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Method for separating iron element, magnesium element and aluminium element from calcium-removed calcium carbide slag

A technology for separating calcium carbide slag and iron, which is applied in the field of separating iron from calcium carbide slag for magnesium and aluminum elements, can solve the problem of low recycling rate of calcium carbide slag, and achieve the effects of low processing cost, low consumption, and small environmental emissions

Active Publication Date: 2019-04-30
辽宁赛菲化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for separating iron, magnesium and aluminum elements from the calcium carbide slag after the calcium removal treatment in view of the low reutilization rate of calcium carbide slag in the prior art. A method for separating iron, aluminum and magnesium elements from calcium carbide slag by phase transfer technology, with low cost and high utilization rate

Method used

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  • Method for separating iron element, magnesium element and aluminium element from calcium-removed calcium carbide slag
  • Method for separating iron element, magnesium element and aluminium element from calcium-removed calcium carbide slag
  • Method for separating iron element, magnesium element and aluminium element from calcium-removed calcium carbide slag

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Effect test

Embodiment 1

[0044] Get calcium carbide filter residue 500 grams after decalcification treatment, put into 1000ml beaker, add mass fraction and be 40% dilute sulfuric acid after filter residue is dissolved, filter insoluble residue, filtrate is vitriol solution (for extracting the raw material of metal ion ), add acid to adjust PH<2.5; the sulfate solution is gradually added dropwise to 3000g extraction solution I (extractant in the extraction solution I is triethylamine, trioctylamine and C18 alkane with a molar ratio of 1:6:3) The mixed solution of dimethylamine, the solvent is kerosene or sulfonated kerosene, and the mass percent of the extractant is 30%) in a 5000ml reactor, stirring continuously for 3-5 hours, then transferred to the oil-water separator, and the upper layer oil The phases were separated and collected to obtain 3033.6 g of an iron-containing organic solution, and the lower aqueous phase was a sulfate solution containing magnesium and aluminum;

[0045] Drop the iron-co...

Embodiment 2

[0049]Get calcium carbide filter residue 500 grams after decalcification treatment, put into 1000ml beaker, add mass fraction and be 40% dilute sulfuric acid after filter residue is dissolved, filter insoluble residue, filtrate is vitriol solution (for extracting the raw material of metal ion ), adding acid to adjust PH<2.5; the sulfate solution is gradually added dropwise to 3000g extraction solution I (in the extraction solution I, the extraction agent is dioctylamine, and the solvent is 150# aromatics, and the mass percentage of the extraction agent is 50%) In a 5000ml reactor, continue to stir for 3-5 hours, then transfer to the oil-water separator, separate and collect the upper oil phase to obtain 3033.6g of iron-containing organic solution; the lower water phase is a sulfate solution containing magnesium and aluminum;

[0050] Drop the iron-containing organic solution into 500 g of dilute sulfuric acid aqueous solution with a concentration of 50%, continue to stir for 2-...

Embodiment 3

[0054] Get calcium carbide filter residue 500 grams after decalcification treatment, put into 1000ml beaker, add mass fraction and be after the dilute hydrochloric acid of 40% filter residue is dissolved, a small amount of residue is filtered out, and filtrate is chloride salt solution (for extracting metal ion raw material), add acid to adjust PH<2.5; the chloride salt solution is gradually added dropwise to 3000g extraction solution I (extractant in the extraction solution I is triethylamine, trioctylamine and triethylamine with a molar ratio of 1:6:3 The mixed solution of C18 alkyldimethylamine, the solvent is aromatic hydrocarbon or alkylbenzene or the mixed solution of the two, the mass percentage of extractant is 70%) in the 5000ml reactor, keep stirring for 3-5 hours, then transfer to In the oil-water separator, the upper oil phase was separated and collected to obtain 3033.6 g of an iron-containing organic solution, and the lower aqueous phase was a sulfate solution con...

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Abstract

The invention discloses a method for separating an iron element, a magnesium element and an aluminium element from calcium-removed calcium carbide slag. The method for separating the iron element, themagnesium element and the aluminium element from the calcium-removed calcium carbide slag includes the following steps that 1, the calcium-removed calcium carbide slag is acidized with acid, solid substances are filtered out, and then a mixed salt solution containing iron, aluminium and magnesium is obtained; 2, an extraction solution I is added, the ph is adjusted to be smaller than 2.0, an aqueous phase salt solution containing iron organic phase and magnesium aluminium is obtained after stirring and separation; 3, organic amine or an organic amine solution is added dropwise, precipitationof aluminium hydroxide is filtered after precipitation of aluminum ions is completed, and the aqueous phase salt solution containing magnesium is obtained; 4, an extraction solution II containing organic amine is added, and the aqueous solution containing magnesium organic phase and the organic amine is obtained after stirring and separation; and the aqueous solution containing the organic amine is applied in the step 3; and 5, organic phase containing iron and dilute sulfuric acid were stripped countercurrent, and an extractant in the organic phase containing iron is regenerated and applied to the extraction solution I in the step 2. The method for separating the iron element, the magnesium element and the aluminium element from the calcium-removed calcium carbide slag is environmentally-friendly, and the treatment cost is low.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization and development of stone slag, in particular to a method for separating iron, magnesium and aluminum elements from calcium carbide slag. Background technique [0002] Carbide slag is a large amount of industrial waste discharged when calcium carbide is hydrolyzed to produce acetylene, and the discharge amount is about 75%-85% of the calcium carbide output. The current utilization rate of this kind of solid waste is less than 50%, and some factories and some regions are even lower than this figure. At present, most of the treatment methods for unusable solid waste are landfill, which occupies a large amount of land, and the enterprise needs to pay a large amount of land acquisition and management fees, and also pollutes the water source around the landfill through infiltration, making the water source and land alkaline , causing harm to the human living environment. [0003] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B21/00C22B26/22C21B15/00C22B3/28C22B3/38
CPCC21B15/00C22B7/007C22B21/0023C22B26/22C22B3/282C22B3/286C22B3/3846Y02P10/20
Inventor 张舜杨林燕韩薇杨洋
Owner 辽宁赛菲化学有限公司
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