CN103193517B - Utilize the method that potash feldspar produces potash fertilizer coproduction special cement - Google Patents
Utilize the method that potash feldspar produces potash fertilizer coproduction special cement Download PDFInfo
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- CN103193517B CN103193517B CN201310153579.0A CN201310153579A CN103193517B CN 103193517 B CN103193517 B CN 103193517B CN 201310153579 A CN201310153579 A CN 201310153579A CN 103193517 B CN103193517 B CN 103193517B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
The invention discloses a kind of method utilizing potash feldspar to produce potash fertilizer coproduction special cement, the method is to utilize potash feldspar first to extract potash fertilizer, again the slag separated is made special cement, described production method includes getting the raw materials ready, crushes, homogenizing, calcining, shrend, finally by after liquid concentration isolated after shrend, dry, pelletize potassium sulphate fertilizer；Enter pulverizing mill by adding proper amount of gypsum and clinker after the slag drying and dewatering separated after shrend, grinding to 180-200 order special cement。This method makes full use of the composition of potash feldspar, the potash fertilizer output ratio produced is high, energy consumption is low, solve and utilize potash feldspar to produce side-product separation industry chain length during potash fertilizer in the past, have high input, difficult industrialization, and tailings cannot process and a difficult problem for contaminated environment, it is suitable for having the medium-sized and small enterprises of potash feldspar mineral resources to produce。
Description
Technical field
The present invention a kind of utilizes potash feldspar to produce potash fertilizer the method utilizing its tailings to produce special cement such as radioprotective cement, white cement, belongs to chemical fertilizer or building materials field。
Background technology
Producing potash fertilizer at present mainly adopts the soluble potassium salt of sedimentation through adopting halogen, remove impurity, concentration, pelletize forms, but owing to the potassium salt distributed pole of its solubility is unbalanced, successively the U.S. is had to a postwar whole world, Canada, Britain, the research boom utilizing insoluble potassic mineral to manufacture potash fertilizer is risen in the states such as Japan, China in last century the fifties also have some research institutions to be engaged in this exploration on the one hand, and successively have some payable achievements, most typically utilize the byproduct in process potash fertilizer of cement baking, but plus modern portland cement, the strict restriction of alkali is substantially had no now the report continuing to produce owing to output ratio is low；
Owing to the amount of whole world consumption potash fertilizer is increasing, adding that soluble potassium salt resource reserve is fewer and feweri, people turn to insoluble potassium salt sight again closely during the last ten years, most typical such as potash feldspar, sericite, leucite etc.。Thereby is achieved numerous methods of decomposing of potassium feldspar and patent。Volatility process, roasting leaching method, wet method etc. can be divided into by isolation；The molten method of salt, acid system, alkaline process, fluoride method can be divided into again by decomposing agents。Wherein leaching method for main flow with calcium containing compound roasting, but it is high no matter to adopt which kind of method to all suffer from specific energy consumption, the low economic benefit of output ratio is not good enough。Such as typical cement joint production flue ash potash method (major product is potassium carbonate), output ratio is only at 1%～3% (, 8%～13%, flood rate is more than 80% for Anhydrite potassium oxide content)。After potash feldspar, limestone sintering with sulfuric acid to leach output ratio up to about 8%, but due to the comprehensive utilization value of slag do not cause very much relatively costly and cannot the marketization。Other are nearly all adopt fluoride progressively to separate, by-product α Al destroying potash feldspar network structure such as low-temperature decomposition method2O3, white carbon, silico-aluminum, polyaluminium sulfate, polymerization ferrous sulfate etc., not only energy consumption is higher; product chain is longer; but also to use fluoride and strong acid and strong base in a large number, safety in production and environmental conservation are very severe problems, therefore wouldn't be suitable for newly entering enterprise implement。
