CN101935765A - Bottom blowing fuming zinc-extracting method for material containing zinc - Google Patents
Bottom blowing fuming zinc-extracting method for material containing zinc Download PDFInfo
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Abstract
The invention discloses a bottom blowing fuming zinc-extracting method for a material containing zinc, comprising the following steps of: continuously feeding raw materials of the material containing zinc, cobbles, coal and iron slag into a bottom blowing smelting furnace for smelting from a feed opening of the bottom blowing smelting furnace; controlling the temperature of the bottom blowing smelting furnace to be 1,000-1,300DEG C in the smelting process; blowing oxygen and natural gas into a slag pool of the bottom blowing smelting furnace by using a gas spray gun from the bottom of the bottom blowing smelting furnace in the smelting process for reducing reaction; discharging smelt slag after being smelt; and exhausting the volatized zinc steam from a smoke outlet port of the bottom blowing smelting furnace in the smelting process to a dust collecting system to be re-oxidized into oxidized zinc powder and obtain the finished zinc oxide. The technical scheme can accelerate the production process, shorten the furnace time, reduce the material consumption, improve the quality of zinc oxide products and remarkably reduce the cost for ton processing; in addition, in the production process, by using natural gas and pure oxygen to replace coal dust, coke granules and the like, the invention ensures clean production process and less pollution and is beneficial to environmental protection.
Description
Technical field:
The present invention relates to a kind of Metal smelting method of field of metallurgy, particularly relate to a kind of bottom blowing fuming Zn extraction method of material containing zinc.
Background technology
Material containing zinc have in plumbum smelting slag, the zinc hydrometallurgy process in soak slag and partial oxidation zinc ore etc.
For zinciferous plumbum smelting slag, the at present domestic fuming furnace that adopts is handled more, after soon coal cinder will be worn into certain particle size, once, under the conveying of secondary compressed air, be blown in the plumbum smelting slag and (contain Pb 1～5% in the plumbum smelting slag usually, ZnO 10～19%), rely on the throughput ratio of regulating pressurized air and fine coal, in fuming furnace, form stronger reducing atmosphere, lead in the blast-furnace cinder, zinc are come out so that the metallic vapor form is volatilized, the metallic vapor that volatilization is got up is oxidized to oxide compound again at the tertiary air orifice place, becomes product after gathering dust.Though this treatment process can make the metal in the slag fully volatilize, exist the shortcoming that coal dust consumption big (～200Kg/t slag), every stove production time such as grow (for up to 80～160 minutes), can only be interrupted productions more than (per 24 hours produce 8～16 stoves), ton product processing charges height and the sulfur dioxide emissions at the aspect.In order to improve these shortcomings, the oxygen-rich air that has research to attempt with 22～30% replaces pressurized air, carries out oxygen-enriched fuming.This method is compared with pressurized air, improves to some extent though oxygen-enriched fuming contains aspect indexs such as zinc at tooling cost, waste, and effect is not fairly obvious.
Soak slag in producing in the conventional zinc hydrometallurgy process, the at present domestic rotary kilns that adopt are handled more, and minority producer handles with fuming furnace.The technical process of handling with rotary kiln probably is: in soak the slag drying after, allocate the burnt grain about 50% into, add and force volatilization in the rotary kiln.Though soak zinc content＜1% of slag during this treatment process can make, also exist SO in the tail gas after coke powder consumption utilization ratio big, burnt grain is not high, kiln body refractory life short, operating rate is not high and rotary kiln gathers dust
2The problem of aspects such as it is seriously polluted to exceed standard.
For the partial oxidation zinc ore, the domestic and international at present technology to its processing mostly is: earlier zinc oxide ore is directly leached, leach ore pulp, filter the back to leach liquor extract again, back extraction, solution after the back extraction is through charcoal absorption, remove organism after, incorporate into again in the main flow of conventional zinc hydrometallurgy and go, though this method makes the rate of recovery of zinc higher, also obviously exist the shortcoming that the organic reagent consumption is big, tooling cost is higher.
