CN102994776B - Method for coproducing sulfuric acid, cement and zinc oxide powder by using low-grade zinc oxide ore and lead-zinc tailings - Google Patents
Method for coproducing sulfuric acid, cement and zinc oxide powder by using low-grade zinc oxide ore and lead-zinc tailings Download PDFInfo
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- CN102994776B CN102994776B CN201210409555.2A CN201210409555A CN102994776B CN 102994776 B CN102994776 B CN 102994776B CN 201210409555 A CN201210409555 A CN 201210409555A CN 102994776 B CN102994776 B CN 102994776B
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
The invention discloses a method for coproducing sulfuric acid, cement and zinc oxide powder by using low-grade zinc oxide ore and lead-zinc tailings. The method is characterized by comprising the following steps of: mixing raw materials, namely, 40-50 percent by mass of low-grade zinc oxide ore, 40-50 percent by mass of lead-zinc tailings, 0-10 percent by mass of sulphur and 0-10 percent by mass of coke powder, and then crushing the mixture to 150-200 meshes, then calcining the crushed mixture in a furnace in fluid bed at the temperature of 1100-1400 DEG C, collecting kiln gas, namely SO2, from the top end of the furnace in fluid bed first, and carrying out purification, conversion and absorption on SO2 to obtain sulfuric acid with H2SO4 content being more than or equal to 98 percent; and introducing Zn steam to an oxidation chamber at the middle part of the furnace in fluid bed by using a draught fan to obtain zinc oxide powder, carrying out high-temperature calcination and shock chilling on the mixture to obtain cement admixture, and adding cement clinker to the cement admixture and carrying out ball grinding on the mixture to obtain cement. According to the method disclosed by the invention, a large quantity of lead-zinc tailings and low-grade zinc oxide ore are consumed, the triple products are obtained while the environmental pollution and the potential safety hazards are solved, and the purposes of making wastes profitable and recycling resources are achieved.
Description
Technical field
The present invention relates to a kind of method take low-grade zinc oxide ore and Pb-Zn tailings as raw material co-producing sulfuric acid, cement and oxide powder and zinc.
Background technology
Enter 21 century, green, environmental protection becomes the theme in the world, and along with the high speed development that Chinese national economy is built, energy-conservation, reduction of discharging, low-carbon (LC) and recycling economy become the fundamental policy of China.Building material industry is the industry of eating quantity of slag maximum, is bearing the heavy burden of recycling economy.
Southwestern China area zinc oxide ore aboundresources, the grade of zinc oxide rich ore is at 25%-35%, the low-grade zinc oxide ore that belongs to that grade is less than 15%, the low-grade zinc oxide ore resource in Er Wo city accounts for sizable proportion.The ore dressing of low-grade zinc oxide ore is because the mineral species relating to is many, in mineral, except plumbous Zinc oxide beyond the region of objective existence, also contains the more carbonate of the sulfide mineral of a certain amount of lead, zinc, iron etc. and content, is quartz and silicate minerals.Therefore beneficiation reagent kind is many, consumption is large, flow process is complicated, metal recovery rate is low, and owing to containing the iron mineral such as limonite, pyrrhosiderite of more easy argillization in mineral, now amine method floatation process exists in zinc oxide ore dressing that index is undesirable, flow process bad adaptability, operation control the problems such as difficulty is large.
Dragon's pool township of strata in Shizhu, Chongqing county is one of important producing region of plumbous zinc ore, the plumbous zinc ore of a large amount of high-quality that distributing, for a long time due to the reason such as fund and mismanagement, in the process of the plumbous zinc ore of exploitation, only live again to produce and ignore Pollution abatement in a lot of mining areas, and mining area soil and environment has around been caused to serious impact.Heavy metals mining area has caused the serious heavy metal contamination of soil and river by release and migration under earth's surface biological geochemistry process, and these contaminated water enter farm crop by irrigation method, and enter human body by food chain, people and animals' existence, health and living environment near mining area are constituted a serious threat.Therefore how rationally to utilize low-grade zinc oxide ore and Pb-Zn tailings to become local urgent problem.
Summary of the invention
The object of the present invention is to provide a kind of method of utilizing low-grade zinc oxide ore and Pb-Zn tailings co-producing sulfuric acid, cement and oxide powder and zinc.
