CN114314778A - Method for producing water purifying agent and white carbon black by roasting-free and reinforced acid leaching coal gangue - Google Patents
Method for producing water purifying agent and white carbon black by roasting-free and reinforced acid leaching coal gangue Download PDFInfo
- Publication number
- CN114314778A CN114314778A CN202011069067.2A CN202011069067A CN114314778A CN 114314778 A CN114314778 A CN 114314778A CN 202011069067 A CN202011069067 A CN 202011069067A CN 114314778 A CN114314778 A CN 114314778A
- Authority
- CN
- China
- Prior art keywords
- coal gangue
- acid
- acid leaching
- carbon black
- water purifying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
A method for producing a water purifying agent and white carbon black by roasting-free and reinforced acid leaching coal gangue. The method does not carry out roasting activation of raw materials, adopts temperature rise and pressurization to strengthen hydrochloric acid for acid leaching of coal gangue powder, uses acid leaching solution for producing water purifying agent, and uses acid leaching silicon slag for producing white carbon black. The method mainly comprises the steps of preparing slurry, strengthening acid leaching, purifying, polymerizing and drying acid leaching liquid to obtain a solid water purifying agent, washing acid leaching silicon slag by sulfuric acid, carrying out alkali dissolution on the silicon slag, precipitating silicon by dilute acid, separating and drying to obtain the high-purity white carbon black. The method has the advantages of low production cost, high resource utilization rate, high product value and easy realization of large-scale production, and is a reasonable process for utilizing the coal gangue with high value.
Description
Technical Field
The invention belongs to the technical field of inorganic chemical industry, and relates to a method for producing a water purifier and a white carbon black product by roasting-free and reinforced acid leaching coal gangue.
Technical Field
China is a large country for coal production and consumption, and the amount of waste coal gangue in coal mining and processing processes is more than 2 hundred million tons and 50 hundred million tons of coal gangue are accumulated in China every year, so that the coal gangue is one of the industrial solid wastes with the largest discharge amount in China. The waste coal gangue occupies a large amount of land and seriously pollutes the environment. How to treat coal gangue in large scale and utilize the coal gangue with high value is a major problem which troubles relevant regions and relevant enterprises.
The coal gangue mainly comprises kaolinite, quartz and coal, and also contains a small amount of elements such as iron, calcium, magnesium, sulfur, phosphorus and the like and trace rare elements. Among them, kaolinite (Al)2O3·2SiO2·H2O) theoretically contains 42.5% of alumina, 50% of silica and 7.5% of water of crystallization. Therefore, the aluminum element in the coal gangue can be used for producing the aluminum chloride water purifying agent, and the silicon element in the coal gangue can be used for producing the high-purity white carbon black.
The aluminum chloride water purifying agent is an inorganic polymeric flocculant, is a wastewater and drinking water purifying agent widely applied at present, and has the advantages of low production cost, small unit dosage, good flocculation performance, suitability for various water treatment processes and the like compared with other types of water purifying agents. At present, bauxite which is not abundant in domestic reserves is mainly used as a raw material in the production of the aluminum chloride water purifying agent in China, and coal gangue which is abundant in reserves is rarely developed and utilized as a raw material to produce a water purifying agent product.
After the aluminum element in the coal gangue is used for producing the water purifying agent, the residual silicon slag needs to be deeply processed into a silicon-containing product, so that a large amount of solid waste cannot be generated. The precipitated white carbon black is a porous, amorphous and white hydrated silicon dioxide powder product, has the characteristics of chemical inertness, large specific surface area, high temperature resistance, non-combustibility, non-toxicity, electrical insulation and the like, and is widely applied to various fields of national economy such as rubber, food, medicine, coating and the like. The silicon element in the coal gangue is deeply processed into the white carbon black product, so that the resource utilization value is improved, the product is widely applied, and the market prospect is huge.
