Bactericidal material

FIELD: chemistry.

SUBSTANCE: set task is solved by application of final slag, formed in production of ferrovanadium by alumino-silicothermic method as bactericidal material.

EFFECT: extension of raw material resources for bactericidal materials.

1 tbl

 

The invention relates to sterilization of materials, in particular to chemical means of combating microorganisms.

Known bactericidal materials based on lime. Hydroxide (lime) is obtained by reaction with water of calcium oxide and is characterized disinfectant, antiparasitic and deodorizing effect.

Known decontamination reagent, described in the integrated processing and disposal of sewage sludge containing: clay 40,0-60,0 wt.%, lime 5.0 to 40.0 wt.%, cement 5.0 to 40.0 wt.%, the complexing agents selected from the range: a mixture of oxides of metals, ash, crushed slag, dolomite powder, ground limestone of 5.0-10.0 wt.% (see RF patent №2293070 from 10.02.2007,).

In the production of well-known material used components that are not waste.

The objective of the invention is the expansion of raw materials for bactericidal materials.

The problem is solved by the use of the final slag formed during the production of ferrovanadium, alumino-silicothermic way as bactericidal material.

The final slag formed during the production of ferrovanadium aluminosilicates way, is a fine powder.

Granulometric composition: fraction of not more than 2 mm 95,0%, particle size up to 300 mm and not more than 5.0%, moisture < 10,0%.

Has a color ranging from white, blue, olive to gray.

The content of vanadium, ferrosilicon in the metallic form is not more than 1 mass%. Consolidated chemical composition shown in the table.

The chemical composition of the slag
Mass fraction of oxides, %, max
SiO2Al2O3MgOCaOV2O5
30,010,08,56o,01,0

The predominant component in the slag is calcium oxide, which when mixed with water turns into hydroxide (lime).

New appointment metallurgical slag ferrovanadium production became possible due to the presence of calcium oxide with the reaction of water with antibacterial properties.

According to the passport of waste production slag ferrovanadium production is industrial waste hazard class IV, characterized by a content in water extract (1 l of water per 1 kg of waste) toxic substances below the level of the filtrate from the solid bytów the x waste and integral parameters biochemical oxygen demand (BOD20) and chemical oxygen demand (COD) is not higher than 300 mg/L.

Bactericidal material was obtained as follows.

In the production of ferrovanadium aluminosilicates way is formed the final slag. The slag after the end of the melt is poured into the slag carriage and taken to a processing plant, discharged in the form of a massive body. The slowly cooled slag on-site at ambient temperature (+40 to -30°C). When this occurs, the auto-decomposition of the slag particle formation from 0.01 to 2 mm, Then produce screening slag, this removes the fraction of slag over 250 mm, which is directed to crushing in a jaw crusher to the size of less than 250 mm In the total mass of the feedstock fraction, which must undergo fragmentation is not more than 3%. Material that meets granulometric composition undergoes magnetic separation, to remove metallic inclusion and ferrosilicon ferrovanadium. Mechanical action does not change the chemical composition of slag.

For the received material by the method of MU 2.1.674-97 "Sanitary-hygienic evaluation of building materials with the addition of industrial waste" studies have been conducted in relation to it to pathogenic and conditionally pathogenic microflora.

The results of the EC is periment showed the microbial growth was absent. This means that the material possesses bactericidal properties against the bacteria Escherichia coli, which can be recommended as a bactericide.

The advantage of the invention is that it allows you to expand resources for bactericidal materials and to dispose of waste metallurgical plant.

The use of the final slag formed during the production of ferrovanadium aluminosilicates way as bactericidal material.



 

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