SU1435541A1 - Method of producing white arsenic - Google Patents

Abstract

The invention relates to the field of chemical technology, in particular, to methods for producing white (Liquor, Mouse, x-containing o.d. C (4-b): 1, is placed in a tubular furnace and air is passed at a temperature of through the mixture at a rate that ensures the mass ratio of oxygen and white mouse

Description

 ate

4ib

The invention relates to the field of processing mouse-containing (As,) waste, mainly formed during the processing of non-ferrous metal ores.

The aim of the invention is to increase the yield of the product while maintaining a high content of the basic substance in it.

In the process of preparing copper ores to enrich j, for example, tin ores, wastes are formed that contain 40–70 wt.% Of white ore. Despite the fact that this waste also contains a significant amount of useful metals, the extraction of the latter from waste is impossible due to the high content of mines in them. To ensure the extraction of non-ferrous metals from these wastes, they are subjected to pretreatment to reduce the content of the mouse to 3 wt.% In terms of white square meters. The pretreatment is that the waste is mixed with carbon at a mass of White material and carbon 4-6: 15 then bake the mixture at 700 ° C in the presence of oxygen, a pair of white condensate. The mass ratio of oxygen and white mouse material during roasting of the podsergy is 1.25-1.30: 1.

The chemical mechanism of the process is as follows:

2 C (.L

ABOUT.

2 WITH

2 AsjOjjTi AsiOjf, CO, + C,

+ 5C

(Y)

As

(G}

+ 5 CO.

+ С (, -, t СО

2 WITH

 I L (T)

Deeper removal of the mouse from the waste during the recovery of burning is provided by the creation of a regenerating environment in the gas phase, which will prevent the re-oxidation of ASrJO, c. At the same time, the diffusion of carbon monoxide in-: particles of waste containing waste is much faster, and this creates the possibility of more complete recovery of the mouse;

As.

2) + 10 CO --- la (p). . v. (T) 2 CO-Az203 (g) 2 Cd 55

Formed. in the process of reduction, the metal .mude is oxidized by oxygen in the gas

phase in the presence of carbon monoxide of up-white mth ka:

0

five

0

five

0

five

0

Az,

-t- 3 0 - 2, (r,

5 Q

five

4 (P

Example 1, 100 g of cinders obtained after the refining of tin-containing tin production wastes and a content of 17.8% of the mouse in terms of, are mixed with 4545g of carbon (mass ratio A.: C 4g1),. placed in a tubular bake and at 700 ° C, air is passed through the mixture at a rate of 19.5 l / h for 4 hours corresponding to an oxygen mass ratio of 1.25: 1; After condensation of vapors, 15.6 g of product containing 99.72% is obtained white mouse; - product yield 87.5% of the initial amount.

PRI me R 2 100 g of cinder according to example 1 is mixed with 3.0 g of carbon (mass ratio: C 6: 1), placed in a tubular furnace and, with air flowing through the mixture at a speed of 1955 l / h for 4 h (mass ratio of acid - genus: material 1.25: 1). After condensation of vapors, AS2.05 is obtained. 15.24 g of product containing 99.53% white mouse. The product yield is 85j6% of the initial quantity.

Approx er 3, 100 g of butterflies according to example 1 are mixed with 3.6 g of carbon (mass ratio А2.0э: -С, 5: 1), placed in a tubular furnace and air (19.5 l / h) is passed through the mixture for 4 h After condensation of ASjO vapor, 15.40 g of product containing 99.60% white pulp is obtained. The product yield of 86.20% of the initial amount of As, 0 J.

Approx. 4. 100 g of cinders in example 1 are mixed with 4.45 g of carbon, placed in a tube furnace, and at 700 ° C passed through the mixture. (20 l / h) air for 4 h (mass ratio of oxygen: material 1.30: 1). After vapor condensation, 15.64 g of product are obtained. 99.70%. The product yield of 87.6% of the initial amount,

In tab. 1 shows the dependence of the product yield and the content of basic3143

of the substance in it from the mass ratio of white mouse and carbon.

From Table 1, it follows that a decrease in the mass ratio of white mish and carbon (below 4.0: 1) leads to a decrease in the content of the main substance in the product to a level lower than in the known method (99.5%), and an increase in this ratio (above 6.0: 1) leads to both a decrease in the content of the main substance in the product, and a sharp decrease in the product yield.

Table 2 shows the dependence of the product yield and the content of the main substance in it on the mass ratio of oxygen and white milk.

From tab. 2, it follows that a decrease in the mass ratio of oxygen to 6ejforo and lower (below 1.25: 1) leads to a decrease in the yield of the product, and an increase (more than 1.30: 1) is impractical, since not only did not result

This leads to a further increase in the yield of the product, but also somewhat reduces it. The invention allows to increase the yield of the product from 76.6 to 85.6-87.5% with the content of the basic substance in the product 99.53-99.72%.

Claims (1)

Invention Formula The method of obtaining white powder, which includes mixing of the x-containing material with carbon, burning the charge at 700 ° C in the presence of air oxygen, followed by condensation of the product, characterized in that, in order to increase the product yield while maintaining a high content of the main substance It is mixed at a mass ratio of white arsenic material and carbon 4-6: 1, and firing is carried out at a mass ratio of oxygen and white arsenic material 1.25-1.30: 1. 1.1: 181.73.8199.6P 1.25: 187.52,6399,72 Table 1 Table 2 1435541 i Continuation of table 2 1.30: 87-, 6 2.62 99.70 1.40: 1 85.2 3.10 99.51