At present, the bibliographical information about smelting process also has much.For example: 1, application number is 200910012388.6, denomination of invention is " a kind of method of smelting zinc by electric heating rotary kiln ", this invention is to adopt the smelting zinc by electric heating rotary kiln device, by mixing, preheating and the still-process of raw material, from zinc ore, under the state of sealing, extract the zinc metal.2, application number is that 200610128474.X, denomination of invention are " oxygen-enriched fuming Zn extraction process of plumbum smelting slag ", this invention is to utilize gas blower that fine coal, air are fed in the slag of fuming furnace, plumbous oxide and zinc oxide in the slag are restored with the elemental metals state, after the airborne oxygen that stove top tertiary air orifice is mended carried out oxidation, output was the secondary zinc oxide product of main component with zinc oxide.
Summary of the invention
The technical problem to be solved in the present invention: overcome at present the defective that the processing of soaking slag and partial oxidation zinc ore in plumbum smelting slag, the zinc hydrometallurgy process is existed, a kind of bottom blowing fuming Zn extraction method of material containing zinc is provided.Technical solution of the present invention can the faster production process, when shortening stove, reduce consumptive material, and can improve the quality of zinc oxide product, obviously reduce a ton tooling cost.
In order to address the above problem, the technical solution used in the present invention is:
The invention provides a kind of bottom blowing fuming Zn extraction method of material containing zinc, the detailed process of described bottom blowing fuming Zn extraction method is:
With the raw material material containing zinc, stone, coal and scum, send into continuously from the charging opening of bottom-blown smelting stove and to carry out melting the bottom-blown smelting stove, stone, the percentage that the add-on of coal and scum accounts for the material containing zinc gross weight is respectively 2～5%, 3～10% and 0～15%, temperature in the fusion process in the control bottom blowing oxidation smelting furnace is 1000～1300 ℃, in fusion process from the bottom-blown smelting furnace bottom, utilize gas spray gun Sweet natural gas and oxygen to be blown in the slag bath of bottom-blown smelting stove and carry out reduction reaction, in the bottom-blown smelting stove material is carried out melting reaction 3～5h, emitting smelting slag after the melting is waste; The zinc fume that volatilization produces in the fusion process is discharged by the smoke outlet of bottom-blown smelting stove, enters dust collecting system and is oxidized to oxide powder and zinc again, promptly obtains finished product zinc oxide.
According to the bottom blowing fuming Zn extraction method of above-mentioned material containing zinc, the shared weight percentage of zinc is 5～40% in the described material containing zinc; Described material containing zinc be in plumbum smelting slag, the zinc hydrometallurgy process in soak slag or partial oxidation zinc ore.
According to the bottom blowing fuming Zn extraction method of above-mentioned material containing zinc, the granularity of described stone, coal and scum is 3～6cm.
According to the bottom blowing fuming Zn extraction method of above-mentioned material containing zinc, described raw material to be sent into the bottom-blown smelting stove process continuously from the charging opening of bottom-blown smelting stove, its feeding amount is 1～10t/h.
According to the bottom blowing fuming Zn extraction method of above-mentioned material containing zinc, describedly in fusion process, be blown into Sweet natural gas and oxygen from the bottom-blown smelting furnace bottom, its Sweet natural gas consumption is 25～50Nm
3/ t material containing zinc, amount of oxygen are (25～50) * 1.8Nm
3/ t material containing zinc.
According to the bottom blowing fuming Zn extraction method of above-mentioned material containing zinc, described concentration of oxygen is 30～100%; CH in the composition of described Sweet natural gas
4Shared weight percentage＞85%.
According to the bottom blowing fuming Zn extraction method of above-mentioned material containing zinc, when the temperature of described bottom blowing oxidation smelting furnace surpasses 1300 ℃, be blown into nitrogen from bottom blowing oxidation smelting furnace bottom and regulate the temperature of smelting furnace at 1000～1300 ℃.
According to the bottom blowing fuming Zn extraction method of above-mentioned material containing zinc, described when being blown into nitrogen nitrogen flow be 30～150Nm
3/ h.
According to the bottom blowing fuming Zn extraction method of above-mentioned material containing zinc, emit the slagging time 15～30min of smelting slag after the described melting.
According to the bottom blowing fuming Zn extraction method of above-mentioned material containing zinc, zinciferous weight percentage is 60～75% in the described finished product zinc oxide; Zinciferous weight percentage＜2% in the described waste.
