NO126957B - - Google Patents
Info
- Publication number
- NO126957B NO126957B NO04108/71*[A NO410871A NO126957B NO 126957 B NO126957 B NO 126957B NO 410871 A NO410871 A NO 410871A NO 126957 B NO126957 B NO 126957B
- Authority
- NO
- Norway
- Prior art keywords
- dust
- pellets
- sio
- sintered
- metallurgical
- Prior art date
Links
- 239000000428 dust Substances 0.000 claims description 16
- 239000008188 pellet Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000003723 Smelting Methods 0.000 claims 2
- 238000010310 metallurgical process Methods 0.000 claims 1
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/02—Working-up flue dust
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Metallurgy (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geochemistry & Mineralogy (AREA)
- Silicon Compounds (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Description
Fremgangsmåte ved metallurgiske Procedure by metallurgical
prosesser hvor SiC>2 inngår som char.gekomponent. processes where SiC>2 is included as charge component.
Det er kjent at røken fra metallurgiske ovner for fremstilling av Si-metall It is known that the smoke from metallurgical furnaces for the production of Si metal
og Si-rike legeringer fører med seg store mengder av finfordelt amorft støv, and Si-rich alloys carry with them large amounts of finely divided amorphous dust,
som hovedsaklig består av SiC^. Støvet som er meget voluminøst, kan ut- which mainly consists of SiC^. The dust, which is very voluminous, can
felles fra røkgassene på forskjellig vis, f. eks. i elektrofilter, posefilter, gassvasker eller annet rensesystem. Støvet er imidlertid et uønsket bi- separated from the flue gases in different ways, e.g. in an electrofilter, bag filter, gas washer or other cleaning system. However, the dust is an unwanted by-
produkt, som produsentene har store problemer med å disponere. product, which the producers have great difficulty in disposing of.
Den metallurgiske industri blir i stadig større grad pålagt å fjerne støv og skadelige-bestanddeler fra avgassene før de slippes ut i atmosfæren. Mengden av oppsamlet støv er derfor sterkt økendej og det har i den senere tid oppstått større problemer med å bli kvitt, respektive finne anvendelser for det utskilte Kfr. kl. 40a-l/14 The metallurgical industry is increasingly required to remove dust and harmful components from the exhaust gases before they are released into the atmosphere. The amount of collected dust is therefore increasing stronglyj and in recent times there have been greater problems with getting rid of, or finding uses for, the secreted Kfr. 40a-l/14
støv som hoper seg opp i stadig større mengder. dust that accumulates in ever greater quantities.
Søkeren har i lengre tid drevet forsøk og undersøkelser for å finne anvend-elsesområder for dette støv. En del av disse forsøk har falt meget heldig ut, men de mengder som kan avtas er langt mindre enn de mengder som produseres, så opphopningen av støv vil likevel fortsette. The applicant has for a long time carried out experiments and investigations to find areas of application for this dust. Some of these attempts have turned out to be very successful, but the quantities that can be removed are far less than the quantities that are produced, so the accumulation of dust will still continue.
Man har også gjort tallrike forsøk for å finne en metode til å resirkulere Numerous attempts have also been made to find a method to recycle
støvet, dvs. til å føre det tilbake til smelteovnen, respektive andre smelteovner som SiO^-kilde, slik at man både blir kvitt støvet og samtidig kan spare kvarts som ellers er den vanlige SiC^-kilden. the dust, i.e. to return it to the melting furnace, respectively other melting furnaces as a SiO^ source, so that you both get rid of the dust and at the same time save quartz, which is otherwise the usual SiC^ source.
Søkeren har nu funnet at støvet kan pelletiseres med bare tilsats av vann, hvorpå de rå pellets overføres direkte til en sjaktovn hvor de sintres ved temperaturer på 600 - 1200°C uten forutgående tørking. The applicant has now found that the dust can be pelletised with only the addition of water, after which the raw pellets are transferred directly to a shaft furnace where they are sintered at temperatures of 600 - 1200°C without prior drying.
Støvet er meget finfordelt med en spesifikk overflate på opptil over 400.000 cm<2 >pr. cm <3>. Dette medfører at det må tilsettes adskillig vann under pelleti-seringen slik at de dannede pellets inneholder 20 - 25% vann eller endog mer. Det er meget vanskelig å tørke slike sterkt vannholdige pellets og vanlig erfaring er at pelletene vil eksplodere og falle fra hverandre allerede på toppen av sjaktovnen hvis de tilføres denne uten forutgående tørking. Det var derfor meget overraskende og uventet at man kunne brenne slike pellets direkte i sjaktovn uten fortørking. The dust is very finely divided with a specific surface of up to over 400,000 cm<2 >per cm <3>. This means that a lot of water must be added during pelletisation so that the formed pellets contain 20 - 25% water or even more. It is very difficult to dry such highly water-containing pellets and common experience is that the pellets will explode and fall apart already at the top of the shaft furnace if they are fed to it without prior drying. It was therefore very surprising and unexpected that such pellets could be burned directly in a shaft furnace without pre-drying.
De sintrede pellets er mekanisk meget faste med en trykkstyrke på 50-150 kg, hvilket er tilstrekkelig for anvendelse i smelteovner. Støvdannelsen (■♦• 1 mm) etter 5000 omdreininger i spesialtrommel med innvendig ribber varierte fra 2 - 40%, hvilket også er innenfor den kritiske grense. The sintered pellets are mechanically very firm with a compressive strength of 50-150 kg, which is sufficient for use in melting furnaces. The dust formation (■♦• 1 mm) after 5000 revolutions in a special drum with internal ribs varied from 2 - 40%, which is also within the critical limit.
