Unlock instant, AI-driven research and patent intelligence for your innovation.

Separating and purifying method for metal oxidized ore

A technology for separating, purifying, and oxidizing ore, which is applied in the field of ore separation and purification, can solve the problems of inability to achieve high efficiency, unavailability of sulfur dioxide gas, and high energy consumption, and achieve significant economic and environmental benefits.

Active Publication Date: 2015-03-25
上海国惠环境科技股份有限公司
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process method has the following disadvantages: 1) Send sulfur dioxide gas and oxygen into the pre-prepared pyrolusite slurry for reaction. In fact, this process needs to pressurize the sulfur dioxide gas to a relatively high pressure (above 5000Pa) to enter the slurry smoothly , the energy consumption is large; 2) In the actual reaction process, sulfur dioxide gas needs to be dissolved into the slurry in the form of bubbling first, and then react with the minerals in the slurry, but because the solubility of sulfur dioxide in water is not high, therefore, the reaction starts from Fundamentally limited by the mass transfer of sulfur dioxide, the reaction cannot be carried out efficiently; 3) Just like hydrometallurgy, this method also has high requirements on the corrosion resistance of the equipment; 4) Especially this method requires the use of high concentrations of sulfur dioxide Gas, low concentration of sulfur dioxide gas can not be used
[0008] In summary, although the existing technology of leaching metal oxide ores by using sulfur dioxide can effectively leach minerals, it is unsatisfactory due to the shortcomings of low efficiency, corrosion, and secondary pollution.

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

[0036] Formulated with SO 2 The gas with a concentration of 10% (v / v), the balance gas is air, first adjust the temperature of the gas to 150°C, p / p 0 Adjust to 0.05; crush the red zinc ore (containing 12.0wt% zinc, 4wt% manganese) and pass through a 50-mesh sieve; 2 Gas input and put in 100g of the above-mentioned ore particles, keep the rising gas velocity in the reactor not lower than 6m / s, the ore particles after the reaction saturation are sent to the countercurrent rinsing tank, and the undissolved ore powder can be dried after drying at 80°C. Enter the fluidized bed reactor for reaction; countercurrent gradient elution can obtain high-concentration zinc sulfate and manganese sulfate solutions, and chemical extraction or electrochemical separation can obtain zinc and manganese compounds respectively.

Embodiment 2

[0038] Use SO 2 For industrial sulfur dioxide waste gas with a concentration of 2% (v / v), first adjust the temperature of the gas to 80°C, p / p 0 adjusted to 0.10; crush pyrolusite ore (containing 16.0wt% manganese, 0.5wt% iron, and 0.8wt% aluminum) and pass through a 100-mesh sieve; the adjusted 2% SO 2 Gas input and put in 200g of the above-mentioned ore particles, keep the rising gas velocity in the reactor not lower than 4m / s, the ore particles after the reaction saturation are sent to the countercurrent rinsing tank, and the undissolved ore powder can be dried after drying at 80°C. Enter the fluidized bed reactor for reaction; countercurrent gradient elution can obtain high-concentration manganese sulfate, ferrous sulfate and aluminum sulfate solutions, and chemical extraction or electrochemical separation can obtain manganese, iron and aluminum compounds respectively.

Embodiment 3

[0040] Formulated with SO 2 The gas concentration is 40% (v / v), the balance gas is air, the temperature of the gas is adjusted to 50°C, and the p / p0 is adjusted to 0.80; Mesh sieve; use the adjusted 40% SO in the fluidized bed reactor 2 Gas input and put in 150g of the above-mentioned ore particles, keep the rising gas velocity in the reactor not less than 3m / s, the ore particles after the reaction saturation are sent to the countercurrent rinsing tank, and the undissolved ore powder can be dried after drying at 80°C. Enter the fluidized bed reactor for reaction; countercurrent gradient elution can obtain high-concentration copper sulfate, and chemical extraction or electrochemical separation can obtain copper compounds respectively.

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to View More

Abstract

A separating and purifying method for metal oxidized ore relates to the technical field of chemical purification, and is characterized in that SO2 in gas is enabled to respectively carry out oxidation-reduction reaction with metal oxide on mineral particles directly to generate metal sulfate, and carry out catalytic oxidation reaction triggered by metal oxide surfaces on the particles to transfer to sulfuric anhydride and further carry out hydration reaction with water on the surfaces of the particles directly to produce sulfuric acid, and finally, sulfuric acid is used for resolving metal compound in mineral to generate metal sulfate; and further, water washing is performed, namely, the solution of metal sulfate is prepared, and different metallic compounds can be obtained through separation and purification. According to the invention, sulfur dioxide is enabled to carry out efficient leaching on metal oxidized ore, and meanwhile, the method has the advantages of less waste water and waste residue, mild reaction conditions and the like.

Description

technical field [0001] The present invention relates to a metal oxide ore dressing and smelting method, specifically a method using sulfur dioxide (SO 2 ) or a method in which sulfur dioxide-containing gas reacts directly with metal oxide ores to achieve separation and purification of ores. Background technique [0002] There are many symbiotic (associated) ores with complex mineral resources in my country, among which more than 80 symbiotic (associated) ores of non-ferrous metals are the most common, which greatly increases the technical difficulty of development and utilization. For example, there are more than 50 kinds of associated components in lead-zinc mines, and the silver in lead-zinc mines alone accounts for 60% of the country's silver reserves and 70% of the output; there are more than 10 associated large and extra-large copper deposits. The cost of its development and utilization is high, and the selection and smelting are complicated and technically difficult. ...

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): C22B3/08C22B1/00
Inventor 蔡伟民王志平王海瑞吴浩东
Owner 上海国惠环境科技股份有限公司