CN108609749A - The method that dust waste water of converter is recycled with sulfate process titanium dioxide byproduct - Google Patents
The method that dust waste water of converter is recycled with sulfate process titanium dioxide byproduct Download PDFInfo
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- CN108609749A CN108609749A CN201810291475.9A CN201810291475A CN108609749A CN 108609749 A CN108609749 A CN 108609749A CN 201810291475 A CN201810291475 A CN 201810291475A CN 108609749 A CN108609749 A CN 108609749A
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- Prior art keywords
- waste water
- converter
- recycled
- titanium dioxide
- dust
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/02—Softening water by precipitation of the hardness
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention provides a kind of method being recycled to dust waste water of converter with sulfate process titanium dioxide byproduct.The method being recycled to dust waste water of converter with sulfate process titanium dioxide byproduct, at least includes the following steps：Ferrous sulfate solution is put into the waste water generated to converter dust-removing, through mixing, precipitating, obtains recyclable recycled water, and the recycled water is used for converter dust-removing；Wherein, the ferrous sulfate is the byproduct ferrous sulfate that sulfuric acid process produces that titanium dioxide obtains.On the one hand this method realizes the high-value-use to sulfate process titanium dioxide byproduct；On the other hand, reduce recycling waste water flocculated drug dispensing cost, save using soda ash as drop calcium agent the step of, to reduce converter dust-removing recycling waste water recycle cost；The third aspect, the ferro element in ferrous sulfate are transferred in flocculate precipitate, as iron-bearing material, can be used for smelting iron by sintering circuit, realize the utilization again of ferrous sulfate.
Description
Technical field
The invention belongs to dust waste water of converter utilization technology fields, and in particular to a kind of to use sulfate process titanium dioxide byproduct
The method that dust waste water of converter is recycled.
Background technology
Currently, the clarifying smoke of China's major part converter is based on wet dedusting.It is exactly specifically using " double Wen Cheng
The technological process of formula ", abbreviation OG wet dedusting techniques.The flow is：Converter gas is through overskirt, I to IV sections of gasification cooling flue
After cooling, 800 DEG C or so are down to by 1600 DEG C, then pass through one text, two text further cooling and dedustings, using guiding from
Heart wind turbine is to three-way switch valve, the entrance recovery system of coal gas qualification, and the flue gas that coal-gas recovering requirement is not achieved enters diffusing tower
Igniting discharge.Due in OG systems, needing to spray into a large amount of water to achieve the purpose that fully to capture dust, therefore will produce a large amount of
Contain Ca2+、Mg2+The dust waste water of plasma, these dust waste waters have the spies such as pH value height, suspension content height, hardness height
Point, direct emission can cause environmental pollution, typically recycled after treatment.The prior art is useless in processing dedusting
It is typically to add aluminium polychloride or bodied ferric sulfate as flocculant, polyacrylamide adds soda ash as flocculation aid when water
Make drop calcium agent, after precipitation, obtains the recycle-water that can be recycled.Current processing method, due to the medicine of addition
Agent is wide in variety, of high cost, and complex steps so that the cost of converter OG wet dedustings remains high always.
Invention content
For at present to converter dust-removing recycling waste water carry out recycling when existing pharmacy variety it is more, it is cumbersome simultaneously
And the problems such as with high costs, the present invention, which provides, a kind of with sulfate process titanium dioxide byproduct to be recycled dust waste water of converter
Method.
For achieving the above object, technical scheme is as follows：
A method of dust waste water of converter is recycled with sulfate process titanium dioxide byproduct, includes at least following step
Suddenly：
Ferrous sulfate solution is put into the waste water generated to converter dust-removing, through mixing, precipitate, obtains recyclable recycled water,
And the recycled water is re-used in converter dust-removing process；
Wherein, the ferrous sulfate in the ferrous sulfate solution is the sulfuric acid Asia that sulfuric acid process produces that titanium dioxide obtains
Iron.
The beneficial effects of the present invention are：Compared with the existing technology, the present invention is obtained with sulfuric acid process production titanium dioxide
By-product ferrous sulfate as flocculant and drop calcium agent, be directly thrown into converter dust-removing generation recycling waste water in, realize pair
The flocculation of recycling waste water, drop calcium effect, the recycled water obtained through processing, calcium carbonate hardness are less than 50mg/L, can use again
In converter dust-removing；On the one hand the high-value-use to titanium white sulfuric acid process byproduct is realized；On the other hand, cycle water flocculation medicine is reduced
The dispensing cost of object, also save using soda ash as drop calcium agent the step of, to reduce converter dust-removing recycling waste water recycling
Cost；The third aspect, the ferro element in ferrous sulfate, which is transferred in flocculating setting object, forms iron-bearing material, also by sintering processes
It can be used to smelt iron, realize iron resource comprehensive utilization.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not used to limit
The fixed present invention.
