软锰矿制备硫酸锰的工艺原理和技术（Process principle and technology for preparing manganese sulfate from pyrolusite）

软锰矿制备硫酸锰的工艺原理和技术（Process principle and technology for preparing manganese sulfate from pyrolusite） 软锰矿制备硫酸锰的工艺原理和技术(Process principle and technology for preparing manganese sulfate from pyrolusite) This article by small wood good contribution Pdf documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view. Journal of Ming vocational college, three vocational college The out stretched version year period Process principle and technology for preparing manganese sulfate from pyrolusite Zhang Qiwei Department of chemical engineering, Sanming Vocational University In this paper, a reduction roasting, a sulfuric acid leaching of two ores, a one-step leaching of manganese ore from a pyrolusite ore, and a pyrite roasting are introduced , Coal is also produced by wet leaching, ferrous sulfate reduction, leaching of sulfur dioxide from leaching gas, and reduction leaching of Bagasse The principle and technology of manganese have extended the direction of the production of chemical manganese ore resources . Pyrolusite Manganese sulphate principle technology Summary Pyrolusite . Is the production of manganese sulfate, including two valence manganese salt of the main raw materials, about the world , , Manganese sulfate is processed by Pyrolusite . Manganese sulfate is the most important two valence manganese salt .. Manganese salt products are processed by it , Therefore, in recent years, from pyrolusite production , The study of salt process is very active, and the process principle and technology of manganese are very active Process principle and technology Based on the author's own practice and the related literature, the production of sulphuric acid from pyrolusite at home and abroad is described in detail In pyrolusite manganese tetravalent it insoluble in acid and alkali reduction methods must pass , , Revert to It is soluble in sulfur The process and technology for the production of manganese sulfate from acid solutions are , Roasting a sulfuric acid leaching process, the process has been more than half a century of history, is a mature traditional process , . Coal was used as reducing agent and under reductive atmosphere , The chemical reaction occurring in roasting , Admission The process is to sift the coal and pyrolusite and mix them at a certain proportion , One Calcination at C temperature . Baked by roasting Sand after cooling , The ratio of liquid to solid was controlled by leaching of sulphuric acid solution The jade , , The leaching rate is up to Above . The leaching reaction was Practice jade Date electric From the practice In addition, some other gangue minerals are also reacted with sulphuric acid to dissolve into human solutions Mei Yu Ji Jian Ji Lin into the balcony To work suffer Ji Yu Gorge Ji Practice No Ji several Ten Act as one's own way month Long , Yang Bo Practice Removed by value , These side reactions not only consume sulfuric acid, but also bring a large amount of impurities into the leaching solution The purity of manganese sulfate can be obtained by concentrated crystallization The student has certain pollution to the environment , Above . The disadvantages of the process are high energy consumption, high labor intensity, dust and smoke production , . One step leaching of two ores The process of preparing manganese sulfate from Pyrolusite and pyrite in sulphuric acid medium has been tested in China, Guangxi and Yunnan Factory production . , The reaction of the process in the leaching process is complex, and the main reactions are as follows , load Lu two, seven Yoon se Ten Thanks. One Resistance " One Mr Zhu two One Free time intestines Ten continent One One altar Ten Long Be partial to The sun day Cough Fen wood Chang Yan One One Good morning! One One One Ten Practice. Well, a few resistance Practice continent with , Practice. Sparse a few, resistant to sparse, partial resistance Two One Cough One nature One One intestines One One Practice Two , Two One As a result of the electromotive force tests of the above reactions, it is shown that the reaction eventually takes place Yan Ten It is found that pyrite reacts with pyrolusite in an acid medium and is thermodynamically complete continent One , or this Quack outside the vein , Quack Jian Ji The practice of "two" Lidan arrived at Jade With jade A small amount of carbonate and oxide in stone minerals also react with jade to form sulfate solution into human solution , One Practice a few practice Pong quack , The chemical equation for the total reaction is Ten Thanks. , Ten Two Practice Yao free Qiao rabbit Play with Mei Ji two What month , No. a surname , The preparation process of manganese sulfate from two ores by one-step process is that the reaction is not calcined at high temperature, but the mineral powder is grinded and mixed and then directly soaked in sulfuric acid solution The reaction