scholarly journals The potential of using of alkaline earth bentonite clays of Ukraine in the production of iron ore pellets

2020 ◽  
Vol 1,2020 (1,2020 (124)) ◽  
pp. 36-43
Author(s):  
Chuprinov E ◽  
Lyalyuk V ◽  
Zhuravlev F ◽  
Kassim D ◽  
Lyakhova I
Keyword(s):  
Chemical Composition ◽  
Alkaline Earth ◽  
Iron Ore ◽  
Bentonite Clay ◽  
Rheological Characteristics ◽  
Iron Ore Pellets ◽  
Ore Pellets ◽  
Exchange Complex ◽  
Bentonite Clays

Objective: to analyze and determine the potential of alkaline earth bentonite clays of Ukraine for use as a binder in the production of iron ore pellets. Methods: performing rheological studies of bentonite clay samples and their chemical analysis, electron microscopic studies of samples. Results: the analysis of the chemical composition and requirements for the rheological characteristics of bentonite clays used in the production of iron ore pellets at metallurgical enterprises of Russia and Ukraine is carried out. The swelling indicators and water absorption of monoionic forms of bentonites of some deposits in water of different hardness are given. The quality of pellets with bentonites, that have a different exchange complex, during an industrial water of various hardness usage is examined. The analysis of the mineralogical and chemical composition, as well as the size and composition of the exchange complex of alkaline-earth bentonite clays of the Cherkassk deposit (Ukraine), which has the largest reserves of such clays in the CIS is carried out. It is shown that clays suitable for the production of pellets are located near the surface of the earth. A comparative analysis of the strength characteristics of pellets using bentonites with an alkaline and alkaline-earth exchange complex is presented. Scientific novelty: it was shown that despite the low swelling of alkaline-earth bentonites, the quality of pellets with these bentonites, in some cases, is slightly lower, and in certain conditions is not inferior to the quality of pellets with alkaline bentonites at the same flow rate. Practical significance: for real industrial conditions it is shown that the increase in water hardness leads to partial or complete (depending on the value of hardness) replacement of alkaline exchange complex with alkaline earth and conversion of alkaline bentonite clay into alkaline earth with corresponding rheological characteristics, deterioration of lumps and the need to increase the content of bentonite in the charge. In the case of increased hardness of water in the concentrate, it is economically feasible to use in the production of alkaline earth pellets bentonite clay, if it is cheaper than alkaline.

scholarly journals Material composition and characteristics of bentonite clays used as a binder in the production of iron ore pellets

2020 ◽  
Vol 76 (1) ◽  
pp. 30-40 ◽  
Author(s):  
F. M. Zhuravlev ◽  
E. V. Chuprinov ◽  
V. P. Lyalyuk ◽  
D. A. Kassim ◽  
I. A. Lyakhova
Keyword(s):  
Alkaline Earth ◽  
Iron Ore ◽  
Raw Material ◽  
Chemical Compositions ◽  
Iron Ore Pellets ◽  
Ore Pellets ◽  
Exchange Complex ◽  
Bentonite Clays ◽  
In Cis

In the production of iron ore pellets, binding additives are used, in particular, bentonite clays. At present, instead of alkaline bentonite clays used before, the alkaline-earth bentonite clays modified by soda ash are used, supplied from abroad. There is a whole number of bentonite clays deposits in Russia and Ukraine having reserves of the raw material accounting hundreds of million tons, which are not used in the industry because of absence of planned and proper studies of their applicability for pellets production. The analysis of chemical composition carried out and requirements to rheological characteristics of bentonite clays used in the iron ore pellets production at steel-works of Russia and Ukraine determined. Indicators of swelling and water absorption of mono-ionic forms of bentonite of some deposits in water of various hardness presented. Quality of pellets with bentonites, having different exchange complex when using technical water of various hardness considered. Analysis of mineralogical and chemical compositions, as well as value and content of exchange complex of alkaline-earth bentonite clays of Cherkassk deposition, Ukraine, accomplished. The deposition has the largest reserves of such clays in CIS. It was shown, that clays suitable for pellets production, are located near the earth surface. Comparative analysis of strength indicators of pellets, produced with bentonite application with alkaline and alkaline-earth complexes, carried out. It was shown, that despite the low swelling of alkaline-earth bentonites, the quality of pellets, produced with those bentonites is sometimes a little lower, but under definite conditions does not yield to the quality of pellets with alkaline bentonites at the same their consumption.