The present invention provides a kind of method being recycled to dust waste water of converter with sulfate process titanium dioxide byproduct, at least
Include the following steps：
Ferrous sulfate solution is put into the waste water generated to converter dust-removing, through mixing, precipitate, obtains recyclable recycled water,
And the recycled water is re-used in converter dust-removing process；
Wherein, the ferrous sulfate in the ferrous sulfate solution is the sulfuric acid Asia that sulfuric acid process produces that titanium dioxide obtains
Iron.
Technical scheme of the present invention is further explained in detail below.
The drug that the present invention carries out flocculating setting and deliming to the waste water that converter dust-removing generates is from sulfuric acid process
The ferrous sulfate that titanium dioxide obtains is produced, the possessed sulfuric acid obtained with conventional sulfuric acid ferrous iron production method of the ferrous sulfate is sub-
Iron has identical microscopic appearance, but as by-product, due to containing 5~15% impurity, cannot wherein be filled in reality
Divide and utilize, often directly abandon, but directly abandons and pollute the environment.Although ferrous sulfate can make as flocculant
With, but in most cases, because its flocculating effect is poor, to reach corresponding flocculating effect, need the amount put into very big, and need
Lime is added as flocculation aid, the sludge quantity of generation is also more, and therefore, nobody makes when handling converter dust-removing recycling waste water
With, but use aluminium polychloride and bodied ferric sulfate.In addition, using aluminium polychloride and bodied ferric sulfate as wadding at present
When solidifying agent processing converter dust-removing recycling waste water, need to put into the drop calcium agent such as soda ash, still, this hair into converter dust-removing recycling waste water
The bright ferrous sulfate directly obtained using sulfuric acid process production titanium dioxide, which then can be realized without addition drop calcium agent, removes converter
The removal of the calcium ion of dirt recycling waste water.By flocculating, in the sludge that precipitation obtains, ferrous sulfate is converted into the method for the present invention
Iron hydroxide, ferrous hydroxide and iron oxide, ferrous oxide can realize ferro element after sintering circuit for smelting iron
Recycling.Based on above-mentioned two aspect, the processing cost of the recycling waste water of converter dust-removing generation is not only reduced, is also achieved
The recycling of the by-product of sulfuric acid process titanium dioxide is recycled.
Preferably, in terms of the ferrous sulfate, the ferrous sulfate of 0.2kg~0.5kg is added in every cube of waste water.
Under the ingredient proportion, alumen ustum can be generated after mixing, by precipitation, you can obtain recycled water.
Preferably, the mass concentration of the ferrous sulfate aqueous solution is 5~20%.It is followed by ferrous sulfate aqueous solution input
When being acted in ring waste water, it can be added in the first dosing mixing facility before the sedimentation basin of recycling waste water processing, generally
It is to be added in coarse granules separation tank.
Preferably, the ferrous sulfate purity that sulfuric acid process production titanium dioxide obtains is FeSO4·7H2The mass content of O >=
85%, in favor of the comprehensive utilization of sulfate process titanium dioxide ferrous sulfate by-product.In order to obtain better flocculating setting effect and improvement
The dehydration of sludge and pressure mud effect, can be added in the second dosing mixing facility after ferrous sulfate is added it is suitable help it is solidifying
Agent.
Preferably, the flocculation aid is polyacrylamide solution.Using polyacrylamide solution as flocculation aid, on the one hand may be used
Effectively to improve sludge dewatering and pressure mud effect, but also flocculating setting can be accelerated, on the other hand, polyacrylamide will not be right
Subsequent technique has an impact.Preferably, the inventory of the polyacrylamide is that 0.5~1ppm is added into the waste water (to press
Solid gauge).
More effectively to illustrate technical scheme of the present invention, the technology of the present invention is illustrated below by multiple specific embodiments
Scheme.
Embodiment 1
A method of dust waste water of converter is recycled with sulfate process titanium dioxide byproduct, is included the following steps：
(1) sulfate process titanium dioxide by-product ferrous sulfate and the dust waste water of converter through processing recycling are configured to mass concentration
For 10% ferrous sulfate solution；
(2) waste water generated in converter dust-removing enters coarse granule sedimentation basin, using ferrous sulfate as calculating standard, by often standing
Fang Suoshu waste water puts into 10% ferrous sulfate solution of 3kg, flows out and generates alumen ustum after mixing by waterpower, then flow into
Inclined-plate clarifying basin precipitates, and obtains supernatant, namely regenerated water；
(3) recycled water that detecting step (2) obtains, after testing, hardness 47.2mg/L can be re-used for converter dust-removing
In.
