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Production method of grade tin containing 99.99% of Sn

A production method and grade technology, applied in the direction of improving process efficiency, can solve the problems of reduced equipment capacity, large amount of slag in the process, low recovery rate of smelting, etc., and achieve the effect of high production efficiency and short process flow

Active Publication Date: 2014-03-26
LAIBIN CHINA TIN SMELTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this method produces Sn99.99% grade tin, it has the advantage of not needing to add any production facilities, but its disadvantages are strict technical condition control requirements, large consumption of impurity removal reagents, serious reduction in equipment production capacity, and large amount of process slag produced , the smelting recovery rate is low

Method used

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  • Production method of grade tin containing 99.99% of Sn
  • Production method of grade tin containing 99.99% of Sn
  • Production method of grade tin containing 99.99% of Sn

Examples

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Effect test

no. 1 example

[0027] Present embodiment is the first example of the production method containing Sn99.99% grade tin of the present invention, comprises the steps:

[0028] (1) Peritectic or metal compound removal: at a temperature of 250°C, gradually remove 1 ton of Sn99.92%, Fe0.005%, Cu0.0032%, Pb0.018%, Sb0.017%, As0.004%, Bi0.011%, S0.003%, Ag0.0005%, In0.018% Sn99.9% grade tin is added to the equipment, the tank size is Φ280mm×2000mm and there are 6 temperature control sections In the spiral blade crystallization equipment, the temperature of the six temperature sections of the crystallization equipment is controlled at the same time to be 180°C, 195°C, 205°C, 215°C, 225°C, and 235°C, and the rotation speed of the spiral blade shaft is 0.4n / min, so that the material is crystallized Continuous crystallization and melting are realized in the equipment. After 12 hours, at the outlet of the high temperature section of the crystallization equipment, the output contains Sn99.73%, Fe0.015%, C...

no. 2 example

[0031] Present embodiment is the second example of the production method containing Sn99.99% grade tin of the present invention, comprises the steps:

[0032] (1) Peritectic or metal compound removal: at a temperature of 270°C, gradually remove 9 tons of Sn99.93%, Fe0.006%, Cu0.0035%, Pb0.019%, Sb0.016%, As0.003%, Bi0.012%, S0.003%, Ag0.0005%, In0.0016% Sn99.9% grade tin is added to the equipment, the tank size is Φ650mm×6000mm and there are 6 temperature control sections In the spiral blade crystallization equipment, the temperature of the six temperature sections of the crystallization equipment is controlled at the same time to be 190°C, 200°C, 210°C, 220°C, 230°C, and 238°C, and the rotation speed of the spiral blade shaft is 0.35n / min, so that the material is crystallized Continuous crystallization and melting are realized in the equipment. After 16 hours, at the outlet of the high temperature section of the crystallization equipment, Sn99.76%, Fe0.017%, Cu0.011%, Pb0.003...

no. 3 example

[0035] Present embodiment is the 3rd example of the production method that contains Sn99.99% grade tin of the present invention, comprises the steps:

[0036] (1) Peritectic or metal compound removal: at a temperature of 300°C, gradually remove 12 tons of Sn99.96%, Fe0.004%, Cu0.002%, Pb0.010%, Sb0.010%, As0.002%, Bi0.008%, S0.002%, Ag0.0002%, In0.0018% Sn99.9% grade tin is added to the equipment, the tank size is Φ680mm×6400mm and there are 6 temperature control sections In the spiral blade crystallization equipment, the temperature of the six temperature sections of the crystallization equipment is controlled at the same time to be 195°C, 205°C, 215°C, 225°C, 235°C, and 240°C, and the rotation speed of the spiral blade shaft is 0.3n / min, so that the material is crystallized Continuous crystallization and melting are realized in the equipment. After 20 hours, at the outlet of the high temperature section of the crystallization equipment, the continuous output contains Sn99.88...

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Abstract

A production method of grade tin containing 99.99% of Sn comprises steps as follows: the grade tin containing 99.99% of Sn is added into helical blade crystallization equipment with six temperature control sections, and the temperature and the temperature gradient are controlled, so that a material can be continuously and repeatedly crystallized and smelt, and a tin alloy rich in arsenic, copper, ferrum, silicon, aluminum, magnesium, nickel, thallium and sulfur elements is produced at a high-temperature section outlet of the crystallization equipment; and then, the temperature and the temperature gradient of the inside of the crystallization equipment are changed, so that the material can be continuously crystallized and smelt, a tin alloy rich in silver, tin, lead, bismuth, cadmium and zinc elements is produced at a low-temperature section outlet of the equipment, and the grade tin containing 99.99% of Sn is obtained at the high-temperature section outlet of the crystallization equipment.

Description

technical field [0001] The invention relates to the field of production of high-grade nonferrous metal products, in particular to a production method of Sn99.99% grade tin. Background technique [0002] Containing Sn99.99% grade tin, also known as 49 tin, 4N tin or high-grade tin, the main component Sn≥99.990%, the main impurity components Fe≤0.0025%, Cu≤0.001%, Pb≤0.0035%, Sb≤0.0020%, As≤0.0007%, Bi≤0.0025%, S≤0.0005%, Ag≤0.0005%, In≤0.0025%. [0003] Containing Sn99.99% grade tin, mainly used for the preparation of high-grade lead-free solder, also widely used in the production of semiconductor compounds and superconductor alloys such as tin nitride, tin antimonide, tin arsenide, etc., as phosphors and high-grade ITO targets Raw materials, semiconductor dopants, semiconductor leads, etc. [0004] At present, there are mainly the following four production methods for Sn99.99% grade tin: [0005] 1. Electrolysis. Electrolytic purification mainly utilizes the potential di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B25/08C22B9/02
CPCY02P10/20
Inventor 陶政修陈光耀罗祥海潘久华蒋光佑刘波
Owner LAIBIN CHINA TIN SMELTING
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