CN102491286B - Selenium extraction method of selenium-containing bone coal - Google Patents
Selenium extraction method of selenium-containing bone coal Download PDFInfo
- Publication number
- CN102491286B CN102491286B CN201110376679.0A CN201110376679A CN102491286B CN 102491286 B CN102491286 B CN 102491286B CN 201110376679 A CN201110376679 A CN 201110376679A CN 102491286 B CN102491286 B CN 102491286B
- Authority
- CN
- China
- Prior art keywords
- selenium
- bone coal
- coal
- cigarette ash
- ore
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Landscapes
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
A selenium extraction method of selenium-containing bone coal relates to the technical field of bone coal generation and selenium extraction comprehensive utilization and is characterized by comprising the following steps of: mixing selenium-containing bone coal with raw coal at the ratio of 7:3 or 8:2, carrying out high temperature oxidation and combustion in a circulating fluidized bed or rotary kiln of a power plant so as to oxidize stable sulfur selenium ore, copper selenium ore and sulfur iron selenium ore in the bone coal to obtain a selenium oxide gas which can be easily absorbed by an absorbent, allowing the selenium oxide gas with flue gas to enter into a dust collector, collecting dust by the dust collector, processing the dust, enriching selenium oxide, and reducing into the industrial finished product selenium. According to the invention, without increasing the cost and equipment of the power plant and without changing present power plant technologies, the selenium ore resource which originally can not be recovered or have low utilization rate is fully utilized during the power generation, thus reaching considerable economic benefits, realizing the effect of comprehensive utilization and simultaneously achieving a certain social benefit of protecting mountain environments.
Description
Technical field
The present invention relates to bone coal generating and put forward selenium technical field of comprehensive utilization, being specifically related to a kind of selenium bone coal that contains and putting forward selenium method.
Background technology
Bone coal is a kind of many metals symbiosis shale ore, has the advantages that high ash, lower calorific value and hardness are large, is dispersed throughout China Hunan, Hubei Province, river etc. more than 20 and economizes.Bone coal both can make inferior fuel, also can therefrom extract many clocks rare metal, and Qi Zhongfan, selenium are main valuable metals.
And concerning China's Thermal Power Generation Industry, need to use a large amount of fire coals, and price coal-fired was over the past two years higher, caused Thermal Power Generation Industry to be in the difficult situation of lossing state for a long time.And for the provinces and cities that part coal resources lack, the fire coal of thermal power plant also needs to buy from other provinces, and cost is higher.Utilize containing the generating of selenium bone coal, if selenium is not reclaimed, selenium, is not only polluted local water source in air by smoke stack emission, and pollutes local vegetation.To suck poisonous selenium gas easily poisoning for human body in addition.Secondly, selenium is rare and scatter element, expensive, reclaims it, is unlikely to cause the wasting of resources, obtains considerable economic benefit simultaneously.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of increases economic efficiency, selenium method put forward by the selenium bone coal that contains of social benefit, saving coal resources.
Technical problem to be solved by this invention realizes by the following technical solutions,
Selenium method put forward by a kind of selenium bone coal that contains, and it is characterized in that: its method steps is,
1, first mix containing the ratio of selenium bone coal with raw coal 7: 3 or 8: 2, burnt by 800-1200 DEG C of high temperature oxidation at power station circulating fluidized bed or rotary kiln, sulphur selenium ore deposit stable in bone coal, copper selenium ore deposit, the oxidation of sulphur iron selenium ore deposit is made to become the selenium oxide gas that absorption agent easily absorbs, along with cigarette ash enters flue;
2, in flue, the cigarette ash containing selenium oxide gas is collected by dust-precipitator;
3, in the cigarette ash collected, add water and absorption agent carry out leachings and process;
4, filtration treatment is carried out to the cigarette ash after leaching process and liquid;
5, the leached mud filtered out is collected, use as building materials or cement additire;
6, in leach liquor, add reductive agent, carry out reducing heavy selenium, extract finished industrial product selenium.
Described absorption agent is sodium carbonate.
Described reductive agent is S-WAT.
