A method for reducing lead and maintaining rhenium in a high-lead rhenium-containing molybdenum concentrate

A molybdenum concentrate and high-lead technology is applied in the field of lead reduction and rhenium protection of high-lead rhenium-containing molybdenum concentrates, which can solve the problems of no high-lead-containing rhenium molybdenum concentrates and lead reduction and protection of rhenium, so as to reduce equipment investment and parameters. Easy to control, easy to malfunction effect

Inactive Publication Date: 2011-12-14
西部鑫兴金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the problem in the prior art that there is no method for reducing lead and maintaining rhenium on high-lead-containing rhenium-containing molybdenum conc...

Method used

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  • A method for reducing lead and maintaining rhenium in a high-lead rhenium-containing molybdenum concentrate
  • A method for reducing lead and maintaining rhenium in a high-lead rhenium-containing molybdenum concentrate
  • A method for reducing lead and maintaining rhenium in a high-lead rhenium-containing molybdenum concentrate

Examples

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Effect test

Embodiment 1

[0025] Measure 200mL of concentrated hydrochloric acid and 1800mL of industrial pure water with a concentration of 36wt%, put them into a reactor with a heating mantle and a stirring device, stir and mix evenly at room temperature to obtain a hydrochloric acid solution;

[0026] Add 82g of calcium chloride solid to the hydrochloric acid solution, and dissolve completely under stirring at room temperature to obtain a mixed solution;

[0027] The mixed solution was heated to 90°C under stirring, and 980g of high-lead rhenium-molybdenum concentrate powder was added to obtain a solid-liquid mixture 1;

[0028] Insulate the solid-liquid mixture 1 at 90°C for 90 minutes with sufficient stirring to obtain a solid-liquid mixture 2;

[0029] Filter the solid-liquid mixture 2, and wash the filtered solid with hot water at 80°C for 3 times to obtain a filter cake;

[0030] Dry the filter cake at 150°C until the moisture in the filter cake drops to 1.0g / cm 3 , the pretreated molybdenum ...

Embodiment 2

[0034] Measure 200 mL of concentrated hydrochloric acid and 980 mL of industrial pure water with a concentration of 36 wt%, put them into a reactor with a heating mantle and a stirring device, stir and mix evenly at room temperature to obtain a hydrochloric acid solution;

[0035] Add 30g of calcium chloride solid to the hydrochloric acid solution, and dissolve completely under stirring at room temperature to obtain a mixed solution;

[0036] The mixed solution was heated to 95°C under stirring, and 295g of high-lead rhenium-molybdenum concentrate powder was added to obtain a solid-liquid mixture 1;

[0037] Insulate the solid-liquid mixture 1 at 95°C for 60 minutes with sufficient stirring to obtain a solid-liquid mixture 2;

[0038] Filter the solid-liquid mixture 2, and wash the filtered solid with hot water at 90°C for 4 times to obtain a filter cake;

[0039] Dry the filter cake at 120°C until the moisture in the filter cake drops to 0.8g / cm 3 , to prepare the pretreate...

Embodiment 3

[0043] Measure 200mL of 36wt% concentrated hydrochloric acid and 1000mL of industrial pure water, put them into a reactor with a heating mantle and a stirring device, stir and mix evenly at room temperature to obtain a hydrochloric acid solution;

[0044] Add 28g of calcium chloride solid to the hydrochloric acid solution, and dissolve completely under stirring at room temperature to obtain a mixed solution;

[0045] The mixed solution was heated to 100°C under stirring, and 250g of high-lead rhenium-molybdenum concentrate powder was added to obtain a solid-liquid mixture 1;

[0046] Insulate the solid-liquid mixture 1 at 100°C for 40 minutes with sufficient stirring to obtain a solid-liquid mixture 2;

[0047] Filter the solid-liquid mixture 2, and wash the filtered solid with hot water at 100°C for 5 times to obtain a filter cake;

[0048] Dry the filter cake at 110°C until the moisture in the filter cake drops to 0.9g / cm 3 , to prepare the pretreated molybdenum concentrat...

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Abstract

The invention discloses a method for reducing lead and protecting rhenium for high-lead rhenium and molybdenum containing concentrate and belongs to the field of rare metal smelting. The method comprises: dissolving a calcium chloride solid in solution of hydrochloric acid, and adding high-lead rhenium and molybdenum containing concentrate powder under a heating condition; and stirring, keeping the temperature, washing the obtained solid and liquid mixture, and drying to obtain a pretreated molybdenum concentrate sample. The method has low cost and high process repeatability. The loss of molybdenum and rhenium in the molybdenum concentrate pretreated by the method is small (the molybdenum content in waste solution is less than or equal to 0.01g/L, and the rhenium content in the waste solution is less than or equal to 0.0001g/L), the molybdenum and rhenium are enriched to a certain degree; the percentage content of other alkali metals (such as Cu and Fe) is reduced to different extents; particularly the percentage content of the pretreated lead is less than or equal to 0.03 percent; and thus, the quality of the molybdenum concentrate is improved obviously.

Description

technical field [0001] The invention relates to a method for reducing lead and preserving rhenium of molybdenum concentrate containing high lead and rhenium, in particular to a pretreatment method for molybdenum concentrate containing high lead content and precious metal rhenium, belonging to the field of rare metal smelting. Background technique [0002] Most of the raw materials for molybdenum metallurgy in my country are molybdenite (MoS 2 ). According to the formation conditions of molybdenite deposits, it is associated with most metal deposits (such as galena, etc.). The traditional metallurgical process is to obtain molybdenum concentrate by flotation and enrichment of molybdenite, and then obtain industrial molybdenum oxide by direct oxidation and roasting. The large amount of associated metal (Cu, Pb, etc.) impurities contained in molybdenum concentrate not only affect the grade of industrial molybdenum oxide obtained after oxidation roasting, but also bring many i...

Claims

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Application Information

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IPC IPC(8): C22B1/00C22B34/34
Inventor 冯宝奇白宏斌马高峰王子川郭金亮王伟薛丽英谢亚宁董永
Owner 西部鑫兴金属材料有限公司
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