CN103834819B - A kind of method containing the zinc material direct producing high-grade zinc oxide of high chlorine and fluorine - Google Patents
A kind of method containing the zinc material direct producing high-grade zinc oxide of high chlorine and fluorine Download PDFInfo
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- CN103834819B CN103834819B CN201310644858.7A CN201310644858A CN103834819B CN 103834819 B CN103834819 B CN 103834819B CN 201310644858 A CN201310644858 A CN 201310644858A CN 103834819 B CN103834819 B CN 103834819B
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- 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
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Abstract
Containing a method for the zinc material direct producing high-grade zinc oxide of high chlorine and fluorine, step is as follows: will containing the zinc material of high chlorine, fluorine, boiler face ash, and anthracite fine coal mixes by a certain percentage, broken, adds binding agent, mixes and makes pelletizing after rolling; After blowing-in burden(ing) red heat in zinc oxygen stove, by natural air drying, the pelletizing of two days drops in zinc oxygen stove, and air blast, puts waste gas 10 ~ 15 minutes, blast volume controls at 20% ~ 30% of total blast volume; After operating a switch, increase the blast volume entering zinc oxygen stove, in half an hour, the furnace temperature of zinc oxygen stove is risen to more than 1050 DEG C, control exhausting amount, make aluminum pipe section furnace gas temperature be 450 ~ 550 DEG C, bag room section furnace gas temperature is 180 ~ 250 DEG C; Tap to tap time is 1.5 ~ 2.5 hours.The inventive method, the approach of material choice and wider, production cost is low, and metal recovery rate is high, and the zinc oxide content obtained reaches 98 ~ 99%.
Description
Technical field
The present invention relates to a kind of production method of zinc oxide, especially relate to a kind of method that zinc material direct method containing high chlorine and fluorine produces grade zinc oxide.
Background technology
American process zinc oxide (ZnO) technique: generally refer to zinc ore concentrate to be raw material, through roasting de-lead, cadmium, arsenic, sulphur etc., after making zinc sulphide change zinc oxide into, or directly contain Zn scrap returns with cadmia, zinc gray etc., be equipped with suitable hard coal again and binding agent is pressed into group, in zinc oxygen stove, restore evaporation, oxidation generates pure zinc oxide.The main grade of American process zinc oxide is between 80-99.5%, and wherein ZnO >=98% is high-grade zinc oxide.
At present, utilize zinc oxygen stove direct method to prepare the raw material of high-grade zinc oxide (ZnO >=98%), mainly use the zinc baking sand of high quality zinc concentrate output after fluidizing furnace high-temperature roasting.Because high quality zinc concentrate resource is nervous, and zinc baking sand production facility Environmental Inputs is large, causes the grade zinc oxide production cost of this method output high, the grade zinc oxide produced by the Zn scrap returns such as cadmia, zinc gray gradually replace.
CN1284571A discloses a kind of method of producing high-grade zinc oxide, use the Furnace for obtaining white zinc device of contriver's invention, double-burner structure operated in turn is adopted to smelt, in first group of burner smelting process, in body of heater, second group of burner starts to carry out into operations such as ground coal, pellet, sulphur-fixing agent, waste airs, when first group of burner smelting enters the tail powder phase, second group of burner is mentioned gate and is started to smelt, on pellet, cover one deck sulphur-fixing agent when body of heater smelting palletizing ore deposit, powder is received in insulating powder pond under the high temperature of 770 ~ 1100 DEG C.The present invention selects zinc baking sand and reduction coal under the effect of tackiness agent, is pressed into pellet, causes the production cost of zinc oxide to improve.
CN1265428A discloses a kind of method of producing zinc oxide, the method with Furnace for obtaining white zinc smelted furnace cinder for main raw material, be aided with smelting zinc slag or the zinc oxide ore of low cost, by Furnace for obtaining white zinc slag with after smelting zinc slag or zinc oxide ore fragmentation, with reduction coal and tackiness agent mix, be pressed into pellet, zinc and lead in pellet is made during batching, cadmium, arsenic, copper, the weight ratio of the zinc oxide that sulphur impurity generates after oxidation and oxide impurity is greater than 95:5, it is Furnace for obtaining white zinc slag by weight proportion: other are containing Zn scrap returns: coal dust: the ratio batching of tackiness agent=40 ~ 55:30 ~ 45:8 ~ 15:2 ~ 3, wherein tackiness agent uses lime, the nodulizing suppressed is dropped into Furnace for obtaining white zinc, smelt by American process zinc oxide production technique, obtain high-grade zinc oxide.The invention provides and utilize Furnace for obtaining white zinc smelted furnace cinder to produce the proportioning directly sending zinc oxide, but do not illustrate smelting technology condition, and the zinc oxide that production obtains is the zinc oxide of 98 ~ 98%, quality product need to improve.