In recent years, coal gangue is used as a raw material, and a new process for preparing a water purifying agent and white carbon black by a non-roasting and reinforced hydrochloric acid leaching method is explored. Firstly, in order to improve the leaching rate of aluminum element in the coal gangue, roasting activation treatment with high cost and energy consumption is abandoned, and only mechanical crushing and wet ball milling treatment are carried out on the coal gangue. Then, the temperature rise and the pressure are adopted to strengthen the hydrochloric acid leaching of the coal gangue mineral powder, so that the leaching rate of the aluminum element in the coal gangue is improved as much as possible, and the leaching rate of the aluminum element in the coal gangue is larger than 96%. Thus, a good process foundation is laid for preparing the water purifying agent by the acid leaching solution and preparing the high-purity white carbon black by the acid leaching silicon slag. And (3) purifying, polymerizing and drying the acid leaching solution to obtain a solid water purifying agent product, washing acid leaching silicon slag by sulfuric acid, carrying out alkali dissolution on the silicon slag, precipitating silicon by dilute acid, separating, drying and the like to obtain a high-purity white carbon black product. The method has the advantages of low production cost, high resource utilization rate, high product value and easy realization of large-scale production, and is a reasonable process for high-value utilization of the coal gangue.
Disclosure of Invention
The coal gangue is one of the largest industrial solid wastes discharged in China, and large-scale processing and high-value utilization are inevitable choices for solving the problems of long-term accumulation of a large amount of coal gangue, environmental pollution and the like. A process for preparing water purifying agent and white carbon black from the coal gangue through acid leaching with hydrochloric acid without calcining is disclosed. The method does not carry out roasting activation of raw materials, adopts temperature rise and pressurization to strengthen hydrochloric acid for acid leaching of coal gangue powder, uses acid leaching solution for producing water purifying agent, and uses acid leaching silicon slag for producing white carbon black. The method comprises the following steps:
(1) preparing slurry: firstly, the massive coal gangue is mechanically crushed, then wet ball milling is carried out, a coal gangue filter cake is obtained after solid-liquid separation, and the filter cake is mixed with a proper amount of hydrochloric acid to prepare coal gangue-hydrochloric acid slurry. Or mixing hydrochloric acid with a proper amount of mechanically crushed coal gangue powder, and performing wet ball milling to directly obtain coal gangue-hydrochloric acid slurry;
(2) strengthening acid leaching: strengthening acid leaching reaction of the slurry prepared in the step (1) at a specific temperature and pressure, and then carrying out solid-liquid separation to obtain an acid leaching solution and acid leaching silicon slag;
(3) purifying the acid leaching solution: adding a proper amount of precipitator into the acid leaching solution obtained in the step (2) to remove harmful substances in the acid leaching solution;
(4) preparing a water purifying agent: and (4) heating the acid leaching solution purified in the step (3) and a proper amount of polymerization agent for reaction, and drying to obtain a solid water purifying agent product.
(5) Purifying acid leaching silicon slag: washing the acid-leached silicon slag obtained in the step (2) by using a sulfuric acid solution to remove impurity elements in the silicon slag;
(6) preparing white carbon black: and (5) reacting the acid-leaching silicon slag purified in the step (5) with a sodium hydroxide solution, and then carrying out solid-liquid separation. Dilute hydrochloric acid was added dropwise to the filtrate until the solution was acidic and a white precipitate was formed in the solution. Filtering, washing and drying to obtain the white carbon black with the purity of more than 99 percent.
In order to improve the leaching rate of aluminum element in the coal gangue in the hydrochloric acid leaching process, firstly, dry mechanical crushing is carried out on the blocky coal gangue, and wet ball milling is carried out on coal gangue powder after mechanical crushing. And (2) after the wet ball milling in the step (1), the coal gangue powder is less than 45 microns.
The aim of hydrochloric acid pickling is to transfer aluminum element in the coal gangue into an aluminum chloride pickling solution as much as possible, so that the aluminum resource is fully utilized. In order to improve the leaching rate of the aluminum element in the coal gangue as much as possible, the invention adopts the technology of strengthening acid leaching process such as improving the acid leaching reaction temperature, increasing the pressure of the reaction system and the like on the basis of the wet ball milling of the coal gangue raw material.
The reinforced acid leaching in the step (2), wherein the hydrochloric acid is industrial hydrochloric acid, the concentration of the hydrochloric acid is 15-31 wt%, the reaction temperature is 110-.
And (3) before the purifying acid leaching solution is used for preparing the water purifying agent, harmful heavy metal ions in the purifying acid leaching solution are removed, so that the quality of the water purifying agent is not influenced. Adding a proper amount of one of sulfides such as calcium sulfide, sodium sulfide, potassium sulfide and the like into the acid leaching solution as a precipitator to precipitate harmful substances such as lead, mercury, arsenic and the like in the acid leaching solution. Standing, precipitating, and preparing the water purifying agent by using the supernatant.
