Alloying elements in mineral and synthetic components of welding materials

Adkina, Yu. V.; Nikolaev, A. I.; Petrov, Valeriy; Putintsev, N. M.

doi:10.1134/s1070427210120049

Cited by 3 publications

(2 citation statements)

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“…Meanwhile, in many publications [ 10 , 11 , 12 , 13 ] it has been shown that the use of sphene concentrate is of scientific and practical interest for obtaining materials that contain little functional titanium, such as non-toxic tanning agents, as well as nanodispersed titanium dioxide, which can be used for various purposes, including in thermoregulated insulating materials, synthetic sorbents, pearlescent pigments, and photocatalytic catalysts. These materials are used in industrial areas for the manufacturing of products for civil and defense purposes.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Sorption Materials from Low Grade Titanium Raw Materials

2022

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In this paper, a universal technology is proposed for processing low-titanium mineral raw material—apatite-nepheline ore waste, including its treatment with sulfuric or hydrochloric acid in a two-stage mode with a sequential increase in the concentration. This technique allowed us to remove nepheline and apatite in the first stage and achieve a titanium mineral content of TiO2 of more than 30%; in the second stage, we were able to convert the titanium into its precursors—titanyl sulfate monohydrate TiOSO4·H2O and a hybrid rutile-silica composition. The key stage in the sorbent synthesis is the reaction of the precursor with a phosphoric acid solution. The preferred sequence of operations begins with the mechanical activation of the precursor, causing morphological changes in it, and subsequent treatment with phosphoric acid at different concentrations under atmospheric conditions and in an autoclave, accompanied by phase transformations. Conditions for the chemical reactions which regulated the composition and structure of the final product and, accordingly, its sorption activity were found. With the help of XFA, the phase compositions of the sorbents were identified, including the individual crystalline phase α-TiP obtained from TS or the crystalline phase αTi(HPO4)2∙H2O, which is in an amorphous silica matrix obtained from a rutile–silica composition.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Sorption Materials from Low Grade Titanium Raw Materials

2022

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“…From mica, products are made such as mica paper, mica plastics, mica tapes, mica electric heating elements, and other products for the electrical industry [ 2 , 3 , 4 , 5 , 6 ]. Finely ground mica is added to the coatings of welding electrodes [ 7 ]. Specially prepared mica particles are used as carriers for the functional active additives.…”

Section: Introductionmentioning

confidence: 99%

Mineral Layer Fillers for the Production of Functional Materials

2021

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An original method based on the use of technogenic waste from the processing of mineral-layered materials, in particular phlogopite for obtaining highly efficient functional compositions of the “mica-TiO2”, has been developed. The composition core is a nanosized mica flake coated with mesoporous titanium dioxide of an anatase or rutile structure. Energy-saving and environmentally friendly technological methods are based on the splitting of the mica followed by heterogeneous electrohydrolysis of a mixture of titanium (IV) sulfate solution and flake particles. No destruction of the mica surface, which provided the obtained uniform coatings, has been observed. Such coatings are used in photocatalysis processes and possess a self-cleaning capability. Core–shell compositions are more economically attractive compared with titanium dioxide, in particular TiO2 grade P25 (Degusse). The core of the transparent flake and the shell of the rutile titanium dioxide endows the final product with a pearlescent optical effect. This type of material is widely used in the manufacturing of paints and varnishes, printing inks, cosmetics, etc. The use of technogenic waste could significantly reduce the cost of the final product, which would ensure its widespread use in various industries.

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