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Items from 41 to 60 out of 486 576 results

article

Significance of reagents addition sequence on iron anionic reverse flotation and their adsorption characteristics using QCM-D

Ying Hou, Ahmed Sobhy, Yue Wang

Physicochemical Problems of Mineral Processing > 2021 > Vol. 57, iss. 1 > 284-–293

To explore the influence of reagents addition sequence of the pH regulator and the starch depressant on the anionic reverse flotation of iron oxide, flotation conditional experiments were performed on mixed low-intensity and high-gradient magnetic concentrates which is the flotation feed acquired from the iron processing plant. Besides, quartz crystal micro-balance with dissipative (QCM-D) was conducted...

article

An experimental study of removing impurity from a quartz ore by microbial flotation-acid leaching

Jujian Zhu, Shujuan Dai, Pengcheng Li, Shuyong Yang

Physicochemical Problems of Mineral Processing > 2021 > Vol. 57, iss. 1 > 18–-28

The purity of a quartz ore is relatively low at a SiO2 content of 97.18%, and the main impurity in the ore is Fe, Al, and Ca bearing minerals. The main component in an industrial waste bacteria (WJ) is polysaccharides, which may be used as depressors for inhibiting iron minerals in quartz flotation. Moreover, WJ belongs to microbial inhibitors because it is mainly composed of bacteria. As a result...

article

The influence of micro-morphology and micro-structure on fly ash triboelectrostatic beneficiation

Wenping Wang, Yinghua Chen, Li Haisheng, Haoran Dong, more

Physicochemical Problems of Mineral Processing > 2021 > Vol. 57, iss. 1 > 53--63

Fly ash is a complex system with a variety of fine particles. The complex relationship between unburned carbon and ash particles has an important influence on the efficiency of fly ash triboelectrostatic beneficiation. The particles adhered to the two electrode plates are collected through the triboelectrostatic beneficiation experiment. The scanning electron microscopy and X-ray fluorescence are...

article

Strengthening the rough selection effect of n-ethyl o-isopropyl thionocarbamate (Dow: Z-200) on chalcopyrite by ultrasonic pretreatment

Yan Wang, Yubin Wang, Bo Yu, Xin Wang, more

Physicochemical Problems of Mineral Processing > 2021 > Vol. 57, iss. 1 > 64–-74

In this study, the properties of (CH3)2CHOC(S)NHC2H5(Dow: Z-200) after the ultrasonic pretreatment was characterized by employing surface tension, viscosity, and Fourier transform infrared (FTIR) spectroscopy, and its influence on chalcopyrite rough selecting was investigated. The results indicate that the pretreated Z-200 can improve the index of chalcopyrite roughing. And, under the same reagent...

article

Dynamic analysis of a dashpots equipped vibrating screen using finite element method

Hamid Khoshdast, Saeid Jalilifard, Hami Khoshdast

Physicochemical Problems of Mineral Processing > 2021 > Vol. 57, iss. 1 > 112–-126

Even though vibrating screens have been used in mining industries for over a century, their use has often been cited as challenging in terms of understanding its dynamic responses to different operating factors, particularly those that affect the structural aspects. Among the various aspects of screen design, the control of vibrational energies imposed on various parts of the screen is of particular...

article

Effect of polyacrylamide on the process of removing impurities in the rare earth leachate

Xiaoyan Wu, Fang Zhou, Chufan Liu, Jian Feng, more

Physicochemical Problems of Mineral Processing > 2021 > Vol. 57, iss. 1 > 182–-191

The impurity removal process of the rare earth (RE) leachate is usually accompanied by the formation of flocs, and a certain amount of polyacrylamide flocculant needs to be added in this process. However, few studies have investigated the effect of the flocculant on the impurity removal process. Therefore, this paper compares the influence on the process of removing impurities with or without the...

article

Activation mechanism of tantalum niobium flotation by lead ions in a combined collector flotation system

Mingfei He, Shuangke Li, Miao Cao, Yude Gao, more

Physicochemical Problems of Mineral Processing > 2021 > Vol. 57, iss. 1 > 29–-38

The effect of lead ions on the flotation activation of tantalum niobium ore (TNO) was studied by micro-flotation, adsorption capacity experiments, solution chemical composition calculations, and infrared spectral analysis. The experimental demonstrated that the combined collector of salicylhydroxamic acid (SHA) and ammonium dibutyl dithiophosphate (ADDP) resulted in a strong collection capacity for...

article

Study on surface modification of cerussite by thermochemical processing with pyrite

Yong-Xing Zheng, Ji-Lai Ning, Haiyun Xie, Jin-Fang Lv, more

Physicochemical Problems of Mineral Processing > 2021 > Vol. 57, iss. 1 > 156–-167