And (4) adding a proper amount of polymerization agent into the acid leaching solution from which the harmful heavy metal ions are removed, heating and reacting for 1-3 hours at the temperature of 90 +/-5 ℃, and drying to obtain a solid water purifying agent product.
The water purifying agent prepared in the step (4), wherein the polymerizing agent is one or more of alkaline soluble substances such as sodium hydroxide, potassium hydroxide, calcium aluminate and the like.
The hydrochloric acid leaching silicon slag still contains a small amount of aluminum, iron, titanium and other impurity elements which affect the quality and purity of the white carbon black, and the white carbon black is required to be removed by acid pickling more thoroughly in order to obtain a white carbon black product with the purity of more than 99%.
And (5) carrying out acid pickling treatment on the purified acid-leached silicon slag by adopting sulfuric acid, wherein the concentration of the sulfuric acid is 30-70%, the pickling temperature is 110-200 ℃, the pressure is 0.2-1.0MPa, and the pickling time is 1-3 hours.
Detailed description of the preferred embodiments
FIG. 1 is a flow chart of a process for producing water purifying agent and white carbon black by roasting-free and reinforced acid leaching coal gangue.
The method comprises the steps of firstly, mechanically crushing large blocks of coal gangue in a crusher until the particle size of powder is 30-100 meshes, then preparing slurry by using water and coal gangue powder according to the mass ratio of 3:1-4:1, and pumping the slurry into a ball mill for wet ball milling. The gangue powder is less than 45 microns after two-step treatment of mechanical crushing and wet ball milling. And performing solid-liquid separation on the coal gangue slurry subjected to wet ball milling by adopting plate-and-frame filter pressing operation. The filtered water is recycled for preparing wet ball milling slurry, and the coal gangue filter cake is mechanically crushed.
Or preparing slurry from 15-31 wt% hydrochloric acid and gangue powder according to the mass ratio of 3:1-4:1, and performing wet ball milling.
The above operation steps are the pretreatment process of the coal gangue, and the coal gangue powder is obtained through the mechanical crushing, wet ball milling and other treatments. The aim of the coal gangue pretreatment is to improve the activity of coal gangue powder, and the leaching rate of aluminum element can be improved as much as possible in the subsequent hydrochloric acid leaching process.
The invention utilizes industrial hydrochloric acid with the concentration of 15-31 wt% to be mixed with the pretreated coal gangue powder according to the equal molar ratio for preparation, and the acid leaching reaction is strengthened for 1-3 hours under the conditions that the temperature is 110-. The hydrochloric acid fully reacts with aluminum, iron, calcium, magnesium and the like in the coal gangue, and then solid-liquid separation is carried out. The filtrate is acid leaching solution containing aluminum chloride, ferric chloride and other components, and the filter cake is mainly silica and a small amount of aluminum, iron, titanium and the like which are not subjected to acid leaching.
The water purifying agent product is used for treating industrial wastewater or purifying domestic drinking water, and has strict requirements on the content of harmful heavy metal ions in the water purifying agent product. Before the acid leaching solution is used for preparing the water purifying agent, harmful heavy metal ions in the acid leaching solution need to be removed so as not to influence the quality of the water purifying agent.
In the invention, a proper amount of one of sulfides such as calcium sulfide, sodium sulfide, potassium sulfide and the like is added into the acid leaching solution to be used as a precipitator, and harmful substances such as lead, mercury, arsenic and the like in the acid leaching solution are precipitated. Fully reacting, adding a proper amount of organic flocculant, standing, precipitating, and preparing the water purifying agent by using the supernatant.
Adding a proper amount of one or more polymerization agents of alkaline soluble substances such as sodium hydroxide, potassium hydroxide, calcium aluminate and the like into the acid leaching solution without harmful heavy metal ions, and heating and reacting for 1-3 hours at the temperature of 90 +/-5 ℃. And drying the reaction liquid to obtain a solid water purifying agent product.
After acid leaching with hydrochloric acid, a filter cake obtained by solid-liquid separation contains silicon dioxide as a main component, including amorphous silicon dioxide and quartz originally existing in coal gangue raw material ores, and other impurities such as aluminum, iron, titanium and the like in a very small amount.
