Marta Wołosiewicz-Głąb

The research was conducted to investigate the efficiency and possibilities of advanced oxidation process based on ozone-hydrogen peroxide. The process was used as a post-treatment step of composting leachate utilisation. Leachate samples were collected from the typical composting plant with the...

The paper presents a study on the effectiveness of the grinding process in an electromagnetic mill devoted to ultrafine grinding, and the influence of processing parameters on the mill’s performance. The research was focused on the optimization of the duration of the grinding process and selection of the grinding media type in order to obtain the highest relative increase of the selected particle size fraction. Copper ore with a particle size between 0–1 mm was used in the experiments. A model was created that determines the relationship between the processing time and efficiency of the grinding, and can be used for the optimization of the process. A comparison of the relative growth of particle size fractions in milling products was performed. The obtained milling efficiency results measured by the growth of the analyzed particle size fraction in the milling product confirmed that the best grinding media set includes a grinding medium with a diameter of 1 mm and a length of 10 mm.

The article presents the impact of the separation parameters on the operation of the grinding and classification system using the electromagnetic mill and impingement-inertial classifier specially designed for this machine. Preliminary tests for the classifier have been carried out, and the effect of the separation efficiency on the value of the recycle flow that optimizes the operation of the grinding system is determined. Fourteen experiments were carried out to test and evaluate the classifier's work, with a variety of damping flaps acting on the airflow. The results provide an accurate assessment of the effectiveness and efficiency of the classifier. The approximation of the electromagnetic mill partition curves using the impingement-inertial classifier was performed by using Weibull distribution function.

E3S Web of Conferences, open access proceedings in environment, energy and earth sciences

This paper presents results of work on the reduction of toxic metal content while decreasing its oxygen activity. During the study the effects of different doses of ozone in the air used for aeration of the stabilized compost in the first post-thermophilic phase were analyzed. The results showed...

E3S Web of Conferences, open access proceedings in environment, energy and earth sciences

E3S Web of Conferences, open access proceedings in environment, energy and earth sciences

The paper presents the problem of obtaining the fine grained material in mills of different constructions. Various types of mills have been characterized, taking into account the type of grinding media used. Characteristics of selected mills and grinding media used were presented and the movement of the particles in the drum of the ball mill has been shown. Mills with mixed grinding media have been described. Model of "transport energy pulses" for free grinding media in the Kurrer’s tubular chamber of the vibratory mill were described. Paper discusses the advantages and opportunities for fine grinding in the electromagnetic mill, performance and in particular the energy cost of commimtion, that is achievable in this device.