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Method for recovery and treatment of used magnesium smelting flux or magnesium alloy smelting flux

A technology for recycling and processing magnesium alloys, applied in the field of recycling and processing magnesium smelting flux or magnesium alloy smelting flux, can solve the problems of loss of magnesium or magnesium alloy melt spreading, covering, refining capacity, and inability to use smelting flux, etc. Effects of Environmental Pollution

Active Publication Date: 2016-03-30
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The spreading, covering and refining ability of the smelting flux on the magnesium or magnesium alloy melt is closely related to the composition ratio of the smelting flux. The spreading, covering and refining abilities cannot be directly used as a flux for magnesium smelting or magnesium alloy smelting

Method used

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  • Method for recovery and treatment of used magnesium smelting flux or magnesium alloy smelting flux
  • Method for recovery and treatment of used magnesium smelting flux or magnesium alloy smelting flux
  • Method for recovery and treatment of used magnesium smelting flux or magnesium alloy smelting flux

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: 50 kilograms of magnesium alloy smelting flux recovery

[0032] (1) Weigh the used magnesium alloy smelting flux, put it into a stainless steel crucible, and heat it up to 600°C to melt it;

[0033] (2) Stir the melted flux evenly, take a sample and analyze the main components as shown in the table below:

[0034]

[0035]

[0036] In line with the requirements of RJ-1's main components and impurities, directly pour the molten smelting flux into the flux mold to cool to room temperature, use a crusher to crush it into a 3-5mm powder and particle mixture, weigh it according to the 5 kg standard, and use The RJ-1 flux of magnesium alloy is hermetically packaged in a plastic bag.

Embodiment 2

[0037] Embodiment 2: 50 kilograms of magnesium alloy smelting agent recovery

[0038] (1) Weigh the used magnesium alloy smelting flux, put it into a stainless steel crucible, and heat it up to 620°C to melt it;

[0039] (2) Stir the melted smelting flux evenly, take samples and analyze the main components as shown in the table below:

[0040]

[0041] The composition meets the requirements of the main components and impurities of RJ-2. Directly pour the molten smelting flux into the flux mold to cool to room temperature, and use a crusher to crush it into a mixture of powder and particles of 2-4mm. After weighing, according to the 2 kg standard, RJ-2 flux sealed and packaged into magnesium alloy with plastic bag;

Embodiment 3

[0042] Embodiment 3: 100 kilograms of magnesium alloy smelting flux recovery

[0043] (1) Weigh the used magnesium alloy smelting flux, put it into a stainless steel crucible, and heat it up to 500°C to melt it;

[0044] (2) Stir the melted smelting flux evenly, and sample and analyze the composition as shown in the following table:

[0045]

[0046] The main components and impurities that do not meet RJ-1 and RJ-2, HCl gas is passed into the molten smelting flux, and the MgO adsorbed in the smelting flux is converted into MgCl 2 , restore the spreading, covering and refining functions of the smelting flux after use; use the following calculation method to calculate the amount of HCl gas:

[0047] The first step is to calculate the excess amount of MgO according to the excess value of MgO and the total weight of the smelting flux;

[0048] 20-1.5=18.5 (kg)

[0049] The second step, according to the reaction formula: MgCl 2 5MgO+10HCl=6MgCl 2 +5H 2 O, calculate the con...

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Abstract

The invention relates to a recovery treatment method for a used magnesium or magnesium alloy smelting fluxing agent. The method includes: (1) raising the temperature to 470-660DEG C and conducting melting; (2) carrying out sampling and component analysis: i. if the components accord with the main components and impurities of a magnesium smelting fluxing agent or a magnesium alloy smelting fluxing agent, encapsulating the magnesium or magnesium alloy smelting fluxing agent; ii. under the circumstance that the components do not accord with the main components and impurities of the magnesium or magnesium alloy smelting fluxing agent, i.e. generally over-standard of the impurity MgO, introducing HCl and converting MgO into MgCl2; then conducting sampling from the smelting fluxing agent and performing component analysis, under the circumstance that the components do not accord with the main components and impurities of the magnesium or magnesium alloy smelting fluxing agent, e.g. the content of KCl is lower than a first lower line of the main components and impurities of the magnesium or magnesium alloy smelting fluxing agent, supplementing KCl; if the content of KCl or CaF2 or BaCl2 is lower than a second lower line of the main components and impurities of the magnesium or magnesium alloy smelting fluxing agent, supplementing KCl or CaF2 or BaCl2; and finally, encapsulating the smelting fluxing agent of magnesium or magnesium alloy. The method provided by the invention is of great significance for environmental pollution reduction and sustainable development of magnesium industry.

Description

technical field [0001] The invention relates to a recovery and treatment method for used magnesium smelting flux or magnesium alloy smelting flux. Background technique [0002] Metal magnesium and commonly used magnesium alloys will undergo severe oxidation and even combustion during the smelting process. Removal, that is, to achieve purification. In the production, the special flux for magnesium and magnesium alloy has been sprinkled on the liquid surface of magnesium and magnesium alloy and stirred, and smelting is carried out under the protection of the special flux. The purification is realized by using the flux to absorb the inclusions in the magnesium liquid and sink to the bottom of. Currently, these fluxes are disposed of as waste after use, salinizing the surrounding soil. The recovery and treatment of the used magnesium smelting flux or magnesium alloy smelting flux is of great significance to the sustainable development of the magnesium industry. [0003] To s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C1/06C22C23/00C22B9/10C22B26/22
CPCY02P10/20
Inventor 张奎李兴刚李永军马鸣龙石国梁袁家伟王秀荣刘正毛萍莉
Owner GRIMAT ENG INST CO LTD