In order to remove impurities such as aluminum, iron, titanium and the like in the filter cake more thoroughly so as to avoid seriously influencing the purity and quality of the white carbon black product, the filter cake needs to be acid-washed by a sulfuric acid solution. In the sulfuric acid pickling process, the concentration of the sulfuric acid is 30-70%, the pickling temperature is 110-. And (5) after the sulfuric acid pickling is finished, carrying out solid-liquid separation. The filtrate is recycled in the sulfuric acid pickling process, and the filter cake is used for preparing the white carbon black after being washed by water. The water washing liquid contains sulfuric acid component, and is added into the sulfuric acid washing process for utilization.
The filter cake after sulfuric acid pickling and water washing reacts with 30-60% sodium hydroxide solution at 120 deg.c for 1-3 hr to produce sodium silicate solution, which is then filtered. The filter liquor is sodium silicate solution, the main components of the filter cake are carbon and other small and trace substances, and the filter cake can be used as fuel for combustion after being washed by water.
Adding water to dilute the sodium silicate solution, and controlling the concentration of the sodium silicate solution within the range of 50-100 g/L. And slowly dropwise adding dilute hydrochloric acid into the diluent while stirring until the pH value of the solution is 3-5 to generate white precipitate. Filtering, washing and drying the precipitate to obtain the white carbon black product with the purity of more than 99 percent.
In conclusion, the invention has three originality: (1) the roasting and activating treatment of the coal gangue raw material powder is abandoned, and the process cost is greatly reduced, so that the treatment process of the coal gangue solid waste becomes profitable, which is a new breakthrough different from other coal gangue utilization technologies; (2) the invention relates to a method for strengthening hydrochloric acid leaching by heating and pressurizing, which is an important invention content, so that the leaching rate of aluminum element in coal gangue is more than 96 percent, which is a new development of coal gangue utilization technology; (3) in the process provided by the invention, the quartz component in the coal gangue raw material is completely converted into the white carbon black product, which is an important discovery of the new utilization technology of the coal gangue provided by the invention. In the invention, the aluminum element in the coal gangue is used for preparing the water purifying agent product, the silicon element in the coal gangue is used for preparing the high-purity white carbon black product, a small amount of coal components in the finally enriched coal gangue can be used as fuel for combustion, and the main elements in the coal gangue are fully utilized with high value.
[ example 1 ]
In order to accurately analyze the chemical composition of the coal gangue raw material, high-temperature calcination is carried out on the coal gangue mineral powder before XRF analysis. The chemical composition of the calcined coal gangue raw material powder is shown in Table 1 (unit: mass%). The data in table 1 show that the coal gangue used in the experiment contains various chemical components such as quartz, iron, potassium, calcium, magnesium, titanium and the like besides kaolinite, and is a common coal gangue raw material with various impurity types and high impurity content.
TABLE 1 coal gangue chemical composition Table (unit: mass%,%)
10 kg of batch coal gangue fragments are put into a crusher with a high-speed cutting blade, and the crushed coal gangue fragments are powered on and crushed for 5 minutes. The coal gangue block raw material is crushed into coal gangue powder. The coal gangue mineral powder and tap water are mixed and stirred uniformly according to the liquid-solid ratio of 3.5:1 to prepare slurry. And (3) putting a proper amount of slurry into a ball milling tank of a ball mill, adjusting the variable frequency speed regulation to 45Hz, ball milling for 60 minutes, and pouring out the slurry. After a plurality of batches of ball milling operations, about 45 kg of the milled slurry was mixed and subjected to solid-liquid separation in a laboratory filter press. The filter cake was dried at 120 ℃ for 12 hours, then crushed in a crusher for 2 minutes, and packed in a sealed bag for future use.
[ example 2 ]
200 g of the coal gangue powder prepared in the example 1 are weighed, mixed with 600ml of hydrochloric acid with the concentration of 25 percent, stirred evenly, put into two reactors with the volume of 500ml, reacted for 1.5 hours at the temperature of 120 ℃, filtered, washed and dried, and the filtrate is collected. The contents of silicon dioxide, aluminum oxide and ferric oxide in the filter cake are 85.418%, 10.285% and 0.638% respectively by XRF analysis.
