• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The iron content of iron-, silicon- and aluminium-containing raw materials e.g. bauxites, clay minerals, colliery rocks, and red minds, is reduced by passing an aqueous hydrochloric acid solution the concentration of which exceeds 100 g./l, through one or more beds of the unground but preferably prebroken and sized raw material, at a temperature below 90 DEG C, preferably at room temperature, optionally in the presence of a flocculating agent. The ferric chloride produced is separated and subjected to pyrolytic decomposition to produce ferric oxide. The bed residue of reduced iron content can be utilized in the Bayer process for producing alum earth, as a starting substance of ceramic industry or, after treatment with sulfuric acid, dissolution in hydrochloric acid or water, elimination of silica, and pyrolytic decomposition of the aluminium sulfate obtained, as an alumina concentrate.
    公开号:SU1426449A3
    申请号:SU813328600
    申请日:1981-08-25
    公开日:1988-09-23
    发明作者:Цегледи Бела；Чевари Михаль；Эрдельи Миклош；Илли Йожеф；Штокер Лайош；Секе Аттила；Сабо Каталин；Ридерауер Силард；Юрмешши Миклош；Тереньи Дьюла；Чургай Иштван
    申请人:Татабаньаи Сенбаньак (Инопредприятие)；Мечеки Эрцбаньасати Валлалат (Инопредприятие)；
    IPC主号:
    专利说明:

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    The invention relates to aluminum hydroxide and can be used in the processing of high-silicon iron-containing bauxite into compounds of aluminum and iron.
    The purpose of inventing is to simplify and cheapen the process.
    Example. 7 kg of bauxite of the following composition,%: attendant moisture 18.0, alumina 53.3; iron oxide (ill) 23.0; silica 6.6i titanium dioxide 2.5, calcium oxide 1, IJ oxide of magic 0.5 substance lost during calcination 12.9, other substances 0.1, crushed into pieces less than 20 mm in size and mixed with 2 l of solution containing 300 g / l of hydrochloric acid and 7 g of Sedosan used as a coagulating agent. After volatilization of carbon dioxide formed during the decomposition of carbonates, the suspension is placed in a column 54 cm long and 6.7 cm in diameter. At the bottom of the column there is a layer of siliceous pebbles 10 cm thick as drainage. Then the column through the silicon wood is filled from bottom to top with the introduction of an i2.3 l solution of the indicated composition. The column is held in this state for two days. During this time, a significant part of the iron contained in bauxite goes into solution, and the content of hydrochloric acid in the solution decreases.
    The resulting solution of ferric chloride is displaced from the column by feeding 2.3 liters of hydrochloric acid into the column at a rate of 0.2 cm / h. The resulting solution, containing approximately 100 g / l of ferric chloride, is saturated with gaseous hydrogen chloride and brought into contact in the second column with fresh bauxite.
    Fresh hydrochloric acid is passed through the first column and the soaking process, dissolving, is repeated until bauxite removes 90% of the iron contained in it and the concentration of the effluent solution is above 140 g / l of curd iron. This chloride solution is desired to be calcium free by the addition of 135 g of concentrated sulfuric acid, and 220 g of hypo
    five
    0
    five
    0
    five
    0
    sa The calcium chloride free solution is directly injected into the pyrolyzer. In the pyrolyzer recuperator, the ferric chloride solution is evaporated with the help of countercurrent gaseous hydrogen chloride and combustion products whose temperature is of the order. In this case, the gas is cooled. until about. A concentrated solution of ferric chloride is injected into the pyrolyzer using a spray head, which is heated with 4000 kcal heat input per 1 kg of iron oxide. Ferric oxide (ill) containing less than 0.1% chloride is produced from ferric chloride decomposing during heating. The column is washed with 7 liters of water. The resulting solution is used in a pyrolyzer absorber as an absorbent of hydrogen chloride.
    Example 2. Bauxite of the same quality as in example I, is crushed into pieces, less than 20 mm in size, and on a double vibrating sieve. classified into three different fractions by particle size. The dust fraction separated from the material containing 13% of the accompanying moisture is approximately 25%. This fraction is not processed. The 75% of the material remaining on the sieve is 40% of 5-20 particles. mm and 60% of the particle size of 1-5 mm. These two fractions are placed in a rubber-lined column with a height of 2.8 m and a diameter of 0.7 m, having a useful volume of 1 m.
    moreover, in layers of 20–30 cm thick, both fractions alternate with each other, and a total of 1.6 tons of bauxite is loaded into the column. At the bottom of the column there is a 5 layer of gravel with a thickness of l5. see. Similarly prepare the second column. In hydrochloric acid with a concentration of 300 g / l, it is dissolved in the calculation of 1 m - 300 g of Praestol 2900, used as a coagulating agent. This solution is fed to the bottom of the first column and is passed from bottom to top at a rate of 5 cm / h until the column is filled. About 400 liters of hydrochloric acid is needed to fill the column. After the column is filled, pactator is fed into the column from the bottom at a rate of 0.5 cm / h. Out of the head
    0
    five
    In the first column, the solution is completely transparent. This solution is taken in fractions of 60 l each and pumped upwards through the second column.
