CN1005917B - Method of producing iron oxide red pigment - Google Patents
Method of producing iron oxide red pigment Download PDFInfo
- Publication number
- CN1005917B CN1005917B CN86100780.8A CN86100780A CN1005917B CN 1005917 B CN1005917 B CN 1005917B CN 86100780 A CN86100780 A CN 86100780A CN 1005917 B CN1005917 B CN 1005917B
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- CN
- China
- Prior art keywords
- ferric
- red
- ferric oxide
- calcining
- oxide red
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- 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.)
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- Paints Or Removers (AREA)
Abstract
The present invention relates to a method for manufacturing ferric oxide red pigments. Industrial cinders which comprise more than 70% of ferric oxide react with sulfuric acid to generate ferric sulphate; double regeneration ferric oxide is obtained by calcining; water soluble salt is removed by crushing and rinsing so a ferric oxide red pigment is manufactured. Low price raw materials used for manufacturing ferric calcining ferric red which has high anti-rust performance are found by the method. The cost is lower than that of wet method ferric red and ferrous ferric red, and the anti-rust performance is high. Besides, the present invention has the characteristics of high temperature resistance and insolation resistance. Owing to industrial production, rich raw materials, low cost and high product quality, the present invention is widely used for anti-rust priming paint of ships and metal components and filling colorants of ceramic, rubber, and plastic, and for plastering historical buildings.
Description
The invention belongs to the manufacture method of ferric oxide red colorant.Prior art is generally made ferric oxide red colorant with wet method.Make red iron oxide as adding nitration mixture with the soft iron sheet, its coloured light of the red iron oxide that wet method makes is comparatively bright-coloured, and dispersity is better in system lacquer process, but its cost height, rustless property low (ultraviolet brine spray case test is generally about 300 hours), non-refractory and Exposure to Sunlight.
Also the someone adopts the method for calcining ferrous sulfate to produce red iron oxide, and the red iron oxide that this technology makes is called the dry method iron oxide red.The ferrous iron oxide red rustless property of dry method is higher than wet method iron oxide red (spray testing is generally about 400 hours), and cost is a little less than the wet method iron oxide red, and other performance is only second to the wet method iron oxide red.
The purpose of this invention is to provide a kind of method of making ferric oxide red colorant.I.e. industrial burned dregs and sulfuric acid reaction by containing 70% above ferric oxide generates ferric sulphate, makes red iron oxide through calcining, pulverizing, rinsing, oven dry then.
This invention former is to adopt to contain coal iron sulphide and be set to low temperature eremacausis fire heap by certain method training, through 30～35 days low-temperature oxidation, makes it the generating portion ferric sulphate, again through leaching, concentrate, oven dry.Calcining, rinsing, pulverizing and make red iron oxide.But the fiery heap method of this kind mode of production falls behind, and production environment is extremely abominable, and 30% of sulphur obtains utilizing in the raw material, and 70% goes in the atmosphere, so not only serious pollution environment, and wasted a large amount of sulphur resources, this method incompatibility industrial production.
On the basis of the fiery heap method of research, found out the mechanism of whole chemical reaction process, and the manufacture method of having invented this ferric oxide red colorant.
Now details are as follows with the manufacture method of ferric oxide red colorant of the present invention: use the sulfuric acid of 50～75% concentration and the industrial burned dregs of trioxygen-containingization two iron 70% or more to react the generation ferric sulphate.Its proportioning:
H
2SO
4∶Fe
2O
3＝1.3～1.8∶1。
Reaction formula is as follows:
Fe
2O
3+H
2SO
4+H
2O→Fe
2（SO
4）
3·7H
2O
This reaction is to finish in the retort of band agitator jacket steam insulation.Holding temperature is 80 ℃, 3～5 minutes reaction times (deciding on raw material trioxygen-containingization two iron amounts).The material that the reaction back generates is put into long 30 meters dryer, dries under little negative pressure.Bake out temperature: import is 300 ℃, and outlet is 800 ℃, removes till the crystal water, and gas enters the vent gas treatment tower through blower fan.
The material of oven dry is 10～30 millimeters a piece through pulverizing, sends into 1.5 * 24 meters rotary kilns of φ with chapelet, with heavy oil calcining, calcining temperature; 300 ℃～400 ℃ on kiln tail, 850 ℃～900 ℃ of kiln hoods (discharge end).Calcination time is 1.5 hours, and gas imports the imines gas recovery system in the calcining kiln.
Relevant reaction formula is as follows in the rotary kiln:
Fe
2（SO
4）
3→Fe
2O
3+SO
3↑
H
2+SO
3→SO
2↑+H
2O
Material after the calcining is sent into feed bin through chapelet, and the water that adds ten times through Universalpulverizer carries out case of wet attrition, with being pumped into the rinsing post, carries out rinsing.Water soluble salt content is dropped to below 0.5% (to be detected with hot extraction process).
The oven dry of rinsing qualified material input airflow dryer is directly sent into thunder illiteracy pulverizer and is carried out superfine grinding, makes product reach 320 mesh sieves, by 99.5%.Trioxygen-containingization two iron more than 75% (potassium dichromate process) be the fine finished product.
The red iron oxide product that utilizes the manufacture method of this invention ferric oxide red colorant to make, its cost is all lower than wet method iron oxide red and ferrous iron oxide red, and good antirust property (spray testing is more than 600 hours) is high temperature resistant, anti-tanning by the sun.Several the performance index of this product all are better than the wet method iron oxide red.