Støv fra posefilter ble pelletisert under tilsats av 25% vann. Pelletene ble sintret i sjakt uten fortørking og prøver uttatt ved forskjellige temperaturer for måling av trykkstyrke og støvdannelse (%> + 1 mm etter 5000 omdreininger i spesialtrommel). Dust from bag filters was pelletized with the addition of 25% water. The pellets were sintered in a shaft without pre-drying and samples taken at different temperatures for measuring compressive strength and dust formation (%> + 1 mm after 5000 revolutions in a special drum).
Claims (1)
Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO04108/71*[A NO126957B (en) | 1971-11-08 | 1971-11-08 | |
ZA727319A ZA727319B (en) | 1971-11-08 | 1972-10-13 | Method for preparing sintered sio2 pellets which can be used as a charge component in metallurgical processes |
IT3080272A IT969803B (en) | 1971-11-08 | 1972-10-23 | METHOD FOR METALLUR GIC PROCEDURES THAT INCLUDE SIO2 AS A CHARGING COMPONENT |
AU48280/72A AU475509B2 (en) | 1971-11-08 | 1972-10-30 | Treatment of sio containing dust from metallurgical smelting processes |
CA155,264A CA965958A (en) | 1971-11-08 | 1972-10-31 | Method of recycling silicon dioxide |
DE2253590A DE2253590A1 (en) | 1971-11-08 | 1972-11-02 | METHOD OF MANUFACTURING PELLETS FROM SILICON DIOXIDE DUST |
CH1607372A CH588560A5 (en) | 1971-11-08 | 1972-11-03 | |
ES408285A ES408285A1 (en) | 1971-11-08 | 1972-11-04 | Method for metalurgical procedures that include sio as a loading component. (Machine-translation by Google Translate, not legally binding) |
JP11082572A JPS5337295B2 (en) | 1971-11-08 | 1972-11-07 | |
BR783672A BR7207836D0 (en) | 1971-11-08 | 1972-11-08 | PROCESS FOR RECOVERY OF RESIDUAL GAS SILICA |
CS755272A CS192501B2 (en) | 1971-11-08 | 1972-11-08 | Method of producing metals with charge containing silicon dioxide |
FR7239604A FR2159391A1 (en) | 1971-11-08 | 1972-11-08 | Silicon dioxide dust - pelletisation and re-use of dust from silicon and silicon alloy manufacture |
US49640474 US3925058A (en) | 1971-11-08 | 1974-08-12 | Method of recycling silicon dioxide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO04108/71*[A NO126957B (en) | 1971-11-08 | 1971-11-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
NO126957B true NO126957B (en) | 1973-04-16 |
Family
ID=19880078
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO04108/71*[A NO126957B (en) | 1971-11-08 | 1971-11-08 |
Country Status (12)
Country | Link |
---|---|
JP (1) | JPS5337295B2 (en) |
AU (1) | AU475509B2 (en) |
BR (1) | BR7207836D0 (en) |
CA (1) | CA965958A (en) |
CH (1) | CH588560A5 (en) |
CS (1) | CS192501B2 (en) |
DE (1) | DE2253590A1 (en) |
ES (1) | ES408285A1 (en) |
FR (1) | FR2159391A1 (en) |
IT (1) | IT969803B (en) |
NO (1) | NO126957B (en) |
ZA (1) | ZA727319B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2519810C2 (en) * | 1975-05-03 | 1983-01-13 | Fried. Krupp Gmbh, 4300 Essen | Process for processing powdery material from metallurgical exhaust gases |
JPH0131221Y2 (en) * | 1981-05-08 | 1989-09-25 | ||
JPS5864332U (en) * | 1981-10-26 | 1983-04-30 | 合資会社伸高工業 | Pine surge device for bathtub |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3039165A (en) * | 1954-04-28 | 1962-06-19 | Solite Corp | Method and apparatus for production of lightweight aggregate from dust |
-
1971
- 1971-11-08 NO NO04108/71*[A patent/NO126957B/no unknown
-
1972
- 1972-10-13 ZA ZA727319A patent/ZA727319B/en unknown
- 1972-10-23 IT IT3080272A patent/IT969803B/en active
- 1972-10-30 AU AU48280/72A patent/AU475509B2/en not_active Expired
- 1972-10-31 CA CA155,264A patent/CA965958A/en not_active Expired
- 1972-11-02 DE DE2253590A patent/DE2253590A1/en active Pending
- 1972-11-03 CH CH1607372A patent/CH588560A5/xx not_active IP Right Cessation
- 1972-11-04 ES ES408285A patent/ES408285A1/en not_active Expired
- 1972-11-07 JP JP11082572A patent/JPS5337295B2/ja not_active Expired
- 1972-11-08 FR FR7239604A patent/FR2159391A1/en active Granted
- 1972-11-08 CS CS755272A patent/CS192501B2/en unknown
- 1972-11-08 BR BR783672A patent/BR7207836D0/en unknown
Also Published As
Publication number | Publication date |
---|---|
BR7207836D0 (en) | 1974-09-05 |
DE2253590A1 (en) | 1973-05-17 |
FR2159391B1 (en) | 1975-06-13 |
AU4828072A (en) | 1974-05-16 |
AU475509B2 (en) | 1976-08-26 |
CH588560A5 (en) | 1977-06-15 |
CA965958A (en) | 1975-04-15 |
ZA727319B (en) | 1974-05-29 |
CS192501B2 (en) | 1979-08-31 |
JPS5337295B2 (en) | 1978-10-07 |
ES408285A1 (en) | 1975-11-16 |
JPS4857821A (en) | 1973-08-14 |
FR2159391A1 (en) | 1973-06-22 |
IT969803B (en) | 1974-04-10 |
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