Characterization of Minerals, Metals and Materials: Minerals Processing and Analysis II
Sponsored by: TMS Extraction and Processing Division, TMS: Materials Characterization Committee
Program Organizers: Jian Li, CanmetMATERIALS; Mingming Zhang, Baowu Ouyeel Co. Ltd; Bowen Li, Michigan Technological University; Sergio Monteiro, Instituto Militar de Engenharia; Shadia Ikhmayies; Yunus Kalay, Middle East Technical University; Jiann-Yang Hwang, Michigan Technological University; Juan Escobedo-Diaz, University of New South Wales; John Carpenter, Los Alamos National Laboratory; Andrew Brown, Devcom Arl Army Research Office
Tuesday 8:30 AM
February 25, 2020
Room: Theater A-8
Location: San Diego Convention Ctr
Session Chair: Zhiwei Peng, Central South University; Chenguang Bai, Chongqing University
8:30 AM
Experimental Research on Pellet Production with Boron-containing Concentrate: Tian Yunqing1; Qing Gele1; 1Research Institute of Technology, Shougang Group Corporation
in this paper,the application of a kind of fine grinding hematite powder in pellets was studied. The results show that the Ball forming performance of fine grinding hematite was good, the bursting temperature of the green balls was above 650 ℃. The drop number, and compressive strength increased with the increase of the ratio of fine grinding of hematite. The compressive strength of the roasting pellet was above 2700N, which can meet the production requirements. The SiO2 content of the pellet increased with the increase of the ratio of fine grinding hematite, and the reduction swelling rate of the pellet decreased significantly.
8:50 AM
Nano-particle Products Extracted from the Low-grade Laterite Minerals: Qiuju Li1; 1Shanghai University
There was no efficitive economical method for extraction nickel from low-grade laterite nickel ore. A multi-step process to deal with low-grade lateritic nickel ore was proposed to produce nano-silica, ferric oxide and nickel oxide, and the disposal was environmental friendly. The technique of XRF, ICP, XRD and SEM-EDS were used to character the chemical composition, mineral phases and physical chemical properties. The thermodynamic analysis has proved the feasibility of sulfuric acid leaching. The results showed that sulfuric acid leaching laterite nickel ore can produce silica, Ferric oxide and nickel oxide with the particle size in 50~80 nm.
9:10 AM
Study on the Influence of Limestone and Hydrated Lime on Pelletizing: Gele Qing1; Zhixing Zhao1; Minge Zhao1; Yunqing Tian1; Li Ma1; 1Shougang Group
With the increase of the proportion of pellets in blast furnace, it is necessary to increase the basicity of pellets in order to maintain the acid-base balance of burden. In this paper, the effect of two kinds of fluxes as limestone and hydrated lime on pelletizing, roasting and pellet quality were studied. The test results show that hydrated lime is beneficial to improve the pelletizing and green pellet quality, which is useful to decrease the bentonite ratio and pellet SiO2 content. The proportion of bentonite can be reduced to 0.2% while using hrydrated lime and SiO2 content of pellet can be decreased to 2.0%. The decomposition heat consumption of hydrated lime is lower than limestone,which has less effect on pellet compressive strength under same roasting temperature.
9:30 AM Cancelled
Leaching of Platinum Group Metals from Automobile Spent Catalyst: Sujun Lu1; Dalin Chen1; Peng Zhang1; Guoju Chen1; Yan Zhang1; Yujun Pan2; Ruikang Wang2; Jinxi Qiao2; Xintao Sun2; Ailiang Chen2; 1State Key Laboratory of Nickel and Cobalt Resources Comprehensive Utilization;Jinchuan Group Co. Ltd; 2Central South University
The automobile spent catalyst is leached for recovering platinum group metals using oxidizing acid leaching. Hydrogen peroxide is regarded as oxidant and hydrochloric acid as leaching reagent. The experimental results show that the best conditions are as follows: the concentration of hydrochloric acid is 6mol/l, the liquid-solid ratio is 10:1, the reaction temperature is 95°C, the volume ratio of hydrogen peroxide to raw material is 5ml/g, and the reaction time is 2h. Under the above conditions, the leaching ratio of platinum, palladium and rhodium are 93.9%, 99.8% and 86.9%, respectively.. In this study, the platinum group metal is directly recovered from the automobile spent catalyst, achieving a good leaching effect. This provides a feasible method for the effective treatment of the automobile spent catalyst.
