CN1235689C - Method for comprehensive utilization of sulfur iron ore - Google Patents
Method for comprehensive utilization of sulfur iron ore Download PDFInfo
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- CN1235689C CN1235689C CN 03146934 CN03146934A CN1235689C CN 1235689 C CN1235689 C CN 1235689C CN 03146934 CN03146934 CN 03146934 CN 03146934 A CN03146934 A CN 03146934A CN 1235689 C CN1235689 C CN 1235689C
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- Prior art keywords
- slag
- sulfuric acid
- high ferro
- reaction
- sulphuric acid
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The present invention discloses a method for comprehensively utilizing pyrites, which belongs to the field of chemical industries and comprises a step for producing sulphuric acid by the pyrites and a step for producing liquid aluminum sulfate by the reaction of the sulfuric acid and alumyte in the prior art, wherein sulphuric acid cinder is matched with a certain amount of liquid aluminum sulfate after magnetic separation and pulverization so as to be in reaction with the sulphuric acid in a reaction kettle; after filter liquid is filtered and pressed, Fe<+2> is oxidized into Fe<+3> by an oxidation agent so as to obtain a polymerized aluminium ferrite sulfate product as a water purifying agent; or the powdery polymerized aluminium ferrite sulfate product is obtained by vacuum concentration and spray drying. The present invention provides the reasonable and feasible technological method which synchronously emphasizes production and environment protection, and effectively increases the economic benefit of the existing sulphuric acid plants according to the actual conditions of various pyrites.
Description
Technical field
The present invention relates to a kind of burning slag that utilizes after troilite is produced sulfuric acid, the technology of the polyaluminium sulfate silicic acid that productive value is higher belongs to troilite deep process technology field.
Background technology
At present, utilize troilite to produce the factory of sulfuric acid, the burning slag (waste residue) that produces in its production process contains 30～40% iron, and is on the low side and contain 1～3% the sulphur of having an appointment because of iron content, thereby is not suitable for direct smelting; There is report utilize to burn slag and produces products such as iron oxide red, but can't apply because of the shade deviation of product.At present, the burning slag of most sulfuric acid plants is all sold with extremely low price and is given the cement plant and make inserts.
Chinese patent CN1337356A discloses a kind of " production technology of aluminium iron sulfate polymer as composite water purifying agent ", utilizes sulfuric acid plant's waste residue to produce PAFS.There is following deficiency in this patent: 1. because of the place of production difference of troilite, burn iron, aluminium content difference in the slag, thereby ferric sulfate, aluminum sulfate content in the final products PAFS can't be regulated, can not make the product adaptation market demand; 2. waste residue reaches without fragmentation and only utilizes the dilution heat release of sulfuric acid to keep reaction, and reaction is carried out not thorough; 3. use fully extractive reaction thing of flocculant natural subsidence three times, product yield is low, and final flocculating setting thing is unprocessed to cause secondary pollution.
Summary of the invention
At the deficiencies in the prior art, the object of the present invention is to provide a kind of process route feasible, equipment and raw material availability height, and a kind of troilite method of comprehensive utilization of adaptation market demand.
The objective of the invention is to be achieved: a kind of troilite comprehensive utilization method by following technical scheme, comprise with troilite and produce sulfuric acid, produce liquid aluminium sulfate with sulfuric acid and bauxite, liquid aluminium sulfate and pyrite cinder and sulfuric acid polymerisation are produced PAFS, and its feature may further comprise the steps:
(1) will burn slag and select to such an extent that high ferro is burnt slag and low iron burning slag with magnetic separator, it is broken that high ferro is burnt ground-slag;
(2) add liquid aluminium sulfate in proportion in reactor, high ferro seals after burning the ground-slag material, and metering pumps into sulfuric acid, keeps certain temperature and pressure, carries out polymerisation and reacts certain hour;
(3) reaction finishes, with reactant liquor pump into filter press filter first-time filtrate, get secondary cleaning water with clear water washing filter residue, first-time filtrate adds oxidant oxidation Fe
+ 2, becoming fluid product after making it drop to certain numerical value, secondary cleaning water returns produces liquid aluminium sulfate;
(4) wash filter residue with clear water, waste water in neutralizing tower and the back discharge;
(5) filter residue with after low iron burns slag mixing air dry as cement filler;
(6) fluid product through concentrate, dry after the powdering product.
