Preparation of Iron Carbide from High Phosphorus Oolitic Hematite

2014 ◽  
Vol 881-883 ◽  
pp. 98-101
Author(s):  
Guang Qiang Li ◽  
Heng Hui Wang ◽  
Jian Yang ◽  
Jiang Hua Ma
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Iron Carbide ◽  
Xrd Analysis ◽  
Raw Material ◽  
Zonal Distribution ◽  
High Phosphorus ◽  
Hematite Ore ◽  
Oolitic Hematite Ore ◽  
Scanning Electron

In order to find a new way to utilize the high phosphorus oolitic hematite ore as raw material for steelmaking, the reduction and carburization of high phosphorus oolitic hematite by the gas of CH4-H2were studied. High phosphorus oolitic hematite, reduction and carburization products were investigated by the means of XRD and scanning electron microscope. The SEM-EDS and XRD analysis show that the main compositions of this ore are hematite and quartz, main microstructure is oolitic cluster with the zonal distribution of hematite and apatite, and iron carbide can be prepared from high phosphorus oolitic hematite.

Effect of Nickel on Titanium Carbide Synthesized via Tungsten Inert Gas (TIG) Method

2012 ◽  
Vol 620 ◽  
pp. 384-388
Author(s):  
Sharifah Aishah Syed Salim ◽  
Julie Juliewatty Mohamed ◽  
Zainal Arifin Ahmad ◽  
Zainal Arifin Ahmad
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Powder Mixture ◽  
Raw Material ◽  
Inert Gas ◽  
X Ray Diffraction ◽  
X Ray ◽  
Arc Melting ◽  
Elemental Powder Mixture ◽  
Scanning Electron

Numerous methods have been used to produce high purity TiC. There is no previous study has been reported on the formation using single elemental powders of Titanium (Ti) and Carbon (C) with addition Nickel (Ni) by tungsten inert gas (TIG) weld method. In this work, TiC was synthesized via TIG method by arc melting elemental powder mixture of Ti and C at ~5 second (s) and 80 ampere (A). The effect Ni contents on TiC formation was investigated. The mixed raw material was ball milled for 24 hours followed by synthesis via TIG method. The arced samples were characterized by X-ray diffraction (XRD) and Scanning electron microscope (SEM). It was revealed, that small amount of Ni additive to the metal powder allows the production of dense and tough TiC.

scholarly journals The influence of metahalloysite addition on tobermorite formation studied by X-ray powder diffraction and scanning electron microscope

2018 ◽  
Vol 163 ◽  
pp. 05008
Author(s):  
Anna Skawińska
Keyword(s):  
Phase Composition ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Hydrothermal Treatment ◽  
Powder Diffraction ◽  
Quartz Sand ◽  
Raw Material ◽  
Model Systems ◽  
X Ray ◽  
Scanning Electron

This paper presents the results of the studies carried out in the model systems and concerning the tobermorite synthesis with an addition of metahalloysite. Quartz sand and quicklime were the main raw material constituents. The mixtures in the form of slurries underwent hydrothermal treatment with an addition of metahalloysite (5%, 10%, 15%, 20% and 30%) for 4 hours and 12 hours. The resultant composites were analysed for their phase composition using X-ray powder diffraction. The microstructure was examined using the Scanning Electron Microscope. Tobermorite was the principle reaction product. When 30% metahalloysite was added to the mixture containing CaO and SiO2, the formation of katoite was found.

scholarly journals Changing the method of compaction of autoclaved building materials modified by diabase and barite aggregate.

2018 ◽  
Vol 174 ◽  
pp. 02014
Author(s):  
Katarzyna Komisarczyk ◽  
Anna Stępień ◽  
Ryszard Dachowski
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Building Materials ◽  
Raw Materials ◽  
Reference Sample ◽  
Raw Material ◽  
Natural Origin ◽  
Applied Technology ◽  
Silicon Ions ◽  
Scanning Electron

The traditional way of producing sand-lime products is connected with the use of three basic raw materials i.e. quartz sand of natural origin, water and quicklime ground lime. During hydrothermal treatment in an autoclave, chemical reactions take place between the calcium and silicon ions. As a result of these reactions, the products are created that provide advantageous appropriable traits. In order to improve the durability attributes of the discussed products, diabase and barite aggregate was introduced into the raw material mass. In addition, the change in the densification method of the silicate mixture was applied. Layering was replaced instead of traditional pressing. The article describes sand-lime products modified with diabase and barite aggregate in an amount up to 15% by weight. Two methods of thickening the sand-lime mixture were used: pressing and layering. The change of the applied technology significantly influences, among others for water absorption. The best result was obtained using 5% and 10% modifiers. Modification with 5% content of diabase aggregate and 5% content of barite aggregate increases the strength by over 60% in relation to the reference sample. The obtained properties are reflected in the image of the microstructure examined by means of the scanning electron microscope. In the sand- lime products, both traditional and modified with diabase and barite aggregates, the C-S-H phase and tobermorite is present. These phases are characteristic for autoclaved products, although depending on the method of thickening occur in varying degrees and intensities.

