CN1884099A - Method for preparing manganese sulfate by reduction leaching of manganese ore using discard molasses and sulfuric acid - Google Patents
Method for preparing manganese sulfate by reduction leaching of manganese ore using discard molasses and sulfuric acid Download PDFInfo
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Abstract
The invention discloses a new preparing method of manganese sulfate through manganese oxide in the manganese ore in the leaching manganese ore extracting and manufacturing technological domain, which comprises the following steps: grinding manganese ore; moulding ore paste through water; adding sulfuric acid and waste molasses in the ore paste; stirring at 40-100 deg.c to obtain leaching liquid; neutralizing the leaching liquid through limestone; adding ammonia sulfate to remove heavy metal ion; adding ammonium fluoride solution to remove Ca2+, Mg2+; evaporating; condensing; crystallizing; drying to produce manganese sulfate with over 98 percent purity and 93 percent manganese collecting rate.
Description
Technical field:
The present invention relates to a kind of manganous sulfate production method, particularly make reductive agent with waste molasses, the sulfuric acid to leach manganese ore prepares the method for manganous sulfate.
Background technology:
Sucrose is to be that raw material makes with sugarcane or beet, and waste molasses is the by product of sugaring process, contains reducing substanceses such as rich saccharide.Contain as cane molasses: sucrose 25%～35%, Nulomoline 15%～25%, colloid 9%～11%, and other organic reducing substances and ash grade.The beet waste molasses contains 40% the sucrose of having an appointment, and other carbohydrate is about 10%.In sugar production process, waste molasses is about 3% of sugarcane weight, and the annual by-product waste molasses of China is more than 2,000,000 tons.Therefore, waste molasses is a kind of recyclability resource of originating abundant, cheap.
The manganese ore that contains Manganse Dioxide as pyrolusite, psilomelane, ocean tuberculosis manganese ore etc., is a main raw material of producing manganese salt.Manganse Dioxide in the manganese ore is insoluble to sulfuric acid, must be reduced into manganese monoxide (MnO) to it by reduction reaction, and ability and sulfuric acid reaction generate manganous sulfate.
Manganous sulfate is the main raw material of manganese products such as preparation manganous carbonate, Manganse Dioxide, trimanganese tetroxide and electrolytic manganese.The existing method for preparing manganous sulfate with manganese ore reduction mainly contains three kinds:
1. coal reducing roasting---sulfuric acid leaching.This method has semicentennial history, is traditional processing technology, technology maturation, and the quality of manganous sulfate is good.But the SO that it produces
2, serious dust pollution of the environment, coal consumption amount is big.
2. two ore deposit roasting methods.With manganese ore and sulfurous iron ore separated pulverizing, mix, 500 ℃～600 ℃ roasting temperatures 0.5～1 hour, then with the clear water leaching, separate slag after condensing crystal obtain manganous sulfate.This method equally also can produce SO
2And dust, contaminate environment.
3. wet reducing extract technology.With manganese ore, sulfuric acid and a certain amount of reductive agent hybrid reaction, use water extraction at a certain temperature, condensing crystal obtains manganous sulfate behind the filtration wet slag.Because this technology avoided the high-temperature roasting operation, can not produce and contain SO
2Waste gas, and, simplified technology for single stage method leaches, therefore, this method is the developing direction for preparing manganous sulfate with manganese ore.In order to obtain a kind of reductive agent preferably, people have found out many methods, have reported some relevant documents as open source literature, and we take passages as follows by retrieval:
1. [application (patent) number] CN91102845.5[title] wet producing manganese sulfate from two kinds of mine novel process [application (patent right) people] No. 44 [summary] these methods in guest road, lake, Huangshi, Huangshi Power Source Comprehensive Scientific and Technical Inst. [address] 435000 Hubei Province with poor, bad, give up contain MnO
2Manganese ore powder and troilite powder add sulphuric acid soln, generate manganese sulfate solution after the reacting by heating, remove iron ion in the solution with feeding compressed-air actuated method again.
2. [application (patent) number] CN87102046[title] with the sulfurous iron ore reductive agent with method [applying for (patent right) people] this method of cypress village, Guiyang County outskirts of a town township, Electrolytic Manganese Factory, Guiyang County [address] Hunan Province [summary] of producing manganous sulphate solution from manganese dioxide ore, directly soak fine-graded dioxide ore for manganese with sulphuric acid soln, its reaction formula is:
, when temperature of reaction is 85～100 ℃, in 2～4 hours reaction times, reaction end pH value is 6.8～7 o'clock, the leaching rate of Manganse Dioxide is greater than 90%.
