Tag Archives: granulation

Application aqueous polymer dispersions for encapsulation of granular fertilizers

Application aqueous polymer dispersions for encapsulation of granular fertilizers

Krzysztof Żywociński, Grażyna Gozdecka, Wojciech Korpal ? Faculty of Chemical Technology and Engineering, University of Technology and Life Science, Bydgoszcz Please cited as: CHEMIK 2011, 65, 4, 347-352 In this work granular, compound fertilizer for trees and shrubs during the prolonged operation using the three selected aqueous polymer dispersion coatings. The dissolution rate of fertilizer thus obtained was determined by conductometric measuring the electrical conductivity of the resulting solution. Calculated polymer content in the pellet and the thickness of the shell. Keywords: polymer-coated fertilizers, aqueous polymer dispersions, granulation Read more: pdf-icon...
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Granulation of sodium silicates by pressing method

Granulation of sodium silicates by pressing method KUŻDŻAŁ E., WALAWSKA B., KWIECIEŃ J. Please cite as: CHEMIK 2012, 66, 5, 515-524 The preliminary results of studies of sodium silicate granulation by pressing method was described. The studies was conducted to test the possibility of obtaining the powdery raw material granules with a specific particle size distribution. In laboratory studies powdered sodium silicates with module of 2 up to 3.3 SiO2 moles/Na2O moles were used. They were investigated in the AWPMA?s matrix press. The studies determined the impact of compaction pressure on the densification degree and the optimal compression pressure of tested silicates was determined. The products of larger grains and higher bulk densities were obtained. The results allow the selection of industrial equipment for granulation of sodium disilicates as the main product and the possibility of obtaining granulated silicates of other module at the same time. Keywords: sodium silicate, granulation, granulation by pressing method Read more: pdf-icon...
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Pressure agglomeration of hard and brown coals

Pressure agglomeration of hard and brown coals DZIK T., MARCINIAK-KOWALSKA J., MADEJSKA L. Please cite as: CHEMIK 2012, 66, 5, 445-452 The results of granulation of low quality hard coals and brown coal, with grain size under 2 [mm] were presented in the article. The influence of coal size analysis on the content of ash, sulfur and nitrogen were tested, as well as heat of combustion. The agglomeration tests were performed in closed die and the results were the basis for calculation of specific work in granulation process. The pelletizing experiments were made in granulator with flat die, with tha addition of sodium lignosulfonate as binder. The compressive strength of pellets was defined. Keywords: coal, granulation, pellet, energy, compressive strength Read more: pdf-icon...
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Preparation of lignocellulosic waste for combustion process

Preparation of lignocellulosic waste for combustion process ROBAK J., JANUSZ M., SOBOLEWSKI A. Please cite as: CHEMIK 2012, 66, 5, 436-444 Interest in usage of biomass in power industry is starting to notice the lignocellulosic waste biomass. Various origin of biomass is reason for major differences in its physicochemical properties, however, common feature is high disintegration and often large moisture content. Usage of such material as fuel causes not only technological problems with combustion, but also is a source of logistics problems, such as un/loading and transport efficiency. Following article shows effect of various compacting techniques of lignocellulosic waste preparation for its energetic utilization. Pros and cons of compacting using roll press, hydraulic press and pelletization has been highlighted. Keywords: granulation, briquetting, formed fuels, lignocellulosic waste Read more: pdf-icon...
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The pressure granulation of dolomite decarbonates for the production of refractory materials

The pressure granulation of dolomite decarbonates for the production of refractory materials NIESYT M., DZIK T., WYSZOMIRSKI P. Please cite as: CHEMIK 2012, 66, 5, 418-427 Decarbonated dolostones of Brudzowice, Ząbkowice, Żelatowa and Ołdrzychowice deposits were moulded under the following pressures: 20, 50 and 200 MPa. Authors found a significant impact of the moulding pressure in the hydration of pellets burnt at three various temperatures:1550, 1600 and1650oC. The highest resistance to hydration showed the samples obtained from Triassic dolostone of Brudzowice. On the contrary hydration of pellets obtained from dolostone of Ołdrzychowice runs quickly despite the formation pressure of 200 MPa and sintering temperature of 1650oC. The decarbonated samples obtained from this raw material require higher sintering temperature. Keywords: dolostone, granulation, dolomite decarbonate, doloma clinker, hydration, refractories Read more: pdf-icon...
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Studies on transport and granulation properties of superphosphate pulps

Studies on transport and granulation properties of superphosphate pulps SCHAB S., BISKUPSKI A., BOROWIK M., DAWIDOWICZ M. Please cite as: CHEMIK 2012, 66, 5, 396-405 The paper presents results of studies on changing pulp consistency of TSP, MSP, and USP based on mixing power and temperature measurements in their production, in a device designed for this purpose. Plots of mixing power and temperature changes in time were prepared for each test on the basis of results. Fertilizer granulation tests have been carried out on laboratory scale using TSP and USP pulps as the main raw material and granulation factor. Keywords: multicomponent fertilizers, superphosphate pulps, granulation, mixing power Read more: pdf-icon...
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Laboratory testing of coal sludge granulation

Laboratory testing of coal sludge granulation FELIKS J. Please cite as: CHEMIK 2012, 66, 5, 388-395 The article shows the results of tests of coal sludge granulation from the ?Piast? coal mine. Tests conducted on two types of granulators: vibrating chute and laboratory plate granulator. In the study, the sludge was mixed with additives to lower the humidity. Studies were conducted to determine the amount of additives necessary for industrial sludge granulation. Keywords: granulation, coal sludge, waste coal Read more: pdf-icon...
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The granulation – still important process

HEIM A. Please cite as: CHEMIK 2012, 66, 5, 356-359 In the article, different methods of getting some material in the granular form have been discussed as well as some advantage of this grainy material. It has been mentioned some national scientific centers, in which are being kept studies over this process. The history of Polish symposium ?The Granulation? has been brought out. Keywords: granulation, agglomeration. Read more: pdf-icon...
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