In the above-mentioned technological process, high ferro is burnt slag can be crushed to 60～100 orders, and reaction condition is: utilize the dilution heat energy of the concentrated sulfuric acid, keeping reaction temperature is 100～115 ℃; Pressure is 0.01～0.03Mpa; Time is 1.5～3 hours.First-time filtrate makes Fe with oxidant
+ 2Drop to≤make fluid product after 0.2%, fluid product can concentrate by vacuum, spray-drying, after make the pulverulent solids product.
The present invention is according to the troilite of various different components, providing a kind of can both increase economic efficiency according to the dissimilar polyaluminium sulfate iron product of market demand, had expanded sulfuric acid market again, and solved the secondary pollution of filter residue, can improve the economic benefit of existing gas washing in SA production significantly.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is done to describe further, but do not constitute any limitation of the invention.
Fig. 1 has provided process flow diagram of the present invention, troilite comprehensive utilization method of the present invention, comprise and utilize troilite to produce sulfuric acid in the prior art, burning slag after the acquisition desulfurization, reach the technology of producing liquid aluminium sulfate with sulfuric acid and bauxite, the following examples provide concrete technical process.
Embodiment:
(1) with containing Al
2O
370% has calcined bauxite 714kg, adds secondary clear liquid 1500kg and is broken to all by 200 orders with the wet vibration abrasive dust.
(2) to 5M
3Reactor injects secondary clear liquid 1700kg, and the slurry with (1) injects reactor again, stirs.
(3) behind the sealed reactor, inject 98% sulfuric acid 650kg, reacted 40 minutes with acid-proof pump.
(4) pump into 98% sulfuric acid 650kg to reactor again, keeping 150 ± 15 ℃ of pressure of reaction temperature is 0.2～0.35MPa, reacts three hours.
(5) pump into reacting kettle jacketing with hot water (80～90 ℃), below the forced cooling to 120 ℃.
(6) in joining rare groove, inject secondary clear liquid 3200kg in advance, open reactor bottom valve (bottom valve is towards joining rare trench bottom) reactant liquor is mixed with the secondary clear liquid, obtain containing Al
2O
35% slag inclusion liquid aluminium sulfate 8414kg (slag content about 3%)
(7) pyrite cinder contains Fe
2O
343%, Al
2O
33.2%, Fe after magnetic separator separates
2O
3Content is 70%, Al
2O
3Be 2.8%: with pulverizer high ferro is burnt slag and be crushed to 80 orders.
(8) at 3M
3Inject the slag inclusion liquid aluminium sulfate of 2000kg (6) and the high ferro powder 860kg of input (7) in the reactor, stirred 20 minutes behind the sealed reactor.
(9) squeeze into 98% sulfuric acid 830kg with pump to reactor, keep reactor pressure, and keep reaction temperature reaction more than 100 ℃ two hours at 0.02Mpa ± 0.005Mpa.
(10) reaction finishes, and when reacting kettle jacketing water filling cooling makes reaction pressure drop to 0.01Mpa, opens the bottom valve that is communicated with mortar pump, and reactant liquor is pumped into filter press.
(11) first-time filtrate flows into semi-finished product clear liquid storage tank, obtains containing Al
2O
3〉=5%, contain the solution 2.25M of Fe 〉=8%
3
(12) with 2150kg clear water washing filter residue, wash water flows into the secondary cleaning water storage tank.
(13) with non-quantitative clear water washing filter residue, to washings PH 〉=6, with being pumped to neutralizing tower.
(14) lime stone of the built-in 3～5cm granularity of neutralizing tower is sprayed into neutralizing tower with waste water from the top and discharges from the bottom.
(15) filter residue is put into the stockyard natural air drying, burns slag with low iron and sells and give the cement plant and prepare burden.
(16) add 20～30kgH by every 1000kg semi-finished product clear liquid
2O
2Scope, inject H in oxidizing tower bottom
2O
2, sampling in per 10 minutes is once used 1% permanganate titration, calculates Fe
+ 2Ended in＜0.2 o'clock.Obtain the fluid product PAFS, proportion is about 42～44 Baume degrees.
In the above-described embodiments, by adding the amount of secondary clear liquid in the calculation procedure (6), can be with Al in the product liquid
2O
3Content in≤10%, regulate.Equally, the amount of middle high ferro powder in step (8)～(9) and sulfuric acid can make Fa+Al in the solid product among the adjustment embodiment
2O
3Content range in≤20%, regulate.43 Baume degrees product liquid with conventional vacuum concentrating apparatus to 55 Baume degrees, are sprayed into conventional hot air drying system with hot solution, obtain powdery polyaluminium sulfate iron product.Certainly, product liquid also can be concentrated to 58 Baume degrees, and blowing cooling back becomes solid product, smashes to 1～3cm, and packing is sold.As saving press filtration step (10) and oxidation step (16) operation in the above-described embodiments, be concentrated to 58 Baume degrees, can obtain the solid product of least cost.
Claims (4)
1, a kind of troilite comprehensive utilization method, comprise utilize troilite to produce sulfuric acid and obtain desulfurization after the burning slag, and produce liquid aluminium sulfate with sulfuric acid and bauxite, its feature may further comprise the steps:
(1) will burn slag and select to such an extent that high ferro is burnt slag and low iron burning slag with magnetic separator, it is broken that high ferro is burnt ground-slag;
(2) add liquid aluminium sulfate in proportion in reactor, high ferro seals after burning the ground-slag material, and metering pumps into sulfuric acid, keeps certain temperature and pressure, carries out polymerisation and reacts certain hour;
(3) reaction finishes, with reactant liquor pump into filter press filter first-time filtrate, get secondary cleaning water with clear water washing filter residue, first-time filtrate adds oxidant oxidation Fe
+ 2, becoming fluid product after making it drop to certain numerical value, secondary cleaning water returns produces liquid aluminium sulfate;
(4) wash filter residue with clear water, waste water in neutralizing tower and the back discharge;
(5) filter residue with after low iron burns slag mixing air dry as cement filler;
(6) fluid product through concentrate, dry after the powdering product.
2. method according to claim 1 is characterized in that: the high ferro of step (1) is burnt slag and is crushed to 60～100 orders.
3. method according to claim 1 is characterized in that: the reaction condition of step (2) is: utilize the dilution heat energy of sulfuric acid, keeping reaction temperature is 100～115 ℃; Pressure is 0.01～0.03Mpa; Time is 1.5～3 hours.
4, method according to claim 1 is characterized in that: its quality index of fluid product can be by adding the concentration adjustment alumina content of liquid aluminium sulfate in the step (3); Calculate the increase and decrease high ferro and burn the quantity regulating iron content of slag and sulfuric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03146934 CN1235689C (en) | 2003-09-25 | 2003-09-25 | Method for comprehensive utilization of sulfur iron ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03146934 CN1235689C (en) | 2003-09-25 | 2003-09-25 | Method for comprehensive utilization of sulfur iron ore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1600457A CN1600457A (en) | 2005-03-30 |
| CN1235689C true CN1235689C (en) | 2006-01-11 |
Family
ID=34659729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03146934 Expired - Fee Related CN1235689C (en) | 2003-09-25 | 2003-09-25 | Method for comprehensive utilization of sulfur iron ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1235689C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973586B (en) * | 2010-10-14 | 2012-08-15 | 广西天工冶金科技有限公司 | Method for preparing polymeric aluminum ferric sulfate by using aluminium ore washing gangue |
| CN102367169B (en) * | 2011-05-23 | 2013-06-12 | 中国石油化工集团公司 | Method for preparation of sulfuric acid and combined production of fine flour iron through calcination of coal-derived pyrite in presence of oxygen-rich air |
| CN103585738A (en) * | 2013-11-06 | 2014-02-19 | 和丽萍 | Method for neutralizing sulphur smelting waste by quick lime |
| CN107055625A (en) * | 2017-05-31 | 2017-08-18 | 江苏省冶金设计院有限公司 | The apparatus and method that a kind of utilization magnetic separation tailings prepares PAFC |
| CN117862142A (en) * | 2024-03-11 | 2024-04-12 | 招远市招金金合科技有限公司 | High-speed railway sulfuric acid send melting slag to retrieve refining equipment |
-
2003
- 2003-09-25 CN CN 03146934 patent/CN1235689C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1600457A (en) | 2005-03-30 |
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