The rudimentary zinc oxide technique directly substituting the main grade of zinc baking sand making ZnO 80 ~ 95% with the Zn scrap returns such as cadmia, zinc gray is more common, but the high-grade zinc oxide wanting main grade>=98% of output then needs to select chlorine (Cl
-), fluorine (F
-) Zn scrap returns of ion content (generally about 0.1%) on the low side, and for chlorine (Cl
-) the higher Zn scrap returns of ion then needs to be carried out by material in advance dechlorination, fluorine process (adopt pyrogenic process calcining dechlorination) as founding slag etc., is transformed into low chlorine (Cl
-), fluorine (F
-) zinc baking sand, be used further to the manufacture of direct method grade zinc oxide.
CN102839282A discloses a kind of method utilizing low-grade zinc oxide ore production high-purity nano-zinc oxide, comprises the following steps: leach pending low-grade zinc oxide ore, purification and impurity removal, ammonia still process crystallization and dry calcination; Adopt ammoniacal liquor-ammonium fluid to leach, and add 0.3 ~ 0.5kg Sodium Silicofluoride in every cubic metre of ammoniacal liquor-ammonium fluid, before purification and impurity removal step, carry out pre-ammonia still process, and after purification and impurity removal, carry out refinement treatment; By the process of technical measure, the purity zinc oxide obtained through 350 ~ 450 DEG C of calcinings can reach more than 99.7%, and particle diameter is at the nano oxidized zinc product of 10-50nm.The good product quality of this invention, but in preparation process, add the pending treatment process such as low-grade zinc oxide ore, purification and impurity removal, ammonia still process crystallization of leaching, make the production cost of product higher.
CN101386913B discloses a kind of method of recovering zinc oxide in Zn-containing dust treatment by rotary hearth furnace.Mixed with coal and flux by zinc-containing dust, send into rotary hearth furnace after then carrying out briquetting drying and carry out direct-reduction, the zinc in dust reclaims from waste gas, and the material block after dezincification is by carrying out after rotary hearth furnace direct-reduction cooling or using after briquetting.The present invention utilizes zinc-containing dust to reclaim zinc oxide, but the zinc oxide product zinc oxide content of preparation is about 70%, can not arrive the standard of high-grade zinc oxide.
There is following problem in existing direct producing high-grade zinc oxide technique: cadmia, zinc gray etc. are limited or need to increase the dechlorination treatment process together to raw material as the selection of raw material containing high chlorine, fluorine zinc material, or products production cost is high, or zinc oxide product quality can not be up to standard.
Summary of the invention
The technical problem to be solved in the present invention is: overcome in prior art the deficiency prepared in direct method containing the zinc material of high chlorine and fluorine in grade zinc oxide production technique, there is provided a kind of material choice scope wide, the method for the zinc material direct producing high-grade zinc oxide containing high chlorine, fluorine that production cost is low.
The technical scheme that the present invention solves the employing of its technical problem is: a kind of method containing the zinc material direct producing high-grade zinc oxide of high chlorine and fluorine, and step is as follows:
1) by containing the zinc material of high chlorine and fluorine with the raw material of boiler face ash composition mixes by a certain percentage with fuelled smokeless fine coal, fragmentation, add binding agent, mix and make pelletizing after rolling; The described weight containing the zinc material of high chlorine and fluorine accounts for 75 ~ 85% of raw material gross weight; The weight of described boiler face ash accounts for 15 ~ 25% of raw material gross weight; The zinc content of described pelletizing is 32 ~ 38%(weight percent), carbon content is 30 ~ 35%(weight percent);
2) after blowing-in burden(ing) red heat in zinc oxygen stove, pelletizing by natural air drying in the step 1) of two days drops in zinc oxygen stove, and air blast, put waste gas 10 ~ 15 minutes, blast volume controls at 20% ~ 30% of total blast volume, makes the poisonous metal such as lead, cadmium and low-melting-point material enter in waste gas powder;
3) after operating a switch, enter the ascending increase of blast volume of zinc oxygen stove, in half an hour, the furnace temperature of zinc oxygen stove is risen to more than 1050 DEG C, control exhausting amount, make aluminum pipe section furnace gas temperature be 450-550 DEG C, bag room section furnace gas temperature is 180-250 DEG C, and tap to tap time is 1.5 ~ 2.5 hours;
4) close zinc oxygen stove, slag tap, top of the slag top scum silica frost and residual single group are solely collected stacking, screen residual group and melt down smelting, powder is boiler face ash, goes to batching use next time; What aluminum pipe section and the cooling of bag room section were collected is American process zinc oxide.