Positive beneficial effect of the present invention:
1, the material containing zinc that the present invention relates to have in plumbum smelting slag, the zinc hydrometallurgy process in soak slag or partial oxidation zinc ore.The present invention utilizes oxygen bottom-blowing stove, oxygen and Sweet natural gas, coal cinder to do fuel and reductive agent these material containing zincs, replaces traditional fuming furnace and rotary kiln, carries out production higher-grade, high-quality zinc oxide product.Compare with traditional fuming furnace, rotary kiln (or Weir stove) now treatment process, the inventive method makes not only that production process is accelerated, shorten during stove, consumptive material reduces, and has improved the quality of zinc oxide product, obviously reduced a ton tooling cost.Shorten 10～40min when the inventive method can be with stove, consumption of coal reduces about 10%, and the ton tooling cost reduces about 200 yuan, and the content of zinc oxide is up to 75% in the gained zinc oxide product.
2, technical solution of the present invention is compared with other traditional treatment method, major advantage of the present invention: ⑴, does not need to add fine coal or burnt grain, and the amount of allocating into of coal cinder is few, only is 3～10% of raw material; ⑵, smelting intensity height, the stove processing power is big; ⑶, ton zinc oxide tooling cost are lower; ⑷ in, production environment and the production process, owing to use Sweet natural gas and pure oxygen to replace coal dust, Jiao Li etc., production process cleans, pollutes few, helps environment protection.⑸, do not need to adopt a large amount of organic chemical reagents.
Four, embodiment:
Following examples only in order to further specify the present invention, do not limit content of the present invention.
Embodiment 1:
A kind of bottom blowing fuming Zn extraction method of material containing zinc, the detailed process of described bottom blowing fuming Zn extraction method is as follows:
With raw material 3t plumbum smelting slag (the shared weight percentage of zinc is 5～12% in the plumbum smelting slag), (granularity of stone and coal is 3～6cm) for stone and coal, send into continuously from the charging opening of bottom-blown smelting stove and to carry out melting the bottom-blown smelting stove, the feeding amount is 4t/h, the percentage that the add-on of stone and coal accounts for the plumbum smelting slag gross weight is respectively 3% and 8%, the temperature of control bottom blowing oxidation smelting furnace is 1200 ℃ in the fusion process, in fusion process from the bottom-blown smelting furnace bottom, utilize gas spray gun Sweet natural gas and oxygen to be blown in the slag bath of bottom-blown smelting stove and carry out reduction reaction, the Sweet natural gas consumption is according to 120Nm
3/ (3t plumbum smelting slag) is blown into, and amount of oxygen is according to 216Nm
3/ (3t plumbum smelting slag) is blown into, and in the bottom-blown smelting stove material being carried out melting reaction 3h(is that the flow of Sweet natural gas is 40Nm
3/ h, the flow of oxygen are 72Nm
3/ h), emitting smelting slag after the melting is that (after testing: zinciferous weight percentage＜2% in the waste), the time of emitting smelting slag is 20～25min to waste; The zinc fume that volatilization produces in the fusion process is discharged by the smoke outlet of bottom-blown smelting stove, enters dust collecting system and is oxidized to oxide powder and zinc again, be i.e. finished product zinc oxide (after testing: zinciferous weight percentage is 65～72% in the finished product zinc oxide).
Embodiment 2:
A kind of bottom blowing fuming Zn extraction method of material containing zinc, the detailed process of described bottom blowing fuming Zn extraction method is as follows:
Slag (in the zinc hydrometallurgy process in soak the shared weight percentage of zinc is 15～25% in the slag) will be soaked in the raw material 3t zinc hydrometallurgy process, (granularity of stone and coal is 3～6cm) for stone and coal, send into continuously from the charging opening of bottom-blown smelting stove and to carry out melting the bottom-blown smelting stove, the feeding amount is 6t/h, the add-on of stone and coal account in the zinc hydrometallurgy process in soak the slag gross weight percentage be respectively 5% and 10%, the temperature of control bottom blowing oxidation smelting furnace is 1250 ℃ in the fusion process, in fusion process from the bottom-blown smelting furnace bottom, utilize gas spray gun Sweet natural gas and oxygen to be blown in the slag bath of bottom-blown smelting stove and carry out reduction reaction, the Sweet natural gas consumption is according to 140Nm
3/ (in the 3t zinc hydrometallurgy process in soak slag) is blown into, and amount of oxygen is according to 252Nm
3/ (in the 3t zinc hydrometallurgy process in soak slag) is blown into, and in the bottom-blown smelting stove material being carried out melting reaction 4h(is that the flow of Sweet natural gas is 35Nm
3/ h, the flow of oxygen are 63Nm
3/ h), emitting smelting slag after the melting is that (after testing: zinciferous weight percentage＜2% in the waste), the time of emitting smelting slag is 25～30min to waste; The zinc fume that volatilization produces in the fusion process is discharged by the smoke outlet of bottom-blown smelting stove, enters dust collecting system and is oxidized to oxide powder and zinc again, be i.e. finished product zinc oxide (after testing: zinciferous weight percentage is 67～75% in the finished product zinc oxide).
