Method for separating ternary alloy of lead, tin and stibium

A ternary alloy and lead separation technology, applied in the direction of improving process efficiency, etc., can solve problems such as long segregation time, easy oxidation of antimony, intermittent operation, etc., achieve good separation effect, high recovery rate, and simplify the process.

Inactive Publication Date: 2010-04-21
KUNMING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the segregation time is long, the temperature is difficult t

Method used

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  • Method for separating ternary alloy of lead, tin and stibium
  • Method for separating ternary alloy of lead, tin and stibium
  • Method for separating ternary alloy of lead, tin and stibium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Table 1 The weight percentage of raw materials

[0018]

[0019] Put 1500g of raw materials into a graphite crucible and place them in a vacuum furnace. Pump the vacuum of the vacuum furnace to 5~15Pa; start to heat up at a rate of 5℃ / min. When the temperature in the furnace rises to the melting point of raw materials 480℃, keep the temperature constant for 50min , Then heat up to 950°C at a rate of 15°C / min, keep the temperature for 20 minutes and then to 1200°C at a rate of 15°C / min for 40 minutes, turn off the power to start cooling, continue to open the vacuum pump to ensure the vacuum environment in the furnace and prevent materials After being oxidized, when the temperature in the furnace drops to 60-100°C, the vacuum pump is turned off, the furnace is opened to take materials, and the residues and volatiles are respectively recovered and tested. The product composition obtained is shown in Table 2.

[0020] Table 2 Product ingredient weight percentage

[0021]

[0022]...

Embodiment 2

[0024] Table 3 The weight percentage of raw materials

[0025]

[0026] Put 2000g of raw material into a graphite crucible and place it in a vacuum furnace, pump it to 5~15Pa, and raise the temperature at a rate of 5℃ / min. When the temperature in the furnace rises to the melting point of the raw material 410℃, keep it at a constant temperature for 50min, then 15℃ / The temperature is increased to 950°C at a rate of min for 10 minutes, and then to 1200°C at a rate of 15°C / min for 40 minutes. The lead-antimony alloy volatilizes completely. Turn off the power and start cooling to ensure the vacuum environment in the furnace. When the temperature in the furnace drops At 60°C, the vacuum pump was turned off, the furnace was opened to take materials, and the residues and volatiles were recovered and tested respectively. The product composition obtained is shown in Table 4.

[0027] Table 4 Product ingredient weight percentage

[0028]

[0029] The recovery rates of lead, tin, and antimony ...

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Abstract

The invention relates to a method for separating a ternary alloy of lead, tin and stibium, which adopts a vacuum distillation method to treat the ternary alloy of lead, tin and stibium, wherein the distillation temperature is controlled at 900 to 1,200 DEG C, the distillation time is 40 to 60min and the vacuum degree is 5 to 15 Pa. The three components in the alloy are distilled in one step, then the tin of a high boiling point is kept in a liquid state, and the lead and the stibium of a low boiling point are volatilized from the alloy in a gas state so as to be separated from the liquid tin. The method can reduce the content of the lead and the stibium in the lead to be less than 1 percent, and the recovery rates of the lead, tin and stibium are over 98 percent.

Description

[0001] 1. Technical Field: The present invention relates to a method for separating lead-tin-antimony ternary alloy, which belongs to the technical field of non-ferrous vacuum metallurgy. 2. Background technology [0002] Lead-tin-antimony ternary alloy appears in the process of lead smelting, tin smelting, and antimony smelting. The ternary alloy has a wide range of uses. With the increasing number of waste secondary resources, the alloy has been separated, recycled and reused. Without delay. At present, tin-based alloys often use oxidation blowing and alkaline refining methods to remove antimony. The principles of these two methods are based on the different affinity of these elements with oxygen to remove and separate impurities. The disadvantage of these two methods is that the antimony element becomes the oxide antimony white (Sb 2 O 3 ), if elemental antimony is required, reduction smelting is required. Antimony in alkaline refining is Na 3 SbO 4 The form of slag floats on...

Claims

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Application Information

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IPC IPC(8): C22C3/00C22C11/08C22C12/00C22C30/04C22B9/02C22B25/00
CPCY02P10/20
Inventor 杨斌戴卫平刘大春贾国斌刘永成速斌徐宝强王飞邓勇
Owner KUNMING UNIV OF SCI & TECH
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