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A kind of technology that utilizes fly ash wet method to prepare natron
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A technology of fly ash and sodium silicate, applied in the direction of alkali metal silicate, silicate, etc., can solve the problems of biological hazards, air pollution, dust generation, etc., to reduce the strength, enhance the contact effect, and increase the heating rate Effect
Active Publication Date: 2020-11-17
宜兴市建东环保材料有限公司
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If a large amount of fly ash is not treated, it will generate dust and pollute the atmosphere; if it is discharged into the water system, it will cause river silting, and the toxic chemicals in it will also cause harm to humans and organisms
Although SiO in fly ash has been utilized in existing methods 2 Components are extracted to prepare raw materials for natron, but the recovery rate of silicon is mostly about 80%, and the preparation effect still needs to be further improved
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Embodiment 1
[0022] A kind of technology that utilizes fly ash wet method to prepare natron, comprises the steps:
[0023] (1) Fly ash ball milling treatment:
[0024] Put the fly ash into the ball mill for ball milling, control the ball milling time to 50 minutes, control the particle size after ball milling to 350~380 mesh, take it out for later use;
[0025] (2) Fly ash roasting treatment:
[0026] Mix the fly ash and ammonium sulfate treated in step (1) according to the mass ratio of 3.6:1, and then put them into the roaster for treatment. Firstly, the roaster is heated to 250°C at a speed of 28°C / min, and kept warm. After roasting for 5 minutes, raise the temperature of the roasting furnace to 400 °C at a rate of 37 °C / min. At this stage, increase the pressure in the roasting furnace to 0.6 MPa at the same time, and then heat-preserve and pressurize for 8 minutes to obtain a roasted mixture for use ;
[0027] (3) Acid leaching treatment of roasted mixture:
[0028] Immerse the cal...
Embodiment 2
[0035] A kind of technology that utilizes fly ash wet method to prepare natron, comprises the steps:
[0036] (1) Fly ash ball milling treatment:
[0037] Put the fly ash into the ball mill for ball milling, control the time of ball milling to 60min, control the size of the particle size after ball milling to be 380~400 mesh, take it out for later use;
[0038] (2) Fly ash roasting treatment:
[0039] Mix the fly ash and ammonium sulfate treated in step (1) according to the mass ratio of 3.8:1, and then put them into a roaster for treatment. First, heat the roaster to 270 °C at a speed of 32 °C / min, and keep it warm. After roasting for 8 minutes, heat the roasting furnace to 420 °C at a rate of 41 °C / min. During this stage, increase the pressure in the roasting furnace to 0.7 MPa at the same time, and then heat-preserve and pressure-preserve roasting for 10 minutes to obtain a roasted mixture for later use. ;
[0040] (3) Acid leaching treatment of roasted mixture:
[0041...
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Abstract
The invention discloses a process for preparing sodium silicate by using a pulverized fuel ash wet method, belonging to industrial production technology of the sodium silicate. The process comprises the following steps: (1) ball-milling treatment of pulverized fuel ash, (2) roasting treatment of the pulverized fuel ash, (3) acid leaching treatment of roasting mixture, (4) calcination treatment of a mixed material, and (5) preparation of the sodium silicate. According to the process, the reuse of the pulverized fuel ash is realized very well under the comprehensive cooperative action of various steps, meanwhile, the recovery utilization rate of silicon is improved to 95% or so and increased by 11% or more compared with a current method, the use value and economic benefit of the pulverized fuel ash are obviously promoted, and a more excellent process is provided for the preparation of current sodium silicate, so that the process has great promotional value.
Description
technical field [0001] The invention belongs to the industrialized production technology of natron, in particular to a process for preparing natron by using fly ash wet method. Background technique [0002] Sodium sodium has a wide range of uses, covering almost all sectors of the national economy. It is used in the chemical system to manufacture silica gel, white carbon black, zeolite molecular sieve, sodium metasilicate silica sol, layer silicon and instant powdery sodium silicate, potassium silicate Various silicate products such as sodium are the basic raw materials of silicon compounds; in light industry, they are indispensable raw materials for detergents such as washing powder and soap, and are also water quality lightening agents and builders; used in textile industry Auxiliary dyeing, bleaching and sizing; widely used in casting, grinding wheel manufacturing and metal preservatives in the machinery industry; used in the manufacture of quick-drying cement, acid-resis...
Claims
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