Because this product has low, the good antirust property of cost, high temperature resistant, anti-distinguishing feature such as tan by the sun is so be widely used in the whitewashing of rust-proofing primer, pottery, rubber, the agent of plastics filled coloring and heritage buildings of boats and ships and hardware.
The present invention has found low price raw material and rational production technique for obtaining the high ferro calcining iron oxide red of high rustless property, makes resource obtain comprehensive utilization, for transforming the old mode of production, changes production environment, and novel method for manufacturing is provided.Utilize this invention, can carry out the big industrial production of mechanize, it is low to produce cost, the ferric oxide red colorant of excellent property.
Embodiment one
In the retort of the jacket steam of 1000 liter belt stirrers insulation, adds 450 kilogram 50% sulfuric acid and the industrial burned dregs more than 300 kilograms of trioxygen-containingization two iron 70%, 80 orders, under condition of stirring, interlayer reacts after 3 minutes with 80 ℃ of steam insulations, puts into long 30 meters dryer.300 ℃ of opening for feed temperature, 800 ℃ of discharge port temperature.Remove the crystal water in the material.The oven dry material is 10～30 mm pieces through pulverizing, sends into φ 1.5M * 24M calcined by rotary kiln with chapelet.Calcining temperature, kiln tail are 300～400 ℃, and kiln hood is 850～900 ℃, calcination time 1.5 hours.Material after the calcining is sent into storage bin through chapelet, adds 10 times of water through Universalpulverizer and carries out case of wet attrition.Slurries are sent into the rinsing post through slush pump and are carried out rinsing, and water-soluble salt is dropped to below 0.5%.
The rinsing qualified material is dried through airflow dryer, sends into thunder and covers pulverizer, carries out superfine grinding, makes fineness reach 320 mesh sieves, is finished product by 99.5%.
Embodiment two
Technological process is with embodiment one, and proportioning raw materials is the industrial burned dregs of 830 kilograms in 50% sulfuric acid and 300 kilograms.
Embodiment three
Technological process is with embodiment one, and proportioning raw materials is 385 kilograms and 300 kilograms industrial burned dregs of sulfuric acid of 75%.
Embodiment four
Technological process is with embodiment one, and proportioning raw materials is 550 kilograms and 300 kilograms industrial burned dregs of sulfuric acid of 75%.
In a word, be between 50～75% at sulfuric acid concentration, the proportioning of the industrial burned dregs of sulfuric acid and trioxygen-containingization two iron more than 70% all can make ferric oxide red colorant by the present invention between 1.3～2.8 times.But it is few more to add the acid amount, and cost is low more, and quality product is poor more.Dark as coloured light, oil number, dispersity and to look specific volume also low more, along with the increase of acid amount, cost up, coloured light is vivid, oil number, dispersity and to look specific volume also good more.
Claims (9)
1, a kind ofly prepares the manufacture method of ferric oxide red colorant, it is characterized in that, use Fe with sulfuric acid and ferric oxide
2O
3Industrial burned dregs more than 70% (component 1) and concentration are 50～75% sulfuric acid (component 2) reaction,
Component 1: component 2=1: 1.3～2.8
Its step is as follows:
(1) with the said ratio material, under stirring state, be incubated 80 ℃ of reactions 3～5 minutes,
(2) oven dry, 800 ℃ of control discharge port temperature,
(3) calcining, 300～400 ℃ of kiln end temperatures, 850～900 ℃ of temperature of kiln head were calcined 1.5 hours,
(4) material adds 10 times of water and carries out case of wet attrition,
(5) material makes its water soluble salt content less than 0.5% through the clear water rinsing,
(6) behind the drying materials,, make its fineness reach 320 mesh sieves, contain Fe by 99.5% through superfine grinding
2O
3More than 75%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86100780.8A CN1005917B (en) | 1986-01-28 | 1986-01-28 | Method of producing iron oxide red pigment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86100780.8A CN1005917B (en) | 1986-01-28 | 1986-01-28 | Method of producing iron oxide red pigment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86100780A CN86100780A (en) | 1987-10-07 |
| CN1005917B true CN1005917B (en) | 1989-11-29 |
Family
ID=4801197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86100780.8A Expired CN1005917B (en) | 1986-01-28 | 1986-01-28 | Method of producing iron oxide red pigment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1005917B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036775C (en) * | 1994-03-16 | 1997-12-24 | 南京化学工业(集团)公司研究院 | Method for preparing high-content iron oxide red pigment from iron-containing industrial cinder |
| CN101508851B (en) * | 2009-03-10 | 2011-10-26 | 广州化工研究设计院 | Novel environment friendly high-efficiency rust-preventive pigment and method for producing the same |
| CN102126759B (en) * | 2011-01-19 | 2012-12-12 | 河北师范大学 | Environment-friendly synthesis method of pigment-grade iron oxide red |
| CN106381380A (en) * | 2016-08-28 | 2017-02-08 | 浙江人通电力科技有限公司 | Oxidation treatment process for iron oxide scale |
| CN107955411A (en) * | 2017-11-03 | 2018-04-24 | 安徽奥邦新材料有限公司 | A kind of modified oxidized iron oxide red pigment |
| CN108128812A (en) * | 2018-02-01 | 2018-06-08 | 吉林大学 | A kind of iron oxide red and its preparation method and application |
-
1986
- 1986-01-28 CN CN86100780.8A patent/CN1005917B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN86100780A (en) | 1987-10-07 |
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