[ example 3 ]
200 g of the coal gangue powder prepared in the example 1 are weighed, mixed with 600ml of hydrochloric acid with the concentration of 20 percent, stirred evenly, put into two reactors with the volume of 500ml, reacted for 2.5 hours at 160 ℃, filtered, washed and dried, and the filtrate is collected. The contents of silicon dioxide, aluminum oxide and ferric oxide in the filter cake are 91.173%, 5.010% and 0.318% respectively by XRF analysis.
[ example 4 ]
200 g of the coal gangue powder prepared in the example 1 are weighed, mixed with 600ml of hydrochloric acid with the concentration of 22 percent, stirred evenly, put into two reactors with the volume of 500ml, reacted for 3 hours at 180 ℃, filtered, washed and dried, and the filtrate is collected. The contents of silicon dioxide, aluminum oxide and ferric oxide in the filter cake analyzed by XRF method are 95.357%, 1.329% and 0.092% respectively.
[ example 5 ]
The filter cake of the acid-leached silica residue of hydrochloric acid of example 2 was mixed with 65% of 500ml of sulfuric acid, stirred well, placed in two reactors with a volume of 500ml, reacted at 150 ℃ for 2.5 hours, the filter cake was suction filtered, washed and dried, and the filtrate was collected. The contents of silicon dioxide, aluminum oxide and ferric oxide in the filter cake are 97.794%, 1.027% and 0.018% respectively by XRF analysis.
55 g of solid sodium hydroxide is weighed and dissolved in 140ml of water, and the mixture is stirred uniformly and completely dissolved. And adding 100g of the sulfuric acid-washed silicon slag into the sodium hydroxide solution while stirring until the silicon slag is completely added, and uniformly stirring. Then transferred to two 200ml reactors, reacted at 120 ℃ for 2 hours and filtered with suction to give a filtrate and 8.7g of filter cake (the main component is charcoal).
The filtrate was diluted to 2000ml, heated to 50 ℃ and then 8% diluted hydrochloric acid was slowly added dropwise with stirring. During the dropwise addition of dilute acid, white precipitates appeared in the solution. And continuing to add the solution until the pH value of the solution is 3, and stopping adding the acid. Stirring and curing for 30 minutes, filtering, washing the filter cake, and drying at 150 ℃ for 6 hours to obtain a super-white, super-fine and super-dispersed white carbon black sample with the purity of 99.377 percent and the impurity of Na2O and Al2O30.130% and 0.394% respectively.
[ example 6 ]
100ml of the mixture of the pickle liquors of examples 2, 3 and 4 was taken and placed in a three-necked flask, and 20 g of calcium aluminate powder and 0.2 g of sodium sulfide were added thereto, stirred and filtered. And heating the filtrate to 90 ℃ for polymerization for 120 minutes, and placing the filtrate into a 50 ℃ drying oven for drying to obtain a solid polyaluminum chloride sample with 27% of aluminum oxide by weight and 63% of basicity.
[ example 7 ]
100ml of the mixture of the pickle liquors of examples 2, 3 and 4 was taken and placed in a three-necked flask, and 30 g of calcium aluminate powder and 0.2 g of sodium sulfide were added thereto, stirred and filtered. And heating the filtrate to 90 ℃ for polymerization for 150 minutes, and placing the filtrate into a 50 ℃ drying oven for drying to obtain a solid polyaluminum chloride sample with 29% of aluminum oxide by weight and 68% of basicity.
Claims (5)
1. A method for producing a water purifying agent and white carbon black by roasting-free and reinforced acid leaching coal gangue. The method does not carry out roasting activation of raw materials, adopts temperature rise and pressurization to strengthen hydrochloric acid for acid leaching of coal gangue powder, uses acid leaching solution for producing water purifying agent, and uses acid leaching silicon slag for producing white carbon black. The method is characterized by comprising the following steps:
(1) preparing slurry: firstly, the massive coal gangue is mechanically crushed, then wet ball milling is carried out, a coal gangue filter cake is obtained after solid-liquid separation, and the filter cake is mixed with a proper amount of hydrochloric acid to prepare coal gangue-hydrochloric acid slurry. Or mixing hydrochloric acid with a proper amount of mechanically crushed coal gangue powder, and performing wet ball milling to directly obtain coal gangue-hydrochloric acid slurry;
(2) strengthening acid leaching: strengthening acid leaching reaction of the slurry prepared in the step (1) at a specific temperature and pressure, and then carrying out solid-liquid separation to obtain an acid leaching solution and acid leaching silicon slag;
(3) purifying the acid leaching solution: adding a proper amount of precipitator into the acid leaching solution obtained in the step (2) to remove harmful heavy metal ions in the acid leaching solution;
(4) preparing a water purifying agent: heating the acid leaching solution purified in the step (3) and a proper amount of polymerization agent for reaction, and drying to obtain a solid water purifying agent product;
(5) purifying acid leaching silicon slag: washing the acid-leached silicon slag obtained in the step (2) by using a sulfuric acid solution to remove impurity elements in the silicon slag;
(6) preparing white carbon black: and (5) reacting the acid-leaching silicon slag purified in the step (5) with a sodium hydroxide solution, and then carrying out solid-liquid separation. Dilute hydrochloric acid was added dropwise to the filtrate until the solution was acidic and a white precipitate was formed in the solution. Filtering, washing and drying to obtain the white carbon black with the purity of more than 99 percent.