The Effect of CaCO3 Addition on Physical Properties of ZnO-Based Crystal Glaze

2012 ◽  
Vol 620 ◽  
pp. 12-16 ◽  
Author(s):  
Abdul Rashid Jamaludin ◽  
Shah Rizal Kasim ◽  
Zainal Arifin Ahmad
Keyword(s):  
Electron Microscope ◽  
Calcium Carbonate ◽  
Scanning Electron Microscope ◽  
Physical Properties ◽  
Crystallization Temperature ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

The effects of calcium carbonate (CaCO3) addition on the physical properties of ZnO-based crystal glaze batches were investigated. Samples were fired at different gloss firing temperatures ranging from 1180-1220°C with 3 hours soaking at 1060°C crystallization temperature. X-ray diffraction (XRD) analysis identifiedthe crystal phase occurred as willemite (Zn2SiO4) and the scanning electron microscope (SEM) analysis indicated that willemite crystals are in the acicular needle like shape that formed spherulite. The intensities of willemite peaks decreased with CaCO3 addition and completely vanished at 5.0 wt% CaCO3. Varied formation of spherulites developed of the surface of crystal glaze as the flows of the glaze stretched further as the amount of CaCO3 increased.

scholarly journals Synthesis of Hematite Pigment (Α-Fe2O3) from Iron Lathe Waste using Precipitation-Sonication Method as Anti-Swelling on Wood

2020 ◽  
Vol 1 (2) ◽  
pp. 69
Author(s):  
Dewi Elok Rahmawati ◽  
Lilik Miftahul Khoiroh ◽  
Rachmawati Ningsih ◽  
Febi Yusniyanti ◽  
Wariatus Solawati ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Raw Material ◽  
Degree Of Crystallinity ◽  
Precipitation Process ◽  
Swelling Properties ◽  
Pigment Synthesis ◽  
X Ray ◽  
Scanning Electron ◽  
Color Reader

<p class="02abstracttext"><span lang="PT-BR">Iron lathe waste powder has the potential as a raw material in the synthesis of hematite pigments. Hematite pigments have many advantages, one of which is anti-swelling properties that can maintain the dimensions of wood. Hematite pigment synthesis was carried out using the precipitation-sonication method. The precipitation stage uses an ammonium hydroxide solution as a precipitating agent. Stages of sonication using the PEG-6000 template were performed at different times were 30, 45, and 90 minutes then calcined at 750 ° C for 3 hours. The samples were characterized by X-ray diffraction (XRD), color reader, and scanning electron microscope-energy dispersive <br /> X-Ray (SEM-EDX). The result confirmed that a ferrihydrite phase obtained after the precipitation process and transform into hematite after the calcination process with the highest degree of crystallinity for 90-minute sonication. From a color reader, the brightness and redness degrees decrease with increasing time. Scanning electron microscope results illustrated that the morphology was not uniform with the particle size getting smaller with increasing sonication time. The EDX results show that hematite pigments still contain impurities such as carbon. The swelling test indicated that the highest stability in hematite-pigmented wood increased as increasing in the weight of pigment.</span></p>

Heat Preservation Time on the Properties of Red Mud Lightweight Insulation Brick

2014 ◽  
Vol 540 ◽  
pp. 225-228 ◽  
Author(s):  
Long Ma ◽  
Guo Zhong Li ◽  
Ji Rui Hu
Keyword(s):  
Electron Microscope ◽  
Fly Ash ◽  
Scanning Electron Microscope ◽  
Red Mud ◽  
Sintering Temperature ◽  
Raw Material ◽  
Sintering Process ◽  
Heat Preservation ◽  
Fluxing Agent ◽  
Scanning Electron

The red mud lightweight insulation brick was prepared by the sintering process as red mud, fly ash, bentonite as the main raw material, adding a certain amount of pore forming agent and fluxing agent. The sintering heat preservation time of red mud insulation brick on the properties was studied. The red mud lightweight insulation brick damage fracture microstructure was analyzed using scanning electron microscope (SEM) and the sintering mechanism was discussed preliminarily. The results show that with sintering temperature of 1100°C heating for 180 minutes, the performance of thermal insulation brick is better. When the heat preservation time extends to continue, the performances of sample remain stable basically.