    The first fractions, along with 20-30 g / l of ferric chloride, contain mainly calcium chloride and magnesium chloride and simultaneously displace most of the accompanying moisture. The first 200 l of solution that is
    from the head of the second column, they practically do not contain iron, but contain mainly calcium chloride and magnesium chloride. In each subsequent 300 l, the iron content is constant, the final concentration. ferric chloride is 130 g / l, while the content of calcium chloride and magnesium chloride is reduced to 0.3 g / l, and that of chloride is reduced to about 2 g / l. The content of free hydrochloric acid reaches 150 g / l. With further extraction in 400 liter fractions, the concentration of ferric chloride is reduced, and the concentration of free hydrochloric acid rises. After 1.6 m of hydrochloric acid is passed through the column and the indicated fractions are taken away, the column is likewise washed up and down with water in which 200 g of Praestol 2900 coagulating agent, previously obtained, is dissolved from the chlorine solution. in the manner described in Example 1, is adsorbed in the purity grade used as absorbing fluid in the absorber.
    Example 3. A total of 4 columns (height, 6 m with an inner diameter of 6.7 cm) are filled with bauxite in accordance with Example 2. The lower 10 cm of the columns contain as a drainage layers of gravel with a particle size of 2-5 mm. On this layer of gravel as described in Example 2, layers consisting of particles of different sizes are placed alternately with each other, and approximately 10 cm of the coarse fraction alternate and 15 cm more
    small fraction. Each column contains; g-compositions (see table)
    lives about 7 kg of bauxite. The columns are placed in a row. The T: F ratio, which is established in a four-step system, together with the dead one.
    The solution that comes out to the most expediently is that the two fractions are 1.5 liter either in lime (pH 7) or
    the volume and volume occupied by the drainage is 1: 0.5.
    In the first column with speed
    53 cm / day is fed from below upwards with hydrochloric acid with a concentration of 350 g / l. In one liter of hydrochloric acid, 14 g of Praestol 2935 is contained. The solution leaving the head of the column is directed successively to the second, third and fourth columns. The liquid leaving the head of the fourth column contains almost no acid, and part of the ferric chloride produced by dissolving is hydrolyzed. 7 liters of solution are taken from the fourth column and column 5 is put into operation with its help. At the same time
    The first column, which contains bauxite, is practically not contaminated with iron, and is washed with water, while concentrated hydrochloric acid is fed to column 2.
    Disconnect the column 1 with 7 liters of water until the chlorides are completely removed (the speed of the washing liquid is the same as when it is dissolved with acid). The washing liquid is fractionated to obtain fractions; 1 l with a concentration of 350 g / l, 1 l with 200 g / l, about 5 l with an acid concentration of 50 g / l. The first fraction is used for acid dissolution. The second fraction, after being consolidated with gaseous hydrogen chloride, is used for the same purpose. The third fraction is used to absorb hydrogen chloride. This process is most advisable by connecting other columns and disconnecting the first column until the connection of approximately eighth column is established. An equilibrium state characterized by the following indicators: - from the first column to which 350 g saline acid is supplied a solution of the following composition: hydrochloric acid of about 320 g / l, iron content (ill) 30 g / l, calcium and magnesium content less than 0.2 g / l. The fractions leaving the remaining columns also have equilibrium compositions (see table)
    The solution coming out from column 4 is most advisable to be divided into two fractions of 1.5 liters or neutralized with lime (pH 7) and then sent.
    To save on the scrap heaps, or to save from the co-i-savings, in order to obtain iron oxide (ill), gypsum and magnesium sulphate. In the latter case, the solution is mixed with 165 g of calcium carbonate, forming the iron hydroxide, which is filtered off, washed and introduced into the second fraction, comprising 5.5 liters. After evaporation of the filtrate, approximately 350 g of concentrated sulfuric acid is added, the gypsum formed is filtered off, and the filtrate is evaporated to obtain a crystalline magnesium sulphate
    SRI.
    A fraction of 5.5 liters is disintegrated in the pyrolyzer in the usual way, and hydrochloric acid and jelly oxide are crushed.