2. The method for producing the water purifying agent and the white carbon black by using the coal gangue as claimed in claim 1, wherein the coal gangue powder is less than 45 microns after the wet ball milling in the step (1).
3. The method for producing water purifying agent and silica white by using coal gangue as claimed in claim 1, wherein the step (2) is a reinforced acid leaching, wherein the hydrochloric acid is industrial hydrochloric acid, the concentration of the hydrochloric acid is 15-31 wt%, the acid leaching reaction temperature is 110-.
4. The method for producing water purifying agent and white carbon black by using coal gangue as claimed in claim 1, wherein the purifying acid leaching solution in the step (3) is obtained by adding a proper amount of one of calcium sulfide, sodium sulfide, potassium sulfide and other sulfides as a precipitator to precipitate harmful substances such as lead, mercury, arsenic and the like in the acid leaching solution.
5. The method for producing water purifying agent and white carbon black by using coal gangue as claimed in claim 1, wherein the acid-washing silica slag obtained in the step (5) has a sulfuric acid concentration of 30-70%, an acid-washing temperature of 110-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011069067.2A CN114314778A (en) | 2020-09-30 | 2020-09-30 | Method for producing water purifying agent and white carbon black by roasting-free and reinforced acid leaching coal gangue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011069067.2A CN114314778A (en) | 2020-09-30 | 2020-09-30 | Method for producing water purifying agent and white carbon black by roasting-free and reinforced acid leaching coal gangue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114314778A true CN114314778A (en) | 2022-04-12 |
Family
ID=81032175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011069067.2A Pending CN114314778A (en) | 2020-09-30 | 2020-09-30 | Method for producing water purifying agent and white carbon black by roasting-free and reinforced acid leaching coal gangue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114314778A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114892004A (en) * | 2022-04-19 | 2022-08-12 | 浙江特力再生资源股份有限公司 | Comprehensive recycling process of copper-containing silicon slag |
| CN115583655A (en) * | 2022-11-03 | 2023-01-10 | 陕西煤业化工技术研究院有限责任公司 | Method for fractional extraction, utilization and conversion of high-calcium and high-iron gasification furnace slag elements |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87103009A (en) * | 1987-05-06 | 1987-09-30 | 德阳市孝泉化工厂 | The production method of poly aluminum chloride compound |
| CN1736863A (en) * | 2004-08-16 | 2006-02-22 | 张�诚 | Wet method for producing polymerized alumnium choride and high module liquid sodium silicate from coal serial kaolin |
| CN103964482A (en) * | 2014-05-16 | 2014-08-06 | 山西大学 | Method for synergistically utilizing silicon, aluminium and carbon in gangue |
| CN106277006A (en) * | 2016-07-29 | 2017-01-04 | 陕西师范大学 | A kind of method for refined crystalline aluminium chloride deliming |
| CN111170372A (en) * | 2019-09-11 | 2020-05-19 | 沈阳环境科学研究院 | High-added-value comprehensive utilization method of coal gangue |
-
2020
- 2020-09-30 CN CN202011069067.2A patent/CN114314778A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87103009A (en) * | 1987-05-06 | 1987-09-30 | 德阳市孝泉化工厂 | The production method of poly aluminum chloride compound |
| CN1736863A (en) * | 2004-08-16 | 2006-02-22 | 张�诚 | Wet method for producing polymerized alumnium choride and high module liquid sodium silicate from coal serial kaolin |
| CN103964482A (en) * | 2014-05-16 | 2014-08-06 | 山西大学 | Method for synergistically utilizing silicon, aluminium and carbon in gangue |