3. [application (patent) number] CN200310110442.3[title] pyrolusite do not have method [applying for (patent right) people] No. 404 [summary] these methods of Tian Xueda [address] 410006 Changsha, Hunan new people Lu Shuntai pavilions pyrolusite MnO that the coal reduction prepare manganese sulfate solution
2Make raw material, biogas (CH
4) make reductive agent, by generating the intermediate product that mainly contains MnO after the reduction reaction; Add a certain amount of sulfuric acid then, obtain manganese sulfate solution by leaching technology, reduction reaction is divided two steps: the first step, make reductive agent with biogas, and under the normal temperature aerobic conditions, light biogas, the biogas burning makes pyrolusite powder become the red heat state; Second step, cut off the air supply, continue to supply biogas and continue to add pyrolusite powder, this moment red heat pyrolusite powder and biogas direct reaction, this process liberated heat is kept heating makes initiate pyrolusite powder become the red heat state, continues and the biogas direct reaction, keeps reaction to proceed.
4. [application (patent) number] CN89105118.X[title] a kind of production method [application (patent right) people] Shujiatun District chemical industry technical service station, Chemical Technique Service Centre of Sujiatun District Shenyang City [address] ShenYang, Liaoning Province city [summary] employing manganese content of manganous sulfate puts into reaction tank after mixing greater than 8% manganese ore and rice skin, add dilute sulphuric acid, carry out thermopositive reaction at normal temperatures.Each raw material proportioning by weight is: 15～20 parts of manganese ores, 2～3 parts of rice skins, 20～30 parts of dilute sulphuric acids.When pH value of reactants equals 5, take out with manganese sulfate solution and isolate unreacted intact ore and mud.Filter cake after mud filters with filter, adverse current is drained after repeatedly washing, and the high dope that provides is made through deironing, evaporation, crystallization, drying, crushing packing.
5. the Chinese manganese industry of [autograph] hydrocarbon polymer wet processing manganese-silver ore applied research [author] surplus beautiful show of Sun Yaguang [mechanism] Zhengzhou mineral products comprehensive utilizating research institute [periodical name] .2004,22 (1): the 1-14[digest] study hydrocarbon polymer and soaked manganese-cyaniding silver leaching process principle, condition and application, utilize hydrocarbon polymer and Manganse Dioxide reactions such as starch, sucrose, when control manganese leaching yield 96%, leaching rate of loss＜2% of silver; Soak the manganese slag and adopt the cyanide process desilver, when NaCN consumption 1kg/t slag, extraction time 3h, silver leaching rate 94.15%; Soak two steps of manganese-cyaniding and leach the rate of recovery of silver greater than 92.27%.
6. [autograph] chaff-sulfuric acid directly soaks flat Song of preparation of manganese condition research [author] Yang Ming and pays chemical institute of Li Guobin [mechanism] University Of Science and Technology Of Hunan [periodical name] inorganic chemicals industry, 2005, the 02[digest] be raw material with rice bran and western Hunan pyrolusite, rice bran-sulfuric acid is directly soaked the processing condition that manganese prepares manganous sulfate study.The result shows that the optimum process condition that rice bran-sulfuric acid process is soaked manganese is: soak 250 ℃ of manganese temperature, sulfuric acid massfraction 50% soaks manganese time 75min, and the rice bran consumption is 20% of a pyrolusite powder quality, and the sulfuric acid consumption is 110% of its theoretical consumption.Soak manganese by these processing condition, the leaching yield of manganese can reach more than 95%.
What 7. [autograph] pure plant powder-sulfuric acid process directly leached pyrolusite puts into practice chemical institute of [author] poplar children flat Huang Kelong [mechanism] Central South University [periodical name] Chinese Mining Industry 2001,10 (5): the 54-56[digest] studied with pure plant powder-vitriol oil method and directly leached the new process of pyrolusite.Test-results shows: the leaching yield of manganese is subjected to the influence of factors such as pyrolusite consumption, pure plant powder consumption, vitriol oil consumption, extraction temperature and extraction time in the pyrolusite.This method is under preferable processing condition, and the leaching yield of manganese can reach more than 95%.Directly leach in the new process of pyrolusite at pure plant powder-sulfuric acid, the leaching yield of manganese is subjected to having the greatest impact of vitriol oil consumption in the pyrolusite, its optimum process condition is: sour ore deposit ratio is 2～3: 1 (ml: g), pyrolusite/pure plant powder ratio is 210～313: 1, liquid-solid ratio is 3: 1, extraction temperature is 90 ℃～95 ℃, and extraction time is 3h, and the leaching yield of manganese can reach more than 95% in the pyrolusite at this moment.
Recognize from above-mentioned result for retrieval, the open source literature introduction mainly be: 1. and 2. document is to use wet producing manganese sulfate from two kinds of mine, the production technology maturation, production cost is lower.But exist the quantity of slag big aborning, it is many to bring impurity into, the problem of filtering and impurity removing difficulty.3. document uses the CH in the biogas
4Make reductive agent, because of biogas does not contain inorganics, so reductive agent is not brought solid impurity into, the easily more purified manganous sulfate of acquisition, and waste water is easy to handle, but this method CH
4Reducing power is poor, leaching yield is low.5. document uses sucrose to make reductive agent, because of sucrose does not contain inorganics substantially, so it is few to bring impurity into, easily obtain more purified manganese sulfate solution, and waste water is easy to handle.But, can cause the rising of production cost because of sucrose price height.4., 6. and 7. document uses pure plant powder to make reductive agent, and its advantage is to utilize local various pure plant powder resource, and reductive agent is cheap and easy to get.But there is pure plant powder hydrolysis saccharogenesis difficulty, needs higher temperature of reaction to reach the more problem of polyacid.In sum, at present the reductive agent that adopted of wet reducing extract technology is also undesirable.
Summary of the invention:
The purpose of this invention is to provide the manganous sulfate preparation method that a kind of raw material sources are cheap easily, manufacturing requirements is lower, it is characterized in that utilizing waste molasses to make the method that reductive agent sulfuric acid to leach manganese ore prepares manganous sulfate.
Above-mentioned said waste molasses is the by product after sugarcane or the beet sugar manufacture, and invert sugar content such as its sucrose content is 25～35%, fructose and glucose is 15～25%, and colloidal content is 9%～11%, and the organic reducing substances and the ash that contain other grade.
Above-mentioned said manganese ore comprises that pyrolusite, psilomelane, ocean tuberculosis manganese ore etc. contain MnO
2Manganese ore, its MnO
2Content greater than 20%.
The present invention is achieved in that manganese ore is crushed to 40～400 orders, with 2～10 times of water modulation ore pulps of manganese ore quality; Add 0.3～0.9 times of concentration of manganese ore quality in the ore pulp and be 93～98% sulfuric acid and 0.1～0.8 times waste molasses of manganese ore quality, stirring reaction obtained reacting leach liquor in 0.3～5 hour under 40～100 ℃ of temperature; It is 5.5～6.0 that the reaction leach liquor is neutralized to the pH value with Wingdale, and 1%～3% concentration in 50～80 ℃ of following adding pyrolusite quality of temperature is the 0.5mol/L ammonium sulfide solution then, makes Cu
2+, Ni
2+, Zn
2+, Co
2+Remove etc. heavy metal ion generation sulfide precipitation, left standstill 12～24 hours, filter.In filtrate, add liquor C a
2+, Mg
2+2～2.4 times of concentration of ion total mole number are the 1mol/L ammonium fluoride solution, make Ca
2+, Mg
2+Ion generates CaF
2, MgF
2Precipitation is removed, and filters to obtain the purified manganese sulfate solution.The purified manganese sulfate solution through evaporation, concentrate, crystallization and drying, obtain purity greater than 98% manganese sulfate product, the yield of manganese is greater than 93%.
The present invention compares with existing extractive technique, and its outstanding substantive distinguishing features and obvious improvement is:
(1) the employed reductive agent waste molasses by product that is the sugaring process is a kind of recyclability resource of cheapness, and the manganous sulfate production cost reduces 10～15% than adopting sucrose to make reductive agent.
(2) compare as reductive agent with adopting biogas or pure plant powder, the reaction conditions gentleness, speed of response is fast, and leaching process waste residue amount is few, filters easily MnO
2Yield can improve more than 10%.
(3) compare as reductive agent with adopting sulfurous iron ore, the inorganic impurity of introducing is few, and the purification of follow-up leach liquor is simplified greatly, and manganous sulfate purity is greater than 98%.