9:50 AM Cancelled
Characterization on the Behaviors of Ca and Si Constituents during the Consolidation of Ferruginous Manganese Ores: Bingbing Liu1; Ruijie Li1; Shengpeng Su1; Yuanbo Zhang2; 1Zhengzhou University; 2Central South University
Consolidation of the ferruginous manganese ore fines is of vital importance for manganese extraction in the smelting process. The main impurities in the Fe-Mn ores are Ca and Si constituents, and they have significant effect on the consolidation of iron and manganese oxides. In this study, characterization on the behaviors of Ca and Si constituents during the roasting process of Fe-Mn ores were investigated by thermodynamic, fusion temperatures and phase identification analyses. The results showed that the melting temperature of the MnO2-Fe2O3 system was over 1600oC, while the Ca and Si constituents can decrease the fusion temperature dramatically due to the formation of low-melting complicate silicates from the CaO, SiO2 and partial manganese and iron oxides. The high-melting solid manganese ferrites phase generated from the remaining manganese and iron oxides were bonded and solidified by the liquid phase. This provided favorable mineralization conditions for the consolidation of Fe-Mn ore.
10:10 AM Break
10:30 AM Cancelled
Pb(II) Removal from Acid Wastewater by Magnetic Manganese Ferrites Synthesized from Ferromanganese Ores: Jia Wang1; Zijian Su1; Manman Lu1; Juan Wang1; Yuanbo Zhang1; 1Central South University
Pb(II) is a typical toxin in industrial wastewater, which has significant pollution risk for drinking-water sources. Magnetic manganese ferrites are a proven recyclable adsorption material on account of their excellent ferromagnetism. In this study, manganese ferrites adsorbent synthesized from ferromanganese ore were used for Pb(II) removal from acid wastewater. Thermodynamic calculation and adsorption tests were conducted. Under optimal conditions, the removal ratio of Pb(II) reached 99.4% when initial Pb(II) concentration was 10 mg/L (pH=5), and the residual Pb(II) concentration was reduced to lower than 0.1 mg/L. The results indicated that the synthetic manganese ferrites were an excellent magnetic adsorbent, which was easy to be separated and recycled. The adsorption mechanism was explored by isothermal adsorption analysis using φ-pH and ICP.
10:50 AM Cancelled
Recovery of Valuable Metals from the Leaching Tailings from the Arsenic-Nickel/Cobalt-residue: Jinxi Qiao1; Ailiang Chen1; Xintao Sun1; Zhen Qian2; Yan Zhang3; Yutian Ma3; Yalin Ma1; 1Central South University; 2Changsha Research Institute of Mining Metallurgy Co.Ltd; 3State Key Laboratory of Nickel and Cobalt Resources Comprehensive Utilization;Jinchuan Group Co. Ltd
The leaching residue after extracting arsenic from the arsenic- nickel/cobalt-residue is treated to recover copper, cobalt and nickel and so on. The experimental results show that the best conditions are as follows: the time is 2 hours, the liquid-solid-ratio is 10:1, the ratio of oxidant to raw material is 0.6 ml/g, the sulfuric acid concentration is 20% and the temperature is 40 °C. Under the above conditions, the leaching ratio of copper, cobalt, nickel, zinc and arsenic are 96.31%, 97.23%, 98.56%, 98.46%, 93.84%, respectively. The leaching kinetics of copper, cobalt and nickel were further studied. The activation energy of copper, cobalt, nickel leaching reaction are 47.22kJ/mol, 37.91 kJ/mol, 44.93 kJ/mol, respectively; and the reaction grade are 1.88, 1.94, 1.92, respectively. In this study, the valuable metals are further recovered in the leaching residue. It is beneficial to the efficient use of resources, reducing resources waste in the metallurgical process.