Efficient boron-removing slag former and preparation method thereof and method for removing boron and slagging
A kind of slagging agent and slagging technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, silicon dioxide, etc., can solve the problem of limited resources of high-purity quartz ore, unstable boron removal effect, quality problems, etc. Uneven problems, to achieve the effect of enriching the range of materials
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[0042] Example 1 Preparation of nano silica
[0043] 1. Burning rice husk to produce rice husk ash, the burning temperature is 550℃, and the burning time is 5h;
[0044] 2. Add rice husk ash and 0.6mol / L NaOH solution into a stirred reactor, and heat and stir. The heating temperature is 105°C and the reaction time is 5h. After the reaction is completed, the reaction materials are filtered to obtain a water glass solution. The ratio of the rice husk ash to the NaOH solution is 1kg:15L;
[0045] 3. Add the above-mentioned water glass solution, 1mol / L hydrochloric acid, and 0.1mol / L oxalic acid into the reactor at the same time at a metered feeding rate for heating. The heating temperature is 60℃, and the pH value of the material is determined by sampling regularly. The reaction time is 50min. During the reaction, ensure that the pH value of the solution is 8 to 8.5, and the pH value of the end point of the reaction is 7 to 8;
[0046] 4. Drop 1mol / L hydrochloric acid into the solution ...
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[0050] Example 2
[0051] 1. Burning rice husk to produce rice husk ash, the burning temperature is 600℃, and the burning time is 6h;
[0052] 2. Add rice husk ash and 0.6mol / L NaOH solution into a stirred reactor, and heat and stir. The heating temperature is 110°C and the reaction time is 4.5h. After the reaction is completed, the reaction materials are filtered to obtain a water glass solution , The ratio of the rice husk ash to the NaOH solution is 1kg:18L;
[0053] 3. Add the above-mentioned water glass solution, 1mol / L hydrochloric acid, and 0.1mol / L oxalic acid into the reactor at a metered feed rate at the same time for heating. The heating temperature is 50℃, and the pH value of the material is determined by sampling regularly. The reaction time is 50min. During the reaction, ensure that the pH value of the solution is 8 to 8.5, and the pH value of the end point of the reaction is 7 to 8;
[0054] 4. Drop 1mol / L hydrochloric acid into the solution obtained in step 3 for acid...
Example Embodiment
[0058] Example 3: Preparation of sodium carbonate
[0059] Through the grinding equipment, the sodium carbonate is ground into powder with a particle size of 325-700 mesh, that is, 20-45 microns.
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