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Preparation process of Pb-Ca-Sn-Al alloy

A technology of calcium-aluminum alloy and aluminum alloy, which is applied in the preparation process of lead-calcium-tin-aluminum alloy, which can solve the problems of difficult control of calcium content, uneven stirring, calcium oxidation, etc., to reduce the waiting time for cooling down and reduce the consumption of fuel , Reduce the effect of oxidation and burning loss

Active Publication Date: 2012-02-22
山东久力新能源集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since calcium is an active metal, the atomic weight of calcium is 40, while the atomic weight of lead is 207, so calcium is lighter than lead, and it is not easy to press into the inside of the melting pot during the preparation process, and the oxidation and burning loss of calcium are more serious in high temperature environments. Calcium content is not easy to control
At the same time, due to the large amount of calcium oxidation and burning loss in the preparation process of lead-calcium-tin-aluminum alloy, the pollution to the environment is serious.
The atomic weight of aluminum is 27. During the alloy preparation process, there are also problems such as difficulty in pressing into the melting pot and uneven stirring.
In addition, in the storage battery industry, square melting pots are generally used to prepare alloys, and compressed air is blown in for stirring. In the process of alloy preparation, because the melting pot is square, there are dead angles in the stirring process. In addition, the compressed air stirring is not sufficient. Ensure the uniformity of the alloy composition in the whole pot

Method used

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  • Preparation process of Pb-Ca-Sn-Al alloy
  • Preparation process of Pb-Ca-Sn-Al alloy

Examples

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Embodiment 1

[0032] A preparation process of lead-calcium-tin-aluminum alloy, which comprises the following steps:

[0033] (1) Prepare raw materials: lead, tin and calcium aluminum alloy, and each raw material accounts for the weight percent of total raw material as:

[0034] Lead 99.25%

[0035] Tin 0.6%

[0036] Calcium aluminum alloy 0.15%,

[0037] Wherein, the weight ratio of calcium to aluminum in the calcium aluminum alloy is 3:2;

[0038] (2) Add 70% of the lead material to the lead melting pot, heat to 670°C to fully melt the lead, stir the lead melt for about 2 to 3 minutes, and pour into the lead in the stirring state. Add calcium-aluminum alloy to the melt, and continue to stir for 2 minutes, so that the calcium-aluminum alloy is completely melted and mixed evenly;

[0039] (3) Stop stirring and heating, add the remaining lead into the lead melting pot, after the remaining lead is melted, stir the mixed melt, add tin to the mixed melt under stirring state, and continue to ...

Embodiment 2

[0044] A preparation process of lead-calcium-tin-aluminum alloy, which comprises the following steps:

[0045] (1) Prepare raw materials: lead, tin and calcium aluminum alloy, and each raw material accounts for the weight percent of total raw material as:

[0046] Lead 99.35%

[0047] Tin 0.5%

[0048] Calcium aluminum alloy 0.15%,

[0049] Wherein, the weight ratio of calcium to aluminum in the calcium aluminum alloy is 2:1;

[0050] (2) Add 75% of lead, which accounts for 75% of the total weight of the lead raw material, into the lead melting pot, heat to 700°C to fully melt the lead ingot, and stir the lead melt for about 2 to 3 minutes. Add calcium-aluminum alloy to the lead melt, and continue to stir for 2 minutes to completely melt the calcium-aluminum alloy and mix evenly;

[0051] (3) Stop stirring and heating, add the remaining lead in the lead melting pot, after the remaining lead is melted, stir the mixed molten solution, add tin to the mixed molten solution und...

Embodiment 3

[0056] A preparation process of lead-calcium-tin-aluminum alloy, which comprises the following steps:

[0057] (1) Prepare raw materials: lead, tin and calcium aluminum alloy, and each raw material accounts for the weight percent of total raw material as:

[0058] Lead 99.45%

[0059] Tin 0.45%

[0060] Calcium aluminum alloy 0.1%,

[0061] Wherein, the weight ratio of calcium to aluminum in calcium aluminum alloy is 5:2;

[0062] (2) Add 80% of the lead material to the lead melting pot, heat to 700°C to fully melt the lead, stir the lead melt for about 2 to 3 minutes, and pour into the lead in the stirring state. Add calcium-aluminum alloy to the melt, and continue to stir for 2 minutes, so that the calcium-aluminum alloy is completely melted and mixed evenly;

[0063] (3) Stop stirring and heating, add the remaining lead in the lead melting pot, after the remaining lead is melted, stir the mixed molten solution, add tin to the mixed molten solution under the stirring state...

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Abstract

The invention discloses a preparation process of Pb-Ca-Sn-Al alloy. The invention is characterized in that (1) the lead with the required weight in the alloy formula is added for two times, and the lead which is added for the second time is fully used for cooling the molten liquid, thereby shortening the waiting time of cooling and reducing the fuel consumption; (2) a method of respectively adding aluminum ingots and calcium chips in the traditional production process is replaced by a method of directly adding Ca-Al intermediate alloy to reduce the adding frequency, and alloy blocks are directly stirred into a lead melting kettle by a stirring device to reduce the oxidation and the melting loss of calcium; and (3) a lead melting kettle with a hemispherical inner cavity is adopted, and a blade stirring device is arranged in the kettle, thereby shortening the stirring time and improving the stirring uniformity.

Description

technical field [0001] The invention relates to a configuration process of metal alloys, in particular to a preparation process of lead-calcium-tin-aluminum alloy. Background technique [0002] Lead-calcium-tin-aluminum alloys are widely used in the production of maintenance-free lead-acid battery grids and lead parts, but the preparation of lead-calcium-tin-aluminum alloys is difficult. The preparation process of the traditional lead-calcium-tin-aluminum alloy is as follows: 1. Add the lead ingot in the alloy formula in the melting furnace (pot), heat to 700°C, after the lead ingot in the furnace is melted, add the required amount of aluminum ingot and Press the aluminum ingot into the lead liquid, and stir for 5-10 minutes after the aluminum ingot is melted, so that all the aluminum is evenly melted in the lead liquid. 2. When the temperature of the lead-aluminum alloy liquid in the furnace is between 680°C and 700°C, start to press the required calcium chips into the lea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C11/06C22C1/02
Inventor 韦学忠
Owner 山东久力新能源集团有限公司
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