The present invention is achieved in that a kind of method of utilizing low-grade zinc oxide ore and Pb-Zn tailings co-producing sulfuric acid, cement and oxide powder and zinc, it is characterized in that: raw material low-grade zinc oxide ore 40-50 ﹪ by mass percentage, Pb-Zn tailings 40-50 ﹪, sulphur 0-10 ﹪ and coke powder 0-10% are crushed to 150-200 order after mixing, then mixture is sent into calcining at 1100-1400 ℃ in fluidizing furnace, first collected kiln gas SO on fluidizing furnace top
2, SO
2obtain containing H through purifying, transform, absorb, again transform, absorb operation
2sO
4>=98% sulfuric acid; Then at fluidizing furnace middle part, by induced draft fan, Zn steam is introduced to oxidizing chamber and make oxide powder and zinc through oxidation; Mixture quenching after high-temperature calcination obtains cement admixture, adds cement clinker to mix rear ball milling and obtain cement in this cement admixture.
Sulfate radical content in Pb-Zn tailings is at 42.1 ℅, in low-grade zinc oxide ore, the content of sulfate radical and zinc is respectively 6.35% and 6.59%, in mixed material, the content of sulfate radical can meet the content requirement that can not make the flame-out sulfate radical of fluidizing furnace in fluidizing furnace while calcining, and the sulfate radical in compound is decomposed into SO under fluidizing furnace high temperature
2, decompose the SO producing
2flue gas enters " double conversion and double absorption " relieving haperacidity workshop section on fluidizing furnace top generates sulfuric acid through cooling system.And zinc element in batch mixing forms zinc fume through high-temp combustion during at 1100 ℃, draw by induced draft fan at fluidizing furnace middle part, make zinc oxide through oxidation, then acidleach is electrolyzed to produce zinc ingot metal.Batch mixing is discharged as slag after high-temperature calcination, and slag is used for making cement as cement admixture, therefore realizes three coproduction of sulfuric acid, oxide powder and zinc and cement.
In technique scheme: described Sulfur from Sulphur content is greater than 99%.
In technique scheme: the above-mentioned cement admixture that described cement is 45-50% by mass percent and the cement clinker of 50-55% are made.
Beneficial effect: the present invention consumes lead-zinc ore tailings and low-grade zinc oxide ore in a large number, when solving problem of environmental pollution and potential safety hazard, obtains three joint product, reaches and turns waste into wealth, the object of recycle.
Embodiment
Below in conjunction with specific embodiment, the present invention is described further
Take lead-zinc ore tailings and low-grade zinc oxide ore as main raw material, their main component is in table 1, after being mixed according to the proportioning of embodiment 1-4 in table 2 respectively, low-grade zinc oxide ore, Pb-Zn tailings, sulphur and coke powder be crushed to 150-200 order, then mixture is sent in fluidizing furnace and calcined in 1100 ℃-1400 ℃, first collect kiln gas SO2, SO on fluidizing furnace top
2obtain the sulfuric acid containing H2SO4>=98% through purifying, transform, absorb, again transform, absorb operation (double conversion and double absorption technique); Approximately 1100 ℃ time, Zn becomes Zn steam, at fluidizing furnace middle part, by induced draft fan by Zn steam introduce oxidizing chamber oxidation, sedimentation, cooling, gathering dust obtains oxide powder and zinc, then acidleach is electrolyzed to produce zinc ingot metal.Batch mixing quenching after high-temperature calcination obtains cement admixture.The cement admixture that is 45-50% according to mass percent and the cement clinker of 50-55%, by making cement through ball milling after cement admixture and cement clinker mixing, are realized the coproduction of sulfuric acid, oxide powder and zinc and cement.
The main component of table 1 low-grade zinc oxide ore and Pb-Zn tailings
The proportioning of the each raw material of table 2 embodiment 1-4
The sulfuric acid that table 3 is finally produced according to the proportioning of embodiment 1-4 and the amount of oxide powder and zinc
Claims (3)
1. one kind is utilized the method for low-grade zinc oxide ore and Pb-Zn tailings co-producing sulfuric acid, cement and oxide powder and zinc, it is characterized in that: raw material low-grade zinc oxide ore 40-50 ﹪ by mass percentage, Pb-Zn tailings 40-50 ﹪, after mixing, sulphur 10 ﹪ and/or coke powder 10% be crushed to 150-200 order, then mixture is sent into calcining at 1100-1400 ℃ in fluidizing furnace, first collected kiln gas SO on fluidizing furnace top
2, SO
2obtain containing H through purifying, transform, absorb, again transform, absorb operation
2sO
4>=98% sulfuric acid; Then at fluidizing furnace middle part, by induced draft fan, Zn steam is introduced to oxidizing chamber and make oxide powder and zinc through oxidation; Mixture quenching after high-temperature calcination obtains cement admixture, adds cement clinker to mix rear ball milling and obtain cement in this cement admixture.
