Method for producing sodium stannate by using tin and tin alloy

A technology for producing sodium stannate and tin alloys, which is applied in the fields of tin compounds, chemical instruments and methods, and inorganic chemistry. It can solve the problems of unusable tin alloys, waste of resources and environment, and low tin content, so as to shorten the concentration time, High product quality, the effect of high product quality

Inactive Publication Date: 2009-09-30
上饶旭日冶炼厂
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  • Abstract
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Problems solved by technology

There are also some new technologies now such as the patent application number announced by the Chinese Patent Office on November 19, 1986. The patent application number is 85104036 and the title of invention is "The Production Method of Directly Producing Sodium Stannate from Tin Concentrate", which discloses a production method of sodium stannate , the raw material used in this invention is refined tin ore, and the use of refined tin ore will reduce the technological process and reduce the production cost rise compared with tin, but the raw material refined tin ore used is the refined tin ore with a tin content as high as more than 60%. , but this invention is still unavailable for tin alloys with a tin content of about 5% or more
my country is a big producer and user of non-ferrous metals. A large amount of tin alloys with low tin content are produced every year in production and use. If they cannot be effectively used, it will not only waste a lot of precious resources but also cause environmental pollution.

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  • Method for producing sodium stannate by using tin and tin alloy

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Embodiment Construction

[0013] refer to figure 1 , figure 1 It is a schematic process flow diagram of an embodiment of a method for producing sodium stannate by using tin and tin alloys provided by the present invention: the chemical composition is: Pb30%, Sb10%, Sn36%, Si15%, Ag2500g / t, Au20g / t t, Cu9% tin alloy 1 is put into the cast iron pot reactor 4, gradually add sodium nitrate 3, sodium hydroxide 2 and the tin alloy 1 that have been melted to carry out chemical reaction in the cast iron pot reactor 4, stir during the reaction The thick sodium stannate 5 that generates is floated to the top of the cast iron pot reactor 4. The thick sodium stannate 5 is pulled out from the top of the cast iron pot reactor 4, and other metals left in the cast iron pot reactor 4 are flowed out for refining other metal materials; the thick stannic acid taken out from the cast iron pot reactor 4 Sodium 5 is placed in the grinding drum 6 and water 7 is added for grinding, and the crude sodium stannate 5 is dissolve...

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Abstract

The invention discloses a method for producing sodium stannate by using tin and tin alloy, which comprises the following steps: (1) the tin and the tin alloy have chemical reaction with sodium hydroxide and oxidizer at a temperature of between 300 and 550 DEG C to obtain granular coarse sodium stannate; the reaction course comprises that the sodium hydroxide and the oxidizer are added to molten tin and tin alloy step by step until the reaction is completely finished; (2) the granular coarse sodium stannate is dissolved in water; (3) the solution is purified finely; and (4) the fully purified sodium stannate solution is condensed, separated and dried to obtain finished products. The method is used for producing the sodium stannate by using the tin and the tin alloy.

Description

technical field [0001] The invention relates to a method for producing inorganic salts, in particular to a method for producing sodium stannate by using tin and tin alloys. technical background [0002] At present, the production of sodium stannate at home and abroad is based on refined tin as raw material to produce tin salt. When tin is used as raw material to produce sodium stannate, since the melting point of tin is low and the specific gravity is larger than that of alkali, the tin sinks in the pot at the beginning of the reaction. , It is not conducive to the reaction, so that the conversion rate of tin is low, generally only 40-70%. In order to make the reaction go smoothly, the tin flower must be made into tin flower first, and then the tin flower is used to react with sodium hydroxide. Since the chemical reaction is carried out in a solution, the resulting product has a low concentration and must be concentrated to produce a finished product. In addition, when the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/00
Inventor 李震彬
Owner 上饶旭日冶炼厂
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