CN-108238781-B chemical patent summary.

In this study, kaolin was used for removing Iron and Manganese from aqueous solutions in some wells in Egypt and increasing of its efficiency to remove heavy metals by applying adsorption on raw washed kaolin and its acid activated forms by using sulfuric and acetic acids. In order to determine the reaction of Iron and

Kaolin waste dumps contain a huge volume of material that cannot be commercialized due to the presence of variable amounts of iron minerals, which impart a yellowish color to the kaolin. Elimination of iron from kaolin using either a chemical or a biological method was the aim of this study. The chemical leaching of iron from kaolin …

The main factor is that the raw material can be yellowed or brick red, so the kaolin must be whitened in addition to iron. The form of iron in kaolin. In order to effectively remove iron, research on its occurrence state is also essential. According to the crystalline state of iron, it can be divided into two forms: crystalline and amorphous.

The invention relates to a technique for efficiently removing iron from kaolin by magnetic separation, which is characterized by comprising the following steps: (1) purifying kaolin …

Excluding iron and whitening is an important means to improve the value and application effect of kaolin. Natural kaolin often reduces its whiteness due to various …

The oxidative bleaching iron removal method is mainly used to treat pyrite-type kaolin. It is difficult to bleach the pyrite in the kaolin ore by the recovery bleaching method or the pickling method. Oxidative bleaching method uses strong oxidants as bleaching agents to oxidize pyrite in kaolin to form soluble Fe2+ in the kaolin pulp system.

Iron is the main impurity ore for purification and whitening of kaolin. Its occurrence state is diverse, often in the form of hematite, pyrite, siderite, limonite, anatase, ilmenite and other minerals, and sometimes contains mica, tourmaline, etc. Therefore, iron removal is the main measure for kaolin whitening. You will learn from the following common kaolin …

A Simple Method Of Removing Iron From Kaolin. Nov 12, 2019 It contains not less quantitative ferroferric oxide, ferric oxide and iron. Magnetic minerals such as silicates, so kaolin should be subjected to iron removal. According to the difference in the composition and proportion of magnetic minerals, different magnetic separation processes are …

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A complex technology of the biochemical method of removing iron from kaolin was proposed. It includes a number of basic treatment operations and regimes: wet grinding kaolin; magnetic separation of a suspension prior to biotreatment of kaolin; changing the water regime from stagnant (storage of the suspension) to washing with an …

At present, the chemical iron removal methods commonly used in kaolin include oxidation method, restoration method and Chineseization-restoration combined method, among which the restoration method is the most widely used. Which method is used in detail depends on the type of iron ore contained in kaolin. (1) Oxidative iron …

There are many methods for removing iron from kaolin, which are mainly divided into physical method, chemical method and microbial method. Physical …

kaolin quartz removing iron industrial interest mineral concentrates Prior art date Application number DK91116693.2T Other languages Danish (da) Inventor Luigi Toro …

Kaolin Chemical Iron Removal Method (1) Oxidation method. The oxidation method is to oxidize the iron impurities in the reduced state into water-soluble... (2) …

The harmful impurities in kaolin are mainly iron, organic matter, dark minerals (such as chlorite, biotite, etc.) and titanium-containing minerals, of which iron affects the whiteness of kaolin. The main factor is that the raw material can be yellowed or brick red, so the kaolin must be whitened in addition to iron.

The invention relates to a technique for efficiently removing iron from kaolin by magnetic separation, which is characterized by comprising the following steps: (1) purifying kaolin raw ore to obtain a magnetic separation raw material; (2) adding water to the magnetic separation raw material obtained in the step (1) to prepare a mixed slurry with the solid …

By this method it was possible to obtain iron extraction percentages over 80% and whiteness index above to 90%. ... The removal of iron from kaolin of industrial interest by acid leaching under ...

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The use of Möss spectroscopy to explain the removal of iron compounds from kaolin with different structural organization showed that it is more …

Guide Iron is the primary dyeing element of kaolin. Iron-bearing mineral deposits will turn into Fe2O3 when calcined at high temperature, which makes the kaolin mineral yellow or brick red. In order to efficiently remove iron-containing impurities in kaolin ore, it is necessary to know the occurrence status of iron-containing impurities in kaolin …

Iron removal from kaolin using thiourea assisted by ultrasonic wave Guang-hua Xiaa,b,⇑, Mang Lua, Xiao-li Sua, Xiao-dong Zhaoa a School of Materials Science and Engineering, Jingdezhen Ceramic ...

Choice of Technological Scheme for Removing Iron from CM. There are three methods for removing iron: physical, chemical and biochemical, the latter being …

Applicable range: rough selection and selection of hematite, limonite and siderite; rough selection and selection of ilmenite, ferromanganese and chromite; selection of …

The reasons for the inefficacy of iron removal from Zhuravlinyi Log kaolin by dry grading into fractions method are analyzed. A biochemical kaolin-enrichment technology is proposed. Different process regimes and treatment conditions boosting iron reduction and removal from kaolin are studied.

Kaolin is an important new type of natural energy, kaolin has been widely used in ceramic paper industry, occupying an increasingly important position. It can not only improve the quality of paper and increase the added value of products, but also meet the requirements of high-quality paper and spec