KR20050055659A - Manufacturing method for pellet of ferrous-ferric salts - Google Patents

Abstract

An object of the present invention is to provide a pellet production method of magnetized divalent trivalent iron salt used in a treatment step of drinking water, a microbial culture step, a wastewater treatment step, and a deodorization step.

To this end, the present invention, while heating the aqueous solution mixed with ferric salts and ferric salts in the range of 80 ~ 100 ℃ under a magnetic field (Alkali) is injected to adjust the pH to 8 to 11 black magnetic iron oxide When magnetite (Fe ₃ O ₄ ) is produced, it is precipitated, filtered or dehydrated, dried and then magnetized in a magnetizer.

In order to produce magnetite with higher coercive force, the above-described magnetite is converted to gamma ferric oxide (γ-Fe ₂ O ₃ ), and then dissolved in a concentrated hydrochloric acid (Conc-HCl) aqueous solution. Mix and inject alkali while heating to 80 ~ 100 ℃ to adjust pH to 12 ~ 14. When magnetite of black iron tetraoxide (Fe ₃ O ₄ ) is produced, precipitate, filter or dehydrate, dry and attach Magnetize the magnetism

The magnetized magnetite is dissolved in hydrochloric acid, and reacted with Fulvic acid, which forms a complex salt, to prepare a divalent trivalent iron solution.

After mixing dihydric trivalent iron salts with mineral powders containing humus and useful minerals, they are aged for 1 to 24 months, and then mixed and stirred with sodium alginate as a binder. Pellet of divalent trivalent iron salt is prepared by heat-drying after processing in the form of pellet).

[Index]

Magnetic Iron Oxide, Mineral Salts, Magnetite, Gamma Ferric Oxide (γ-Fe ₂ O ₃ ), Magnetizing, Complexing Salt, Pellet

Description

Manufacturing method for pellet of ferrous-ferric salts

The present invention is a mixture of ferric salts and trivalent salts of mineral salts containing magnetized dihydric triiron salt used in the treatment process of drinking water, microbial culture process, sewage and waste water treatment process, deodorization treatment process 80 ~ Alkali was injected while heating to 100 ° C. to adjust the pH to 12 to 14 to produce black magnetic magnetite (Fe ₃ O ₄ ), followed by magnetization by magnetization, followed by hydrochloric acid solution. After dissolving, react the fulvic acid (Fulvic acid) to make a divalent trivalent ferrous salt solution, and after mixing the soil and mineral powder with them, aged for 1 to 24 months and then processed into pellets (Pellet) form The present invention relates to a process for preparing pellets of divalent-valent iron salt by heating-drying.

In the Kago Recessed Wetlands, located northwest of the Unzen volcanoes in Nagasaki Prefecture, Japan, humus (pitans) deposited by the mixing of carcasses and volcanic ashes of marine flora and fauna ) Is 2.5 to 5 wt% of divalent trivalent iron (magnetite), 50 to 70 wt% of other minerals, and 35 to 45 wt% of organic matter.

In the wastewater treatment process of Japanese Patent Publication No. Hei 5-6619, the above-mentioned humus soil is formed into pellets in the microbial culture process, and rhyolite or dacite pumice is formed. ) And the bio-reactor was applied to the bio-reactor to improve the treatment efficiency compared to the general biological (active sludge) treatment process.

In the case of Korean Patent Publication No. 2003-0019285, the above-mentioned humic soil was molded and processed into pellets, and the minerals were filled together with bioreactors and treated with drinking water for feeding pigs. There was an effect of reducing the odor inside, etc., and treatment of the drinking water of the laying hens resulted in the improvement of the laying rate and the reduction of the odor in the house.

In addition, in the case of humic soils containing magnetized divalent trivalent iron salts and various mineral salts, air purification, fermented food manufacturing process, deodorization process, soil improving agent, feed additive, and growth of crops And it is widely used in various fields, such as a germination promoter and a cosmetic additive.

