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A kind of solid-liquid dual-phase copper alloy smelting covering agent and its application

A technology of copper alloy and covering agent, which is applied in the field of melt purification in the copper smelting process, can solve the problems of anti-oxidation and volatilization efficiency of the covering agent to be improved, and achieve the effects of reducing the amount of furnace ash, simple preparation steps, and preventing sinking

Active Publication Date: 2022-05-17
NINGBO CHANGZHEN COPPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to overcome the problem that the anti-oxidation and volatilization efficiency of the capping agent need to be improved in the prior art, and provides a solid-liquid two-phase copper alloy smelting covering agent and its application, so that the covering agent is in the solid-liquid state during the entire covering process. The two-phase state ensures that the lower layer of the covering agent is a liquid phase, directly in contact with the melt, preventing air from entering the melt, and preventing oxidation and volatilization of the copper alloy melt; the upper layer is a solid phase, which plays a role in covering the liquid phase, forming The solid protective layer, in addition to the decomposition of solid matter itself, can also react to generate gas carbon dioxide protective gas and float on the surface of the liquid layer, which is also convenient for final slag removal

Method used

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  • A kind of solid-liquid dual-phase copper alloy smelting covering agent and its application
  • A kind of solid-liquid dual-phase copper alloy smelting covering agent and its application
  • A kind of solid-liquid dual-phase copper alloy smelting covering agent and its application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The application of the solid-liquid two-phase copper alloy smelting covering agent comprises the following application steps:

[0050] (1) Raw materials are prepared in proportion, Na 2 SiF 6 (purity≥98.5%): CaCO 3 (Particle size 100-500 mesh, whiteness ≥ 96%): NaCl (purity ≥ 92%) = 49.5%: 47.5%: 3%;

[0051] (2) Use a mixer to fully mix each raw material component to form a mixture;

[0052] (3) The mixture accounting for 0.25% of the total weight of the copper alloy melt is quantitatively sprinkled on the surface of the copper alloy melt in the casting furnace, and stirred, and the furnace temperature is maintained at 1000° C. to form a covering agent that continuously maintains the solid-liquid dual phase, and the copper The alloy melt was covered for 24 hours, the surface oxide ash in the furnace was collected, the sample was ball milled, washed and dried, and the proportion of the furnace ash and sand head was measured.

[0053] The casting furnace includes a f...

Embodiment 2

[0055] The application of the solid-liquid two-phase copper alloy smelting covering agent comprises the following application steps:

[0056] (1) Raw materials are prepared in proportion, Na 2 SiF 6 (purity≥98.5%): CaCO 3 (Particle size 100-500 mesh, whiteness ≥ 96%): NaCl (purity ≥ 92%) = 48%: 47%: 5%;

[0057] (2) Use a mixer to fully mix each raw material component to form a mixture;

[0058] (3) Quantitatively sprinkle the mixture accounting for 0.15% to 0.35% of the total weight of the copper alloy melt on the surface of the copper alloy melt in the casting furnace, and stir it to maintain the furnace temperature at 950°C to form a covering agent that continuously maintains the solid-liquid dual phase , Cover the copper alloy melt for 22 hours, collect the surface oxide ash in the furnace, take samples for ball milling, washing and drying, and measure the proportion of the furnace ash sand head.

[0059] The casting furnace includes a furnace body 1, and the furnace b...

Embodiment 3

[0061] The application of the solid-liquid two-phase copper alloy smelting covering agent comprises the following application steps:

[0062] (1) Raw materials are prepared in proportion, Na 2 SiF 6 (purity≥98.5%): CaCO 3 (Particle size 100-500 mesh, whiteness ≥ 96%): NaCl (purity ≥ 92%) = 51%: 48%: 1%;

[0063] (2) Use a mixer to fully mix each raw material component to form a mixture;

[0064] (3) Quantitatively sprinkle the mixture accounting for 0.15% to 0.35% of the total weight of the copper alloy melt on the surface of the copper alloy melt in the casting furnace, and stir it to maintain the furnace temperature at 1100°C to form a covering agent that continuously maintains the solid-liquid dual phase , Cover the copper alloy melt for 20 hours, collect the surface oxidation ash in the furnace, take samples for ball milling, washing and drying, and measure the proportion of the furnace ash sand head.

[0065] The casting furnace includes a furnace body 1, and the furn...

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Abstract

The invention relates to the technical field of melt purification in the copper smelting process. Aiming at the problem that the anti-oxidation and volatilization efficiency of the capping agent in the prior art needs to be improved, a solid-liquid two-phase copper alloy smelting covering agent and its application are disclosed. The raw materials in the agent are prepared according to their mass percentages: Na 2 SiF 6 : CaCO 3 : NaCl=48~51%: 47~48%: balance. Including: preparing raw materials; mixing evenly; spreading the mixture in the copper alloy melt casting furnace, and stirring it, maintaining the furnace temperature at 900~1100°C, forming a covering agent that continuously maintains the solid-liquid dual phase, and covering the copper alloy melt . In the present invention, the covering agent is in a solid-liquid dual-phase state throughout the covering process, ensuring that the lower layer of the covering agent is in a liquid phase, directly in contact with the melt, preventing air from entering the melt, and preventing oxidation and volatilization of the copper alloy melt; the upper layer It is a solid phase, which plays a pressing role on the liquid phase to form a solid protective layer.

Description

technical field [0001] The invention relates to the technical field of melt purification in copper smelting process, in particular to a solid-liquid two-phase covering agent for copper alloy smelting and its application. Background technique [0002] In recent years, the recycling, remelting and reuse of waste brass has attracted widespread attention from industry and science, mainly due to its good regeneration performance. Compared with primary copper materials, recasting scrap brass has more energy-saving, environmental protection and economic advantages; In addition, coupled with the lack of primary copper resources at home and abroad and the gradual depreciation and scrapping of the first batch of copper products 20 years ago, recycled copper will inevitably enter the stage of history in the future. Casting in industrial melting furnaces is an important processing method. Traditional single-body melting furnaces can no longer meet the needs of large-tonnage production. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/06C22C9/00
CPCC22C1/06C22C9/00Y02P10/20
Inventor 宋卡迪黄腾王法超江溢川沈守稳刘伟郎滨
Owner NINGBO CHANGZHEN COPPER CO LTD
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