Refining agent for aluminum and aluminum alloy

Abstract

The invention relates to a refining agent for aluminum and aluminum alloy. The refining agent is characterized by mainly comprising the following components in percentage by mass: 30 to 85 percent of NaCl, 5 to 40 percent of Na2SiF6, 5 to 40 percent of Na2SO4, 2 to 20 percent of CaF2 and 0.5 to 5 percent of C6C16; and the refining agent also can comprise one or more of CaMg(CO3)2, Na3AlF6, Na2S2O3 and NaF. The potassium-free refining agent provided by the invention has good slag forming performance, strong gas and impurity removing capability and low cost; and the aluminum ash produced by refining the aluminum and the aluminum alloy through the refining agent can realize recycle.

Description

1. Technical field

[0001] The invention belongs to the field of metallurgy and relates to a refining agent for aluminum and aluminum alloys, in particular to a refining agent for purifying aluminum melts. 2. Background technology

[0002] Aluminum liquid or aluminum alloy liquid will inevitably absorb and carry gas and produce inclusions during electrolysis, smelting and transfer, which will reduce the purity of aluminum liquid or aluminum alloy liquid and affect the quality. Therefore, it is necessary to refine and purify aluminum liquid and aluminum alloy liquid to remove these gases and inclusions, improve the quality of aluminum liquid or aluminum alloy liquid, and add refining agent to aluminum liquid or aluminum alloy liquid for refining and purification treatment is a commonly used measure. Some wastes will be produced during the refining process, commonly known as "aluminum ash", and more than 80% of the aluminum ash is metallic aluminum and alumina. At present, th...

Examples

Embodiment 1

[0019] Weigh NaCl by mass percentage: 54.5%, NaCl 2 SiF 6 : 20%, Na 2 SO 4 : 5%, CaF 2 : 20%, C 6 Cl 6 : 0.5%, the above several materials are mixed, stirred evenly, put into a crucible to overheat and melt to remove the crystal water, then keep warm for 40 minutes, and process it into a refining agent after cooling.

Embodiment 2

[0021] Weigh NaCl by mass percentage: 30%, NaCl 2 SiF 6 : 30%, Na 2 SO 4 : 20%, CaF 2 : 19%, C 6 Cl 6 : 1%, the above several materials are mixed, stirred evenly, put into a crucible and overheated to melt to remove crystal water, then keep warm for 45 minutes, and process it into a refining agent after cooling.

Embodiment 3

[0023] Weigh NaCl by mass percentage: 40%, Na 2 SiF 6 : 15%, Na2 SO 4 : 30%, CaF 2 : 12%, C 6 Cl 6 : 3%, the above several materials are mixed, stirred evenly, put into a crucible to overheat and melt to remove the crystal water, then keep warm for 50 minutes, and process it into a refining agent after cooling.

1. Technical field

[0001] The invention belongs to the field of metallurgy and relates to a refining agent for aluminum and aluminum alloys, in particular to a refining agent for purifying aluminum melts. 2. Background technology

[0002] Aluminum liquid or aluminum alloy liquid will inevitably absorb and carry gas and produce inclusions during electrolysis, smelting and transfer, which will reduce the purity of aluminum liquid or aluminum alloy liquid and affect the quality. Therefore, it is necessary to refine and purify aluminum liquid and aluminum alloy liquid to remove these gases and inclusions, improve the quality of aluminum liquid or aluminum alloy liquid, and add refining agent to aluminum liquid or aluminum alloy liquid for refining and purification treatment is a commonly used measure. Some wastes will be produced during the refining process, commonly known as "aluminum ash", and more than 80% of the aluminum ash is metallic aluminum and alumina. At present, th...

Examples

Embodiment 1

[0019] Weigh NaCl by mass percentage: 54.5%, NaCl 2 SiF 6 : 20%, Na 2 SO 4 : 5%, CaF 2 : 20%, C 6 Cl 6 : 0.5%, the above several materials are mixed, stirred evenly, put into a crucible to overheat and melt to remove the crystal water, then keep warm for 40 minutes, and process it into a refining agent after cooling.

Embodiment 2

[0021] Weigh NaCl by mass percentage: 30%, NaCl 2 SiF 6 : 30%, Na 2 SO 4 : 20%, CaF 2 : 19%, C 6 Cl 6 : 1%, the above several materials are mixed, stirred evenly, put into a crucible and overheated to melt to remove crystal water, then keep warm for 45 minutes, and process it into a refining agent after cooling.

Embodiment 3

[0023] Weigh NaCl by mass percentage: 40%, Na 2 SiF 6 : 15%, Na2 SO 4 : 30%, CaF 2 : 12%, C 6 Cl 6 : 3%, the above several materials are mixed, stirred evenly, put into a crucible to overheat and melt to remove the crystal water, then keep warm for 50 minutes, and process it into a refining agent after cooling.