Embodiment 3:
A kind of bottom blowing fuming Zn extraction method of material containing zinc, the detailed process of described bottom blowing fuming Zn extraction method is as follows:
With raw material 3t zinc oxide ore (the shared weight percentage of zinc is 20～40% in the zinc oxide ore), (granularity of stone and coal is 3～6cm) for stone and coal, send into continuously from the charging opening of bottom-blown smelting stove and to carry out melting the bottom-blown smelting stove, the feeding amount is 3t/h, the percentage that the add-on of stone and coal accounts for the zinc oxide ore gross weight is respectively 2% and 5%, the temperature of control bottom blowing oxidation smelting furnace is 1100 ℃ in the fusion process, in fusion process from the bottom-blown smelting furnace bottom, utilize gas spray gun Sweet natural gas and oxygen to be blown in the slag bath of bottom-blown smelting stove and carry out reduction reaction, the Sweet natural gas consumption is according to 110Nm
3/ (3t zinc oxide ore) is blown into, and amount of oxygen is according to 198Nm
3/ (3t zinc oxide ore) is blown into, and in the bottom-blown smelting stove material being carried out melting reaction 4h(is that the flow of Sweet natural gas is 27.5Nm
3/ h, the flow of oxygen are 49.5Nm
3/ h), emitting smelting slag after the melting is that (after testing: zinciferous weight percentage＜2% in the waste), the time of emitting smelting slag is 20～25min to waste; The zinc fume that volatilization produces in the fusion process is discharged by the smoke outlet of bottom-blown smelting stove, enters dust collecting system and is oxidized to oxide powder and zinc again, be i.e. finished product zinc oxide (after testing: zinciferous weight percentage is 70～75% in the finished product zinc oxide).
Embodiment 4: substantially the same manner as Example 1, difference is:
A kind of bottom blowing fuming Zn extraction method of material containing zinc, difference from Example 1 is:
(granularity of scum is 3～6cm) to add the scum that accounts for plumbum smelting slag gross weight 8% in the raw material in addition, the feeding amount is 1t/h, the percentage that the add-on of stone and coal accounts for the plumbum smelting slag gross weight is respectively 2% and 3%, the temperature of control bottom blowing oxidation smelting furnace is 1000 ℃ in the fusion process, utilize gas spray gun Sweet natural gas and oxygen to be blown in the slag bath of bottom-blown smelting stove and carry out reduction reaction, the Sweet natural gas consumption is according to 80Nm
3/ (3t plumbum smelting slag) is blown into, and amount of oxygen is according to 144Nm
3/ (3t plumbum smelting slag) is blown into, and in the bottom-blown smelting stove material being carried out melting reaction 3h(is that the flow of Sweet natural gas is 27Nm
3/ h, the flow of oxygen are 48Nm
3/ h), the time of emitting smelting slag is 15～20min.
Embodiment 5: substantially the same manner as Example 2, difference is:
A kind of bottom blowing fuming Zn extraction method of material containing zinc, difference from Example 2 is:
Add in addition in the raw material account in the zinc hydrometallurgy process in soak the scum of slag gross weight 5% (granularity of scum be 3～6cm), the feeding amount is 3t/h, the add-on of stone and coal account in the zinc hydrometallurgy process in soak the slag gross weight percentage be respectively 4% and 6%, the temperature of control bottom blowing oxidation smelting furnace is 1050 ℃ in the fusion process, utilize gas spray gun Sweet natural gas and oxygen to be blown in the slag bath of bottom-blown smelting stove and carry out reduction reaction, the Sweet natural gas consumption is according to 130Nm
3/ (in the 3t zinc hydrometallurgy process in soak slag) is blown into, and amount of oxygen is according to 234Nm
3/ (in the 3t zinc hydrometallurgy process in soak slag) is blown into, and in the bottom-blown smelting stove material being carried out melting reaction 5h(is that the flow of Sweet natural gas is 26Nm
3/ h, the flow of oxygen are 46.8Nm
3/ h), the time of emitting smelting slag is 20～25min.