Further, in step 1), the described zinc material containing high chlorine and fluorine is founding slag.
Further, in step 1), the described weight percent containing the zinc material of high chlorine and fluorine is 80%.
Further, in step 1), the weight percent of described boiler face ash is 20%.
Further, step 2) in, described total blast volume is 7270m
3/ h.
Further, step 2) in, described blast volume is 25% of total blast volume.
Further, in step 3), the furnace temperature of described zinc oxygen stove is 1100 ~ 1300 DEG C.
Further, in step 3), described tap to tap time is 2 hours.
Further, in step 4), the content of described zinc oxide is 98% ~ 99%.
Powder in the furnace bottom ash of zinc oxygen stove output and slag also can alternative steps 1) in boiler face ash be used for batching, briquetting.
Beneficial effect of the present invention:
1, solve high chloride and fluorine zinc material (as founding slag etc.) direct method prepare high-grade zinc oxide production process control in technological problems, reach and " dechlorination " just need not can be directly used in grade zinc oxide manufacture, make the approach of material choice and wider, the manufacturing cost of product is low;
2, fully utilize the low ash of the boiler face containing zinc, because boiler face ash is zinc stove oxygen self output object, have passed through pyrotic smelting, containing the carbon of about 15%, and calcium, magnesium, iron are higher, and poisonous metal and low-melting-point material are seldom, and particle is partially thick again, after adding boiler face ash, the pelletizing thing phase composite of preparation is comparatively reasonable, and nodulizing physicals is better, not only closely knit but also possess good ventilation property, slag making is functional, improves metal recovery rate;
3, by controlling to put the time of waste gas and the size of blast volume, the content of the poisonous metals such as lead, cadmium in product and low-melting-point material is reduced;
4, by controlling the temperature of aluminum pipe section and bag room section in smelting process, reducing the generation of low melting point in product, improve the content of zinc oxide in product, ensure that the quality product (ZnO >=98%) of high-grade zinc oxide;
5, present method operation rate-determining steps is simple, practical.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
embodiment 1
The present embodiment step is as follows:
1) by containing the zinc material of high chlorine and fluorine with the raw material of boiler face ash composition mixes by the weight ratio of 100 ﹕ 34 ﹕ 75 with fuelled smokeless fine coal, fragmentation, add binding agent, mix and make pelletizing after rolling; Make the zinc content of pelletizing be 32%, carbon content is 35%;
2) after blowing-in burden(ing) red heat in zinc oxygen stove, the pelletizing by natural air drying in the step 1) of two days drops in zinc oxygen stove, and air blast, puts waste gas 10 minutes, and blast volume controls at 20% of total blast volume, make the poisonous metal such as lead, cadmium and low-melting-point material enter in waste gas powder;
3) after operating a switch, enter the ascending increase of blast volume of zinc oxygen stove, in half an hour, the furnace temperature of zinc oxygen stove is risen to 1100 ± 20 DEG C, control exhausting amount, make aluminum pipe section furnace gas temperature be 480 DEG C, bag room section furnace gas temperature is 200 DEG C; Tap to tap time is 2.5 hours;
4) close zinc oxygen stove, slag tap, top of the slag top scum silica frost and residual single group are solely collected stacking, screen residual group and melt down smelting, powder is boiler face ash, goes to batching use next time; What aluminum pipe section and the cooling of bag room section were collected is American process zinc oxide.
