SU1325016A1 - Method of producing zink aluminate - Google Patents

Abstract

This invention relates to non-ferrous metallurgy and can be used in the production of zinc aluminate. The purpose of the invention is to cheapen the process while maintaining the quality of the product. For zinksoderzhapshe waste leached. After alkaline, the insoluble carbon residue is filtered off. Waste of aluminum laminated foil is added to the resulting solution. The ratio of aluminum in foil to zinc in the solution is maintained at 1: (1.2-5.0J. The mixture is stirred at 60-90 ° C. This dissolves aluminum and copper precipitates. A mixture of zinc and aluminum hydroxides is precipitated from the solution. It is washed, dried and calcined. This method of obtaining zinc aluminate reduces the cost of the process of eliminating environmental pollution by processing waste into the desired product. Table 2 (L

Description

 13

The invention relates to non-ferrous metallurgy and can be used in the production of zinc aluminate.

The purpose of the invention is to reduce the cost of the process while maintaining the quality of the product.

Example 1. 200 g of zinc-containing dusting composition, wt.% Zn 70.0-75.0; Si 3.0-6.0; carbon is the rest, add 800 g of water and mix until a homogeneous mixture is obtained. After that, sulfuric acid with a concentration of 94% in an amount of 900 g is added to the pulp. Dust leaching is carried out for 0.5 to 0 hours. After leaching, the insoluble carbon residue is filtered off. Waste aluminum kaoirirovannogo foil with a particle size of less than 2 cm in the amount of 250 g is added to the solution. At that, the ratio of aluminum in foil to zinc in solution is 1: 1.2. The mixture is stirred. When this occurs, the dissolution of aluminum and the deposition of copper from the solution.

Table 1 shows the results of zinc-containing treatment; Waste with aluminum foil waste at different temperatures and different times.

Processing aluminum waste at a Hirate temperature does not allow the removal of copper impurities, which affects the quality of the target product.

Next, a mixture of zinc and aluminum hydroxides with a 20% ammonia solution is precipitated from a solution of zinc and aluminum salts, the precipitate is washed, dried and calcined at.

EXAMPLE 2. Zinc aluminate is obtained from zinc-containing aluminum and containing mercury of the same composition as in Example 1.

1000 g of a 35% sodium hydroxide solution is poured into the reactor, 200 g of zinc dust are added and dissolved with stirring for 1.5 hours. After that, the pulp is filtered and the laminated aluminum foil is added to the sodium zinc solution. in the amount of 80 g. The ratio of aluminum to zinc is 1: 3.5.

The mixture is vigorously stirred at 20, 40,60,80,90 ° C for 10-120 mi

Table 2 shows the results of determining the residual copper content in the aluminate and zincate solution.

5 0 5

0

five

five

0

five

162

Sodium on time at different temperatures.

At the temperature of the solution, the solution of sodium aluminate and sodium zincate does not contain copper at about 1 hour after 60 days after the start of treatment with aluminum waste.

After completion of the process, the pulp is filtered off and 4200 g of 10% sulfuric acid solution is added to the filtrate. At the same time, zinc and aluminum hydroxides precipitate out. The precipitate is separated from the mother liquor, washed, dried and calcined at.

Example 3. To obtain zinc aluminate, zinc-containing dust lugs are used, having a composition, in percent by weight, calculated on a metal basis:

Zinc 25.0

Mel1.0

Cadmium 0.6

Lead 25.0

200 g of dust plugs are loaded into the reactor, 800 ml of water are added and stirred. Thereafter, 94% of the acid is added to the lulpa in an amount of 225 g. After the impregnation, the solution is separated from the undissolved lead sulfate. The solution is treated with aluminum laminated foil in an amount of 85 g at. The ratio of aluminum in foil to zinc in a solution of 1: 1.2. Next, from the solution get zinc aluminate in example 1.

With a ratio of metallic aluminum in the foil to zinc in a solution of 1.1: 5.5, zinc aluminate does not meet the technical conditions for the permissible content of kiglotresoluble substances, since the content of the latter in zinc aluminate is 8.23 and 9.09, respectively. %

The optimum ratio of aluminum foil to zinc in a solution is 1.2: 5.0. The content of substances in zinc aluminate, soluble in zinc aluminate 0.81-1, 23%.

This method of producing zinc aluminate provides in comparison with the known methods the cheapening of the method.

due to the use of zinc-containing and aluminum-containing waste instead of pure reactive salts, without compromising the quality of the final product, which is explained by the absence of impurities in the zinc-aluminum solution, the elimination of environmental pollution due to the processing of waste into the final product.

3I3250I64

Formula for nzvideteki zhest quality; The content of the material is: they use waste products,

The method of producing zinc aluminate, as an aluminin-containing material, including mixing inox-containing ala, wastes of aluminum laminating material with aluminum-containing foil, before mixing zinc with material, the coprecipitation of the solution containing wastes is leached, and the resulting solution is mixed with wastes of aluminum laminated foil temperature 60-90 ° C and a mass W ratio of aluminum to zinc, equal to 1 :( I, 2-5.0).

Table 1

zinc and aluminum hydroxides, the separation of the precipitate and its heat treatment, characterized in that, in order to reduce the cost of the process while maintaining the quality of the product, in ca3015 / 21

Circulation 455 Subscription

VNSh1PI State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

Claims (1)

Claim A method of producing zinc aluminate, including mixing zinc-containing material with aluminum-containing material, coprecipitation from a solution of zinc and aluminum hydroxides, separating the precipitate and its heat treatment, characterized in that, in order to reduce the cost of the process while maintaining the quality of the product, as a zinc-based material they use zinc-containing waste, and as an aluminum-containing material · ala — waste of aluminum clad foil, before mixing zinc-containing waste is leached and the resulting solution is mixed ayut waste cached aluminum foil at a temperature of 60-90. ° C and a weight 10 ratio of aluminum to zinc, equal to 1: (I, 2-5.0). Table 1 Process temperature ° C Working time, min P 90 J 120 [150 Y 300 The residual copper content, g / l 20 13.8 13.1 13.1 12.0 11,4 1 1, 0 40 4.0 3,1 1,2 0.7 0.4 0.2 60 0.7 0.1 Traces Not Not Not 80 Not Not Not 90 - - ⁿ - table 2 -------------------------------------------------- -------- Temperature Processing time for aluminum waste, min. Process, ° C. - The concentration of copper in the sample, g / l 20 0.8 0.8 0.7 0.6 0.4 40 0.7 0.5 0.1. Traces Traces 60 0.4 0.1 Traces Not Not 80 Not Not Not - __ 90 _ ¹ '-