However, in the case of Nagasaki Prefecture's eroded wetland, the eroded soils are being sold at a very high price while being kept under development in terms of wetland conservation and environmental conservation. There is an economic problem, and there is a serious difference in composition according to the location and location of the mining, there is a problem such as the efficiency is greatly reduced when the divalent--3 iron content is low.

An object of the present invention is to provide a method for producing a pellet of a mineral salt containing a high covalent divalent trivalent iron salt and a divalent trivalent iron salt to solve the above problems.

In order to achieve the above object, the present invention dehydrates water when high purity magnetite (Fe ₃ O ₄ ) is produced by injecting alkali while heating an aqueous solution mixed with ferrous and ferric salts to adjust the pH to 12-14. After drying, the coercive force magnetizes as high as possible to produce magnetized magnetite, dissolves the magnetized magnetite in hydrochloric acid, injects fulvic acid to produce metal salts and complex salts, and then neutralizes with alkali to produce magnetized divalent and trivalent iron. It is characterized by consisting of the step of preparing a salt solution, the molding process in the form of pellets (Pellet).

The present invention is a method for producing pellets of divalent trivalent iron salt used in microbial culture process, drinking water treatment process, water treatment process, sewage and wastewater treatment process, deodorization treatment process is as follows.

1. Manufacturing process of magnetized magnetite

Alkali is injected while the mixed aqueous solution of ferric and trivalent salts is heated to 80 to 100 ° C. to adjust the pH to 12 to 14 to produce black magnetite (Fe ₃ O ₄ ).

^{Fe 2+ + 2Fe 3+ + 8OH -} → Fe 3 O 4 + 4H 2 O ............................... ①

The ferric salt used herein is ferrous sulfate (FeSO ₄ ), ferric chloride (FeCl ₂ ), and the ferric salt is ferric sulfate (Fe ₂ (SO ₄ ) ₃ ), ferric chloride (FeCl) ₃ ) is used, and alkali is used for caustic soda (NaOH), ammonia water (NH ₄ OH), potassium hydroxide (KOH), sodium carbonate (Na ₂ CO ₃ ).

In the present invention, in order to improve the yield of the reaction of the reaction formula ①, the stirring reaction is performed under the magnetic field of the reactor in which the electromagnet is installed.

After the reaction of Scheme ① is completed, to wash the salt generated in the reaction process 3-4 times, and then dried after dehydration.

The dried magnetite powder is injected into the yoke of the magnetizer by compressing and filling a capsule, such as a plastic bottle, into the yoke of the magnetizer, and magnetizing the magnetic flux at a magnetic flux density of 350 to 500 G (Gauss). Do

At this time, in order to produce a magnetite having a higher coercivity, the dried magnetite produced in the reaction equation ① is heated in an oxygen atmosphere to produce gamma ferric oxide (γ-Fe ₂ O ₃ ), or the magnetite is 30 to 35wt% hydrogen peroxide ( When reacted with H ₂ O ₂ ), the production rate of gamma ferric oxide (γ-Fe ₂ O ₃ ) is improved.

Next, the ferric gamma oxide (γ-Fe ₂ O ₃ ) is dissolved in a hydrochloric acid solution, and alkali (Alkali) is injected while heating to 80-100 ° C. under a magnetic field of a reactor equipped with an electromagnet to adjust the pH to 12-14. Black magnetite is regenerated.

4Fe ₃ O ₄ + O ₂ → 6γ-Fe ₂ O ₃ ..................... .... ②

2Fe ₃ O ₄ + H ₂ O ₂ → 3γ-Fe ₂ O ₃ + H ₂ O .............................. .③

γ-Fe ₂ O ₃ + 6HCl → 2FeCl ₃ + 3H ₂ O ................................. ④

FeCl ₂ + 2FeCl ₃ + 8NaOH → Fe ₃ O ₄ + 8NaCl + 4H ₂ O .......................... ⑤

FeCl ₂ + 2FeCl ₃ + 8NH ₃ + 4H ₂ O → Fe ₃ O ₄ + 8NH ₄ Cl ..................... ⑥

After completion of the reaction of reaction formula ⑤ or ⑥, to remove the salt generated in the reaction process, it is washed three to four times and then dried after dehydration.