Embodiment 6: substantially the same manner as Example 3, difference is:
A kind of bottom blowing fuming Zn extraction method of material containing zinc, difference from Example 3 is:
(granularity of scum is 3～6cm) to add the scum that accounts for zinc oxide ore gross weight 12% in the raw material in addition, the feeding amount is 5t/h, the percentage that the add-on of stone and coal accounts for the zinc oxide ore gross weight is respectively 3% and 9%, the temperature of control bottom blowing oxidation smelting furnace is 1150 ℃, utilize gas spray gun Sweet natural gas and oxygen to be blown in the slag bath of bottom-blown smelting stove and carry out reduction reaction, the Sweet natural gas consumption is according to 125Nm
3/ (3t zinc oxide ore) is blown into, and amount of oxygen is according to 225Nm
3/ (3t zinc oxide ore) is blown into, and in the bottom-blown smelting stove material being carried out melting reaction 5h(is that the flow of Sweet natural gas is 25Nm
3/ h, the flow of oxygen are 45Nm
3/ h), the time of emitting smelting slag is 20～25min.
Embodiment 7: substantially the same manner as Example 1, difference is:
A kind of bottom blowing fuming Zn extraction method of material containing zinc, difference from Example 1 is:
(granularity of scum is 3～6cm) to add the scum that accounts for plumbum smelting slag gross weight 15% in the raw material in addition, the feeding amount is 9t/h, the percentage that the add-on of stone and coal accounts for the plumbum smelting slag gross weight is respectively 5% and 10%, the temperature of control bottom blowing oxidation smelting furnace is 1300 ℃, utilize gas spray gun Sweet natural gas and oxygen to be blown in the slag bath of bottom-blown smelting stove and carry out reduction reaction, the Sweet natural gas consumption is according to 130Nm
3/ (3t plumbum smelting slag) is blown into, and amount of oxygen is according to 234Nm
3/ (3t plumbum smelting slag) is blown into, and in the bottom-blown smelting stove material being carried out melting reaction 4h(is that the flow of Sweet natural gas is 32.5Nm
3/ h, the flow of oxygen are 58.5Nm
3/ h), the time of emitting smelting slag is 25～30min.
Claims (10)
1. the bottom blowing fuming Zn extraction method of a material containing zinc is characterized in that:
With the raw material material containing zinc, stone, coal and scum, send into continuously from the charging opening of bottom-blown smelting stove and to carry out melting the bottom-blown smelting stove, stone, the percentage that the add-on of coal and scum accounts for the material containing zinc gross weight is respectively 2～5%, 3～10% and 0～15%, temperature in the fusion process in the control bottom blowing oxidation smelting furnace is 1000～1300 ℃, in fusion process from the bottom-blown smelting furnace bottom, utilize gas spray gun Sweet natural gas and oxygen to be blown in the slag bath of bottom-blown smelting stove and carry out reduction reaction, in the bottom-blown smelting stove material is carried out melting reaction 3～5h, emitting smelting slag after the melting is waste; The zinc fume that volatilization produces in the fusion process is discharged by the smoke outlet of bottom-blown smelting stove, enters dust collecting system and is oxidized to oxide powder and zinc again, promptly obtains finished product zinc oxide.
2. the bottom blowing fuming Zn extraction method of material containing zinc according to claim 1, it is characterized in that: the shared weight percentage of zinc is 5～40% in the described material containing zinc; Described material containing zinc be in plumbum smelting slag, the zinc hydrometallurgy process in soak slag or partial oxidation zinc ore.
3. the bottom blowing fuming Zn extraction method of material containing zinc according to claim 1, it is characterized in that: the granularity of described stone, coal and scum is 3～6cm.
4. the bottom blowing fuming Zn extraction method of material containing zinc according to claim 1 is characterized in that: described raw material is sent into the bottom-blown smelting stove process continuously from the charging opening of bottom-blown smelting stove, its feeding amount is 1～10t/h.
