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Electric furnace production of yellow phosphorus electric flue dust scattered elements gallium extraction

Author: WangShengJun
Tutor: MeiYi
School: Kunming University of Science and Technology
Course: Chemical Engineering
Keywords: Yellow phosphorus Gallium Electric flue dust Extraction Back-extraction
CLC: TQ126.317
Type: Master's thesis
Year: 2009
Downloads: 43
Quote: 0
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Abstract


Is an important scattered elements gallium , is widely used in the electronics industry and the nuclear power industry , with the rapid development of China 's science and technology , the role of gallium in the national economy is also growing . Yellow phosphorus is the national economy, an integral part of basic chemical raw materials , and in the process of production of phosphorus by electric furnace process to produce large amounts of yellow phosphorus slag , electric flue dust . , Yellow phosphorus slag and electric dust of the resources is an important topic in the environmental protection of the yellow phosphorus industry . Gallium extraction and production of yellow phosphorus electric flue dust from the electric furnace process for the full and efficient use of limited resources to improve the competitiveness of yellow phosphorus industry has important practical significance . In this thesis, given this situation, the study of from yellow phosphorus electricity flue dust gallium extraction process route and process conditions . This paper proposes a new method gallium extraction system from electric flue dust : Pretreatment - preparation Crafts dope - extraction and back-extraction . By single factor experiment and orthogonal experiment to obtain optimum conditions . This paper focuses on the extraction and back-extraction experiments . Material balance , electric flue dust, the main elements of the mass balance through the whole process of amplification experiments . The innovation of this paper are : 1 . Pretreatment section : In the published literature , leaching yellow phosphorus electric flue dust, gallium, the amount of sulfuric acid (50g sulfuric acid / 50g electric dust ) or more . The paper by optimizing the process conditions , under the premise of gallium leaching rate is higher (93%) , the decrease in the amount of sulfuric acid (45g sulfuric acid / 50g electric dust ) . Dope section 2 . Preparation and Crafts : yellow phosphorus electric flue dust leaching solution as raw material , an unreported combination process : the the phosphate precipitate - dissolved in hydrochloric acid - restore Fe3 prepared suitable for TBP extraction system and Crafts dope . 3 . Extraction and back extraction section : TBP extractant extraction experiments appeared third interfere . To resolve this problem , a formulation of an unreported extracted organic phase , not only the success of the elimination of the third phase , the extraction rate of Ga and reached more than 95% .

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CLC: > Industrial Technology > Chemical Industry > Non-metallic elements and their inorganic compounds, the chemical industry > Section Ⅴ family of non-metallic element and its inorganic compounds > Phosphorus and its inorganic compounds > Phosphorus > Yellow phosphorus,red phosphorus
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