The dried magnetite powder is injected into the yoke of the magnetizer by compression-filling a capsule such as a plastic bottle and magnetized to a magnetic flux density in the range of 450 to 500G.

2. Preparation Step of Divalent-3 Ferric Salt Solution

The magnetized magnetite magnetite powder is dissolved in concentrated hydrochloric acid solution.

Fe ₃ O ₄ + 8HCl → FeCl ₂ + 2FeCl ₃ + 4H ₂ O ............................. ⑦

When the reaction of Scheme ⑦ is completed, the mixing ratio of fulvic acid and divalent and trivalent iron salts is mixed and stirred in the range of 0.8-1.2 by weight ratio (dry basis) of fulvic acid / divalent and trivalent iron salts. To make a bivalent trivalent iron salt solution.

Fulvic acid + divalent and trivalent iron salts → Complex iron fulvate (divalent trivalent iron salt) ..................... ................................ ⑧

Fulvic acid is treated with alkali, such as primary caustic soda (NaOH), to adjust the pH to 13-14 by treating natural corrosive substances (peat) with strong acids such as hydrochloric acid (HCl) in the dissolved solution. After the pH was adjusted to 1.0∼2.0 to remove the precipitated humic acid (Humic acid) and then extracted in solution.

At this time, instead of artificially manufactured magnetite magnetite powder in the reaction of Reaction Formula ⑦ described above, it is also possible to use a powder obtained by grinding natural magnetite with 300 to 400 mesh.

3. Forming process in pellet form

Natural stone (reactive mineral) containing a large amount of feldspar, macrocrystal, rhyolite or luteite, and quartzite rock; Stone, quartz diorite feldspar, tajing stone, megalithic stone, corundum, olivine, hornblende Minerals mixed with two or more kinds of minerals such as biotite, zeolite, zeolite, calcite, clay, and volcanic ash in 300-400 mesh. The pulverized powder is mixed and mixed with a corrosive substance at a ratio of organic matter and inorganic matter in a ratio of 0.8 to 1.2, and the content of iron is 3 to 15 wt% based on the dry weight of a divalent-iron ferric salt solution. After mixing in the range of%, it is left to mature for 1 to 24 months, and then mixed by stirring and mixing sodium alginate with a binder to form a sphere or pellet. Processed as prepared in the following 2-3 days after the natural drying is 2 the mineral salts contained -3 dried with a hot air atmosphere of 200~250 ℃ gacheol salt pellets (Pellet).

As described above, the present invention is widely used in these fields because it has an effect of improving efficiency when used in a microbial culture process, drinking water treatment process, water treatment process, sewage and wastewater treatment process, deodorization treatment process, and the like. It is expected to be.

Claims (1)

Limestone, macrocrystalline, pumice, quartz bedrock, and quartz diorite feldspar containing large amounts of active minerals (reactive minerals)醫 王石, Tajing Stone, Giant Stone, Cicada, Olivet, Hornblende, Biotite, Zeolite, Pasparite The powder obtained by pulverizing minerals such as clay, clay and volcanic ash alone or mixed with two or more kinds with 300 to 400 mesh is made of organic matter / Magnesium magnetite powder or natural magnetite powder is dissolved in an aqueous hydrochloric acid solution, mixed with stirring to a weight ratio of minerals in a ratio of 0.8 to 1.2, and thus, fulvic acid and divalent and trivalent iron salts. The dihydric-3 iron solution reacted by mixing and stirring in the range of 0.8-1.2 in the weight ratio (dry basis) of fulvic acid / divalent and trivalent iron salts On a dry basis, the iron content is mixed in the range of 3 to 15 wt%, left for 1 to 24 months to mature, and then mixed and stirred with sodium alginate as a binder to form a sphere or pellet. A method of producing pellets of divalent-valent iron salts containing mineral salts by drying with hot air at 200-250 ° C. after natural drying for 2-3 days after processing.