Preparing and Sphericizing Ultrafine Graphite Particles with Stirred Mill

2014 ◽  
Vol 539 ◽  
pp. 785-789
Author(s):  
Ling Yan Zhang ◽  
Yang Shuai Qiu ◽  
Wei Hong ◽  
Cheng Cai Deng
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Weight Ratio ◽  
Raw Material ◽  
Graphite Particles ◽  
Study Results ◽  
Conditional Tests ◽  
Operation Parameters ◽  
Scanning Electron ◽  
Main Operation

The ultrafine graphite particles was prepared and sphericized by stirred mill. By the conditional tests, the influences of the main operation parameters, such as ball-to-powder weight ratio, grinding concentration, dispersant dosage, agitator speed on grinding efficiencies of stirred mill were studied systematically .The reasons of the influence was analyzed. The study results offered suitable operation parameters for practical production. The scanning electron microscope (SEM) was employed to investigate the structure of the ore sample. The result showed the sphericity of product was improved than the raw material.

scholarly journals Management of By-Product Created by Lye-Sodium Brine Purification Method Using Carbonization

2020 ◽  
pp. 82-89
Author(s):  
Paweł Iwański ◽  
Bartłomiej Igliński ◽  
Grzegorz Piechota
Keyword(s):  
Carbon Dioxide ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Waste Management ◽  
Raw Material ◽  
Purification Method ◽  
X Ray ◽  
Magnesium Compounds ◽  
Calcium And Magnesium ◽  
Scanning Electron

The article presents carbonization as a method of waste management from the brine sodium-lime method. It was compared with the previously obtained results for the lye-sodium one. Within it, the fltration and washing times were contrasted for treated and non-carbonised samples. For this aim potentiometric titration analysis was used to determine the precipitation's basic components and by-product brine. Scanning electron microscope with energy dispersive X-ray spectrum and diffractographic analysis were used for morphology analysis what allowed to determine the tested samples' composition. It was found that despite significant differences in the time of washing and filtration, the time of these processes is shortened after the suspension has been exposed to carbon dioxide. In both cases the composition allows the waste brine to be recycled to the purifcation processes and the mixture of calcium and magnesium compounds become alternative raw material. It turned out that in both methods it is possible to utilize the suspension formed.

Study on the Morphology of Nano-ZnO in Foam Glass

2011 ◽  
Vol 415-417 ◽  
pp. 598-601
Author(s):  
Fang Yun Yu ◽  
Qing Chi Sun ◽  
Wei Bing Ma ◽  
Dong Sheng Lv ◽  
Xiu Hua Li
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Growth Mechanism ◽  
Porous Glass ◽  
Foam Glass ◽  
Raw Material ◽  
Mass Ratio ◽  
Moderate Amount ◽  
Nano Zno ◽  
Scanning Electron

Nanoscale ZnO has received considerable attention due to its remarkable properties like absorbing wave. Foam glass containing nano-ZnO can enhance the property of wave absorbing. Investigating the morphology of nano-ZnO and researching the moderate amount of Zn filler in the foam glass are important. In the work, Zn filler was added into the porous glass to grow the nano-ZnO with no catalyst by Vapor-Solid mechanism. Foam glasses were fabricated by sintering mixture of pure foam glass raw material and Zn powder. The patterns of nano-ZnO were investigated by scanning electron microscope (SEM). Meanwhile, the detail of the growth mechanism of ZnO in foam glass was analysed. The results indicate that with the content of Zn increased, the granular nano-crystals become more, and the crystal whiskers become less, shorter, and a little thicker in pores. The diameter of the whiskers is about 50 nm. What’s more, the size of pores become small as Zn mass ratio increasing.

CuO Microspheres Synthesized via the Easy Hydrothermal Method

2012 ◽  
Vol 159 ◽  
pp. 84-87
Author(s):  
Xiao Ming Fu
Keyword(s):  
Electron Microscope ◽  
Reaction Time ◽  
Scanning Electron Microscope ◽  
Hydrothermal Method ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cuo Microspheres ◽  
Scanning Electron

CuO microspheres are successfully synthesized with CuCl2 as copper source and Na2CO3 as auxiliary salt at 240 °C for 24 h via the easy hydrothermal method. The phase and the morphologies of the samples have been characterized and analyzed by XRD (X-ray diffraction) and SEM (Scanning electron microscope), respectively. XRD analysis shows that the phase of as obtained samples is CuO. SEM analysis confirms that the increase of the reaction time, the reaction temperature and the auxiliary salt is propitious to synthesize CuO microspheres.

Sign in / Sign up

Export Citation Format

Share Document