A method, product and application for preparing red iron oxide by utilizing titanium dioxide by-product ferrous sulfate

A technology of ferrous sulfate and red iron oxide, applied in the directions of iron sulfate, iron oxide, iron oxide/iron hydroxide, etc., can solve the problem of limited use range of iron oxide red, achieve good consistency, easy filtration and washing, high purity effect

Active Publication Date: 2022-07-19
SINOSTEEL NANJING NEW MATERIALS RES INST CO LTD +1
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  • Abstract
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Problems solved by technology

[0010] Aiming at the problem that the existing process of using titanium dioxide by-product ferrous sulfate to prepare iron oxide red cannot deeply remove silicon, which leads to the limited application range of iron oxide red, the present invention provides a method for preparing iron oxide red by using titanium white by-product ferrous sulfate method, can achieve the content of silica in iron oxide red ≤0.008%

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  • A method, product and application for preparing red iron oxide by utilizing titanium dioxide by-product ferrous sulfate
  • A method, product and application for preparing red iron oxide by utilizing titanium dioxide by-product ferrous sulfate
  • A method, product and application for preparing red iron oxide by utilizing titanium dioxide by-product ferrous sulfate

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Embodiment 1

[0058] The flow chart as shown in the figure, the method that utilizes titanium dioxide by-product ferrous sulfate to prepare iron oxide red in this implementation:

[0059] (1) Purification and impurity removal: the titanium dioxide by-product ferrous sulfate is dissolved in water under stirring, the reaction temperature is controlled at 50 ° C, and 5 mol / L ammonia water is added to make the pH value of the system 4.5; then 0.2 mol / L sulfuric acid is added. ammonium, stir for 15 minutes; filter and wash to obtain a preliminary purified ferrous sulfate solution; add a silicon remover to the preliminary purified ferrous sulfate solution, and polymerize ferric sulfate, cationic guar gum, and sodium alginate in water in the silicon remover The mass percentage content of 5000ppm, 500ppm and 120ppm respectively; control the temperature of the system at 50°C, add 5mol / L ammonia water and make the pH of the system 5.0, stir for 20 minutes, let stand for 6 hours, and filter to obtain F...

Embodiment 2

[0063] The titanium dioxide by-product ferrous sulfate used in this example is the same as in Example 1.

[0064] The method of utilizing titanium dioxide by-product ferrous sulfate to prepare iron oxide red in the present implementation: (1) purification and impurity removal: dissolving titanium dioxide by-product ferrous sulfate in water under stirring, controlling the reaction temperature to 30 ° C, adding 5mol / L of sodium hydroxide solution to make the pH value of the system 5.0; then add 0.2mol / L sodium sulfide, stir for 15 minutes; filter and wash to obtain a preliminary purified ferrous sulfate solution; add to the preliminary purified ferrous sulfate solution Silicone agent, the mass percentage content of polymerized ferric sulfate, cationic guar gum, and sodium alginate in water are respectively 2000ppm, 500ppm and 550ppm in the silicon remover; Make the pH of the system 5.0, stir for 20 minutes, let stand for 10 hours, and filter to obtain Fe after deep desiliconiza...

Embodiment 3

[0068] The titanium dioxide by-product ferrous sulfate used in this example is the same as in Example 1.

[0069]The method for preparing iron oxide red by utilizing titanium dioxide by-product ferrous sulfate in this implementation: (1) purification and impurity removal: dissolving titanium dioxide by-product ferrous sulfate in water under stirring, controlling the reaction temperature to 50 ° C, adding 2mol / L of sodium hydroxide solution to make the pH value of the system 4.0; then add 0.4mol / L sodium sulfide, stir for 20 minutes; filter and wash to obtain a preliminary purified ferrous sulfate solution; add to the preliminary purified ferrous sulfate solution Silicone agent, the mass percentage content of polymerized ferric sulfate, cationic guar gum, and sodium alginate in water are 8000ppm, 2000ppm and 1000ppm respectively in the silicon remover; Make the pH of the system 5.0, stir for 20 minutes, let stand for 12 hours, and filter to obtain Fe after deep desiliconizatio...

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Abstract

The invention discloses a method, product and application for preparing red iron oxide by utilizing titanium dioxide by-product ferrous sulfate, and belongs to the technical field of magnetic materials. The method includes the following steps: step S101, purifying and removing impurities; step S102, oxidative synthesis; step S103, roasting, pulverizing, and sieving, wherein the silicon removing agent used in the purification and removal of impurities is polymeric ferric sulfate, cationic guar gum, Compound of sodium alginate. Through the reasonable compatibility of various inorganic and organic macromolecular polymers, the invention gives full play to the coagulation and precipitation effect, electric neutralization ability and adsorption bridge function of the silicon remover, effectively removes the impurity silicon in the ferrous sulfate, and removes the impurity silicon in the ferrous sulfate effectively. During the oxidative synthesis process, the feeding speed of the ferrous sulfate solution and the alkali solution was precisely controlled, and the hydrated iron oxide precipitate with good consistency, easy filtration and washing, and high activity was obtained. Iron oxide red product with good performance.

Description

technical field [0001] The invention belongs to the technical field of magnetic materials, and more particularly relates to a method and a product for preparing red iron oxide by utilizing titanium dioxide by-product ferrous sulfate, and the red iron oxide is suitable for high-performance soft ferrite. Background technique [0002] Soft ferrite magnetic material has the functions of power conversion, signal processing, anti-electromagnetic interference, new energy inverter, etc. It has been widely used in wireless communication, automatic control, 3C electronics, wireless charging, new energy vehicles, energy storage, medical treatment, etc. field, and the main raw material for the production of soft ferrite magnetic materials is Fe 2 O 3 (about 70%), that is, red iron oxide, so the quality of red iron oxide directly affects the performance of the soft ferrite magnetic material. [0003] At present, the main source of iron oxide red for soft ferrite magnetic materials is o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/06C01G49/14H01F1/34H01F41/02
CPCC01G49/06C01G49/14H01F1/344H01F41/02C01P2006/80
Inventor 钱有军裴晓东骆艳华李晓祥李涛刘晨李昕徐春宇
Owner SINOSTEEL NANJING NEW MATERIALS RES INST CO LTD
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