CN107841621A - A kind of method that high-grad iron ore deposit is produced using pickling iron cement - Google Patents
A kind of method that high-grad iron ore deposit is produced using pickling iron cement Download PDFInfo
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- CN107841621A CN107841621A CN201610832883.1A CN201610832883A CN107841621A CN 107841621 A CN107841621 A CN 107841621A CN 201610832883 A CN201610832883 A CN 201610832883A CN 107841621 A CN107841621 A CN 107841621A
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- Prior art keywords
- iron
- pickling
- ore deposit
- grad
- cement
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/248—Binding; Briquetting ; Granulating of metal scrap or alloys
Abstract
The invention belongs to solid waste to utilize technical field, and in particular to a kind of method that high-grad iron ore deposit is produced using pickling iron cement.After being well mixed, pelletizing is pressed into pelletizer, moisture is removed into dryer, is calcined subsequently into high temperature furnace, that is, obtains high-grad iron ore deposit in 20~60wt%, the binding agent that addition mass fraction is 0~10% for the moisture control in pickling iron cement first.The present invention produces the high-grad iron ore deposit of high-quality using the pickling iron cement usually as solid waste, realizes the comprehensive utilization of resource.
Description
Technical field
The invention belongs to solid waste to utilize field, and in particular to a kind of method that high-grad iron ore deposit is produced using pickling iron cement.
Background technology
Steel product usually requires to be cleaned with strong acid in process, to remove the oxide skin of workpiece surface.When
After iron ion in acid solution reaches finite concentration, its burn into cleaning performance can be caused to be remarkably decreased and turn into spent acid.Acid-washing waste acid
The iron ion higher with concentration is usually contained in flushing waste water and inorganic acid are (such as：Hydrochloric acid, sulfuric acid, nitric acid, hydrofluoric acid, nitration mixture
Deng), there is very strong acidity and corrosivity, be put into《National Hazard waste register》.Ferrous waste acid and flushing waste water be not if
Add processing directly discharge, not only cause the wasting of resources, can also produce serious harm to environment.
According to statistics, the yield of the annual acid-washing waste acid of China's steel industry and flushing waste water is more than 100,000,000 tons.Pickling is given up
The main methods of acid and flushing waste water have one-step calcinations, evaporative crystallization method and alkali neutralisation.What one-step calcinations obtained
Iron oxide product grade is higher, but equipment costliness, high energy consumption, operating cost are high, seldom application；Evaporative crystallization method equipment requirement
Height, investment is big, operating cost is high, and the molysite product reclaimed is overlapping with the byproduct of titanium dioxide industry, causes serious surplus, city
Field is worth very low, less use at present.Alkali neutralisation technique is simple, small investment, medicament expense with low, be that the most frequently used pickling is given up
Acid and flushing waste water processing method, its main deficiency are caused a large amount of iron content solids, the i.e. useless mud of pickling, at present can only conduct
Solid waste is disposed, costly.
From composition, the useless mud of steel industry pickling is mainly made up of iron oxide, moisture and a small amount of impurity, composition letter
It is monostable fixed, there is higher value.Seek reasonable effective method, recycling is carried out to pickling iron cement, to forming
Steel industry new growth engines has important impetus, also has weight to national resources saving and the strategy of sustainable development
Want meaning.
Steel industry is the mainstay of China or even world industry, and according to statistics, China's steel yield in 2015 has exceeded
1100000000 tons.As the basis of steel industry, the exploitation of iron ore and usage amount are also very huge, and global iron ore year yield exists
More than 2000000000 tons.High-grad iron ore deposit of the iron content more than 50% is mainly distributed on Brazil, Russia and Australia, the iron ore in China
With content based on 33% or so the poor iron ore, high-grad iron ore deposit largely relies on import.Due to a large amount of exploitations of high-grad iron ore deposit, its reserves is just
Increasingly reducing, mining company is directing attention to low-grade poor iron ore.However, the exploitation of poor iron ore, which utilizes, has skill
The problems such as art difficulty is big, cost is high, and solid waste amount caused by the steel of production equivalent greatly increases.
Therefore, artificial high-grad iron ore deposit is produced using the high pickling iron cement of composition simple and stable, iron content, can not only alleviated significantly
The solidification disposal of waste pressure of steel industry, production cost is reduced, and natural high-grad iron ore deposit resource can be saved.
The content of the invention
It is an object of the invention to provide a kind of method that high-grad iron ore deposit is produced using pickling iron cement, using iron content solid waste as raw material
High-grade high-grad iron ore deposit is produced, it is reused for steel production, the purpose for realize twice laid, economizing on resources.
The technical scheme is that：
A kind of method that high-grad iron ore deposit is produced using pickling iron cement, using produced by ferrous waste acid or iron content waste water neutralisation treatment
Pickling iron cement be primary raw material, high-grad iron ore deposit is produced by high-temperature roasting.
The described method that high-grad iron ore deposit is produced using pickling iron cement, pickling iron cement is from the metallic article based on steel
Industry, its main component is iron oxide and water, simultaneously containing at least one inorganic salts, and hydroxide；By weight hundred
Point than meter, iron oxide content is 20~70%, and water content is 20~80%, and inorganic salt content is no more than 15%, hydroxide
Thing content is no more than 10%.
The described method that high-grad iron ore deposit is produced using pickling iron cement, iron oxide are the oxide of iron or the hydroxide of iron
Thing, water are free water or the crystallization water, and inorganic salts are sodium chloride, calcium chloride, magnesium chloride, sodium sulphate or calcium sulfate, and hydroxide is
The hydroxide of aluminium, magnesium or zinc.
The described method that high-grad iron ore deposit is produced using pickling iron cement, binding agent is added in pickling iron cement, using clay, recessed
At least one of convex rod powder, bentonite, semi-hydrated gypsum are binding agent, and the mass fraction of binding agent is controlled 0~10%.
The described method that high-grad iron ore deposit is produced using pickling iron cement, the concrete technology step and technological parameter of this method are such as
Under：
(1) the pickling iron cement after separation of solid and liquid is subjected to homogeneity of water, total moisture content is controlled in 20~60wt%；
(2) pickling iron cement and binding agent are uniformly mixed using mixing apparatus, the control of the mass fraction of binding agent 0~
10%；
(3) homogeneous mixture of pickling iron cement and binding agent is pressed into a diameter of 20~80mm ball using pelletizer
Group, and enter drying plant and carry out dewater treatment, dehydration temperaturre is 120~300 DEG C, and dewatering time is 15~120min, with water
Point content is advisable not higher than 5wt%；
(4) high temperature furnace will be sent into by the pelletizing dried and be dehydrated, 30~180min is calcined at 600~900 DEG C, is obtained
Described high-grad iron ore deposit.
The described method that high-grad iron ore deposit is produced using pickling iron cement, the iron content in high-grad iron ore deposit are not less than 50wt%.
The design principle of the present invention is as follows：
The present invention condensation reaction of surface hydroxyl and binding agent when utilizing ferrous hydroxide or iron hydroxide drying and dewatering
Cementation, pelletizing is made by pickling iron cement, is then sintered at high temperature and homogenization of composition, is obtained with some strength
High-grad iron ore deposit pelletizing.
Advantages of the present invention and have the beneficial effect that：
1st, the present invention can directly utilize pickling iron cement caused by steel product industry, it is avoided as at solid waste
Reason, can not only save solidification disposal of waste expense, and saved the high-grad iron ore deposit resource of increasingly reduction.
2nd, the main component for the pickling iron cement that the present invention utilizes is the oxide and hydroxide of iron, usually neutral or weak
Alkalescence, and sour gas is nearly free from roasting process, equipment corrosion is low, and environmental pollution is small.
3rd, the high-grad iron ore deposit prepared using the present invention, iron content may be up to more than 70wt%, and use value is high.
Embodiment
In specific implementation process, the present invention is produced using steel product industry acid-washing waste acid and flushing waste water neutralisation treatment
Iron content give up mud be primary raw material, high-grade high-grad iron ore deposit is prepared by techniques such as pelletizing, dehydration, roastings, detailed process is such as
Under：The moisture first obtained neutralization ferrous waste acid or iron content waste water in iron cement is controlled in 20~60wt%, adds quality
Fraction is the binding agent of 0~10% (being preferably 1.0~5.0%), after being well mixed, pelletizing is pressed into pelletizer, into drying
Machine removes moisture, is calcined subsequently into high temperature furnace, that is, obtains high-grad iron ore deposit, obtained high-grad iron ore deposit iron content is not less than 50wt%
(being preferably 65~72wt%), value is high.The present invention produces high-quality using the pickling iron cement usually as solid waste
High-grad iron ore deposit, in pickling iron cement containing abundant iron oxide (such as：FeO、Fe2O3、Fe3O4、Fe(OH)2、Fe(OH)3One of Deng
Kind is two or more), realize the comprehensive utilization of resource.
The present invention is described in further detail with reference to embodiment.
Embodiment 1
Iron ion content is 65g/L in certain accurate wire works' pickling waste hydrochloric acid, and iron ion content is 4.5g/L in flushing water,
After carrying out neutralisation treatment with liquid caustic soda, separation of solid and liquid is carried out by diaphragm filter press, obtains water content as 61wt%, iron oxide
The iron cement that content is 38wt%, sodium chloride content is 1wt%.
0.2kg bentonites are added into the above-mentioned iron cements of 9.8kg as binding agent, chi is pressed into experiment pelletizer after homogenization
Very little a diameter of 30mm pelletizing；Pelletizing is sent into drying box and is dehydrated 90min in 180 DEG C, moisture content is reduced within 5wt%；It is dry
Pelletizing after dry is entered in high temperature furnace, is calcined 60min in 700 DEG C, is obtained high-grad iron ore deposit.Constituent analysis shows, the high-grad iron ore deposit
Iron content is up to 71.5wt%.
Embodiment 2
Iron ion content is 173g/L in certain precision tube factory pickling Waste Sulfuric Acid, and iron ion content is 4.9g/ in flushing water
L, after carrying out neutralisation treatment with liquid caustic soda, separation of solid and liquid is carried out by diaphragm filter press, obtain water content and aoxidized for 56.3wt%, iron
The iron cement that compound content is 42wt%, sodium sulphate content is 1.7wt%.
0.5kg attapulgites are added into the above-mentioned iron cements of 9.5kg as binding agent, are pressed into after homogenization with experiment pelletizer
Size diameter is 30mm pelletizing；Pelletizing is sent into drying box and is dehydrated 120min in 160 DEG C, moisture content is reduced within 5wt%；
Dried pelletizing is entered in high temperature furnace, is calcined 60min in 750 DEG C, is obtained high-grad iron ore deposit.Constituent analysis shows, the high-grad iron ore deposit
Iron content be 65.8wt%.
Embodiment 3
Iron ion content is 195g/L in certain Gang Mao factories pickling waste hydrochloric acid, and iron ion content is 8.1g/L in flushing water, is used
After lime carries out neutralisation treatment, separation of solid and liquid is carried out by diaphragm filter press, obtains water content as 57.4wt%, iron oxide
The iron cement that content is 39wt%, calcium chloride and other impurity contents are 3.6wt%.
It is 45mm that the above-mentioned iron cements of 10kg are pressed into size diameter with experiment pelletizer, and thickness is 15mm flat pelletizing；Will
Pelletizing is sent into drying box and is dehydrated 90min in 180 DEG C, and moisture content is reduced within 5wt%；Dried pelletizing enters high temperature furnace
In, 90min is calcined in 800 DEG C, obtains high-grad iron ore deposit.Constituent analysis shows that the iron content of the high-grad iron ore deposit is 55.1wt%.
Embodiment 4
Iron ion content is 35.6g/L in certain Hardware Tools Factory's pickling waste hydrochloric acid, after carrying out neutralisation treatment with liquid caustic soda, is passed through
Filter press carries out separation of solid and liquid, obtains that water content is 67.4wt%, iron oxide content is 30.5wt%, sodium chloride content is
2.1wt% iron cement.
0.4kg clays are added into the above-mentioned iron cements of 9.6kg as binding agent, size is pressed into experiment pelletizer after homogenization
A diameter of 30mm pelletizing；Pelletizing is sent into drying box and is dehydrated 90min in 180 DEG C, moisture content is reduced within 5wt%；Dry
Pelletizing afterwards is entered in high temperature furnace, is calcined 90min in 800 DEG C, is obtained high-grad iron ore deposit.Constituent analysis shows, the iron of the high-grad iron ore deposit
Content is 67.1wt%.
Embodiment result shows that the present invention is using caused by steel product industry acid-washing waste acid and flushing waste water neutralisation treatment
The useless mud of iron content is primary raw material, is aided with a small amount of binding agent, by techniques such as pelletizing, dehydration, roastings, high-grade richness can be made
Iron ore.By high-grad iron ore deposit produced by the present invention, its iron content can exceed 70wt% in more than 50wt%, highest, have profit well
With value.
Claims (6)
- A kind of 1. method that high-grad iron ore deposit is produced using pickling iron cement, it is characterised in that neutralized using ferrous waste acid or iron content waste water Pickling iron cement caused by processing is primary raw material, and high-grad iron ore deposit is produced by high-temperature roasting.
- 2. according to the method that high-grad iron ore deposit is produced using pickling iron cement described in claim 1, it is characterised in that pickling iron cement source In the Steel Wire Products Industry based on steel, its main component is iron oxide and water, simultaneously containing at least one inorganic salts, And hydroxide；By weight percentage, iron oxide content is 20~70%, and water content is 20~80%, inorganic salts Content is no more than 15%, and hydroxide content is no more than 10%.
- 3. according to the method for producing high-grad iron ore deposit described in claim 2 using pickling iron cement, it is characterised in that iron oxide is The oxide of iron or the hydroxide of iron, water are free water or the crystallization water, and inorganic salts are sodium chloride, calcium chloride, magnesium chloride, sulfuric acid Sodium or calcium sulfate, hydroxide are the hydroxide of aluminium, magnesium or zinc.
- 4. according to the method that high-grad iron ore deposit is produced using pickling iron cement described in claim 1, it is characterised in that in pickling iron cement Binding agent is added, uses at least one of clay, attapulgite, bentonite, semi-hydrated gypsum as binding agent, the quality of binding agent Fractional domination is 0~10%.
- 5. according to the method that high-grad iron ore deposit is produced using pickling iron cement described in one of Claims 1 to 4, it is characterised in that the party The concrete technology step and technological parameter of method are as follows：(1) the pickling iron cement after separation of solid and liquid is subjected to homogeneity of water, total moisture content is controlled in 20~60wt%；(2) pickling iron cement and binding agent are uniformly mixed using mixing apparatus, the mass fraction of binding agent is controlled 0~10%；(3) homogeneous mixture of pickling iron cement and binding agent is pressed into a diameter of 20~80mm pelletizing using pelletizer, and Dewater treatment is carried out into drying plant, dehydration temperaturre is 120~300 DEG C, and dewatering time is 15~120min, with moisture It is advisable not higher than 5wt%；(4) high temperature furnace will be sent into by the pelletizing dried and be dehydrated, 30~180min is calcined at 600~900 DEG C, is obtained described High-grad iron ore deposit.
- 6. according to the method that high-grad iron ore deposit is produced using pickling iron cement described in claim 5, it is characterised in that the iron in high-grad iron ore deposit Content is not less than 50wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610832883.1A CN107841621A (en) | 2016-09-20 | 2016-09-20 | A kind of method that high-grad iron ore deposit is produced using pickling iron cement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610832883.1A CN107841621A (en) | 2016-09-20 | 2016-09-20 | A kind of method that high-grad iron ore deposit is produced using pickling iron cement |
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| CN107841621A true CN107841621A (en) | 2018-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610832883.1A Pending CN107841621A (en) | 2016-09-20 | 2016-09-20 | A kind of method that high-grad iron ore deposit is produced using pickling iron cement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112813258A (en) * | 2020-12-30 | 2021-05-18 | 铜陵有色金属集团股份有限公司 | Method for producing alkaline pellets by utilizing neutralized slag and sulfuric acid slag |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87103373A (en) * | 1987-05-06 | 1988-11-23 | 黄卓林 | Reclaim the method for iron oxide red and sulphur ammonium in the spent pickle liquor |
| CN102051475A (en) * | 2009-11-04 | 2011-05-11 | 饶文涛 | Method for recycling acid-washed iron-containing sludge |
| CN103937972A (en) * | 2014-05-07 | 2014-07-23 | 苏州皇森机电科技有限公司 | Method for preparing secondary iron alloy from acid washing sludge of sewage treatment plant |
| CN105734297A (en) * | 2016-04-22 | 2016-07-06 | 四川大学 | Method for reduction and detoxification of stainless steel acid pickling sludge |
-
2016
- 2016-09-20 CN CN201610832883.1A patent/CN107841621A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87103373A (en) * | 1987-05-06 | 1988-11-23 | 黄卓林 | Reclaim the method for iron oxide red and sulphur ammonium in the spent pickle liquor |
| CN102051475A (en) * | 2009-11-04 | 2011-05-11 | 饶文涛 | Method for recycling acid-washed iron-containing sludge |
| CN103937972A (en) * | 2014-05-07 | 2014-07-23 | 苏州皇森机电科技有限公司 | Method for preparing secondary iron alloy from acid washing sludge of sewage treatment plant |
| CN105734297A (en) * | 2016-04-22 | 2016-07-06 | 四川大学 | Method for reduction and detoxification of stainless steel acid pickling sludge |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112813258A (en) * | 2020-12-30 | 2021-05-18 | 铜陵有色金属集团股份有限公司 | Method for producing alkaline pellets by utilizing neutralized slag and sulfuric acid slag |
| CN112813258B (en) * | 2020-12-30 | 2022-09-02 | 铜陵有色金属集团股份有限公司 | Method for producing alkaline pellets by utilizing neutralized slag and sulfuric acid slag |
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Application publication date: 20180327 |