Summary of the invention
In order to overcome, the output ratio utilizing potash feldspar production potash fertilizer in prior art is low, energy consumption is high, the industry chain length when side-product separates, have high input, difficult industrialization, and tailings cannot process and contaminated environment drawback, it is an object of the invention to provide a kind of utilize potash feldspar produce potash fertilizer coproduction special cement method。
For solving its technical problem, the technical solution used in the present invention is: utilizing potash feldspar first to extract potash fertilizer, then the slag separated is made special cement, its production method comprises the steps:
1. get the raw materials ready: get all the following material by weight percentage ready:
Potash feldspar 35～45, limestone 40～50, barite 10～20；
2. broken: first potash feldspar, limestone and barite to be crushed to respectively below 20mm, then is mixed stand-by；
3. homogenizing: the mixing of materials material prepared in step 2 is entered pulverizing mill, goes out after grind materials fineness crosses 200 mesh sieves and enter homogenizing storehouse, obtain raw material stand-by；
4. calcining: kiln calcining sent into by raw material step 3 obtained, and calcining heat controls at 1280 DEG C～1350 DEG C, and calcination time is 2～30 minutes；
5. shrend: shrend will be carried out through the burnt red heat material of step 4, material: water=1:1, its temperature 100～120 DEG C, it is incubated 10 minutes, the machine that is then centrifuged for separates；
6: potash fertilizer processed: by after isolated liquid concentration in step 5, dry, pelletize potassium sulphate fertilizer；
7. controlling the water circulation mud: add the Gypsum Fibrosum of 3-5% after slag drying and dewatering step 5 separated and the clinker of 10%～20% enters pulverizing mill, grinding to 180-200 order special cement, this special cement can be used for s, can substitute radioprotective cement, white cement etc. completely。
Compared with prior art, the present invention has following substantive distinguishing features and significant progressive:
1., owing to there being potash feldspar in raw material, it provides potassium oxide for manufacturing potash fertilizer and provides aluminium oxide and silicon dioxide for manufacturing special cement；Due to the mixing of limestone in raw material, for making aluminium oxide in calcium oxide and potash feldspar, silicon dioxide chemical combination, potash feldspar is made thoroughly to decompose；Again due to the mixing of barite in raw material, it is provided that sulfate ion and the potassium ion chemical combination in potash feldspar generate potassium sulfate。Barium ions can produce good radiation resistance in inorganic coagulation material and improve the whiteness of material simultaneously；Particularly the synergism of barite barium ions and sulfate radical can make firing temperature reduce about 150 DEG C, also expands firing range simultaneously, and energy-saving and cost-reducing more than 20%；
2.Owing to the degree of potash feldspar is 35～45, preferably 42～43, when the content of potash feldspar is more than 45%, potash feldspar cannot be made to decompose completely because there is no the silicon dioxide compound in enough calcium ions and barium ions and potash feldspar, when potash feldspar is less than 35%, too much calcium ion and barium ions are because forming C3S,C2S, silicic acid two barium etc. need to consume more energy, and meanwhile, too low potash feldspar also have impact on the output of potassium sulfate, results in the situation that energy consumption is high and output is few；
3. owing to the degree of limestone is 40～50 be preferably 45～48, when limestone content is more than 50%, CaCO3Decomposition and formed silicate mineral will consume more heat, uncombined f-CaO also can cause stability bad simultaneously, when the content of limestone is less than 40%, the SiO in potash feldspar2Also have part to have neither part nor lot in reaction and cause that potash feldspar does not decompose completely；
4. the degree of barite is 10～20, it is preferable that 16～18, when barite is more than 20%, it does not have enough potassium ions chemical combination with it causes S03Effusion, add the cost of desulfurization or pollute the hidden danger of environment, simultaneously after barite is more than 20%, radioprotective cement can produce after 3 months expansion causes cracking；When barite content is less than 10%, because potassium ion does not have enough sulfate ions chemical combination with it, cause that potassium sulfate quantum of output reduces；
In a word, this method makes full use of the effective ingredient of potash feldspar, the potash fertilizer output ratio produced is high, energy consumption is low, solve and utilize potash feldspar to produce side-product separation industry chain length during potash fertilizer in the past, have high input, difficult industrialization, and tailings cannot process and a difficult problem for contaminated environment, is suitable for having the medium-sized and small enterprises of potash feldspar mineral resources to produce。
Detailed description of the invention
Embodiment 1: utilizing potash feldspar first to extract potash fertilizer, then the slag separated is made special cement, its production method comprises the steps:
1. get the raw materials ready: get all the following material by weight percentage ready: potash feldspar 40, limestone 40, barite 20, total amount 100；
2. broken: first potash feldspar, limestone and barite to be crushed to respectively below 20mm, then is mixed stand-by；
3. homogenizing: the mixing of materials material prepared in step 2 is sent into ball mill, goes out after grind materials fineness crosses 200 mesh sieves and enter homogenizing storehouse, obtain raw material stand-by；
4. calcining: calcining kiln sent into by raw material step 3 obtained, and calcining heat controls at 1280～1350 DEG C, and calcination time is 2～30 minutes；
5. shrend: shrend will be carried out through the burnt red heat material of step 4, material: water=1:1, its temperature 100～120 DEG C, it is incubated 10 minutes, then separates with centrifuge；
6: potash fertilizer processed: by after isolated liquid concentration in step 5, dry, pelletize potassium sulphate fertilizer；
7. controlling the water circulation mud: the slag drying and dewatering that step 5 is separated, then add 1～Gypsum Fibrosum of 3.5% and 10～20% clinker, grinding to 180～200 orders special cement, this special cement can be used for s, widely substitute radioprotective cement, white cement use occasion。
Embodiment 2: utilizing potash feldspar first to extract potash fertilizer, then the slag separated is made special cement, its production method comprises the steps:
1. get the raw materials ready: get all the following material by weight percentage ready:
Potash feldspar 45, limestone 45, barite 10；
2. broken: first potash feldspar, limestone and barite to be crushed to respectively below 20mm, then is mixed stand-by；
3. homogenizing: the mixing of materials material prepared in step 2 is sent into ball mill, goes out after grind materials fineness crosses 200 mesh sieves and enter homogenizing storehouse, obtain raw material stand-by；
4. calcining: the raw material that step 3 obtains enter kiln calcining, and calcining heat controls at 1280～1350 DEG C, and calcination time is 2～30 minutes；
5. shrend: the red heat material after step 4 is calcined is carried out shrend, material: water=1:1, its temperature 100～120 DEG C, it is incubated 10 minutes, then separates with centrifuge；
6: potash fertilizer processed: by after concentrated, dry for liquid isolated in step 5, pelletize potassium sulphate fertilizer；
7. controlling the water circulation mud: slag step 5 separated adds 2～Gypsum Fibrosum of 3.5 and 15～20% clinker, intergrinding to 180～200 orders special cement, this special cement can be used for s, substitutes radioprotective cement, white cement use occasion widely。
Embodiment 3: utilizing potash feldspar first to extract potash fertilizer, then the slag separated is made special cement, its production method comprises the steps:
1. get the raw materials ready: get all the following material by weight percentage ready:
Potash feldspar 35, limestone 50, barite 15；
2. broken: first potash feldspar, limestone and barite to be crushed to respectively below 20mm, then is mixed stand-by；
3. homogenizing: the mixing of materials material prepared in step 2 is sent into ball mill, goes out after grind materials fineness crosses 200 mesh sieves and enter homogenizing storehouse, obtain raw material stand-by；
4. calcining: the raw material that step 3 obtains enter kiln calcining, and calcining heat controls at 1280～1350 DEG C, and calcination time is 2～30 minutes；
5. shrend: the red heat material after step 4 is calcined is carried out shrend, material: water=1:1, its temperature 100～120 DEG C, it is incubated 10 minutes, then separates with centrifuge；
6: potash fertilizer processed: by after concentrated, dry for liquid isolated in step 5, pelletize potassium sulphate fertilizer；
7. controlling the water circulation mud: slag step 5 separated adds 2%～Gypsum Fibrosum of 3.5% and 15%～20% clinker, intergrinding to 180～200 orders special cement, this special cement can be used for s, substitutes radioprotective cement, white cement use occasion widely。
Above are only the three of the present invention specific embodiment, but the design concept of the present invention is not limited to this, all utilize this design that the present invention is carried out unsubstantiality change, belong to invade the behavior of present invention protection。
Claims (1)
1. utilizing the method that potash feldspar produces potash fertilizer coproduction special cement, the method is to utilize potash feldspar first to extract potash fertilizer, then the slag separated is made special cement, it is characterized in that: described production method comprises the steps:
(1). get the raw materials ready: get all the following material by weight percentage ready:
Potash feldspar 40, limestone 40, barite 20；
Or potash feldspar 45, limestone 45, barite 10；
Or potash feldspar 35, limestone 50, barite 15；
(2). broken: first potash feldspar, limestone and barite to be crushed to respectively below 20mm, then is mixed stand-by；
(3). homogenizing: the mixing of materials material prepared in step (2) is entered pulverizing mill, goes out after grind materials fineness crosses 200 mesh sieves and enter homogenizing storehouse, obtain raw material stand-by；
(4). calcining: calcining klining sent into by raw material step (3) obtained, and calcining heat controls at 1280 DEG C～1350 DEG C, and calcination time is 2～30 minutes；
(5). shrend: shrend will be carried out through the burnt red heat material of step (4), material: water=1:1, its temperature 100～120 DEG C, it is incubated 10 minutes, the machine that is then centrifuged for separates；
. potash fertilizer processed and special cement: by isolated liquid concentration in step (5), dry, after pelletize potassium sulphate fertilizer；
After the slag drying and dewatering that step (5) is separated is added 3～5% Gypsum Fibrosum and 10%～20% clinker enter pulverizing mill, grinding to 180～200 orders special cement。
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105314903A (en) * | 2015-06-17 | 2016-02-10 | 洛阳名力科技开发有限公司 | Method for producing cement and cement kiln dust simultaneously through potassium feldspar |
| CN109627055B (en) * | 2019-02-15 | 2021-09-14 | 天津水泥工业设计研究院有限公司 | Additive for widening firing range of potassium-containing mineral fertilizer and potassium-containing mineral fertilizer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040224A (en) * | 1988-08-06 | 1990-03-07 | 山西省应用化学研究所 | The method of high-temperature fusion chromium residue detoxifying system cement potash fertilizer chromium cast iron contained |
| CN1146982A (en) * | 1995-05-04 | 1997-04-09 | 贺觉德 | Process for producing potassium sulfate and its by-product using potassium ore |
| CN1948228A (en) * | 2006-11-02 | 2007-04-18 | 山东科技大学 | Method of producing potassium fertilizer using waste gypsum to decompose potash feldspar |
| CN101544518A (en) * | 2009-05-11 | 2009-09-30 | 贵州西洋肥业有限公司 | Method for producing potassium-calcium fertilizer by using potassium feldspar, limestone and phosphogypsum |
| CN102531428A (en) * | 2012-01-19 | 2012-07-04 | 洛阳水泥工程设计研究院有限公司 | Device and method for co-production of cement and cement kiln dust by using potassium feldspar |
| CN102775082A (en) * | 2012-08-17 | 2012-11-14 | 湖南合磷化工有限公司 | Production method of white cement and sulfuric acid |
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- 2013-04-28 CN CN201310153579.0A patent/CN103193517B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040224A (en) * | 1988-08-06 | 1990-03-07 | 山西省应用化学研究所 | The method of high-temperature fusion chromium residue detoxifying system cement potash fertilizer chromium cast iron contained |
| CN1146982A (en) * | 1995-05-04 | 1997-04-09 | 贺觉德 | Process for producing potassium sulfate and its by-product using potassium ore |
| CN1948228A (en) * | 2006-11-02 | 2007-04-18 | 山东科技大学 | Method of producing potassium fertilizer using waste gypsum to decompose potash feldspar |
| CN101544518A (en) * | 2009-05-11 | 2009-09-30 | 贵州西洋肥业有限公司 | Method for producing potassium-calcium fertilizer by using potassium feldspar, limestone and phosphogypsum |
| CN102531428A (en) * | 2012-01-19 | 2012-07-04 | 洛阳水泥工程设计研究院有限公司 | Device and method for co-production of cement and cement kiln dust by using potassium feldspar |
| CN102775082A (en) * | 2012-08-17 | 2012-11-14 | 湖南合磷化工有限公司 | Production method of white cement and sulfuric acid |
Non-Patent Citations (1)
| Title |
|---|
| 钾长石-CaSO_4-CaCO_3体系的热分解生产复合肥;耿曼等;《化肥工业》;20100430;第37卷(第2期);第29-32页 * |
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