The invention has the beneficial effects as follows:
1. protect local atmospheric environment, solve selenium contamination problem, the selenium content burning slag and cigarette ash drops to below 5PPM, and this slag and ash can not produce pollution to environment, are convenient to downstream and do building material product and cement additire; And do not add and put forward selenium operation and discharge lime-ash containing more than selenium 800PP, downstream can not utilize.
2. reach containing selenium bone coal comprehensive utilization effect, not only generate electricity but also carry selenium.
3. significant economic benefit and social benefit is achieved, save coal resources, raw coal more than 70% can be saved with bone coal generating, extraction cost only needs 1/3rd of normal production cost, chimney Exhaust Gas is containing selenium 5mg/m3, reach discharging standards, do not add and carry selenium operation Exhaust Gas containing selenium 5000mg/m3, far beyond discharging standards.
Accompanying drawing explanation
Fig. 1 is principle of the invention schematic diagram.
Embodiment
The technique means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
As shown in Figure 1, selenium method put forward by a kind of selenium bone coal that contains, and its method steps is,
1, first will mix in 8: 2 ratios with raw coal containing selenium bone coal, burnt by 800-1200 DEG C of high temperature oxidation at power station circulating fluidized bed or rotary kiln, sulphur selenium ore deposit stable in bone coal, copper selenium ore deposit, the oxidation of sulphur iron selenium ore deposit is made to become the selenium oxide gas that absorption agent easily absorbs, along with cigarette ash enters flue, its oxidation reaction process is, CuSe+O
2→ CuO+SeO
2↑, FeS+FeSe → Fe
2o
3+ SO
2↑+SeO
2↑;
2, in flue, the cigarette ash containing selenium oxide gas is collected by dust-precipitator;
3, in the cigarette ash collected, add water and sodium carbonate carry out leachings and process, selenium is fixed absorption and gets off;
4, filtration treatment is carried out to the cigarette ash after leaching process and liquid;
5, the leached mud filtered out is collected, use as building materials or cement additire;
6, in leach liquor, add reductive agent S-WAT, carry out reducing heavy selenium, extract finished industrial product selenium, wherein heavy selenium reaction process is: SeO
2+ H
2o+ absorption agent+reductive agent → Se ↓+an alkali metal salt.
Selenium bone coal is contained by average selenium content 400PPM in the present embodiment; need 2,050,000 tons of bone coals 2 × 30MW power station year; the rate of recovery is by 50%; year produces 410 tons, selenium; nearly 500,000,000 yuan of enforcement sale income; the present invention is utilized not increase power plant cost and equipment; do not change existing power station technique; while generating; originally the selenium ore resources cannot recycled or utilization ratio is very low is fully utilized; reach considerable economic benefit, thus reach the effect of comprehensive utilization, protect mountain area environment to obtain certain social benefit simultaneously.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (1)
1. put forward selenium method containing selenium bone coal, it is characterized in that: its method steps is,
A, first to mix containing the ratio of selenium bone coal with raw coal 7: 3 or 8: 2, burnt by 800-1200 DEG C of high temperature oxidation at power station circulating fluidized bed or rotary kiln, sulphur selenium ore deposit stable in bone coal, copper selenium ore deposit, the oxidation of sulphur iron selenium ore deposit is made to become the selenium oxide gas that sodium carbonate easily absorbs, along with cigarette ash enters flue;
B, collect containing the cigarette ash of selenium oxide gas by dust-precipitator;
C, in the cigarette ash collected, add water and sodium carbonate carry out leachings and process;
D, to leach process after cigarette ash and liquid carry out filtration treatment;
E, the leached mud filtered out to be collected, use as building materials or cement additire;
F, in leach liquor, add S-WAT, carry out reducing heavy selenium, extract finished industrial product selenium; Wherein heavy selenium reaction process is: SeO
2+ H
2o+ sodium carbonate+S-WAT → Se ↓+an alkali metal salt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110376679.0A CN102491286B (en) | 2011-11-23 | 2011-11-23 | Selenium extraction method of selenium-containing bone coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110376679.0A CN102491286B (en) | 2011-11-23 | 2011-11-23 | Selenium extraction method of selenium-containing bone coal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102491286A CN102491286A (en) | 2012-06-13 |
| CN102491286B true CN102491286B (en) | 2015-04-08 |
Family
ID=46183157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110376679.0A Expired - Fee Related CN102491286B (en) | 2011-11-23 | 2011-11-23 | Selenium extraction method of selenium-containing bone coal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102491286B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964402A (en) * | 2013-02-06 | 2014-08-06 | 安徽省思达新材料科技有限公司 | Method for utilizing solid industrial waste containing trace selenium to extract high-purity selenium for new materials |
| CN104775032A (en) * | 2015-03-06 | 2015-07-15 | 河南中原黄金冶炼厂有限责任公司 | Method for separating selenium and mercury from acid mud produced in acid preparation through roasting of gold concentrate |
| CN107673315A (en) * | 2017-10-19 | 2018-02-09 | 河北工程大学 | A kind of method using the extraction selenium of bone coal containing selenium |
| CN115505759A (en) * | 2022-09-07 | 2022-12-23 | 北京华能长江环保科技研究院有限公司 | Fluidized bed system for comprehensive utilization of stone coal for extracting selenium and vanadium and comprehensive utilization method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1302774A (en) * | 2000-01-04 | 2001-07-11 | 赵善茂 | Powdered coal ash rich in Se and Ge elements and its application |
-
2011
- 2011-11-23 CN CN201110376679.0A patent/CN102491286B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1302774A (en) * | 2000-01-04 | 2001-07-11 | 赵善茂 | Powdered coal ash rich in Se and Ge elements and its application |
Non-Patent Citations (2)
| Title |
|---|
| "恩施州富硒资源的分布及其开发利用";张友安;《资源开发与市场》;19941231;第10卷(第4期);第161-162页 * |
| 孙镧弟."从石煤原矿中直接回收硒".《上海金属(有色分册)》.1989,第10卷(第4期),第56-57页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102491286A (en) | 2012-06-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107377598B (en) | Electronic waste recycling system | |
| CN104911356A (en) | Comprehensive recovery technology of solid waste gas ash and zinc-containing ferrovanadium slag | |
| CN107083488B (en) | A kind of waste lead acid battery lead cream bath smelting processing method | |
| CN102399995B (en) | Method for extracting lead-zinc oxide by utilizing zincilate volatilization kiln | |
| CN101942562A (en) | Harmless treatment technology of main metal tailings | |
| CN103964402A (en) | Method for utilizing solid industrial waste containing trace selenium to extract high-purity selenium for new materials | |
| CN203728902U (en) | Integrated solid waste gas ash and zinc-containing ferrovanadium slag recovery device | |
| CN101386481B (en) | Method for producing portland cement clinker using domestic waste flying ash | |
| CN106399699A (en) | Process for treating sludge with copper import | |
| CN102491286B (en) | Selenium extraction method of selenium-containing bone coal | |
| CN111410446B (en) | Method and production system for recycling solid waste in aluminum industry by rotary kiln | |
| CN103866131B (en) | A kind of containing zinc blast furnace dedusting ash renewable resources treatment process | |
| CN102690945A (en) | Method for recycling low-grade lead and zinc in pyrite cinder | |
| CN112899488A (en) | Method for co-processing blast furnace cloth bag fly ash and sintering machine head fly ash | |
| CN109680156A (en) | A kind of waste incineration and generating electricity cinder resourceization utilizes system and method | |
| CN209210894U (en) | Zinc-Bearing Wastes extract secondary zinc oxide device | |
| CN108034829A (en) | A kind of method of the bag-type dust ash production containing scum and high zinc material | |
| JP6327943B2 (en) | Method for recovering valuable metals in waste | |
| CN106222423A (en) | The danger of one heavy metal species is useless processes Processes and apparatus | |
| CN111041213A (en) | Method for treating electroplating sludge by adopting bottom-blowing molten pool smelting process | |
| CN213671076U (en) | Incineration fly ash grading heat purification device based on carbon thermal reduction | |
| CN103143251B (en) | Purification method for industrial emission gas | |
| CN104962751A (en) | Pretreatment gold extraction method of low-grade breccia type difficultly-treated gold ore | |
| CN101972588A (en) | Coal-fired flue gas pyrolusite pulp recycling denitration method | |
| CN102393147B (en) | Comprehensive processing process for sintering smoke gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 Termination date: 20191123 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |