CN1040094C - Process for producing high grade iron oxide red from limonite - Google Patents
Process for producing high grade iron oxide red from limonite Download PDFInfo
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- CN1040094C CN1040094C CN95119326A CN95119326A CN1040094C CN 1040094 C CN1040094 C CN 1040094C CN 95119326 A CN95119326 A CN 95119326A CN 95119326 A CN95119326 A CN 95119326A CN 1040094 C CN1040094 C CN 1040094C
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- iron oxide
- industry
- oxide red
- limonite
- ore
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Abstract
The present invention discloses a production process for producing iron oxide red by using limonite, which uses natural rich brown iron ores to obtain high-grade iron oxide red pigments through the procedures of mining, concentrating, baking, pulverizing, water washing dissolving, filter-pressing baking, calcining, superfine grinding, finished goods packing, etc. Various rationalization indexes of product quality all achieve national standards. The present invention has the characteristics of high content of Fe2O3, good colour and easy dispersion. The quality indexes of the iron oxide red approaches to the quality indexes of the artificially synthesized iron oxide red. The present invention has the advantages of simple process, economy and applicability, and can be widely used for industry, such as paint industry, coating industry, plastic industry, rubber industry, ceramic industry, glass industry, building industry, etc.
Description
The invention belongs to natural iron oxide red production method, particularly utilize the production technique of limonite production red iron oxide.
Red iron oxide (Fe
2O
3) be a kind of important chemical material, it also is one of bigger mineral dye of consumption, have strong covering power, characteristics such as strong coloring force, high temperature resistant, fast light, nontoxic, insoluble dry acid are widely used in industries such as paint, coating, plastics, rubber, pottery, glass, building.The production technique of ferric oxide red colorant can be divided into two kinds of synthetic method and natural mineral roasting methods substantially, and natural iron oxide red production generally is to be that main raw material makes through the dry method roasting with the rhombohedral iron ore in the prior art.Patent Office of the People's Republic of China's disclosed " a kind of production method of ferric oxide red colorant " (application number 901041572, publication number CN1057277A) introduced in and utilized natural jacutinga stone, through pulverizing, ball milling, classification, ore dressing, classified filtering, oven dry, calcining and obtain the production method of ferric oxide red colorant.
The objective of the invention is to utilize limonite to produce high grade iron oxide red pigment through high-temperature calcination.
The domestic iron ore of forestry bureau was a limonite during exhaled in Daxing'an Mountainrange the Heilongjiang Province, and spectrum analyzer qualitative analysis mineralogical composition is mainly pyrrhosiderite through Changchun Geology Colledge, and molecular formula is FeO (OH), also had ferrous salt Fe
2S
2, Fe (SO
4), FeSiO
3Deng, also have metal oxide, carbonate, nitrate, muriate, crystal water, planar water, organic matters etc. such as Si, Ti, Al, Ca, Mg, K, Na in addition, transfer repeatedly samples contg analytical results of two groups from ground, Heilongjiang Province, the content of various compositions is Fe
2O
3Content is at 60-75%, SiO
2Content is at 1-15%, TiO
2Content is at 0.2-1.2%, Al
2O
3Content is at 1-17%, and the content of other oxide compound is aggregated in about 1%, and loss on ignition is between 16-23%, the complete analysis of iron ore as can be seen from exhale, this ore iron amount is higher, and the higher impurity of content is more concentrated, in high-temperature calcination, science control by temperature and time, can reduce loss on ignition significantly, major impurity can pass through ore hand sorting, the washing dissolving, methods such as calcining volatilization, fine powder precipitation are removed, thereby improve the content and the purity of iron oxide red.Production technique of the present invention is as follows:
(1) at first ore hand sorting, choose removal of impurities stone;
(2) above-mentioned limonite ore is dried, make its water ratio be less than or equal to 8%;
(3) above-mentioned limonite ore is crushed to 325 orders;
(4) above-mentioned limonite ore is washed dissolving, remove soluble salt and solvend in the ore;
(5) above-mentioned limonite ore filter-press dehydration is dried to water ratio and be less than or equal to 10%;
(6) with above-mentioned limonite ore 800 ℃ roasting temperature 20 minutes, its main chemical reactions equation is as follows:
7. will carry out superfine grinding to 1250 order after the above-mentioned red iron oxide cooling:
8. above-mentioned red iron oxide product is carried out finished product packing.