In high-grade zinc oxide product prepared by the present embodiment, zinc oxide content is 98.0%.
embodiment 2
The present embodiment step is as follows:
1) by containing the zinc material of high chlorine and fluorine with the raw material of boiler face ash composition mixes by the weight ratio of 100 ﹕ 27 ﹕ 81 with fuelled smokeless fine coal, fragmentation, add binding agent, mix and make pelletizing after rolling; Make the zinc content of pelletizing be 33.5%, carbon content is 34%;
2) after blowing-in burden(ing) red heat in zinc oxygen stove, the pelletizing by natural air drying in the step 1) of two days drops in zinc oxygen stove, and air blast, puts waste gas 12 minutes, and blast volume controls at 20% of total blast volume, make the poisonous metal such as lead, cadmium and low-melting-point material enter in waste gas powder;
3) after operating a switch, enter the ascending increase of blast volume of zinc oxygen stove, in half an hour, the furnace temperature of zinc oxygen stove is risen to 1200 ± 20 DEG C, control exhausting amount, make aluminum pipe section furnace gas temperature be 450 DEG C, bag room section furnace gas temperature is 180 DEG C; Tap to tap time is 2 hours;
4) close zinc oxygen stove, slag tap, top of the slag top scum silica frost and residual single group are solely collected stacking, screen residual group and melt down smelting, powder is boiler face ash, goes to batching use next time; What aluminum pipe section and the cooling of bag room section were collected is American process zinc oxide.
In high-grade zinc oxide product prepared by the present embodiment, zinc oxide content is 98.2%.
embodiment 3
The present embodiment step is as follows:
1) by containing the zinc material of high chlorine and fluorine with the raw material of boiler face ash composition mixes by the weight ratio of 100 ﹕ 18 ﹕ 95 with fuelled smokeless fine coal, fragmentation, add binding agent, mix and make pelletizing after rolling; Make the zinc content of pelletizing be 38%, carbon content is 30%;
2) after blowing-in burden(ing) red heat in zinc oxygen stove, the pelletizing by natural air drying in the step 1) of two days drops in zinc oxygen stove, and air blast, puts waste gas 15 minutes, and blast volume controls at 25% of total blast volume, make the poisonous metal such as lead, cadmium and low-melting-point material enter in waste gas powder;
3) after operating a switch, enter the ascending increase of blast volume of zinc oxygen stove, in half an hour, the furnace temperature of zinc oxygen stove is risen to 1300 ± 20 DEG C, control exhausting amount, make aluminum pipe section furnace gas temperature be 500 DEG C, bag room section furnace gas temperature is 250 DEG C; Tap to tap time is 1.5 hours;
4) close zinc oxygen stove, slag tap, top of the slag top scum silica frost and residual single group are solely collected stacking, screen residual group and melt down smelting, powder is boiler face ash, goes to batching use next time; What aluminum pipe section and the cooling of bag room section were collected is American process zinc oxide.
In high-grade zinc oxide product prepared by the present embodiment, zinc oxide content is 99.0%.
embodiment 4
The present embodiment step is as follows:
1) by containing the zinc material of high chlorine and fluorine with the raw material of boiler face ash composition mixes by the weight ratio of 100 ﹕ 25 ﹕ 90 with fuelled smokeless fine coal, fragmentation, add binding agent, mix and make pelletizing after rolling; Make the zinc content of pelletizing be 36%, carbon content is 31.5%;
2) after blowing-in burden(ing) red heat in zinc oxygen stove, the pelletizing by natural air drying in the step 1) of two days drops in zinc oxygen stove, and air blast, puts waste gas 12 minutes, and blast volume controls at 22% of total blast volume, make the poisonous metal such as lead, cadmium and low-melting-point material enter in waste gas powder;
3) after operating a switch, enter the ascending increase of blast volume of zinc oxygen stove, in half an hour, the furnace temperature of zinc oxygen stove is risen to 1250 ± 20 DEG C, control exhausting amount, make aluminum pipe section furnace gas temperature be 470 DEG C, bag room section furnace gas temperature is 190 DEG C; Tap to tap time is 1.8 hours;
4) close zinc oxygen stove, slag tap, top of the slag top scum silica frost and residual single group are solely collected stacking, screen residual group and melt down smelting, powder is boiler face ash, goes to batching use next time; What aluminum pipe section and the cooling of bag room section were collected is American process zinc oxide.