In this paper, surface modification of cerussite by thermochemical processing with pyrite was studied based on microflotation tests, X-ray powder diffractometry (XRD), X-ray photoelectron spectroscopy (XPS) and electron probe microanalysis (EPMA). Microflotation test results showed that the surface modification facilitated flotation of the treated cerussite and improved the flotation recovery to approximately...

article

The effect of ethylene oxide groups in dodecylamine polyoxyethylene ether on rutile flotation

Junwei Huang, Qian Chen, Yuxuan Mao, Hongqiang Li

Physicochemical Problems of Mineral Processing > 2021 > Vol. 57, iss. 1 > 127–-135

To study the number of ethylene oxide (EO) groups effect on the flotation of rutile, three collectors with different EO number were evaluated: AC1203 (with three EO number), AC1210 (with ten EO number), AC1215 (with fifteen EO number). In addition to the flotation experiments, zeta potential measurements, collector adsorption experiments and XPS analysis were conducted to elucidate the adsorption...

article

Cassiterite recovery from a sulfide ore flotation tailing by combined gravity and flotation separations

Limin Zhang, Sultan Ahmed Khoso, Mengjie Tian, Wei Sun

Physicochemical Problems of Mineral Processing > 2021 > Vol. 57, iss. 1 > 206–-215

Cassiterite (SnO2), which is the most important Sn-containing mineral, is extensively found in large quantities in discarded tailings. The recovery of cassiterite from discarded sulfide ore flotation tailings can reduce resource wastage and environmental pollution. The gravity separation technique can recover multiple valuable minerals, such as cassiterite, whose densities considerably differ from...

article

Analysis of the Mechanical Properties of the Titanium Layer Obtained by the Mold Cavity Preparation Method

A. Dulska, J. Szajnar, M. Król

Archives of Metallurgy and Materials > 2021 > Vol. 66, iss.1 > 51--56

The article presents the technology of layered casting with the use of 3D printing to make a frame insert. The insert was made of powdered titanium and then filled with liquid cast iron. The paper presents the results of research, including structure observation and hardness measurements, as well as abrasion resistance tests. The results indicate the possibility of creating a local reinforcement using...

article

Influence of Molding Materials on the Self-Hardening of X46Cr13 Steel / Grey Cast Iron Bimetallic Castings

N. Przyszlak, T. Wróbel, A. Dulska

Archives of Metallurgy and Materials > 2021 > Vol. 66, iss.1 > 43--50

The paper presents the problem which concerning the technology of bimetallic castings in materials configuration: high-chromium steel as the working layer and grey cast iron as the base part. The aim of the studies was integrate the process of manufacturing of bimetallic casting with the heat treatment of hardening type of X46Cr13 steel insert by applying the mould with sandmix on a matrix of chromite...

article

The Analysis of Filler Material Effect on Properties of Excavator Crawler Track Shoe after Welding Regeneration

M. Gucwa, J. Winczek, P. Wieczorek, M. Mičian, more

Archives of Metallurgy and Materials > 2021 > Vol. 66, iss.1 > 31--36

The application of hardfacing is one of the ways to restore the functional properties of worn elements. The possibility of using filler materials rich in chrome allows for better wear resistance than base materials used so far. The paper presents the results of research on the use of 3 different grades of covered electrodes for the regeneration of worn track staves. The content of the carbon in the...

article

Influence of Heat Treatment and Nickel Content on the Properties of the GX4CrNi13-4 Steel

V. Kaňa, V. Krutiš, P. Bořil, A. Záděra, more

Archives of Metallurgy and Materials > 2021 > Vol. 66, iss.1 > 37--41

For the EN GX4CrNi13-4 martensitic stainless steel, research was conducted to investigate the impact of the quenching intensity and the content of nickel on the mechanical properties and amount of retained austenite. It was found that the amount of retained austenite significantly increases with growing nickel concentration. On the other hand, the cooling rate at quenching makes a difference only...

article

Study of the Properties of the AlSi9Cu3 Alloy Depending on the Ratio of Returnable Material in the Batch

M. Matejka, D. Bolibruchová, M. Chalupová

Archives of Metallurgy and Materials > 2021 > Vol. 66, iss.1 > 15--23

Recycling of aluminium returnable material through its reuse is now an essential component of the production of aluminium alloy castings. The main goal is to find a suitable ratio of the primary alloy and the returnable material in the batch, thus determining the right compromise between the price and the quality of the casting. Experimental alloys were evaluated by thermal analysis, combination of...

article

Benefit Effect of Low Addition Yttrium on the Phase α_Mg and eutectic α_Mg+γ(Mg₁₇Al₁₂) in AZ91 Alloy

D. Mikusek, C. Rapiejko, A. Andrzejczak, T. Pacyniak

Archives of Metallurgy and Materials > 2021 > Vol. 66, iss.1 > 57--63

This paper presents results of a study of the effect of inoculation of yttrium on the microstructure of AZ91 alloy. The con-centration of the inoculant was increased in samples in the range from 0.1% up to 0.6%. The influence of Y on the thermal effects resulting from the phase transformations occurring during the crystallisation at different inoculant concentrations were examined with the use of...