Embodiment 2
A method of dust waste water of converter is recycled with sulfate process titanium dioxide byproduct, is included the following steps：
(1) mass concentration is made with industrial water in the by-product ferrous sulfate that sulfuric acid process production titanium dioxide obtains is
5% ferrous sulfate solution；
(2) waste water generated in converter dust-removing enters in coarse granule sedimentation basin, using ferrous sulfate as calculating standard, by every
5% ferrous sulfate solution of cube described waste water input 5kg, is flowed out by waterpower and is generated alumen ustum, flowing out after mixing
Sink in 0.5ppm ratios be added polyacrylamide solution mixing, so that alumen ustum is become larger and flow into inclined-plate clarifying basin precipitation, obtain
Obtain supernatant, namely regenerated water；
(3) filtrate that detecting step (2) obtains, after testing, hardness 40.6mg/L, since hardness is used less than converter dust-removing
Water, therefore can be re-used in converter dust-removing.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc. made by within refreshing and principle should all include within protection scope of the present invention.
Claims (7)
1. a kind of method being recycled to dust waste water of converter with sulfate process titanium dioxide byproduct, which is characterized in that at least
Include the following steps：
Ferrous sulfate solution is put into the waste water generated to converter dust-removing, through mixing, precipitating, obtains recyclable recycled water, and will
The recycled water is re-used in converter dust-removing process；
Wherein, the ferrous sulfate in the ferrous sulfate solution is the ferrous sulfate that sulfuric acid process produces that titanium dioxide obtains.
2. the method that dust waste water of converter is recycled with sulfate process titanium dioxide byproduct as described in claim 1,
It is characterized in that, in terms of the ferrous sulfate, 0.2~0.5kg is added in every cube of waste water.
3. as claim 1~2 any one of them is recycled dust waste water of converter with sulfate process titanium dioxide byproduct
Method, which is characterized in that the mass concentration of the ferrous sulfate solution be 5~20%.
4. as claim 1~2 any one of them is recycled dust waste water of converter with sulfate process titanium dioxide byproduct
Method, which is characterized in that further include that flocculation aid is added into the waste water.
5. the method that dust waste water of converter is recycled with sulfate process titanium dioxide byproduct as claimed in claim 4,
It is characterized in that, the flocculation aid is polyacrylamide solution.
6. the method that dust waste water of converter is recycled with sulfate process titanium dioxide byproduct as claimed in claim 5,
It is characterized in that, in terms of the polyacrylamide quality, the polyacrylamide being added into the waste water is 0.5~1ppm.
7. as claim 1~2 any one of them is recycled dust waste water of converter with sulfate process titanium dioxide byproduct
Method, which is characterized in that the purity of the ferrous sulfate be FeSO4·7H2Mass content >=85% of O.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810291475.9A CN108609749A (en) | 2018-04-03 | 2018-04-03 | The method that dust waste water of converter is recycled with sulfate process titanium dioxide byproduct |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810291475.9A CN108609749A (en) | 2018-04-03 | 2018-04-03 | The method that dust waste water of converter is recycled with sulfate process titanium dioxide byproduct |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101417841A (en) * | 2008-11-21 | 2009-04-29 | 韶关市雅鲁环保实业有限公司 | Process for treating revolving furnace flue gas dedusting water from steel mill by low hardness method |
| CN202410470U (en) * | 2012-02-17 | 2012-09-05 | 新兴铸管股份有限公司 | Secondary dust removal system shared by stainless steel smelting and plain steel smelting |
-
2018
- 2018-04-03 CN CN201810291475.9A patent/CN108609749A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101417841A (en) * | 2008-11-21 | 2009-04-29 | 韶关市雅鲁环保实业有限公司 | Process for treating revolving furnace flue gas dedusting water from steel mill by low hardness method |
| CN202410470U (en) * | 2012-02-17 | 2012-09-05 | 新兴铸管股份有限公司 | Secondary dust removal system shared by stainless steel smelting and plain steel smelting |
Non-Patent Citations (2)
| Title |
|---|
| 王笏曹 等: "《钢铁工业给水排水设计手册》", 31 January 2002, 冶金工业出版社 * |
| 赵由才 等: "《有色冶金过程污染控制与资源化》", 31 December 2012, 中南大学出版社 * |
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Application publication date: 20181002 |