SU290946A1 - METHOD OF DRYING MIXTURE OF SULFUR ACID SALTS - Google Patents

METHOD OF DRYING MIXTURE OF SULFUR ACID SALTS

Info

Publication number
SU290946A1
SU290946A1 SU1289546A SU1289546A SU290946A1 SU 290946 A1 SU290946 A1 SU 290946A1 SU 1289546 A SU1289546 A SU 1289546A SU 1289546 A SU1289546 A SU 1289546A SU 290946 A1 SU290946 A1 SU 290946A1
Authority
SU
USSR - Soviet Union
Prior art keywords
mixture
acid salts
sulfur acid
drying mixture
salts
Prior art date
Application number
SU1289546A
Other languages
Russian (ru)
Original Assignee
А. И. Христин
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by А. И. Христин filed Critical А. И. Христин
Priority to SU1289546A priority Critical patent/SU290946A1/en
Application granted granted Critical
Publication of SU290946A1 publication Critical patent/SU290946A1/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C33/00Making ferrous alloys

Description

Изобретение относитс  к области норошковой металлургии, в частности к дегидратации смеси сернокислых солей нри изготовлении ферритовы.х порошков.FIELD OF THE INVENTION The invention relates to the field of low-pressure metallurgy, in particular, to the dehydration of a mixture of sulphate salts in the manufacture of ferrite powders.

Примен емый в насто ндее врем  способ сушки смесей сернокислых солей при 90- 110°С сопровол ;даетс  их расплавлением, что снижает эффективность процесса.The presently used method of drying mixtures of sulphate salts at 90-110 ° C is accompanied by their melting, which reduces the efficiency of the process.

Основна  отличительна  особенность предложенного способа заключаетс  в том, что перед сунлкой нри 90-110°С провод т обезвоживание в вакууме при 35-37°С, а затем при 55-57°С.The main distinctive feature of the proposed method is that in front of the nunk at 90-110 ° C, vacuum dewatering is carried out at 35-37 ° C and then at 55-57 ° C.

При изготовлении Мп-Zn и Ni-Zn ферритовых порошков используют термическое разложение сернокислых солей железа, марганца , цинка и никел , содержащих 5-7 молекул кристаллизационной воды.In the manufacture of Mn-Zn and Ni-Zn ferrite powders using thermal decomposition of sulfate salts of iron, manganese, zinc and nickel containing 5-7 molecules of water of crystallization.

В процессе дегидратации дл  предотвращени  расплавлени  смеси солей производ т удаление 1-2 молекул кристаллизационной воды при температуре более низкой чем та, при которой возможно расплавление, дл  чего над смесью солей создают определенное разрежение и выдерживают эту смесь при указанной температуре в течение требуемого интервала времени.In the process of dehydration, in order to prevent the mixture of salts from melting, 1-2 molecules of water of crystallization are removed at a lower temperature than melting, for which a certain vacuum is created over the mixture of salts and the mixture is maintained at the specified temperature for the required time interval.

тролируемый нагрев и создают требуемое разрежение.controlled heating and create the required vacuum.

Например, дегидратацию смеси сернокислых солей, содержащей FeSO4 7Н2О; ZnS04-7H2O; MnSO4-6H2O, количество которых соответствует щихтовому составу Ре2Оз- 70,8 вес. %, ZnO-9,8 вес. % и МпО- 19,6 вес. %, провод т по режиму: нагрев при Зб°С и остаточном давлении 70 мм рт. ст. вFor example, dehydration of a mixture of sulphate salts, containing FeSO4 7Н2О; ZnS04-7H2O; MnSO4-6H2O, the number of which corresponds to the total composition of Pe2Oz is 70.8 wt. %, ZnO-9,8 weight. % and MpO- 19.6 wt. %, carried out according to the mode: heating at 3 ° C and a residual pressure of 70 mm Hg. Art. at

45 мин, затем нагрев при 55°С и остаточном давлении 20 мм рт. ст. в течение 1 час и нагрев смеси солей при 100°С в течение 3 час. 45 min, then heating at 55 ° C and a residual pressure of 20 mm Hg. Art. for 1 hour and heating the mixture of salts at 100 ° C for 3 hours.

При изменении соотнощени  вход щих вWhen changing the ratio of incoming

смесь компонентов режим дегидратации несколько измен етс .the mixture of components the mode of dehydration varies somewhat.

Пред.мет изобретени Prev Invention

Способ сушки смеси сернокислых солей, например , при изготовлении ферритовых порошков , включающий нагрев при 90-110°С, отличающийс  тем, что, с целью предотвращени  расплавлени  смеси, провод т предварительное ее обезвоживание сначала при 35- 37°С и давлении не более 75 мм рт. ст. в течение 0,5-1 час, а затем при 55-57°С и давлении не более 25 мм рт. ст. в течение 0,5- 1 час.A method of drying a mixture of sulphate salts, for example, in the manufacture of ferrite powders, comprising heating at 90-110 ° C, characterized in that, in order to prevent the mixture from melting, it is first dried at 35-37 ° C and pressure not exceeding 75 mm Hg Art. within 0.5-1 hour, and then at 55-57 ° C and a pressure of not more than 25 mm Hg. Art. within 0.5-1 hour.

SU1289546A 1968-12-09 1968-12-09 METHOD OF DRYING MIXTURE OF SULFUR ACID SALTS SU290946A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU1289546A SU290946A1 (en) 1968-12-09 1968-12-09 METHOD OF DRYING MIXTURE OF SULFUR ACID SALTS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1289546A SU290946A1 (en) 1968-12-09 1968-12-09 METHOD OF DRYING MIXTURE OF SULFUR ACID SALTS

Related Child Applications (1)

Application Number Title Priority Date Filing Date
SU884606018A Addition SU1604473A2 (en) 1988-11-16 1988-11-16 Intercompartment partition for tube mill

Publications (1)

Publication Number Publication Date
SU290946A1 true SU290946A1 (en) 1971-01-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU1289546A SU290946A1 (en) 1968-12-09 1968-12-09 METHOD OF DRYING MIXTURE OF SULFUR ACID SALTS

Country Status (1)

Country Link
SU (1) SU290946A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0091640A2 (en) * 1982-04-14 1983-10-19 BASF Aktiengesellschaft Process for the preparation of ferrites from iron (II) sulfate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0091640A2 (en) * 1982-04-14 1983-10-19 BASF Aktiengesellschaft Process for the preparation of ferrites from iron (II) sulfate

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