2. the method for utilizing according to claim 1 low-grade zinc oxide ore and Pb-Zn tailings co-producing sulfuric acid, cement and oxide powder and zinc, is characterized in that: described Sulfur from Sulphur content is greater than 99%.
3. the method for utilizing according to claim 1 low-grade zinc oxide ore and Pb-Zn tailings co-producing sulfuric acid, cement and oxide powder and zinc, is characterized in that: the above-mentioned cement admixture that described cement is 45-50% by mass percent and the cement clinker of 50-55% are made.
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| CN201210409555.2A CN102994776B (en) | 2012-10-24 | 2012-10-24 | Method for coproducing sulfuric acid, cement and zinc oxide powder by using low-grade zinc oxide ore and lead-zinc tailings |
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| CN201210409555.2A CN102994776B (en) | 2012-10-24 | 2012-10-24 | Method for coproducing sulfuric acid, cement and zinc oxide powder by using low-grade zinc oxide ore and lead-zinc tailings |
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| CN102994776A CN102994776A (en) | 2013-03-27 |
| CN102994776B true CN102994776B (en) | 2014-05-14 |
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Citations (6)
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| CN1107895A (en) * | 1994-03-02 | 1995-09-06 | 张振逵 | Technology and equipment for coproducing zinc sulfate and lead concentrate |
| CN101492773A (en) * | 2009-03-13 | 2009-07-29 | 内黄县鑫虹化工厂 | Process and system for recycling lead-zinc furnace cinder |
| CN101514399A (en) * | 2009-04-03 | 2009-08-26 | 郴州市宇腾化工有限公司 | Balancing lead smelting process for comprehensive resource utilization and device thereof |
| CN101608266A (en) * | 2009-07-23 | 2009-12-23 | 广西冶金研究院 | A kind of cleaning collecting method and device thereof of the zinc oxide that volatilizees |
| CN101705366A (en) * | 2009-11-23 | 2010-05-12 | 长沙有色冶金设计研究院 | Direct lead smelting method for processing zinc smelting slag by matching |
| CN201583137U (en) * | 2009-12-08 | 2010-09-15 | 郴州丰越有色金属冶炼有限公司 | Boiling-bed roaster |
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2012
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1107895A (en) * | 1994-03-02 | 1995-09-06 | 张振逵 | Technology and equipment for coproducing zinc sulfate and lead concentrate |
| CN101492773A (en) * | 2009-03-13 | 2009-07-29 | 内黄县鑫虹化工厂 | Process and system for recycling lead-zinc furnace cinder |
| CN101514399A (en) * | 2009-04-03 | 2009-08-26 | 郴州市宇腾化工有限公司 | Balancing lead smelting process for comprehensive resource utilization and device thereof |
| CN101608266A (en) * | 2009-07-23 | 2009-12-23 | 广西冶金研究院 | A kind of cleaning collecting method and device thereof of the zinc oxide that volatilizees |
| CN101705366A (en) * | 2009-11-23 | 2010-05-12 | 长沙有色冶金设计研究院 | Direct lead smelting method for processing zinc smelting slag by matching |
| CN201583137U (en) * | 2009-12-08 | 2010-09-15 | 郴州丰越有色金属冶炼有限公司 | Boiling-bed roaster |
Non-Patent Citations (4)
| Title |
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| 低品位氧化铅锌矿硫化—浮选工艺及理论研究;李勇;《中国博士学位论文全文数据库-工程科技Ⅰ辑 》;20120131;B021-22 * |
| 我国铅锌矿资源特点及开发利用现状;雷力;《矿业快报》;20070930(第461期);第1-4页 * |
| 李勇.低品位氧化铅锌矿硫化—浮选工艺及理论研究.《中国博士学位论文全文数据库-工程科技Ⅰ辑 》.2012,B021-22. |
| 雷力.我国铅锌矿资源特点及开发利用现状.《矿业快报》.2007,(第461期),1-4. |
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