Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for separating molybdenum and nickel in molybdenum- and nickel-containing black shale

A black shale and separation method technology, applied in the field of metallurgy and chemical industry, can solve the problems of large amount of flue gas, high cost, and large consumption of reagents, and achieve the effects of avoiding pollution, process strengthening, and smelting process simplification

Inactive Publication Date: 2009-07-15
KUNMING UNIV OF SCI & TECH
View PDF2 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The total recovery rate of molybdenum and nickel of this inventive method is respectively 90%, 94%, but process operation is complicated, and reagent consumption is big, and cost is higher
[0008] The above-mentioned treatment method for molybdenum-nickel symbiotic ore has a method of oxidation roasting or salt roasting process, SO 2 The environmental pollution is serious, and a large amount of smoke is produced during the roasting process, which seriously pollutes the environment
The roasting reaction of the salt-added roasting method is basically a chemical reaction on the solid-solid surface, and because the molybdenum-nickel-containing black carbonaceous shale contains low molybdenum-nickel content and high iron-sulfur content (the molybdenum content is 2-6%, Nickel content is 2.5-3%, iron content is 3-18%, sulfur content is 5-23%), the amount of salt added is limited, and because the behavior of molybdenum-nickel minerals is complex, this fundamentally limits the reaction speed and Conversion rate; with direct leaching method, the leaching conversion rate is low and the system is complex
Therefore, the disadvantages of the above method are that the technical process is complex, the metal recovery rate is low, the valuable metal is dispersed, the reagent consumption is large, the cost is high, the benefit is poor, it is difficult to overcome the complexity of the mineral, the separation of molybdenum and nickel in the mineral is difficult, and the environmental pollution is serious.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] 1. Raw material: molybdenum content is 6.32%, nickel content is 3.05%, iron content is 8.27%, sulfur content is 21.58%, broken and crushed to 200 mesh (≥90%).

[0026] 2. One-stage oxygen pressure alkali leaching: add industrial soda ash with a mass percentage concentration of 50% and caustic soda with a mass percentage concentration of 10% for pulping, control the solid-liquid mass-volume ratio of 1:4, and pump it into the In the autoclave, industrial oxygen was introduced, the conversion temperature was controlled at 150° C., and the leaching reaction was carried out for 180 minutes under the condition of the pressure in the autoclave of 1.6 MPa. A section of molybdenum-containing leaching solution and a section of nickel-containing leaching residue are obtained by filtering, and a section of molybdenum-containing leaching solution is treated with molybdenum precipitation to obtain ammonium molybdate.

[0027] Molybdenum leaching rate: 90.37% Ammonium molybdate recovery...

example 2

[0032] 1. Raw material: molybdenum content is 5.92%, nickel content is 3.17%, iron content is 15.69%, sulfur content is 13.88%, broken and crushed to 200 mesh (≥90%).

[0033] 2. One-stage oxygen pressure alkali leaching: add industrial soda ash with a mass percentage concentration of 40% and caustic soda with a mass percentage concentration of 20% for pulping, control the solid-liquid mass volume ratio of 1:3, and pump it into the In the autoclave, industrial oxygen was introduced, the conversion temperature was controlled at 220° C., and the leaching reaction was carried out for 90 minutes under the condition of the inner pressure of the autoclave at 3.5 MPa. A section of molybdenum-containing leaching solution and a section of nickel-containing leaching residue are obtained by filtering, and a section of molybdenum-containing leaching solution is treated with molybdenum precipitation to obtain ammonium molybdate.

[0034] Molybdenum leaching rate: 94.25% Ammonium molybdate ...

example 3

[0039] 1. Raw materials: molybdenum content is 4.58%, nickel content is 2.79%, iron content is 17.37%, sulfur content is 23.0%, broken and crushed to 200 mesh (≥90%).

[0040] 2. One-stage oxygen pressure alkali leaching: add industrial soda ash with a mass percentage concentration of 30% and caustic soda with a mass percentage concentration of 20% for pulping, control the solid-liquid mass volume ratio of 1:2, and pump it into the In the autoclave, anhydrous air was passed through, the conversion temperature was controlled at 100° C., and the leaching reaction was carried out for 120 minutes under the condition of the pressure in the autoclave of 0.8 MPa. A section of molybdenum-containing leaching solution and a section of nickel-containing leaching residue are obtained by filtering, and a section of molybdenum-containing leaching solution is treated with molybdenum precipitation to obtain ammonium molybdate.

[0041] Molybdenum leaching rate: 75.17% Ammonium molybdate recov...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for separating molybdenum and nickel in black shale containing molybdenum and nickel, and belongs to the technical field of chemical metallurgy. The process of the method comprises the following steps: firstly, crushing and grinding the black shale containing molybdenum and nickel; size mixing by adding alkali materials; carrying out the process of oxygen pressure alkali leaching in a pressure kettle; filtering to obtain molybdenum-containing leaching solution and nickel-containing leaching residue; carrying out the molybdenum precipitation treatment on the one-stage molybdenum-containing leaching solution to obtain ammonium molybdate; then, size-mixing the one-stage leaching residue in the presence of sulfuric acid; carrying out the process of two-stage oxygen pressure acid leaching in the pressure kettle; filtering to obtain nickel leaching solution and two-stage leaching residue; and subjecting the two-stage nickel-containing leaching solution to iron purification and evaporating concentration to obtain nickel sulfate. The invention gets rid of the procedure of calcination, thereby preventing flue gases, such as SO2 and the like, from causing environmental pollution; the process of two-stage oxygen pressure leaching is favorable for the generation of ammonium molybdate and nickel sulfate from molybdenum and nickel respectively so as to enter different solutions for enrichment; molybdenum and nickel can be better separated and recovered; and the qualified tailings can be obtained. The method belongs to the clean production technology for intensifying the conversion, and the main process is free from the variation of the mineral composition.

Description

technical field [0001] The invention relates to a method for separating molybdenum and nickel in black shale containing molybdenum and nickel, belonging to the technical field of metallurgy and chemical industry. Background technique [0002] There is a kind of black shale in the early ancient strata in western Zhejiang, southern Anhui, Jiangxi, Hunan, western Hubei, southwestern Henan, southern Shaanxi, and northeastern Guizhou, commonly known as "stone coal". "Stone coal" is essentially A carbonaceous shale that is not classified as coal. Black carbonaceous shale contains little organic matter, low calorific value, high ash yield (much higher than 40%), and contains valuable metal elements such as vanadium, molybdenum, nickel, phosphorus, copper, sulfur, iron, and uranium Therefore, black carbonaceous shale is essentially a complex polymetallic mineral containing various metal elements. Black carbonaceous shale is formed in ancient strata such as Sinian mining, Hankai sy...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/04C22B3/12C22B3/08C22B3/22C22B23/00C22B34/34
CPCY02P10/20
Inventor 魏昶樊刚邓志敢李存兄
Owner KUNMING UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com