CN106698985A - Method for treating waste acid from titanium white production based on sulfuric acid method with red mud - Google Patents
Method for treating waste acid from titanium white production based on sulfuric acid method with red mud Download PDFInfo
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- CN106698985A CN106698985A CN201611143565.0A CN201611143565A CN106698985A CN 106698985 A CN106698985 A CN 106698985A CN 201611143565 A CN201611143565 A CN 201611143565A CN 106698985 A CN106698985 A CN 106698985A
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- China
- Prior art keywords
- red mud
- waste acid
- sulfuric acid
- acid
- titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/32—Aluminous cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to the fields of comprehensive utilization of resources and environmental governance, and particularly relates to a method for treating waste acid from titanium white production based on a sulfuric acid method with red mud. The method comprises the following steps: (1) slurrying and decomposing red mud; (2) performing causticizing reaction on waste acid from titanium white production and the red mud slurry; and (3) performing after-treatment on the reaction slurry. The method is easy to implement and low in production cost. Particularly, the waste acid from titanium white production is treated with the waste red mud to achieve the purpose of using waste to treat waste, and the obtained high silicon/aluminum/titanium gypsum can be used for cement manufacturing. Thus, the method realizes comprehensive utilization, reduces risks of discharge and stacking, conforms to sustainable ecological development and achieves remarkable economic/social benefits.
Description
Technical field
The present invention relates to comprehensive utilization of resources and field of environmental improvement, and in particular to one kind processes sulfuric acid process titanium using red mud
The method of white spent acid.
Background technology
Sulfuric acid method titanium pigment production technology is one of method of titanium white production, and the production Technology is ripe, technique stream
Journey is long, and the three wastes discharge amount of generation is big.Wherein main waste liquid is spent acid and acid waste water, and the content about 20% of spent acid is (with sulphur
Acid metering) left and right, about 6-8 tons or so of the yield of spent acid；The content of acid waste water about 2-5% (being measured with sulfuric acid) left and right, acid
About 50-60 tons or so of the yield of property waste water.At present, it is substantially to be neutralized using lime to administer sulfuric acid process spent acid and acid waste water
Method, or the alkaline matter such as calcium carbonate, carbide slurry carries out neutralisation treatment, no matter using which kind of mode or raw material, will produce
Substantial amounts of calcium sulfate, is measured with titanium dioxide per ton, often produces the calcium sulfate (industry that 1 ton of titanium dioxide about produces 5-8 tons or so
It is interior to be referred to as titanium gypsum).Substantial amounts of solid waste is caused to store up, it is serious to have impact on environment and occupy limited soil, no
Meet national environmental protection policy and continuable ecodevelopment.
Red mud is that aluminium industry extracts the contaminative waste residue discharged during aluminum oxide, and average often produces 1 ton of aluminum oxide, attached
Band produces 1.0~2.0 tons of red muds.China is up to millions of tons as alumina producing big country of the world, the red mud of annual discharge, greatly
The red mud of amount sufficiently effective can not be utilized, and the stockyard of large area can only be relied on to stack, and occupy a large amount of soils, and also environment is made
Into serious pollution.
The content of the invention
Part and defect, sulfuric acid is processed it is an object of the invention to provide one kind using red mud in view of the shortcomings of the prior art
The characteristics of method of method titanium white waste acid, this two kinds of wastes of processing method comprehensive utilization, realize with Abfallwirtschaft waste, and subtract
The stacking place of few discarded object, realizes the characteristics of waste becomes resource and is comprehensively utilized, to realize the maximization of benefit
With the purpose of emission reduction.
A kind of method that utilization red mud processes titanium dioxide waste acid by sulfuric acid process, comprises the following steps：
(1) pulp of red mud is decomposed；
(2) causticizing reaction of titanium white waste acid and red mud slurries；
(3) post processing of reaction paste.
Red mud includes each component with following mass fractions：20--23%SiO2, 46--50%CaO, 6--8%Al2O3、
3--10%Na2O, 6--8%H2O.Titanium white waste acid is mainly sulfuric acid (being measured with sulfuric acid) and 7-10% containing content about 20%
Ferrous sulfate.It can thus be seen that the main component of red mud can react with titanium dioxide waste acid by sulfuric acid process, so as to reach profit
The purpose of titanium dioxide waste acid by sulfuric acid process is administered with red mud.
Because of the brown bulk of alkaline red mud, it is not easy to be flooded and bubble open, so using preceding needing pulp to decompose, i.e., it is described
Red mud is carried out into mashing grinding with the neutral water after treatment spent acid in step (1), is stirred using many oar blade types, pulp is decomposed and finished
Afterwards, into the slurry storage tank with agitating device.
Slurry concentration is 300-450g/L in the step (1), and the speed control of many oar blade type stirrings turns/min in 5-15,
Mixing time is 30-50min, and slurry storage tank mixing speed is that 10-15 turns/min.
In the step (2) by the slurry in red mud slurry storage tank it is uniform according to titanium white waste acid 1:3 ratio is added
To in retort, red mud slurries are made to be reacted with titanium white waste acid.
Mixing speed control turns/min in 15-30 in step (2) retort, and mixing time is 10-15min.
The reaction mass carbide slurry or quick lime of previous operation are further neutralized in the step (3), Ran Houjin
Row plate compression, the filter cake after press filtration carries out natural drying so that after cake moisture is less than 10%, send cement plant clinker car
Between, because this titanium gypsum contains ferro-silico aluminium, compounded by clinker, sial cement high can be obtained.
Carbide slurry or quick lime 10-20g are added in every 100mL waste water in the step (3), makes the pH of reaction mass equal
7-8 can be reached.
Recycled in filtrate portion return to step (1) in the step (3) after press filtration, residual filtrate is returned into reclaimed water
Use workshop.
The beneficial effects of the present invention are：
Methods described is easy to implement, low production cost, and another titanium white is administered especially with a kind of waste red mud
Spent acid, realizes the purpose of waste recycling, and the sial titanium gypsum high for enabling to is manufactured for cement, realizes synthesis
Utilize, reduce discharge and the risk stored up, meet continuable ecology development concept and significant economic and social benefits.
Brief description of the drawings
Fig. 1 is process chart of the present invention.
Specific embodiment
Embodiment 1
The red mud of 300g is carried out into mashing grinding, the speed control of many oar blade type stirrings with the neutral water 1L after treatment spent acid
In 5 turns/min, after stirring 30min, pulp is decomposed and finished, and slurry enters slurry storage tank, and slurry storage tank mixing speed is 10 turns/
min.By the slurry in red mud slurry storage tank it is uniform according to titanium white waste acid 1:3 ratio is added to titanium white waste acid retort
In, mixing speed control stirs 10min in 15 turns/min, after red mud slurries is carried out fully reaction with titanium white waste acid, uses calcium carbide
Mud is further neutralized, and carbide slurry 10g is added according to every 100mL waste water, and the pH of reaction mass is 7.3, then carries out sheet frame pressure
Filter, the filter cake after press filtration carries out natural drying so that after cake moisture is less than 10%, send cement plant clinker workshop to carry out clinker
Compounding, can obtain sial cement high.
Embodiment 2
The red mud of 400g is carried out into mashing grinding, the speed control of many oar blade type stirrings with the neutral water 1L after treatment spent acid
In 10 turns/min, after stirring 40min, pulp is decomposed and finished, and slurry enters slurry storage tank, and slurry storage tank mixing speed is 15 turns/
min.By the slurry in red mud slurry storage tank it is uniform according to titanium white waste acid 1:3 ratio is added to titanium white waste acid retort
In, mixing speed control stirs 15min in 20 turns/min, after red mud slurries is carried out fully reaction with titanium white waste acid, uses calcium carbide
Mud is further neutralized, and carbide slurry 20g is added according to every 100mL waste water, and the pH of reaction mass is 7.8, then carries out sheet frame pressure
Filter, the filter cake after press filtration carries out natural drying so that after cake moisture is less than 10%, send cement plant clinker workshop to carry out clinker
Compounding, can obtain sial cement high.
Embodiment 3
The red mud of 450g is carried out into mashing grinding, the speed control of many oar blade type stirrings with the neutral water 1L after treatment spent acid
In 15 turns/min, after stirring 50min, pulp is decomposed and finished, and slurry enters slurry storage tank, and slurry storage tank mixing speed is 15 turns/
min.By the slurry in red mud slurry storage tank it is uniform according to titanium white waste acid 1:3 ratio is added to titanium white waste acid retort
In, mixing speed control stirs 15min in 30 turns/min, after red mud slurries is carried out fully reaction with titanium white waste acid, with raw stone
Grey further neutralization, quick lime 10g is added according to every 100mL waste water, and the pH of reaction mass is 7.6, then carries out sheet frame pressure
Filter, the filter cake after press filtration carries out natural drying so that after cake moisture is less than 10%, send cement plant clinker workshop to carry out clinker
Compounding, can obtain sial cement high.
Embodiment 4
The red mud of 400g is carried out into mashing grinding, the speed control of many oar blade type stirrings with the neutral water 1L after treatment spent acid
In 10 turns/min, after stirring 40min, pulp is decomposed and finished, and slurry enters slurry storage tank, and slurry storage tank mixing speed is 10 turns/
min.By the slurry in red mud slurry storage tank it is uniform according to titanium white waste acid 1:3 ratio is added to titanium white waste acid retort
In, mixing speed control stirs 10min in 20 turns/min, after red mud slurries is carried out fully reaction with titanium white waste acid, with raw stone
Grey further neutralization, quick lime 20g is added according to every 100mL waste water, and the pH of reaction mass is 8.0, then carries out sheet frame pressure
Filter, the filter cake after press filtration carries out natural drying so that after cake moisture is less than 10%, send cement plant clinker workshop to carry out clinker
Compounding, can obtain sial cement high.
Claims (9)
1. a kind of method that utilization red mud processes titanium dioxide waste acid by sulfuric acid process, it is characterised in that comprise the following steps：
(1) pulp of red mud is decomposed；
(2) causticizing reaction of titanium white waste acid and red mud slurries；
(3) post processing of reaction paste.
2. the method that a kind of utilization red mud according to claim 1 processes titanium dioxide waste acid by sulfuric acid process, it is characterised in that red mud
Including each component with following mass fractions：20--23%SiO2, 46--50%CaO, 6--8%Al2O3, 3--10%Na2O、
6--8%H2O。
3. the method that a kind of utilization red mud according to claim 1 processes titanium dioxide waste acid by sulfuric acid process, it is characterised in that described
Red mud is carried out into mashing grinding with the neutral water after treatment spent acid in step (1), is stirred using many oar blade types, pulp is decomposed and finished
Afterwards, into the slurry storage tank with agitating device.
4. the method that a kind of utilization red mud according to claim 3 processes titanium dioxide waste acid by sulfuric acid process, it is characterised in that described
Slurry concentration is 300-450g/L in step (1), and the speed control of many oar blade type stirrings turns/min in 5-15, and mixing time is
30-50min, slurry storage tank mixing speed is that 10-15 turns/min.
5. the method that a kind of utilization red mud according to claim 3 or 4 processes titanium dioxide waste acid by sulfuric acid process, it is characterised in that
In the step (2) by the slurry in red mud slurry storage tank it is uniform according to titanium white waste acid 1:3 ratio is added to retort
In, red mud slurries is reacted with titanium white waste acid.
6. the method that a kind of utilization red mud according to claim 5 processes titanium dioxide waste acid by sulfuric acid process, it is characterised in that described
Mixing speed control turns/min in 15-30 in step (2) retort, and mixing time is 10-15min.
7. the method that a kind of utilization red mud according to claim 1 processes titanium dioxide waste acid by sulfuric acid process, it is characterised in that described
The reaction mass carbide slurry or quick lime of previous operation are further neutralized in step (3), then carries out plate compression, pressed
Filter cake after filter carries out natural drying so that after cake moisture is less than 10%, send cement plant clinker workshop to carry out clinker compounding
Obtain sial cement high.
8. the method that a kind of utilization red mud according to claim 7 processes titanium dioxide waste acid by sulfuric acid process, it is characterised in that described
Carbide slurry or quick lime 10-20g are added in every 100mL waste water in step (3), making the pH of reaction mass can reach 7-8.
9. the method that a kind of utilization red mud according to claim 7 or 8 processes titanium dioxide waste acid by sulfuric acid process, it is characterised in that
Recycled in filtrate portion return to step (1) in the step (3) after press filtration, residual filtrate enters Treated sewage reusing workshop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611143565.0A CN106698985A (en) | 2016-12-13 | 2016-12-13 | Method for treating waste acid from titanium white production based on sulfuric acid method with red mud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611143565.0A CN106698985A (en) | 2016-12-13 | 2016-12-13 | Method for treating waste acid from titanium white production based on sulfuric acid method with red mud |
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| CN106698985A true CN106698985A (en) | 2017-05-24 |
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| CN201611143565.0A Pending CN106698985A (en) | 2016-12-13 | 2016-12-13 | Method for treating waste acid from titanium white production based on sulfuric acid method with red mud |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114368789A (en) * | 2021-12-16 | 2022-04-19 | 北部湾大学 | Method for preparing ferrous sulfate crystal from red mud and titanium white waste acid |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1837121A (en) * | 2006-04-20 | 2006-09-27 | 中国地质大学（北京） | Method for preparing sulphate aluminium cement by red mud |
| CN104120267A (en) * | 2014-08-01 | 2014-10-29 | 广西百合化工股份有限公司 | Method for extracting high-purity scandium oxide from titanium dioxide waste acid and Bayer-process red mud by virtue of high-temperature acid leaching |
-
2016
- 2016-12-13 CN CN201611143565.0A patent/CN106698985A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1837121A (en) * | 2006-04-20 | 2006-09-27 | 中国地质大学（北京） | Method for preparing sulphate aluminium cement by red mud |
| CN104120267A (en) * | 2014-08-01 | 2014-10-29 | 广西百合化工股份有限公司 | Method for extracting high-purity scandium oxide from titanium dioxide waste acid and Bayer-process red mud by virtue of high-temperature acid leaching |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114368789A (en) * | 2021-12-16 | 2022-04-19 | 北部湾大学 | Method for preparing ferrous sulfate crystal from red mud and titanium white waste acid |
| CN114368789B (en) * | 2021-12-16 | 2022-07-05 | 北部湾大学 | Method for preparing ferrous sulfate crystal from red mud and titanium white waste acid |
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Application publication date: 20170524 |