The red iron oxide product that adopts production technique of the present invention to produce, the every physical and chemical index of the quality product Fe that all is up to state standards
2O
3Content can reach more than 92%, and content height, color are good, easily disperse, on the quality near the quality index of synthetic iron oxide red product, and technology is simple, economical and practical.
The present invention is further described below in conjunction with embodiment:
The limonite ore that at first will adopt is back carried out hand picking and is removed assorted stone, the waste heat that utilizes kiln is then dried ore to water ratio and is less than or equal to 8%, in Raymond machine, ore powder is broken to 325 orders then, in the pond, precipitate 24 hours in the ratio of 1 part of material and 2 parts of water then and wash dissolving, remove the water on upper strata and the material of bottom, the material of getting the middle layer dewaters in pressure filter, utilize the waste heat of kiln to dry again to water ratio and be less than or equal to 10%, carry out the kiln roasting after pulverizing, temperature is 800 ℃, time is 20 minutes, and the cooling back is crushed to 1250 orders with it in ultrafine crusher, carry out finished product packing and get final product.
Claims (1)
1. utilize limonite to produce high grade iron oxide red production technique, comprising:
(1) at first carry out ore hand sorting, choose removal of impurities stone;
(2) above-mentioned limonite ore is dried to water ratio and be less than or equal to 8%;
(3) above-mentioned limonite ore is crushed to 325 orders;
(4) with above-mentioned limonite ore washing dissolving, remove the solvend in the ore;
(5) above-mentioned limonite ore filter-press dehydration is dried to water ratio and be less than or equal to 10%;
(6) with above-mentioned limonite ore 800 ℃ roasting temperature 20 minutes;
(7) will carry out superfine grinding to 1250 order after the above-mentioned red iron oxide cooling;
(8) above-mentioned red iron oxide product is carried out finished product packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95119326A CN1040094C (en) | 1995-11-23 | 1995-11-23 | Process for producing high grade iron oxide red from limonite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95119326A CN1040094C (en) | 1995-11-23 | 1995-11-23 | Process for producing high grade iron oxide red from limonite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1129673A CN1129673A (en) | 1996-08-28 |
| CN1040094C true CN1040094C (en) | 1998-10-07 |
Family
ID=5081955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95119326A Expired - Fee Related CN1040094C (en) | 1995-11-23 | 1995-11-23 | Process for producing high grade iron oxide red from limonite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1040094C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110976033B (en) * | 2019-11-20 | 2022-02-08 | 郑州中科新兴产业技术研究院 | Method for preparing iron oxide red from specularite |
| CN114715949B (en) * | 2022-04-22 | 2023-05-09 | 中国科学院兰州化学物理研究所 | Processing technology of natural jarosite mineral pigment |
| CN114806221A (en) * | 2022-04-22 | 2022-07-29 | 中国科学院兰州化学物理研究所 | Processing technology of natural clay yellow mineral pigment for repairing mural |
| CN115196686A (en) * | 2022-08-24 | 2022-10-18 | 中钢集团南京新材料研究院有限公司 | Method for large-scale preparation of high-purity iron oxide red |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1082513A (en) * | 1993-07-02 | 1994-02-23 | 叶继雄 | Produce the method for synthetic iron oxide red from magnetite |
| CN1102626A (en) * | 1994-10-26 | 1995-05-17 | 周永复 | Method for prodn. of high pure iron oxide red by ammonia-soda process |
-
1995
- 1995-11-23 CN CN95119326A patent/CN1040094C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1082513A (en) * | 1993-07-02 | 1994-02-23 | 叶继雄 | Produce the method for synthetic iron oxide red from magnetite |
| CN1102626A (en) * | 1994-10-26 | 1995-05-17 | 周永复 | Method for prodn. of high pure iron oxide red by ammonia-soda process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1129673A (en) | 1996-08-28 |
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