Study on Removal Arsenic from Iron Ore with Arsenic in Sintering Process

2011 ◽  
Vol 284-286 ◽  
pp. 238-241 ◽  
Author(s):  
Qing Lu ◽  
Shu Hui Zhang ◽  
Xiao Hu
Keyword(s):  
Reaction Temperature ◽  
Iron Ore ◽  
Arsenic Removal ◽  
Removal Rate ◽  
Decomposition Reaction ◽  
Holding Time ◽  
Sintering Process ◽  
Mass Content ◽  
Powder Content ◽  
Coke Powder

The physicochemical properties of iron ore with arsenic in South of China was analyzed by chemical analysis, XRD, high power microscope. The effects of various factors on arsenic removal in sintering process were studied and the optimal technique parameters were obtained. The results show that the mineral of iron ore with arsenic in South of China mainly is composed of magnetite and gangue, in which arsenic with 0.282% mass content exists as FeAsS and few as As2S3. The oxidation and thermal decomposition reaction of FeAsS occurs in sintering process. Under feeble oxidation atmosphere the arsenic removal rate of iron ore along with reaction temperature increases, and the holding time elongates, or the coke powder content rises. The optimal removal arsenic process parameter is: reaction temperature 1050~1100°C, holding time 8~15min, and coke powder content 6%.

Alkaline refining of crude lead: a method of arsenic removal and the behavior of arsenic in the process

2022 ◽  
Vol 119 (1) ◽  
pp. 105
Author(s):  
Rong Zhu ◽  
Hailin Long ◽  
Haoyu Li ◽  
Huimin Xie ◽  
Shaohua Yin ◽  
...  
Keyword(s):  
Reaction Temperature ◽  
Lead Oxide ◽  
Arsenic Removal ◽  
Removal Rate ◽  
Holding Time ◽  
Sodium Arsenate ◽  
Experimental Conditions ◽  
Lead Arsenate ◽  
Ft Ir ◽  
Refining Agent

In this work, the alkaline refining of arsenic in crude lead was studied with a mixture of sodium hydroxide and sodium carbonate as alkaline refining agents. Taking the arsenic removal rate as the research object, the effects of reaction temperature, holding time, Na2CO3:NaOH, the dosage of refining agent were investigated. The arsenic removal rate is 79.09% under the optimum experimental conditions as follows: reaction temperature 823 K, holding time 60 min, Na2CO3:NaOH 1:4, refining agent dosage 10%. The oxidation purification mechanism of arsenic was studied by XPS, SEM-EDS, XRD and FT-IR. The results show that arsenic in the crude lead is gradually oxidized by oxygen and lead oxide during arsenic removal process, and the arsenic trioxide is eventually converted into sodium arsenate (Na3AsO4) and lead arsenate (Pb2As2O7) in the slag.

Study on the Method of Lime Cream to Remove Sodium from Fly Ash Red Mud by Soda-Lime Sintering Process

2013 ◽  
Vol 726-731 ◽  
pp. 2790-2794
Author(s):  
Guang Hui Bai ◽  
Lin Lv ◽  
Tong Song Wang ◽  
Peng Cheng Li ◽  
Cai Ling He
Keyword(s):  
Fly Ash ◽  
Reaction Time ◽  
Reaction Temperature ◽  
Red Mud ◽  
Removal Rate ◽  
Soda Lime ◽  
Sodium Content ◽  
Sintering Process ◽  
Solid Ratio ◽  
Sodium Removal

It is the first time to remove sodium from the fly ash red mud by soda-lime sintering process to determine whether the fly ash red mud can be used in cement production. This paper studies the effects of the reaction time, the reaction temperature, the ratio of liquid to solid, and the amount of sodium removal agent on the removal of milk of lime method of fly ash red mud in sodium. The optimal reaction conditions are that: the reaction time is 120min, the reaction temperature is 90°C, the ratio of liquid to solid ratio is 6:1, and the ratio of sodium removal agent Ca (OH) 2 to the red mud of Na2O use ratio is 9:1. Under this condition, the sodium removal rate (Na2O, the same below) to 57.2%, the total sodium content in fly ash red mud decreases from 4.7% to 1.8% after sodium removal, achieving the expected goal.

Study on Treatment of Chromium(VI) Wastewater by Cuprous Oxide

2015 ◽  
Vol 713-715 ◽  
pp. 2909-2912
Author(s):  
Bin Zhao ◽  
Li Ke Zou ◽  
Guo Yong Li
Keyword(s):  
Photocatalytic Activity ◽  
Reaction Temperature ◽  
Cuprous Oxide ◽  
Oxide Catalyst ◽  
Removal Rate ◽  
Optimal Conditions ◽  
Chromium Vi

Cuprous oxide catalyst was prepared and applied as photocatalist to treat chromium (VI) in wastewater, and the photocatalytic activity of the cuprous oxide was studied. The optimal conditions for the treatment was as follows: the pH of wastewater was 3, the amount of catalysts was 0.3 g/L, the reaction temperature was 60°C. Under the optimal conditions, the removal rate of chromium (IV) in wastewater reached 50% in the presence of cuprous oxide catalyst.

A novel performance assessment method of the carbon efficiency for iron ore sintering process

2021 ◽  
Vol 106 ◽  
pp. 44-53
Author(s):  
Kailong Zhou ◽  
Xin Chen ◽  
Min Wu ◽  
Yosuke Nakanishi ◽  
Weihua Cao ◽  
...  
Keyword(s):  
Performance Assessment ◽  
Iron Ore ◽  
Assessment Method ◽  
Sintering Process ◽  
Iron Ore Sintering ◽  
Carbon Efficiency ◽  
Iron Ore Sintering Process ◽  
Ore Sintering

Arsenic Removal from Wastewater Using Adsorptive Mediums

2011 ◽  
Vol 189-193 ◽  
pp. 404-409
Author(s):  
Fu Quan Peng ◽  
Zhen Cheng Xu ◽  
Jian Hong Huang ◽  
Qing Wei Guo ◽  
Feng Nie
Keyword(s):  
Arsenic Removal ◽  
Removal Rate ◽  
National Standards ◽  
Ferrous Oxide ◽  
Anion Resin ◽  
Quartz Sands ◽  
Long Time ◽  
Removal Of Arsenic ◽  
Adsorptive Properties

Different adsorptive mediums and adsorbents’ compounds were chosen to remove arsenic from Yangzonghai Lake wastewater. Results showed that Ca(OH)2, attapulgite, bentonite, LDHs these adsorptive mediums had adsorptive capacities of less than 2.5 mg/g of As removal and it took long time for sediment before monitoring; adsorbents compounds’ results showed Fe2O3 and quartz sands had best removal rate and quartz sands had little removal of arsenic. Both strong anion resin and hydrated ferrous oxide-loaded on polystyrene diethanolamine resin(designated as PDR-HFO) can decrease As concentration to less than 0.01 mg/L reaching national standards for arsenic; anions such as SO42- can not be removed when strong anion resin was regenerated causing its loss of exchange ions; PDR-HFO exhibited excellent adsorptive properties and recyclability.

scholarly journals Formation of Nitrogen Mono Oxide (NO) during Iron Ore Sintering Process

2018 ◽  
Vol 58 (2) ◽  
pp. 236-243 ◽  
Author(s):  
Wei Lv ◽  
Xiaohui Fan ◽  
Xiaobo Min ◽  
Min Gan ◽  
Xuling Chen ◽  
...  
Keyword(s):  
Iron Ore ◽  
Sintering Process ◽  
Iron Ore Sintering ◽  
Iron Ore Sintering Process ◽  
Ore Sintering
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