5. the bottom blowing fuming Zn extraction method of material containing zinc according to claim 1 is characterized in that: describedly be blown into Sweet natural gas and oxygen from the bottom-blown smelting furnace bottom in fusion process, its Sweet natural gas consumption is 25～50Nm
3/ t material containing zinc, amount of oxygen are (25～50) * 1.8Nm
3/ t material containing zinc.
6. the bottom blowing fuming Zn extraction method of material containing zinc according to claim 5, it is characterized in that: described concentration of oxygen is 30～100%; CH in the composition of described Sweet natural gas
4Shared weight percentage＞85%.
7. the bottom blowing fuming Zn extraction method of material containing zinc according to claim 1 is characterized in that: when the temperature of described bottom blowing oxidation smelting furnace surpasses 1300 ℃, be blown into nitrogen from bottom blowing oxidation smelting furnace bottom and regulate the temperature of smelting furnace at 1000～1300 ℃.
8. the bottom blowing fuming Zn extraction method of material containing zinc according to claim 7 is characterized in that: described when being blown into nitrogen nitrogen flow be 30～150Nm
3/ h.
9. the bottom blowing fuming Zn extraction method of material containing zinc according to claim 1 is characterized in that: the slagging time 15～30min that emits smelting slag after the described melting.
10. the bottom blowing fuming Zn extraction method of material containing zinc according to claim 1, it is characterized in that: zinciferous weight percentage is 60～75% in the described finished product zinc oxide; Zinciferous weight percentage＜2% in the described waste.
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Cited By (7)
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| CN103421958A (en) * | 2013-07-23 | 2013-12-04 | 湖南水口山有色金属集团有限公司 | Method for processing zinc leaching cinder through adopting oxygen enrichment and smelting for bottom blown furnace |
| CN104630498A (en) * | 2013-11-15 | 2015-05-20 | 安阳市豫北金铅有限责任公司 | Fuming furnace and process for extracting zinc oxide by using fuming furnace |
| CN107460328A (en) * | 2017-07-31 | 2017-12-12 | 重庆科技学院 | A kind of method that lead and zinc are refined from the tutty of steel-making dust recovery |
| CN107841625A (en) * | 2017-11-10 | 2018-03-27 | 云南驰宏锌锗股份有限公司 | A kind of combined type fuel fuming furnace reduction volatilization method of smelting |
| CN108165745A (en) * | 2018-01-18 | 2018-06-15 | 河南豫光金铅股份有限公司 | A kind of method of a variety of valuable metals of jamesonite side-blown converter continuous processing synthetical recovery |
| CN111204981A (en) * | 2020-01-18 | 2020-05-29 | 河北博泰环保科技有限公司 | Direct oxygen blowing melting process of secondary kiln slag and method for preparing microcrystalline glass |
| CN113862473A (en) * | 2021-08-19 | 2021-12-31 | 济源豫光有色冶金设计研究院有限公司 | Hydrogen metallurgy fuming zinc extraction method for zinc-containing material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103421958A (en) * | 2013-07-23 | 2013-12-04 | 湖南水口山有色金属集团有限公司 | Method for processing zinc leaching cinder through adopting oxygen enrichment and smelting for bottom blown furnace |
| CN104630498A (en) * | 2013-11-15 | 2015-05-20 | 安阳市豫北金铅有限责任公司 | Fuming furnace and process for extracting zinc oxide by using fuming furnace |
| CN104630498B (en) * | 2013-11-15 | 2016-09-07 | 安阳市豫北金铅有限责任公司 | Fuming furnace and the technique extracting zinc oxide with fuming furnace |
| CN107460328A (en) * | 2017-07-31 | 2017-12-12 | 重庆科技学院 | A kind of method that lead and zinc are refined from the tutty of steel-making dust recovery |
| CN107841625A (en) * | 2017-11-10 | 2018-03-27 | 云南驰宏锌锗股份有限公司 | A kind of combined type fuel fuming furnace reduction volatilization method of smelting |
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| CN111204981B (en) * | 2020-01-18 | 2022-04-01 | 河北博泰环保科技有限公司 | Direct oxygen blowing melting process of secondary kiln slag and method for preparing microcrystalline glass |
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