avoids the pollution of dust and smoke, and reduces the labor intensity , . The process flow is shown in Figure , Manganese ore Pyrite Ah sulphuric acid The main factors affecting the leaching process include sulfuric acid dosage, liquid-solid ratio, leaching time and leaching time Out time, temperature, etc. . A Sulfuric acid dosage Combined leaching Neutralization and impurity removal One mother liquor From theoretical analysis, the ratio of reactant consumption is pyrolusite, pyrite, sulfuric acid two , The actual feed ratio is pyrolusite, pyrite, sulfuric acid two , One , That is, the amount of sulfuric acid is slightly larger than the theoretical amount, because gangue minerals are also . A portion of sulfuric acid will be consumed The leaching rate is up to , When the amount of sulfuric acid reaches the theoretical dosage range, manganese , , Solid-liquid separation If the acid is lower than the above . The leaching rate is obviously decreased Residue evaporation concentration east Low only about Pyrite , Manganese sulphate , - Pyrite is a reducing agent in leaching reaction, with less deficiency to make it larger . , completely . chart The increase of added leaching of waste treatment and economic is not appropriate , The source of pyrite varies from one to another, and its reducibility is poor , , Flotation of pyrite due to surface flotation reagents will affect the leaching reaction, the other place too long, because the surface is oxidized by air . Leaching beneficial Therefore, the use of native ore is better, the effect of pyrrhotite is poor and the production should be paid attention to when choosing , , , . Liquid solid ratio Generally speaking, liquid solids ratio is controlled by , One The range can satisfy the requirement of leaching. In production, in order to improve the concentration of leaching solution, liquid solid ratio is often adopted , , . Leaching time One step leaching of the two ore requires the leaching reaction temperature to meet the requirement , Only an hour later, the reaction was observed and the leaching reaction reached , Hours later The reaction has reached equilibrium, so the leaching time is , Hour is appropriate . Leaching temperature Because the leaching reaction rate is slow, it is necessary to ensure that the leaching solution has a higher leaching temperature and that the temperature of the leaching liquid is controlled to the right, so that the leaching rate can be greatly accelerated , , C left . The roasting process of pyrolusite and pyrite requires a large amount of sulfuric acid in the two processes, which is difficult for the production of manganese sulphate in the area where there is no sulphuric acid , , Guangdong, Meixian chemical factory in , A study on the production of manganese sulfate by submerged roasting and leaching of pyrolusite and pyrite . On the basis of small-scale tests, extensive tests were carried out The product quality of the products has reached the standard of export grade one , . The main reaction of mixed roasting of manganese oxide ore and pyrite is The altar of jade , intestines Ten Free time , suffer Horse . Ten The process is manganese oxide and pyrite, which is dried and then scaled Roasting of mixed broken ore fines into a reverberatory furnace , , The clinker is dipped in dilute manganese sulfate solution , Manganese ore powder Pyrite , The filtered slag is washed with clean water, and the washing liquid is used as a concentrated concentrate for leaching the dilute liquid The process flow of manganese sulfate is obtained , . The process requires manganese sulfate for each ton of manganese sulfate produced , ton , contain Roasted apricot with blending ore Leaching Tons of expansion tests show that water is leached to prepare sulfur Sue Filtration, evaporation, separation, drying and crushing of this product today with Acid manganese and manganese oxide technique direct roasting acid leaching process compared with energy saving and low cost without the advantages of sulfuric acid is an effective method to use lean ore resources . , too Coal reduction, manganese dioxide, wet process Manganese dioxide in acid medium and coal reaction can make the tetravalent manganese into two , city The valence manganese enters the human solution, this may see in the following 2.5 reactions , chart ',, Practice That is,}, Households now,,, Syria Flat and smooth No road , " Two One Ten Practice. The leaching reaction of the combined 2.5 reaction is Mei magic , Delta Yin One One The reaction is a thermodynamic equilibrium constant in a near boiling solution , , It shows that the reaction is complete , . The results show that the reaction rate is closely related to the temperature, and the reaction rate is fastest under the condition of near boiling Amount of coal added , . In addition, the rate of reaction also depends on the concentration of the acid , . The specific technological process is that the weight