Embodiment:
Embodiment 1
Manganese ore is crushed to 100 orders (forming as shown in table 2), with the water modulation ore pulp of 4 times of manganese ore quality; Add 0.7 times of concentration of manganese ore quality in the ore pulp and be the waste molasses (forming as shown in table 1) of 0.2 times of 98% sulfuric acid and manganese ore quality, stirring reaction obtained reacting leach liquor in 2 hours under 95 ℃ of temperature.It is 5.8 that the reaction leach liquor is neutralized to the pH value with Wingdale, and 3% concentration in 70 ℃ of following adding pyrolusite quality of temperature is the 0.5mol/L ammonium sulfide solution then, makes Cu
2+, Ni
2+, Zn
2+, Co
2+Remove etc. heavy metal ion generation sulfide precipitation, left standstill 20 hours, filter.In filtrate, add liquor C a
2+, Mg
2+2.4 times of concentration of ion total mole number are the 1mol/L ammonium fluoride solution, make Ca
2+, Mg
2+Ion generates CaF
2, MgF
2Precipitation is removed, and filters to obtain the purified manganese sulfate solution.The purified manganese sulfate solution through evaporation, concentrate, crystallization and drying, obtain purity 98.6% manganese sulfate product, the Mn yield is greater than 94%.
The composition analysis of table 1 cane molasses
| Composition | Sucrose | Nulomoline | Colloid | Ash content |
| Content (%) | 31.5 | 18.3 | 9.7 | 13.1 |
The composition analysis of table 2 pyrolusite
| Composition | Total Mn | MnO 2 | Fe | SiO 2 | Al 2O 3 | CaO | MgO | S | P |
| Content (%) | 22.25 | 31.78 | 12.35 | 24.17 | 11.36 | 0.12 | 0.12 | 0.005 | 0.078 |
Embodiment 2
Manganese ore is crushed to 200 orders (forming as shown in table 2), with the water modulation ore pulp of 10 times of manganese ore quality; Add 0.9 times of concentration of manganese ore quality in the ore pulp and be the waste molasses (forming as shown in table 1) of 0.1 times of 98% sulfuric acid and manganese ore quality, stirring reaction obtained reacting leach liquor in 3 hours under 100 ℃ of temperature.It is 5.7 that the reaction leach liquor is neutralized to the pH value with Wingdale, and 2% concentration in 80 ℃ of following adding pyrolusite quality of temperature is the 0.5mol/L ammonium sulfide solution then, makes Cu
2+, Ni
2+, Zn
2+, Co
2+Remove etc. heavy metal ion generation sulfide precipitation, left standstill 24 hours, filter.In filtrate, add liquor C a
2+, Mg
2+2.3 times of concentration of ion total mole number are the 1mol/L ammonium fluoride solution, make Ca
2+, Mg
2+Ion generates CaF
2, MgF
2Precipitation is removed, and filters to obtain the purified manganese sulfate solution.The purified manganese sulfate solution through evaporation, concentrate, crystallization and drying, obtain purity 98.0% manganese sulfate product, the Mn yield is greater than 93%.
Embodiment 3
Manganese ore is crushed to 40 orders (forming as shown in table 2), with the water modulation ore pulp of 2 times of manganese ore quality; Add 0.7 times of concentration of manganese ore quality in the ore pulp and be the waste molasses (forming as shown in table 1) of 0.35 times of 98% sulfuric acid and manganese ore quality, stirring reaction obtained reacting leach liquor in 5 hours under 40 ℃ of temperature.It is 5.5 that the reaction leach liquor is neutralized to the pH value with Wingdale, and 3% concentration in 70 ℃ of following adding pyrolusite quality of temperature is the 0.5mol/L ammonium sulfide solution then, makes Cu
2+, Ni
2+, Zn
2+, Co
2+Remove etc. heavy metal ion generation sulfide precipitation, left standstill 12 hours, filter.In filtrate, add liquor C a
2+, Mg
2+2 times of concentration of ion total mole number are the 1mol/L ammonium fluoride solution, make Ca
2+, Mg
2+Ion generates CaF
2, MgF
2Precipitation is removed, and filters to obtain the purified manganese sulfate solution.The purified manganese sulfate solution through evaporation, concentrate, crystallization and drying, obtain purity 98.2% manganese sulfate product, the Mn yield is greater than 93%.