In high-grade zinc oxide product prepared by the present embodiment, zinc oxide content is 98.5%.
embodiment 5
The present embodiment step is as follows:
1) by containing the zinc material of high chlorine and fluorine with the raw material of boiler face ash composition mixes by the weight ratio of 100 ﹕ 25 ﹕ 85 with fuelled smokeless fine coal, fragmentation, add binding agent, mix and make pelletizing after rolling; Make the zinc content of pelletizing be 34%, carbon content is 33%;
2) after blowing-in burden(ing) red heat in zinc oxygen stove, the pelletizing by natural air drying in the step 1) of two days drops in zinc oxygen stove, and air blast, puts waste gas 13 minutes, and blast volume controls at 30% of total blast volume, make the poisonous metal such as lead, cadmium and low-melting-point material enter in waste gas powder;
3) after operating a switch, enter the ascending increase of blast volume of zinc oxygen stove, in half an hour, the furnace temperature of zinc oxygen stove is risen to 1200 ± 20 DEG C, control exhausting amount, make aluminum pipe section furnace gas temperature be 550 DEG C, bag room section furnace gas temperature is 210 DEG C; Tap to tap time is 2.0 hours;
4) close zinc oxygen stove, slag tap, top of the slag top scum silica frost and residual single group are solely collected stacking, screen residual group and melt down smelting, powder is boiler face ash, goes to batching use next time; What aluminum pipe section and the cooling of bag room section were collected is American process zinc oxide.
In high-grade zinc oxide product prepared by the present embodiment, zinc oxide content is 98.3%.
embodiment 6
The present embodiment step is as follows:
1) by containing the zinc material of high chlorine and fluorine with the raw material of boiler face ash composition mixes by the weight ratio of 100 ﹕ 23 ﹕ 89 with fuelled smokeless fine coal, fragmentation, add binding agent, mix and make pelletizing after rolling; Make the zinc content of pelletizing be 37%, carbon content is 31%;
2) after blowing-in burden(ing) red heat in zinc oxygen stove, the pelletizing by natural air drying in the step 1) of two days drops in zinc oxygen stove, and air blast, puts waste gas 15 minutes, and blast volume controls at 27% of total blast volume, make the poisonous metal such as lead, cadmium and low-melting-point material enter in waste gas powder;
3) after operating a switch, enter the ascending increase of blast volume of zinc oxygen stove, in half an hour, the furnace temperature of zinc oxygen stove is risen to 1300 ± 20 DEG C, control exhausting amount, make aluminum pipe section furnace gas temperature be 450 DEG C, bag room section furnace gas temperature is 230 DEG C; Tap to tap time is 1.5 hours;
4) close zinc oxygen stove, slag tap, top of the slag top scum silica frost and residual single group are solely collected stacking, screen residual group and melt down smelting, powder is boiler face ash, goes to batching use next time; What aluminum pipe section and the cooling of bag room section were collected is American process zinc oxide.
In high-grade zinc oxide product prepared by the present embodiment, zinc oxide content is 98.9%.
In the present invention, described per-cent except the per-cent of blast volume accounts for total component be that except volume percent, other are all weight percentage.
Claims (10)
1. contain a method for the zinc material direct producing high-grade zinc oxide of high chlorine and fluorine, it is characterized in that, step is as follows:
1) by containing the zinc material of high chlorine and fluorine with the raw material of boiler face ash composition mixes by a certain percentage with fuelled smokeless fine coal, fragmentation, add binding agent, mix and make pelletizing after rolling; The described weight containing the zinc material of high chlorine and fluorine accounts for 75 ~ 85% of raw material gross weight; The weight of described boiler face ash accounts for 15 ~ 25% of raw material gross weight; The zinc content of described pelletizing is 32 ~ 38%, and carbon content is 30 ~ 35%;
2) after blowing-in burden(ing) red heat in zinc oxygen stove, pelletizing by natural air drying in the step 1) of two days drops in zinc oxygen stove, and air blast, put waste gas 10 ~ 15 minutes, blast volume controls at 20% ~ 30% of total blast volume, makes lead, cadmium poisonous metal and low-melting-point material enter in waste gas powder;
3) after operating a switch, enter the ascending increase of blast volume of zinc oxygen stove, in half an hour, the furnace temperature of zinc oxygen stove is risen to more than 1050 DEG C, control exhausting amount, make aluminum pipe section furnace gas temperature be 450 ~ 550 DEG C, bag room section furnace gas temperature is 180-250 DEG C, and tap to tap time is 1.5 ~ 2.5 hours;
4) close zinc oxygen stove, slag tap, top of the slag top scum silica frost and residual single group are solely collected stacking, screen residual group and melt down smelting, powder is boiler face ash, goes to batching use next time; What aluminum pipe section and the cooling of bag room section were collected is American process zinc oxide.
2. contain the method for the zinc material direct producing high-grade zinc oxide of high chlorine and fluorine as claimed in claim 1, it is characterized in that, in step 1), the described zinc material containing high chlorine and fluorine is founding slag.
