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Process for separating molybdenum and nickel form black shale containing molybdenum and nickel

A black shale, molybdenum-nickel technology, applied in the field of metallurgy and chemical industry, can solve the problems of a large amount of flue gas, low leaching conversion rate, environmental pollution, etc., and achieve the effect of avoiding pollution

Inactive Publication Date: 2008-10-22
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

The total recoveries of molybdenum and nickel in this inventive method are respectively 90% and 94%, but there are problems such as complex process operation, large consumption of reagents and high cost
[0009] 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 content of molybdenum is 2-6%, nickel content of 2.5 to 3%, about 15% of iron, and about 20% of sulfur), the addition of salt is limited, and at the same time, due to the complex behavior of molybdenum-nickel minerals, this fundamentally limits the reaction speed and conversion rate of molybdenum-nickel minerals; The method of leaching, its leaching conversion rate is low, 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

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  • Process for separating molybdenum and nickel form black shale containing molybdenum and nickel

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] 1. Raw materials: molybdenum content of 6.32%, nickel content of 3.05%, iron content of 15.27%, sulfur content of 21.58%, broken and pulverized -200 mesh (≥90%).

[0025] 2. Add industrial sulfuric acid with a concentration of 90% to 93% to adjust the slurry, control the concentration of sulfuric acid to 200g / L, and the solid-liquid mass volume ratio is 1:4. 150°C, under the condition of 1.5MPa internal pressure, the leaching reaction was carried out for 240 minutes, and the leaching residue and leaching solution were obtained by filtration, wherein the leaching solution was rich in molybdenum and nickel.

[0026] Molybdenum leaching rate: 90.37% Nickel leaching rate: 95.69%

[0027] 3. Add the solution rich in molybdenum and nickel into the storage tank, adjust the pH of the solution to 2.06, use the common extraction agent P204+TBP, control the extraction temperature at 25°C, and extract for 20 minutes under the condition of extraction ratio 1:2, Direct extraction of m...

example 2

[0034] 1. Raw materials: molybdenum content of 5.92%, nickel content of 3.17%, iron content of 16.69%, sulfur content of 17.88%, crushed and pulverized -200 mesh (≥90%).

[0035] 2. Add industrial sulfuric acid with a concentration of 90-93% to adjust the slurry, control the concentration of sulfuric acid to 100g / L, and the solid-liquid mass volume ratio is 1:6. At 200°C, under the condition of 3.0MPa internal pressure, the leaching reaction was carried out for 60 minutes, and the leaching residue and leaching solution were obtained by filtration, wherein the leaching solution was rich in molybdenum and nickel.

[0036] Molybdenum leaching rate: 82.16% Nickel leaching rate: 91.73%

[0037] 3. Add the solution rich in molybdenum and nickel into the storage tank, adjust the pH of the solution to 2.13, use the common extraction agent P204+TBP, control the extraction temperature at 15°C, and extract for 10 minutes under the condition of extraction ratio 1:1. Direct extraction of ...

example 3

[0044] 1. Raw materials: molybdenum content of 4.58%, nickel content of 2.79%, iron content of 7.37%, sulfur content of 23.16%, crushed and pulverized - 200 mesh (≥90%).

[0045] 2. Add industrial sulfuric acid with a concentration of 90-93% to adjust the slurry, control the concentration of sulfuric acid to 250g / L, and the solid-liquid mass volume ratio is 1:2. The temperature is 100°C and the pressure in the kettle is 1.0MPa, the leaching reaction is carried out for 150 minutes, and the leaching residue and leaching solution are obtained by filtration, wherein the leaching solution is enriched in molybdenum and nickel.

[0046] Molybdenum leaching rate: 86.28% Nickel leaching rate: 95.33%

[0047] 3. Add the solution rich in molybdenum and nickel into the storage tank, adjust the pH of the solution to 1.92, use the common extraction agent P204+TBP, control the extraction temperature at 35°C, and extract for 30 minutes under the condition of extraction ratio 1:3. Direct extr...

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Abstract

The invention relates to a method for separating molybdenum and nickel from black shale containing molybdenum and nickel, belonging to the metallurgic-chemical technical field. The method is characterized in that the black shale containing molybdenum and nickel is crushed and ground and undergoes oxygen pressure leaching in a pressure pan by using diluted acids and oxidants, and leach solution containing molybdenum and nickel and leached mud are obtained after filtering; ammonium molybdate and nickel sulphate solution are obtained respectively after the leach solution undergoes extraction and back extraction by different back extraction agents. The method leaves out a calcining step existing in the conventional process, thereby avoiding the environmental pollution of gases such as SO2; by the oxygen pressure leaching, molybdenum and nickel in black carbonaceous shale containing molybdenum and nickel are directly converted and dissolved so as to generate molybdenum sulfate acyl((MoO2)SO4) and nickel sulfate(NiSO4) to enter the solution for enrichment, so that the method better realizes the separation and extraction of molybdenum and nickel and is a clean manufacturing technology with reinforced conversion; moreover, the principal process is not limited by changes of mineral compositions.

Description

technical field [0001] The invention relates to a method for separating molybdenum and nickel from black shale containing molybdenum and nickel, belonging to the technical field of metallurgy and chemical industry. Background technique [0002] Black carbonaceous shale is formed in ancient strata such as Sinian mining, Hankai system, and Silurian system. It is a high-grade combustible mineral produced by bacteria, algae and other organisms in a shallow sea reduction environment. It is characterized by high ash content and low heat. Its value and appearance are like black stone, containing various metal elements such as vanadium, molybdenum, nickel, phosphorus, copper, sulfur, iron and uranium. In some strata, one or several associated elements reach the industrial individual mining grade or cut-off grade, which can be used as a certain mineral resource to be independently mined, and the valuable components can be recovered through smelting. It is precisely because of the ex...

Claims

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Application Information

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IPC IPC(8): C22B3/06C22B3/08C22B3/26
CPCY02P10/20
Inventor 魏昶李存兄樊刚邓志敢李旻廷
Owner KUNMING UNIV OF SCI & TECH
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