Embodiment 4
Manganese ore is crushed to 400 orders (forming as shown in table 2), with the water modulation ore pulp of 4 times of manganese ore quality; Add 0.3 times of concentration of manganese ore quality in the ore pulp and be the waste molasses (forming as shown in table 1) of 0.8 times of 98% sulfuric acid and manganese ore quality, stirring reaction obtained reacting leach liquor in 0.3 hour under 95 ℃ of temperature.It is 5.6 that the reaction leach liquor is neutralized to the pH value with Wingdale, and 2.5% concentration in 75 ℃ of following adding pyrolusite quality of temperature is the 0.5mo1/L ammonium sulfide solution then, makes Cu
2+, Ni
2+, Zn
2+, Co
2+Remove etc. heavy metal ion generation sulfide precipitation, left standstill 24 hours, filter.In filtrate, add liquor C a
2+, Mg
2+2.2 times of concentration of ion total mole number are the 1mol/L ammonium fluoride solution, make Ca
2+, Mg
2+Ion generates CaF
2, MgF
2Precipitation is removed, and filters to obtain the purified manganese sulfate solution.The purified manganese sulfate solution through evaporation, concentrate, crystallization and drying, obtain purity 98.5% manganese sulfate product, the Mn yield is greater than 93%.
Claims (4)
1, a kind of production method of manganous sulfate is characterized in that making reductive agent with waste molasses, prepares manganous sulfate with the sulfuric acid to leach manganese ore.
2, method according to claim 1, it is characterized in that waste molasses is the by product after sugarcane or the beet sugar manufacture, invert sugar contents such as its sucrose content is 25～35%, fructose and glucose are 15～25%, colloidal content is 9%～11%, and the organic reducing substances and the ash that contain other grade.
3, method according to claim 1 is characterized in that manganese ore comprises that pyrolusite, psilomelane, ocean tuberculosis manganese ore etc. contain MnO
2Manganese ore, its MnO
2Content greater than 20%.
4, method according to claim 1, its preparation manganous sulfate Step By Condition is as follows:
(1) manganese ore is crushed to 40～400 orders, with 2～10 times of water modulation ore pulps of manganese ore quality;
(2) adding 0.3～0.9 times of concentration of manganese ore quality in the ore pulp is 93～98% sulfuric acid and 0.1～0.8 times waste molasses of manganese ore quality, and stirring reaction obtained reacting leach liquor in 0.3～5 hour under 40～100 ℃ of temperature;
(3) to be neutralized to the pH value with Wingdale be 5.5～6.0 to the reaction leach liquor, and 1%～3% concentration in 50～80 ℃ of following adding pyrolusite quality of temperature is the 0.5mol/L ammonium sulfide solution then, makes Cu
2+, Ni
2+, Zn
2+, Co
2+Remove etc. heavy metal ion generation sulfide precipitation, left standstill 12～24 hours, filter.
(4) in filtrate, add liquor C a
2+, Mg
2+2～2.4 times of concentration of ion total mole number are the 1mol/L ammonium fluoride solution, make Ca
2+, Mg
2+Ion generates CaF
2, MgF
2Precipitation is removed, and filters to obtain the purified manganese sulfate solution.
(5) the purified manganese sulfate solution through evaporation, concentrate, crystallization and drying, obtain purity greater than 98% manganese sulfate product.
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| CN105110300B (en) * | 2015-07-24 | 2017-07-07 | 长沙矿冶研究院有限责任公司 | The method that a kind of compound manganese ore of Containing Sulfur manganese extracts manganese and sulphur |
| CN105002521A (en) * | 2015-08-07 | 2015-10-28 | 长沙矿冶研究院有限责任公司 | Method for removing magnesium impurities in electrolytic manganese system through fluorine-bearing minerals |
| CN105481019A (en) * | 2015-12-18 | 2016-04-13 | 长沙矿冶研究院有限责任公司 | Method for removing alkaline-earth metal and heavy metal impurities in manganese sulfate solution |
| WO2017162037A1 (en) * | 2016-03-25 | 2017-09-28 | 邹传军 | Method for removing calcium and magnesium ions from sugar cane molasses |
| CN108910958A (en) * | 2018-07-17 | 2018-11-30 | 重庆上甲电子股份有限公司 | A method of manganese sulfate is produced using aniline reduction electrolytic manganese anode mud |
| CN114162872A (en) * | 2021-12-31 | 2022-03-11 | 湖南烯富环保科技有限公司 | Method for preparing battery-grade manganese sulfate from manganese oxide ore |
| WO2024052760A1 (en) * | 2022-09-06 | 2024-03-14 | Manganese Metal Company (Pty) Ltd | A process for producing manganese sulphate monohydrate |
| CN115724470A (en) * | 2022-09-26 | 2023-03-03 | 广西科技师范学院 | Method for purifying manganese sulfate solution |
| CN115724470B (en) * | 2022-09-26 | 2024-05-07 | 广西科技师范学院 | Purification method of manganese sulfate solution |
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