3. contain the method for the zinc material direct producing high-grade zinc oxide of high chlorine and fluorine as claimed in claim 1 or 2, it is characterized in that, in step 1), the weight percent of the described zinc material containing high chlorine, fluorine is 80%.
4. contain the method for the zinc material direct producing high-grade zinc oxide of high chlorine and fluorine as claimed in claim 1 or 2, it is characterized in that, in step 1), the weight of described boiler face ash accounts for 20% of raw material gross weight.
5. contain the method for the zinc material direct producing high-grade zinc oxide of high chlorine and fluorine as claimed in claim 1 or 2, it is characterized in that, step 2) in, described total blast volume is 7270m
3/ h.
6. contain the method for the zinc material direct producing high-grade zinc oxide of high chlorine and fluorine as claimed in claim 1 or 2, it is characterized in that, step 2) in, described blast volume is 25% of total blast volume.
7. contain the method for the zinc material direct producing high-grade zinc oxide of high chlorine and fluorine as claimed in claim 1 or 2, it is characterized in that, in step 3), the furnace temperature of described zinc oxygen stove is 1100 ~ 1300 DEG C.
8. contain the method for the zinc material direct producing high-grade zinc oxide of high chlorine and fluorine as claimed in claim 3, it is characterized in that, in step 3), the furnace temperature of described zinc oxygen stove is 1100 ~ 1300 DEG C.
9. contain the method for the zinc material direct producing high-grade zinc oxide of high chlorine and fluorine as claimed in claim 1 or 2, it is characterized in that, in step 3), described tap to tap time is 2 hours.
10. contain the method for the zinc material direct producing high-grade zinc oxide of high chlorine and fluorine as claimed in claim 1 or 2, it is characterized in that, in step 4), the content of described zinc oxide is 98% ~ 99%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310644858.7A CN103834819B (en) | 2013-12-05 | 2013-12-05 | A kind of method containing the zinc material direct producing high-grade zinc oxide of high chlorine and fluorine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310644858.7A CN103834819B (en) | 2013-12-05 | 2013-12-05 | A kind of method containing the zinc material direct producing high-grade zinc oxide of high chlorine and fluorine |
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| CN103834819B true CN103834819B (en) | 2016-04-27 |
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| CN106521142B (en) * | 2016-11-28 | 2018-10-02 | 云南驰宏锌锗股份有限公司 | A method of containing high lead, fluorine, the multiple hearth furnace defluorinate of zinc material of chlorine, chlorine |
| CN111394593B (en) * | 2020-05-08 | 2021-04-23 | 中南大学 | Method for reducing fluorine and chlorine content in copper smelting flue gas |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2325402Y (en) * | 1998-04-26 | 1999-06-23 | 于天云 | Zinc slag metallurgic recovery furnace |
| CN1265428A (en) * | 2000-01-26 | 2000-09-06 | 梁峰 | Zinc oxide producing method from slag of zinc white furnace |
| CN1284571A (en) * | 2000-05-30 | 2001-02-21 | 柳州有色冶炼股份有限公司 | Process and apparatus of direct producing high-grade zinc oxide |
| CN103352128A (en) * | 2012-07-17 | 2013-10-16 | 佛山市广旭节能自动化科技有限公司 | Direct zinc-coal mixing cyclone burning type zinc oxide production system |
| CN103409646A (en) * | 2013-08-20 | 2013-11-27 | 赫章县金川锌业有限公司 | Method for preparing high-grade zinc oxide by utilizing cast iron dust |
-
2013
- 2013-12-05 CN CN201310644858.7A patent/CN103834819B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2325402Y (en) * | 1998-04-26 | 1999-06-23 | 于天云 | Zinc slag metallurgic recovery furnace |
| CN1265428A (en) * | 2000-01-26 | 2000-09-06 | 梁峰 | Zinc oxide producing method from slag of zinc white furnace |
| CN1284571A (en) * | 2000-05-30 | 2001-02-21 | 柳州有色冶炼股份有限公司 | Process and apparatus of direct producing high-grade zinc oxide |
| CN103352128A (en) * | 2012-07-17 | 2013-10-16 | 佛山市广旭节能自动化科技有限公司 | Direct zinc-coal mixing cyclone burning type zinc oxide production system |
| CN103409646A (en) * | 2013-08-20 | 2013-11-27 | 赫章县金川锌业有限公司 | Method for preparing high-grade zinc oxide by utilizing cast iron dust |
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