SU1518401A1 - Method of processing manganese-containing initial oxide material - Google Patents

Abstract

The invention relates to hydrometallurgy. The goal is to increase the specific productivity of the process by increasing the filtration rate of chemical enrichment tails. After leaching the raw material in a solution of sulfuric acid in the presence of iron and manganese-containing reducing agent, before the precipitation of impurities, the leached suspension is stirred for 2.5-3.0 hours. The process time has decreased from 8.7 to 4.8 hours. 2 table.

Description

The invention relates to hydrometallurgy, in particular to the preparation of manganese sulphate solutions for the precipitation of high-quality manganese-containing products from them, and can be used in the joint processing of manganese oxide raw materials and waste of ferroalloy production (associated metal).

The purpose of the invention is to increase the specific productivity of the process by increasing the filtration rate of chemical enrichment tailings.

Example .. A wad of manganese sludge (SO) g with a manganese content of 18.65%, ground to a particle size of -0.16 mm, is diluted with water to a solid content of 250 kg / m. 78.7 g of sulfuric acid in terms of monohydrate are fed to the resulting suspension. Then, as a reducing agent, the associated metal weighing 16.9 g, previously crushed to a particle size of -0.074 mm, is introduced into the suspension;

52.5% Mn and 39.2% Fe. Leaching Lead to pH 1.8-2.0 for 10 min. The leached suspension is stirred for h, and then the pH is adjusted to 4.5 with lime milk. Chemical enrichment tails are filtered on a Büchner funnel for 7.3 minutes. From a purified solution of manganese sulphate using a sodium hydroxide precipitates a chemical concentrate containing

margash; a, 8%. The output of the concentrate is 37.9%.

In tab. and 2 shows the specific loads during the filtration of chemical enrichment tails and the total processing time of the suspension (specific productivity of the process) depending on the mixing time of the oleaginous pulp.

From table 1 it follows that the optimal time for mixing the suspension

Before the precipitation of harmful impurities, the interval is 2.5-3.0 hours.

A method of processing manganese oxide raw materials, including the preparation of a suspension, the supply of sulfuric acid and a metal reducing agent containing manganese and iron, leaching and precipitation of impurities with an alkaline agent, filtering the surface of the chemical treatment of the chemical tailings | In the proposed method, it is 3.5–4.0 times higher than the known value of specific oni pysKe and filtering time and the total total processing time of the sludge (removal from a purified manganese solution alkalization, mixing and filtering products, differing from-: understating) is 1.5-2.0 times less, that is, with the aim of increasing 3 1.5-2.6 times the specific production -the specific process productivity: the process architecture. Moreover, by increasing the rate of the filter by improving the filterability of the tailings of chemical enrichment, tails by 1, 2%. the extract-leached suspension increases before precipitating manganese into a chemical concentration of impurities is mixed: - 2.5–3.0 h.

20 table

Indicators. Time of mixing, h

..

Specific load, 1.2 4.3 8.7 10.2 13.1 21.0 24.2 24.2 24.2 Total time of leaching, mixing and filtering, h, 8.7 8.5 8, 4 7.2 5.7 4.8 4.8 5.4 5.9

Table 2 t- Method / L,%,%,% Specific on-time vre- Vremy Vremenno- Vremenennost load, kg / mch slylachivayt filters leaching costs, nor, change, chichiv, rub / t

mixing, filtering, h

Known 61.2 37.3 92.4 6.2-6.50.5-0.8 7.4-7.8 7.9-8.6280.2

Offered61, 8 ЗТ, 9 93.6 22.3-24.2 3.0-3.3 1.8-2.2 4.8-5-, 5271.3

Note: ft, f, Y Mn content, yield and total extraction of manganese from the associated metal and sludge, respectively.

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VNYUSHI of the State Committee on Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, F-33, 4/5, Raushsk nab.

Claims (1)

Invention Formula A method of processing manganese oxide raw materials, including preparing a suspension, feeding it with sulfuric acid and metal reducing agents, chemical enrichment and obtaining from a purified solution of manganese products, in order to increase the specific productivity of the process by increasing the speed of the filter neither the tailings of chemical enrichment, the leached suspension before the precipitation of impurities is subjected to stirring for 2.5-3.0 hours. manganese and iron containing bodies, leaching and precipitation of impurities with an alkaline agent, filtering chemical tailings and obtaining manganese products from the purified solution, in order to increase the specific productivity of the process by increasing the filtration rate tailings of chemical enrichment, leached suspension before precipitation of impurities is subjected to stirring for 2.5-3.0 hours.