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

A method for oxidizing and decomposing nickel-molybdenum ore

An oxidative decomposition, nickel-molybdenum ore technology, applied in the field of metallurgy, can solve the problems of difficult acid production, environmental pollution, low production capacity, etc., achieve good economic and social benefits, solve environmental pollution, and reduce production costs.

Active Publication Date: 2016-06-08
贵州华桂钼镍有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] b. Rotary kiln is to use rotary cylinder equipment to carry out mechanical, physical or chemical treatment of solid materials. It is widely used in many production industries such as building materials, metallurgy, chemical industry, environmental protection, etc. The rotary kiln has a single structure, easy operation, and adaptability of raw materials. Wide and other advantages, its disadvantages are: low production capacity, large fuel consumption, low thermal efficiency, and flue gas has a great impact on product quality
Sulfur dioxide in its production process seriously pollutes the environment
Similarly, the concentration of sulfur dioxide is low (about 0.5%), making it difficult to make acid

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

Embodiment 1

[0026] Take 100kg of nickel-molybdenum ore and 300kg of sulfur-containing minerals and mix them. After testing, the weight content of S in the mixed material is 26%, and the weight content of water is 10%. Air with an oxygen content of 30% (volume ratio) is roasted together for 0.25 hours. During roasting, the temperature of the boiling layer in the fluidized furnace is 750°C, the pressure at the bottom of the fluidized furnace is 1000mmHg, and the outlet temperature of the fluidized furnace is 500°C. The calcined sand containing 2.5% S and the furnace gas containing 8% sulfur dioxide are obtained. Among them, the obtained furnace gas can adopt the existing contact method, and can directly prepare industrial sulfuric acid that meets the national standard, and the tail gas discharged after the acid production is in line with the national comprehensive emission standard for environmental protection, and will not pollute the atmospheric environment; the obtained calcined sand can ...

Embodiment 2

[0028] Get 100kg of nickel-molybdenum ore and 10kg of sulfur to mix. After testing, the weight content of S in the mixed material is 27%, and the weight content of water is 8%. Air with an oxygen content of 20% (volume ratio) is roasted together for 0.5 hours. During roasting, the temperature of the boiling layer in the fluidized furnace is 600°C, the pressure at the bottom of the fluidized furnace is 1300mmHg, and the outlet temperature of the fluidized furnace is 450°C. The calcined sand containing 3% S and the furnace gas containing 9% sulfur dioxide are obtained. Among them, the obtained furnace gas can adopt the existing contact method, and can directly prepare industrial sulfuric acid that meets the national standard, and the tail gas discharged after the acid production is in line with the national comprehensive emission standard for environmental protection, and will not pollute the atmospheric environment; the obtained calcined sand can be used for Production of molyb...

Embodiment 3

[0030] After getting 100kg of nickel-molybdenum ore to mix, after testing, the weight content of S in the material is 22%, the weight content of water is 5%, then this mixed material is placed in the fluidized furnace for boiling roasting, and in the fluidized furnace, feed oxygen content of 40% (volume ratio) air is roasted together for 0.3 hours. During roasting, the temperature of the boiling layer in the fluidized furnace is 900°C, the pressure at the bottom of the fluidized furnace is 900mmHg, and the outlet temperature of the fluidized furnace is 660°C. The calcined sand containing 2.8% of S and the furnace gas containing 5.8% of sulfur dioxide are obtained. Among them, the obtained furnace gas can adopt the existing contact method, and can directly prepare industrial sulfuric acid that meets the national standard, and the tail gas discharged after the acid production is in line with the national comprehensive emission standard for environmental protection, and will not p...

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 an oxidative decomposition method of nickel-molybdenum ores, belonging to the technical field of metallurgy. The preparation method comprises the following steps: mixing nickel-molybdenum ores and a sulfur-containing material, wherein the weight percent of S in the mixture is 22-30%, and the weight content of water is 5-15%; and putting the mixture in a fluidized bed furnace, and roasting while introducing air or oxygen-rich gas, wherein the oxygen-rich gas is air in which the oxygen content is 20-40%. The nickel-molybdenum ores or with other materials are added into the fluidized bed furnace to perform oxidative decomposition, thereby producing furnace gas and a roasted product which can be directly recycled.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for oxidizing and decomposing nickel-molybdenum ore. Background technique [0002] Boiling roasting is a thermal equipment using fluidization technology. It has fast heat and mass exchange speed between gas and solid, uniform temperature in the furnace, good product quality, and large heat transfer coefficient between the boiling furnace and the cooling (or heating) wall. High production efficiency, simple operation, easy to realize a series of advantages such as continuous production and automation, so it has been widely used. Oxidation roasting and sulfate roasting of zinc concentrate and copper concentrate, sulfate roasting of cobalt-containing pyrite concentrate, oxidation roasting of tin concentrate, chlorination roasting of high titanium slag, semi-desulfurization roasting of copper-nickel ore, mercury ore Fluidized fluidized furnaces have been used...

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 Patents(China)
IPC IPC(8): C22B1/10C22B23/00C22B34/34
Inventor 陈庭章谢轶丞谢伦
Owner 贵州华桂钼镍有限公司
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