Interaction of a potassium silicate binder with impurity components during formation of KC1 granules by the pelletizing method
The relevance of the work is caused by the significant impact of impurities in the cyclonic dust of potassium chloride on the quality of the granulated KC1 obtained by the method of treating the pellets, as well as by the necessity to assess the products of interaction of silicate binder (potassium...
| Main Authors: | , |
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| Format: | Article |
| Language: | Russian |
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Tomsk Polytechnic University
2017-11-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya-tpu.ru/archive/article/view/1936 |
| Summary: | The relevance of the work is caused by the significant impact of impurities in the cyclonic dust of potassium chloride on the quality of the granulated KC1 obtained by the method of treating the pellets, as well as by the necessity to assess the products of interaction of silicate binder (potassium silicic) with impurity components. The main aim of the research is to study the interaction of a silicate binder (potassium silicate) used for granulating potassium chloride with impurity components of cyclone dust KC1 and to evaluate the effect of interaction products on pellet characteristics obtained by pelletizing. The methods used in the study: the method of scanning electron microscopy, which is the main source of information about the state of the surface of the object; method of thermodynamic analysis, which allows determining the probability of reactions and the possibility of formation of new phases on KC1 granules; the method of qualitative analysis on the Bruker TENSOR 27 IR Fourier spectrometer with application of the «ATR Miracle» attachment used to prove the progress of transfer of octadecylamine hydrochloride to the base form, when it is treated with a solution of silicate binder (potassium silicate). The results. The authors have determined the products of interaction of potassium silicate with impurity components: calcium, magnesium, iron chloride, amine hydrochloric acid, present in the cyclonic dust of flotation potassium chloride at formation of KC1 granules by the pelletizing method. The effect of the interaction products on the granules obtained by the pelletizing method was estimated. With the help of electron-scanning microscopy, it is established that when ammonium chloride solution is applied to the surface of a hydrochloric amine solution, the amines are transformed into the basic form, while the continuous amine film is destroyed, globules are formed, and during crystallization the microcrystals of the binder (potassium silicic acid) crystallize. It was proved that the treatment of octadecylamine hydrochloride with a solution of potassium silicic acid leads to the transfer of octadecylamine hydrochloride to the base form, but the reaction is not complete and a part of the octadecylamine hydrochloride remains in the hydrophobic form, adversely affecting the granulation. |
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| ISSN: | 2500-1019 2413-1830 |