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

Fluorine-free and sodium-free hollow spherical granular refining agent for aluminum alloy, preparation method and application

A technology for refining agent and aluminum alloy, which is applied in the field of fluorine-free and sodium-free hollow spherical granular refining agent for aluminum alloy and its preparation field, can solve the problems of large environmental pollution, flux inclusions, pollution of aluminum alloy melt, etc., so as to improve the refining effect , The effect of reducing oxidative burning loss and dosage

Active Publication Date: 2020-11-10
SICHUAN LANDE IND
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The refining agent currently used in the market is usually a powder refining agent, which contains fluorine and chlorine. During use, a large amount of harmful gas and smoke containing fluorine will be generated, which will cause great pollution to the environment. The powder mixed refining agent exists in the melt in solid form. In the medium, the adsorption and dissolution effect on slag inclusions is not obvious, and the degassing and slag removal effects are limited
If the operation is improper, it is easy to form flux inclusions and pollute the aluminum alloy melt; the local high-temperature chemical reaction during refining treatment will cause serious aluminum oxidation and burning, etc.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fluorine-free and sodium-free hollow spherical granular refining agent for aluminum alloy, preparation method and application
  • Fluorine-free and sodium-free hollow spherical granular refining agent for aluminum alloy, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] by MgCl 2 Powder: 35%, KCl Powder: 35%, MgCO 3 Powder: 10%, BaCl 2 Powder: 8%, CaCl 2 Powder: 6%, Mg 3 N 2 Powder: 6% component preparation granular refining agent;

[0050] The weighed MgCl 2 Mix evenly with KCl powder to obtain a mixture, put the mixture into a resistance crucible furnace to heat and melt, pass nitrogen to protect the melt, and after the mixture is completely melted, control the temperature of the melt at 450°C to 500°C, and add MgCO 3 Powder, BaCl 2 Powder, CaCl 2 Powder, Mg 3 N 2 After the powder is mixed, add it to the molten salt three times, stir continuously, control the temperature not to exceed 500°C after boiling fully, let it stand for 10 minutes, and transfer it to a granulator for granulation;

[0051]Preheat the hopper of the granulator to above 250°C, control the temperature of the incoming melt at 450°C to 480°C, keep warm, spray nitrogen into the granulator, and control the pressure of nitrogen to 4Mpa, under the protection o...

Embodiment 2

[0055] by MgCl 2 Powder: 33%, KCl Powder: 37%, MgCO 3 Powder: 8%, BaCl 2 Powder: 6%, CaCl 2 Powder: 8%, Mg 3 N 2 Powder: 8% of components to prepare granular refining agent.

[0056] The weighed MgCl 2 Mix evenly with KCl powder to obtain a mixture, put the mixture into a resistance crucible furnace to heat and melt, pass nitrogen to protect the melt, and after the mixture is completely melted, control the temperature of the melt at 450°C to 500°C, and add MgCO 3 Powder, BaCl 2 Powder, CaCl 2 Powder, Mg 3 N 2 After the powder is mixed, add it to the molten salt three times, stir continuously, control the temperature not to exceed 500°C after boiling fully, let it stand for 10 minutes, and transfer it to a granulator for granulation;

[0057] The hopper of the granulator is preheated to above 250°C, the temperature of the melt to be transferred is controlled at 450°C to 480°C, and the heat preservation is continued, and argon is injected into the granulator, and the p...

Embodiment 3

[0061] by MgCl 2 Powder: 40%, KCl Powder: 40%, MgCO 3 Powder: 5%, BaCl 2 Powder: 5%, CaCl 2 Powder: 5%, Mg 3 N 2 Powder: 5% of components to prepare granular refining agent.

[0062] The weighed MgCl 2 Mix evenly with KCl powder to obtain a mixture, put the mixture into a resistance crucible furnace to heat and melt, pass nitrogen to protect the melt, and after the mixture is completely melted, control the temperature of the melt at 450°C to 500°C, and add MgCO 3 Powder, BaCl 2 Powder, CaCl 2 Powder, Mg 3 N 2 After the powder is mixed, add it to the molten salt three times, stir continuously, control the temperature not to exceed 500°C after boiling fully, let it stand for 10 minutes, and transfer it to a granulator for granulation.

[0063] The hopper of the granulator is preheated to above 250°C, the temperature of the transferred melt is controlled at 450°C to 480°C, and the heat preservation is continued, nitrogen is sprayed into the granulator, and the nitrogen ...

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 provides a fluoride-free sodium-free hollow spherical granular refining agent for aluminum alloy, and belongs to the technical field of aluminum alloy refining agents. The refining agentis prepared from the following raw materials: 30%-40% of MgCl2 powder, 30%-40% of KCl powder, 5%-10% of MgCO3 powder, 4%-8% of BaCl2 powder, 4%-8% of CaCl2 powder and 3%-10% of Mg3N2 powder. The preparation method of the refining agent comprises the following steps: 1) putting a mixture of MgCl2 powder and KCl powder into a resistance crucible furnace; 2) electrifying the resistance crucible furnace to raise the temperature, introducing inert gas for protection, gradually heating the mixture and starting to melt; 3) after the mixture is molten, controlling the melt temperature to be 450-500 DEG C, and adding MgCO3 powder, BaCl2 powder, CaCl2 powder and Mg3N2 powder into the molten salt; 4) after the powder is completely melted, uniformly stirring the melt, controlling the temperature to be not more than 500 DEG C, and standing for 8-15 minutes; and 5) transferring the melted melt into a granulator, blowing inert gas into the granulator, and preparing the melt into spherical particlesunder the protection of the inert gas.

Description

technical field [0001] The invention belongs to the technical field of refining agents for aluminum alloys, in particular to a fluorine-free and sodium-free hollow spherical granular refining agent for aluminum alloys, a preparation method and application thereof. Background technique [0002] Metallurgical defects in aluminum, such as inclusions, hydrogen, impurity elements, etc., directly affect its mechanical properties and formability. Melt purification is the key technology to improve the quality of aluminum. In the process of aluminum alloy melting and casting, after refining, slag removal, degassing and filtering, the content of inclusions is significantly reduced, but if the refining effect is not good, there are still trace inclusions, and finally enter the ingot, the subsequent processing of the billet and the final The physical properties, mechanical properties, corrosion resistance and appearance quality of the product have a significant impact. Therefore, the ...

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): C22C1/06C22C21/00C22C23/00C22B9/10C22B21/06C22B26/22
CPCC22B9/10C22B21/062C22B26/22C22C1/06C22C21/00C22C23/00
Inventor 袁名万
Owner SICHUAN LANDE IND