Evaluation of the quality of iron ore pellets

Metallurgist ◽  
1974 ◽  
Vol 18 (10) ◽  
pp. 734-736
Author(s):  
G. A. Grebenkin ◽  
E. A. Pakhomov ◽  
V. I. Konev
Keyword(s):  
Iron Ore ◽  
Iron Ore Pellets ◽  
Ore Pellets

scholarly journals PRODUCTION OF IRON ORE PELLETS BY UTILIZATION OF SUNFLOWER HUSKS

2021 ◽  
Vol 27 (4) ◽  
pp. 167-171
Author(s):  
Andrii Koveria ◽  
Lina Kieush ◽  
Maksym Boyko ◽  
Maksym Yaholnyk ◽  
Natalia Poliakova
Keyword(s):  
Natural Gas ◽  
Global Economy ◽  
Iron Ore ◽  
Steel Production ◽  
Iron And Steel ◽  
Iron Ore Pellets ◽  
Ore Pellets ◽  
Iron Ore Pellet ◽  
Mitigate Climate Change

Steel production is the most dynamic industry and one of the key sectors for the development of the global economy. The growing production of iron ore increases the need for its beneficiation and granulating for subsequent use in the production of iron and steel. As a result, the number of CO2 emissions and harmful substances increases, which negatively affects both society and the environment. It is important to study the use of biomass for the production of iron ore pellets. Lignocellulosic biomass is a renewable and sustainable source of heat and energy that can mitigate climate change. The efficiency of using sunflower husks on the combined machine “straight grate - rotary kiln - annular cooler” to partially replace natural gas in the production of iron ore pellets has been studied. The influences of alternative fuel use on technological indicators of the process and quality of iron ore pellets have been analyzed. It was found that the combustion of sunflower husks generates enough heat to obtain iron ore pellets with good strength. The main indicators of the quality of iron ore pellets remain at the same level as the iron ore pellet quality when using natural gas.

Study of bentonite clays influence on quality indicators of pellets

2020 ◽  
Vol 76 (2) ◽  
pp. 116-122
Author(s):  
F. M. Zhuravlev ◽  
E. V. Chuprinov ◽  
V. P. Lyalyuk ◽  
D. A. Kassim ◽  
I. A. Lyakhova
Keyword(s):  
Alkaline Earth ◽  
Dynamic Strength ◽  
Mineralogical Composition ◽  
Ore Pellets ◽  
Natural Mixture ◽  
The Absolute ◽  
Bentonite Clays ◽  
The Impact ◽  
Compression Resistance

Quality of iron ore pellets depends on many factors, including the type and properties of binding materials, in particular, bentonite clays. Laboratory studies of bentonite clays, differing by mineralogical composition and exchange ion complex. To assess the metallurgical characteristics of the pellets obtained with various kinds of binders, the moisture of the pellets, the compressive strength of the wet and dry pellets, the number of the wet pellets discards without destroying, and the “shock” temperature were determined. The carried out tests have shown that the impact strength and compression resistance of wet pellets at a slightly increased specific consumption of bentonite of cherkasy alkaline-earth bentonite does not concede to the correspondent properties of pellets with application of alkaline saryugyshsky bentonite as the binder. It was shown that clays of the IV layer, which are a natural mixture of alkaline-earth bentonite of the II layer and palygorskite III layer of the Cherkassky deposit, are favorable, to ensure good quality of the raw pellets. Tests of composite mixtures of clays IV with II and II with III layers showed that the quality of raw pellets with cherkassky bentonite is slightly worse comparing with sarygyuhsky one, however, the absolute values of their indicators satisfy the industry requirements. Tests of pelletizing of charges with different wetness, with the addition of 0.5% alkaline bentonite and a mixture of clays of the IV and II layers of the cherkassky deposit were carried out. It was shown, that with wetness increasing, pellets with both types of binder additives show the increase of the dynamic strength, porosity and temperature of the “shock” with a minimum difference in the absolute values of indicators with different binders. For confirmation of the possibility of using alkaline-earth bentonite of the Cherkassky deposit (II–III–IV layers) in the production of pellets, it is necessary to accomplish comparative industrial tests at a pelletizing plant (for example, at SevGOK), which uses a concentrate and industrial water of increased hardness.

