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Advances in Tin Smelting in Yunnan Tin Corporation, China.

PB89112437

Publication Date	1987
Personal Author	Rong, X. M.; Huang, W. S.; Wang, K. D.
Page Count	15
Abstract	Progress in tin smelting and process technology at the smelter of the Yunnan Tin Corporation is described together with practical experience in reverberatory furnace treatment of medium-grade concentrates. By introducing a fuming process for treating rich slag in place of a blast-furnace process the separation of tin from iron has been solved. Thus, the two-stage smelting has been changed to a one-stage smelting and fuming scheme. Since the 1960s the lower-grade concentrates have been treated directly in a fuming furnace to make concentrate (both Sn and Pb) in a fume dust. The tin content in the waste slag is acceptably low. The chloridizing volatilization process is being investigated for treatment of the poor tin content middlings produced in the concentrators. The treatment of the lower tin content materials can reasonably be dealt with by using chloridizing volatilization and sulphidizing volatilization, thus making up for the economic loss, which has resulted from the decrease of tin content in the feed to the concentrators and so resulting in improving the utilization of tin resources. The overall recovery of tin is maintained steady at about 97% by a series of complex processes. The practice for recovering white arsenic by means of a distillation process is also reported.
Keywords	Tin Smelting Materials recovery Smelters China Reverberatory furnaces Slags Separation Fumes Concentrates Concentrators Foreign technology Yunnan Tin Corporation Chloride volatility process
Source Agency	Foreign Technology-Institute of Scientific and Technical Information of China
NTIS Subject Category	71N - Nonferrous Metals & Alloys
Corporate Authors	Yunnan Tin Corp., Gejiu (China).; Institute of Scientific and Technical Information of China, Beijing.
Supplemental Notes	Sponsored by Institute of Scientific and Technical Information of China, Beijing.
Document Type	Technical Report
Title Note	Technical rept.,
NTIS Issue Number	198903

Advances in Tin Smelting in Yunnan Tin Corporation, China.

Advances in Tin Smelting in Yunnan Tin Corporation, China.
PB89112437

Publication Date	1987
Personal Author	Rong, X. M.; Huang, W. S.; Wang, K. D.
Page Count	15
Abstract	Progress in tin smelting and process technology at the smelter of the Yunnan Tin Corporation is described together with practical experience in reverberatory furnace treatment of medium-grade concentrates. By introducing a fuming process for treating rich slag in place of a blast-furnace process the separation of tin from iron has been solved. Thus, the two-stage smelting has been changed to a one-stage smelting and fuming scheme. Since the 1960s the lower-grade concentrates have been treated directly in a fuming furnace to make concentrate (both Sn and Pb) in a fume dust. The tin content in the waste slag is acceptably low. The chloridizing volatilization process is being investigated for treatment of the poor tin content middlings produced in the concentrators. The treatment of the lower tin content materials can reasonably be dealt with by using chloridizing volatilization and sulphidizing volatilization, thus making up for the economic loss, which has resulted from the decrease of tin content in the feed to the concentrators and so resulting in improving the utilization of tin resources. The overall recovery of tin is maintained steady at about 97% by a series of complex processes. The practice for recovering white arsenic by means of a distillation process is also reported.
Keywords	Tin Smelting Materials recovery Smelters China Reverberatory furnaces Slags Separation Fumes Concentrates Concentrators Foreign technology Yunnan Tin Corporation Chloride volatility process
Source Agency	Foreign Technology-Institute of Scientific and Technical Information of China
NTIS Subject Category	71N - Nonferrous Metals & Alloys
Corporate Authors	Yunnan Tin Corp., Gejiu (China).; Institute of Scientific and Technical Information of China, Beijing.
Supplemental Notes	Sponsored by Institute of Scientific and Technical Information of China, Beijing.
Document Type	Technical Report
Title Note	Technical rept.,
NTIS Issue Number	198903