article

The Oxide Scales Formed on Different Co-Ni Based Superalloys During Isothermal Oxidation at 800 and 900°C

D. Migas, M. Kierat, G. Moskal

Archives of Metallurgy and Materials > 2021 > Vol. 66, iss.1 > 5--14

In this investigation, the formation of oxide scales on different Co-Ni based superalloys of γ–γ′ type was analyzed. Co-20Ni-7Al-7W (at.%) alloy as well as its W-free modifications based on Co-Ni-Al-Mo-Nb and Co-Ni-Al-Ta systems was analyzed under conditions of high temperature oxidation at 800 and 900°C. Therefore, the alloys were isothermally oxidized at selected temperatures for 100 h in laboratory...

article

Application of Non-Silica Sands for High Quality Castings

J. Beňo, M. Poręba, T. Bajer

Archives of Metallurgy and Materials > 2021 > Vol. 66, iss.1 > 25--30

The goal of this article is to application of non-silica sands based on alumininosilicates as an alternative of traditionally used chromite sand for alloyed steel and iron castings. Basic parameters as bulk density, pH value of water suspension, refractoriness, grain shape of the testing sands were evaluated. Also mechanical properties of furan no-bake moulding mixtures with testing sand were determined...

article

Effect of Ti on Selected Properties of AlSi7Mg0.3Cu0.5 Alloy with Constant Addition of Zr

D. Bolibruchová, M. Kuriš, M. Matejka, K. Major-Gabryś, more

Archives of Metallurgy and Materials > 2021 > Vol. 66, iss.1 > 65--72

The article is focused on the synergic effect of constant content of Zr and higher content of Ti on mechanical properties Al-Si alloy. The Ti additions were in proportions of 0.1, 0.2 and 0.3 wt.% Ti. The casting process was carried out in ceramic molds, created for the investment casting technology. Half of the experimental samples were processed by precipitation curing T6. Themeasured results were...

article

The Influence of Hyperquenching Temperature on Microstructure and Mechanical Properties of Alloy Cast Steel GX2CrNiMoCuN 25-6-3-3

P. Jurczyk, T. Wróbel, C. Baron

Archives of Metallurgy and Materials > 2021 > Vol. 66, iss.1 > 73--80

The paper presents the research results concerning the chromium-nickel-molybdenum duplex cast steel GX2CrNiMoCuN 25-6-3-3 grade. The aim of studies was the description of the influence of hyperquenching temperature T_p i.e. 1100, 1125 and 1150°C on microstructure and mainly mechanical properties i.e. tensile strength UTS, yield strength YS, hardness HB, elongation EL and impact energy KV of duplex...

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Search results

Significance of reagents addition sequence on iron anionic reverse flotation and their adsorption characteristics using QCM-D

An experimental study of removing impurity from a quartz ore by microbial flotation-acid leaching

The influence of micro-morphology and micro-structure on fly ash triboelectrostatic beneficiation

Strengthening the rough selection effect of n-ethyl o-isopropyl thionocarbamate (Dow: Z-200) on chalcopyrite by ultrasonic pretreatment

Dynamic analysis of a dashpots equipped vibrating screen using finite element method

Effect of polyacrylamide on the process of removing impurities in the rare earth leachate

Activation mechanism of tantalum niobium flotation by lead ions in a combined collector flotation system

Study on surface modification of cerussite by thermochemical processing with pyrite

The effect of ethylene oxide groups in dodecylamine polyoxyethylene ether on rutile flotation

Cassiterite recovery from a sulfide ore flotation tailing by combined gravity and flotation separations

Analysis of the Mechanical Properties of the Titanium Layer Obtained by the Mold Cavity Preparation Method

Influence of Molding Materials on the Self-Hardening of X46Cr13 Steel / Grey Cast Iron Bimetallic Castings

The Analysis of Filler Material Effect on Properties of Excavator Crawler Track Shoe after Welding Regeneration

Influence of Heat Treatment and Nickel Content on the Properties of the GX4CrNi13-4 Steel

Study of the Properties of the AlSi9Cu3 Alloy Depending on the Ratio of Returnable Material in the Batch

Benefit Effect of Low Addition Yttrium on the Phase α_Mg and eutectic α_Mg+γ(Mg₁₇Al₁₂) in AZ91 Alloy

The Oxide Scales Formed on Different Co-Ni Based Superalloys During Isothermal Oxidation at 800 and 900°C

Application of Non-Silica Sands for High Quality Castings

Effect of Ti on Selected Properties of AlSi7Mg0.3Cu0.5 Alloy with Constant Addition of Zr

The Influence of Hyperquenching Temperature on Microstructure and Mechanical Properties of Alloy Cast Steel GX2CrNiMoCuN 25-6-3-3

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