The Use of Bentonite Clays from the Voskresensk Deposit to Make Iron-Ore Pellets

Metallurgist ◽  
2014 ◽  
Vol 58 (5-6) ◽  
pp. 367-371
Author(s):  
A. N. Shapovalov ◽  
A. V. Zavodyanyi
Keyword(s):  
Iron Ore ◽  
Iron Ore Pellets ◽  
Ore Pellets ◽  
Bentonite Clays

Effect of Blaine Fineness on the Quality of Hematite Iron Ore Pellets for Blast Furnace

2014 ◽  
Vol 36 (2) ◽  
pp. 83-91 ◽  
Author(s):  
Jagannath Pal ◽  
Satadal Ghorai ◽  
Sanjay Agarwal ◽  
Bikash Nandi ◽  
Tapas Chakraborty ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Iron Ore Pellets ◽  
Ore Pellets

Effect of mechanical charge activation in a disintegrator on the quality of iron-ore pellets

Metallurgist ◽  
1983 ◽  
Vol 27 (3) ◽  
pp. 77-80
Author(s):  
F. M. Zhuravlev ◽  
E. L. Druz' ◽  
A. A. Davidyuk ◽  
I. A. Khint ◽  
L. A. Drozhilov ◽  
...  
Keyword(s):  
Iron Ore ◽  
Iron Ore Pellets ◽  
Ore Pellets ◽  
Mechanical Charge

scholarly journals The transition to the production of non-bentonite highly basic iron ore pellets on a flux bond is a real solution to the complex problems of raw material preparation and the blast furnace process

2019 ◽  
pp. 2-5
Author(s):  
Zh.V. Svyrydenko ◽  
M.V. Yagolnik ◽  
V.M. Zakharchenko
Keyword(s):  
Iron Ore ◽  
Raw Materials ◽  
Bentonite Clay ◽  
Raw Material ◽  
Practical Significance ◽  
Blast Furnaces ◽  
Iron Ore Pellets ◽  
Ore Pellets ◽  
Output Increase ◽  
Technical And Economic Indicators

Purpose. Show the possibility of producing bentonitic iron ore pellets with basicity of 0.6-1.2 on a flux bond. Methodology. Testing the properties of the flux binder in the production of pellets at different stages of technology. Analysis of the properties of the obtained pellets and technical and economic indicators of the operation of the firing conveyor machine during the periods of pellet production using bentonite clay and using a flux bond. Results. The advantages of the flux ligament compared to the bentonite are shown. The characteristics of the experimental pellets are given and the economic efficiency of using this technology is proved (bentonite output, increase in iron content, as well as the productivity of roasting machines up to 10%). The scientific novelty of the work lies in the fact that the formation mechanism and the rate of hydration of the flux bond as well as the time of formation of the colloidal binder solution have been clarified. A method of preparing a binder flux has been developed, which allows taking into account all the features of the raw materials and the existing products in the agglomeration factories. The practical significance lies in the possibility of introducing a technology for the production of pellets on a flux bundle in the conditions of any mining plant, which allows: to get rid of the use of bentonite clay, to increase the productivity of kiln machines, to reduce the consumption of limestone and coke in blast furnaces, to increase the productivity of blast furnaces. Il 3. Tab. 3. Bibliogr .: 3 titles. Keywords: non-bentonitic pellets, flux binder, efficiency.

Effect of the Composition and Characteristics of the Charge Materials on the Quality of Iron-Ore Pellets

Metallurgist ◽  
2015 ◽  
Vol 59 (3-4) ◽  
pp. 212-215 ◽  
Author(s):  
A. S. Timofeeva ◽  
T. V. Nikitchenko ◽  
V. V. Fedina ◽  
V. O. Kazartsev
Keyword(s):  
Iron Ore ◽  
Charge Materials ◽  
Iron Ore Pellets ◽  
Ore Pellets ◽  
Effect Of The Composition
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