| CN106277006A (en) * | 2016-07-29 | 2017-01-04 | 陕西师范大学 | A kind of method for refined crystalline aluminium chloride deliming |
| CN111170372A (en) * | 2019-09-11 | 2020-05-19 | 沈阳环境科学研究院 | High-added-value comprehensive utilization method of coal gangue |
Non-Patent Citations (6)
| Title |
|---|
| 刘成龙等: "煤矸石脱铁工艺优化与动力学研究", 《昆明理工大学学报(自然科学版)》 * |
| 张俊才: "煤矸石制取絮凝剂聚合氯化铝的研究", 《煤》 * |
| 李凡修等: "聚合氯化铝制备技术研究现状和进展", 《化学工程师》 * |
| 杨慧芬等: "煅烧煤矸石中铝铁和硅组分的硫酸浸出行为差异研究", 《煤炭工程》 * |
| 赵瑞彤等: "煤矸石酸浸废渣制备白炭黑的工艺研究", 《无机盐工业》 * |
| 邓寅生等: "《煤炭固体废物利用与处置》", 31 August 2008 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114892004A (en) * | 2022-04-19 | 2022-08-12 | 浙江特力再生资源股份有限公司 | Comprehensive recycling process of copper-containing silicon slag |
| CN115583655A (en) * | 2022-11-03 | 2023-01-10 | 陕西煤业化工技术研究院有限责任公司 | Method for fractional extraction, utilization and conversion of high-calcium and high-iron gasification furnace slag elements |
| CN115583655B (en) * | 2022-11-03 | 2024-04-02 | 陕西煤业化工技术研究院有限责任公司 | Method for classifying, extracting, utilizing and converting high-calcium and high-iron gasification slag elements |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103937998B (en) | A kind of method from preparing low silicon Vanadium Pentoxide in FLAKES containing vanadium chrome-silicon solution | |
| CN111072071B (en) | Method for producing polymeric aluminum ferric sulfate water purifying agent and silica gel by using iron tailings | |
| CN109516484B (en) | Method for producing alumina by sintering carbide slurry fly ash and coal gangue | |
| CN101760613B (en) | Method for leaching zinc-containing ores | |
| CN114314778A (en) | Method for producing water purifying agent and white carbon black by roasting-free and reinforced acid leaching coal gangue | |
| WO2018233688A1 (en) | Method for preparing aluminum hydroxide by treating medium- and low-grade bauxite by using one-step alkali heat process of andradite | |
| JP2014519468A (en) | Method for preparing hematite | |
| CN108892146B (en) | Desiliconization method of silicon-aluminum-containing material | |
| WO2017101746A1 (en) | Bauxite desiliconization method | |
| CN100515955C (en) | Method for preparing iron oxide red from red mud | |
| CN101306819B (en) | Process for abstracting white carbon black from fly ash or slag | |
| CN112551658A (en) | High-alumina fly ash defluorination flocculant and preparation method and application thereof | |
| CN100418877C (en) | Ultra-high purity purifying technique for native graphite | |
| CN101838006A (en) | Novel method for separating strontium carbonate waste slag acid leaching slurry | |
| CN103738972A (en) | Method for preparing silicon micropowder by using pulverized fuel ash aluminum extraction residues | |
| CN113562770B (en) | Method for recycling iron and sodium resources in red mud in gradient manner and fully utilizing tailings | |
| CN103303974B (en) | Method for recycling waste silicon slag discharged in production of zirconyl chloride | |
| CN107162029B (en) | Red mud method of comprehensive utilization | |
| CN103332711A (en) | Deep desilicication method of high-alumina fly ash | |
| CN112939168B (en) | Coagulant for printing and dyeing wastewater and preparation method thereof | |
| CN1225320C (en) | Comprehonsive utilization method of asbestos tail ore | |
| CN112279284B (en) | Method for comprehensively utilizing high-sulfur bauxite and Bayer process red mud | |
| CN114804673A (en) | Comprehensive utilization method of red mud | |
| CN108298545A (en) | Utilize the method for sulfuric acid and metal chloride medium de_ironing refinement quartz sand | |
| CN114314621B (en) | Method for producing metallurgical-grade aluminum oxide and white carbon black by roasting-free and reinforced acid leaching coal gangue |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |