Jinrong Ju

Bio: Jinrong Ju is an academic researcher from University of Science and Technology Beijing. The author has contributed to research in topics: Leaching (metallurgy) & Raffinate. The author has an hindex of 1, co-authored 3 publications receiving 3 citations. Previous affiliations of Jinrong Ju include Chinese Academy of Sciences.

An eco-friendly approach for NaCl recovery from organic pollutants-containing waste salt by roasting together with low-grade pyrolusite

Abstract: A large amount of organic pollutants-containing waste salt is produced in chemical production process, which is usually filled or deposited without treatment, causing serious environmental pollution and a waste of salt resource. In this work, in order to reduce the emission of toxic and harmful gasses and make full use of the organic matter component in waste salt, pyrolusite was used as an absorbent in the process of high-temperature pyrolysis of waste salt, of which MnO 2 was reduced to MnO while absorbing harmful gasses. The dual effects of roasting to remove organic pollutants from the waste salt and increase manganese leaching efficiency were systematically investigated, and the roasting mechanism and process were explored. Co-recovery of NaCl from organic pollutants-containing waste salt and manganese from pyrolusite ore was achieved. The results indicated that the optimum the removal efficiency of organic matter in the waste salt could be reached 99.45%, the purity of recovered NaCl products was 99.83% and leaching efficiency of 99.62% for manganese under the mass ratio of waste salt to pyrolusite of 8:5, the co-roasting temperature of 650 °C, and the roasting time of 40 min.

Catalytic Pyrolysis of Wheat Bran for Hydrocarbons Production in the Presence of Zeolites and Noble-Metals by Using TGA-FTIR Method

Abstract: Pyrolysis of wheat bran with or without catalysts was investigated using TGA-FTIR method in order to determine the influence of zeolite and noble metal catalysts on the evolution profile and relative yield of the volatile compounds. The addition of all catalysts decreased the volatile matter of wheat bran from 76.3% to 75.9%, 73.9%, 73.5%, 69.7% and increased the solid residue from 18.0% to 18.4%, 20.4%, 20.8%, 24.6% under the catalyst of ZSM-5, 5% Pd/C, MCM-41, and 5% Pt/C. Noble-metal catalysts had higher activity for deoxygenation of compounds containing carbonyl, carboxyl, and hydroxyl groups than zeolites. Degradation of nitrogen containing compounds atom proceeded better in presence of zeolites. Noble-metal catalysts promoted formation of aromatics and changed the profiles of evolved compounds whereas zeolites advanced formation of aliphatics and olefins.

An eco-friendly approach for NaCl recovery from organic pollutants-containing waste salt by roasting together with low-grade pyrolusite

Abstract: A large amount of organic pollutants-containing waste salt is produced in chemical production process, which is usually filled or deposited without treatment, causing serious environmental pollution and a waste of salt resource. In this work, in order to reduce the emission of toxic and harmful gasses and make full use of the organic matter component in waste salt, pyrolusite was used as an absorbent in the process of high-temperature pyrolysis of waste salt, of which MnO 2 was reduced to MnO while absorbing harmful gasses. The dual effects of roasting to remove organic pollutants from the waste salt and increase manganese leaching efficiency were systematically investigated, and the roasting mechanism and process were explored. Co-recovery of NaCl from organic pollutants-containing waste salt and manganese from pyrolusite ore was achieved. The results indicated that the optimum the removal efficiency of organic matter in the waste salt could be reached 99.45%, the purity of recovered NaCl products was 99.83% and leaching efficiency of 99.62% for manganese under the mass ratio of waste salt to pyrolusite of 8:5, the co-roasting temperature of 650 °C, and the roasting time of 40 min.

Resource utilization of slag from desulphurization and slag skimming: A comprehensive recycling process of all components

Abstract: In order to make the slag from desulphurization and slag skimming (SDSS) to be comprehensively recycled and utilized, a combined process of beneficiation and building materials preparation was proposed to recover iron from SDSS, meanwhile to apply the remaining slag tailings as cement admixture. From this process, three iron-rich products were recovered in stages by clean gravity - magnetic separation, slag tailings were left. Slag powder was prepared by ultrafine grinding of slag tailings. The stability, setting time and cement mortar strength of the slag tailings cements (STC) which were mixed with Portland cement and slag powder were studied respectively. The results showed that a proper overall performance still could be obtained at the slag powder content of 30%. Chemical composition analysis, X-ray diffraction (XRD) analysis, metallographic microscope and scanning electron microscope (SEM) analysis were employed to assess the characteristics of the SDSS and the products obtained from the whole process. The results indicated that the three iron-rich products could be used as a raw material for steelmaking and ironmaking and the relatively large amount of calcium silicate (C2S) and tricalcium silicate (C3S) in the slag tailings make the addition of slag powder into the Portland cement feasible.