ratio of pyrolusite is... The leaching rate of manganese can reach As early as Above . , , Reaction temperature at . One Pulp concentration between Monthly leaching time is small In addition, lignite is better when coal is selected Ferrous sulfate leaching process It has been reported that manganese sulfate is produced by treating Pyrolusite with acid ferrous sulfate or acid bath . The leaching reaction varies with the acidity of the medium There are three different kinds of products In neutral solution conditions The jade with Ji Yu In the condition of low sulfuric acid solution nothing Yu Yiyu Sigh When the acid solution condition Jade Ji. , . Table tennis In order to produce manganese sulfate into iron hydroxide or basic prevent reaction ,, Ferrous sulfate can make both acidic and neutral solutions , The iron sulfate precipitation covered the surface of the Pyrolusite and hindered the reaction. Therefore, the leaching reaction should be controlled in an acid medium Attention has recently been waste acid production by sulfuric acid method of titanium dioxide produced and unsalable by-products ferrous manganese ore leaching manganese sulfate production , . Thanks , Or electroplating plant waste acid for soft . This can not only reduce the cost of processing waste acid but also expanded the scope of use of copperas is particularly suitable for titanium dioxide plant . , Joint production of manganese sulfate can enable enterprises to achieve greater economic benefits and harm to the environment as a treasure of social benefits The waste acid production of titanium dioxide produced per litre from . , Stand with copperas and pyrolusite were April thermal reaction Value generation Post conditioning , Yu He Yu Table tennis , To fly Because Produced in reaction Ten The amount of iron in the process should not be adjusted by conventional methods , The precipitation method is available, sir Huang Qian, Tiefan remnant In order to enter , Sink and remove most of the sediment , Value generation Precipitation method The purifying leaching solution can be combined with the production of manganese carbonate to remove iron by the by-product of the production of manganese carbonate, so as to make the process more reasonable and perfect , . . Flue gas, reduction, manganese dioxide, wet process The coal smoke contains its reaction with pyrolusite , Two body hair , Its emissions into the atmosphere cause air pollution and cause acid rain Ten . The reducibility of the solution in the solution can be used , Reduced to , The dissolution of ions into aqueous solutions is , Dozens of non Ji a surname The pyrolusite is converted into ore pulp to absorb a few of the gases in the flue gas. The manganese can be leached to produce manganese sulphate, and the gas is removed at the same time , - The city of Austin Cheng Ge Long2 , Environment as the core of the preparation of manganese sulfate technology, has very good environmental and economic benefits , . In use In the process of Leaching Pyrolusite with jade , Solid-liquid ratio of slurry And temperature in , The state value and temperature have great influence on the absorption of Yi , . Tests show that the adoption of Solid-liquid ratio , Value control in , One , The leaching rate of manganese can reach up to about 40 degrees centigrade , Above , . The most important feature of the process is to treat waste waste when the whole world is the rapid industrial development of sulfur dioxide flue gas serious air pollution treatment of this waste gas is the primary environmental problems in modern industrial processing method in the present is relatively mature but their common drawback is not only for people , , Output or output is very little. This process combines waste gas treatment with manganese ore resources development and utilization to create new economic benefits , . Process for reducing pyrolusite by bagasse Bagasse is an organic substance, the main component is cellulose and a small amount of sugar, which is reducible in sulfuric acid medium , , Reduced to . And dissolution of manganese sulfate , . The advantage of this method is that the iron ion is not introduced into the system, and the leaching solution is convenient for removing impurities , , The production of manganese sulphate by this method has a conclusion of popularization , . The Guangxi Nanning regional science and Technology Commission has carried out the experiment and has gained successful experience , . , Manganese sulfate produced by Pyrolusite has many advantages and disadvantages The roasting acid leaching process has a long history and the technological indexes of each process are stable .. . But can High cost, high labor intensity and pollution ,, . Now, it is gradually replaced by one-step leaching process of two mines , One step acid leaching of the two ore can save burning Baking process and saving , The sulfuric acid has the popularization and application value ,