
Continuous Process ◽  
Calorific Value ◽  
Co2 Concentration ◽  
Absorption Process ◽  
Gas Flow Rate ◽  
Precipitated Calcium Carbonate

Purification of biogas by removing carbon dioxide content has been developed to increase its calorific value. The CO2  contained in biogas was absorbed by contacting Ca(OH)2 solution and CO2 in the bubble column to produce high purity of biogas and generated precipitated calcium carbonate (PCC) simultaneously. Two sources of CO2 were used in this work, which were CO2 contained in biogas and pure CO2. Pure CO2 was used as a benchmark in this study to show the effect of the presence of methane contained in biogas on the absorption process. The investigation was done in a continuous process. The results showed that the highest absorption of CO2 was obtained in biogas at 79.34 %. PCC with calcite phases was successfully formed in 225–270 nm. Rhombohedral calcite phase was formed by the use of pure CO2 and biogas as a source of CO2. The use of CO2 contained in biogas and pure CO2 in the absorption process did not have an effect on the crystalline phase and morphology of calcite formed. Several factors that significantly affected the absorption of CO2 were gas flow rate, absorbent flow rate, CO2 concentration in the gas inlet, and the initial liquid level in the bubble column. 

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

TAPPI Journal ◽  
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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