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국산 신문지고지로 부터 고품질 재생펄프의 제조가능성에 관한 연구
안세희,오세균 大邱大學校出版部 (대구대학, 한사대학 1992 農業科學硏究論文集 Vol.6 No.-
In order to facilitate deinking and to obtain an improved brightness of the deinked stock, soaking tower systems was performed on korean old newspaper. In soaking system, alkaline hydrogen peoxide as a bleaching chemical was used. The test results with soaking tower systems showed a sharp increase in deinkability. This good deinkability mainly depended on soaking time and deinking chemicals. In soaking system, good brightness response on KONP was obtained with up to 1% peroxide applied, however, increasing the application level further gave only incremental improvement. Soaking time must be longer than 4 hours to obtain the sufficient effect, and 8 hours of soaking is of no practical value.
윤병태,오세균 한국펄프종이공학회 1999 펄프.종이기술 Vol.31 No.2
This study was carried out to compare a conventional alkaline flotation deinking conditions with neutral deinking conditions with and without enzyme addition with respect to the ink removal efficiency and theflotation deinking filtrate quality such as chemical oxygen demand, cationic demand, suspended solids. Based on ink removal rate the neutral deinking condition without enzyme was better than the alkaline deinking condition, and the neutral deinking with enzyme addition turned out to be the best. The brightness of the deinked pulp was found to be the same trend as the ink removal rate. Flotation reject rate for the neutral deinking condition without enzyme was higher than that of the alkaline deinking condition, but that of the neutral deinking condition with enzyme was lower than that of the alkaline and the neutral deinking condition without enzyme. On the freeness of the deinked pulp, the neutral deinking condition with enzyme had the highest value and the alkaline deinking condition had the lowest value among the conditions tested. On the filtrate of the flotation stage, the cationic polymer demand of the neutral deinking condition with enzyme was much lower than the other conditions. Suspended solids and chemical exygen demand for the neutral flotation deinking filtrate was lower than those of the alkaline flotation deinking filtrate.
윤병태,오세균 한국펄프종이공학회 1999 펄프.종이기술 Vol.31 No.2
A new test method has been developed for a quantitative evaluation of macro-stickies in recycled pulps. The method uses a fine slot screen to separate a sticky particles form fiber in the pulp samples. The obtained sticky particles were spread on filter paper and covered with silicon carbide powder in order to make the stickies area with sufficient contrast between stickies and background. The stickies are then counted by a scanner-based image analysis system. The validity of this evaluation method of stickies of KOCC, ONP and white ledger wastepaper recycling plants respectively. It is shown that this method can be applied for a quantitative determination of stickies content in various recycled pulp samples. With this testing method, reproducible and reliable data were obtained for the actual mill pulp samples.
충전물의 Coagulation이 탈수 및 건조효율에 미치는 영향
윤병태,오세균,전양,Yoon, byoung-Tae,Ow, Say-Kyoun,Jeon, Yang 한국펄프종이공학회 1998 펄프.종이기술 Vol.30 No.2
This study was aimed to investigate any improvement of dewatering and energy saving on the papermaking process when the various types of fillers were used, i.e., clay, talc and grounded calcium carbonate (GCC). Cationic polyelectrolyte and alum coagulants neutralized the surface charge of the filler particles and the filler particles were coagulated. The rates of dewatering and drying were investigated. The results indicated that clay tended to intense anion, while talc and GCC tended to anion trend nearly to neutrality. Clay and talc added with EPI-DMA, P-DADMAC and alum respectively as optimum levels showed a significant efficiency on the dewatering and the turbidity dissipation. However, the turbidity and dewatering rate of GCC decreased, when GCC was added with EPI-DMA and P-DADMAC respectively Drying rate of clay was increased when coagulant added. However drying rates of talc and GCC were not affected by coagulant, while the apprarent drying time of talc and GCC in the absence of any coagulant was shorter than the clay in the presence of a coagulant. The result confirmed that talc or GCC was more efficient than clay on the dewatering and drying, which is consistent with a general knowledge in the collodal science.