    behind. Hydrochloric acid, semi-finished in the re-raw material of 1-20 mm in size, the result of absorption of hydrogen chloride, is returned to the process. Iron oxide can be used in metalworking as a material with a purity of about 92%. After switching off-25 duct, by concentrating the solution of the first column and washing the ferric iron and by pyrolyte continuously from bottom to top — with a speed of 0.2–10 cm / h at a ratio of T: W 1: 0.3–1.0 and 20– 90 0 with the separation of solid aluminum-containing progeny obtained bauxite can be 1 | Used in the Bayer process or to obtain refractory materials. Iron-depleted bauxite has the following composition,%: a substance that is lost during prog-ing 14.67; alumina / 69.54, silicon dioxide 7.92;
    sodium oxide -1.23; iron oxide (III.) 1.73; dioxide .2, 40; cal-gg oxide qi 1.41 and potassium oxide 0.45. After l: rocalisation at 1-600 С material has
    thirty
    Components
    Column indicators
    2 i 3
    the following composition,%: alumina 81,54; silica 9.28; iron oxide (ill) 2.02; titanium dioxide 2.81; calcium oxide 1.65; sodium oxide 1.44 and potassium oxide 0.52.
    权利要求:
    Claims (3)
    [1]
    Invention Formula
    I. Method of processing high-quality; iron-containing bauxites by treating the feedstock with concentrated hydrochloric acid, followed by processing the resulting solution, characterized in that, in order to simplify and reduce the cost of the process, the treatment is carried out by passing hydrochloric acid through a fixed bed of the charge, concentrating the ferric chloride solution and pyrolitically continuously upward with a speed of 0.2-10 cm / h with respect to T: W 1: 0.3-1.0 and 20-90 0 with the separation of solid aluminum-containing pro
    its decomposition to iron oxides.
    [2]
    2. A method according to claim 1, about tl and h aa yu and so that hydrochloric acid is used with coagulant dissolved in it at the rate of 100-500 g / t of bauxite.
    [3]
    3. Method according to p, y u u and u s there.
    1, about tl and h - what is used
    hydrochloric acid in a mixture of chlorine gas.
    4 (fractions 1 (1.5 l) 2 (5.5 l)
    类似技术:
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    同族专利:
    公开号 | 公开日
    YU194181A|1983-09-30|
    FR2489369B1|1984-01-13|
    GB2083450A|1982-03-24|
    AU7449581A|1982-03-04|
    HU184318B|1984-08-28|
    DE3133710A1|1982-04-22|
    YU41791B|1987-12-31|
    CA1173255A|1984-08-28|
    GR75321B|1984-07-13|
    AT377241B|1985-02-25|
    ATA369781A|1984-07-15|
    AU542120B2|1985-02-07|
    GB2083450B|1984-06-27|
    US4530819A|1985-07-23|
    FR2489369A1|1982-03-05|
    引用文献:
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    US2376696A|1942-06-10|1945-05-22|Chemical Foundation Inc|Production of alumina|
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    US3079228A|1960-01-12|1963-02-26|American Cyanamid Co|Production of aluminum sulfate|
    GB982098A|1961-07-10|1965-02-03|Anaconda Co|Improvements in production of alumina|
    US3529931A|1968-07-12|1970-09-22|Nat Lead Co|Regenerating hci from iron chloride solutions|
    JPS5428825B2|1973-06-11|1979-09-19|
    US4118459A|1973-08-01|1978-10-03|Dynamit Nobel Aktiengesellschaft|Chemically removing iron from grits|
    US3959438A|1974-03-21|1976-05-25|Georg Messner|Method for the fabrication of pure alumina from Al2 O3 and silica containing raw materials by leaching with hydrochloric acid|
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    DE2803483C2|1978-01-27|1982-08-05|Standard-Messo Duisburg, Gesellschaft für Chemietechnik mbH & Co, 4100 Duisburg|Process for producing pure Al? 2? O? 3? from aluminum ores|
    DD147185A3|1978-04-24|1981-03-25|Siegfried Ziegenbalg|METHOD FOR PRODUCING PURE ALUMINUM OXIDE|
    US4239735A|1979-09-06|1980-12-16|The United States Of America, As Represented By The Secretary Of The Interior|Removal of impurites from clay|
    US4366129A|1981-04-08|1982-12-28|Tatabanyai Szenbanyak|Process for producing alumina and ferric oxide from aluminium carriers with high iron and silicon content|BE1004975A3|1991-06-06|1993-03-09|Solvay|Method and installation for making aqueous solutions of ferric chloride.|
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    JP2014526431A|2011-09-16|2014-10-06|オーバイトアルミナインコーポレイテッド|Preparation process for alumina and various other products|
    CN102559979B|2012-01-05|2013-12-11|济南钢铁集团耐火材料有限责任公司|Process method for producing reduced iron from red mud|
    US9181603B2|2012-03-29|2015-11-10|Orbite Technologies Inc.|Processes for treating fly ashes|
    US9353425B2|2012-09-26|2016-05-31|Orbite Technologies Inc.|Processes for preparing alumina and magnesium chloride by HCl leaching of various materials|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    HU802109A|HU184318B|1980-08-26|1980-08-26|Process for reducing iron content of raw materialsprocess for decreasing the iron content of raw mat containing iron, silicon and aluminium, as well aerials conta ining iron, silicon and aluminium ands for producing in the given case aluminium oxide for preparing iron oxide further in a given case aluminium oxide concentrate concentrate|
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