Deep impurity removal method for decalcification refining liquid in "one-step acid dissolution" process of fly ash
A technology of deep impurity removal and refined liquid, which is applied in the field of coal chemical industry, can solve the problems of high cost and cumbersome recycling process, and achieve the effect of low cost, simple process and good quality
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0044] Table 1 Composition of decalcification refining liquid in fly ash "one-step acid solution" process
[0045] composition Al P Si Ca Ga Fe Content (mg / L) 53630 172.9 25.12 52.51 0.2473 1.120
[0046] Take 200mL of the decalcification refined solution obtained in the alumina production process of fly ash "one-step acid dissolution method" into a beaker, the composition and content of which are shown in Table 1 (expressed in elements), and the measured pH value of the solution is about 1.0 . Heat the decalcified refined solution to 55°C and keep it warm, add 0.1621g of zirconium oxychloride, and set the magnetic stirring rate at 100r / min. After reacting for 30min, filter with suction, and take the filtrate for analysis and detection.
[0047] Measured by inductively coupled plasma optical emission spectrometer (ICP-OES), the removal rate of silicon and phosphorus was 80.2% and 87.7% after the above-mentioned decalcification refining solut...
Embodiment 2
[0052] Take 200mL of the decalcified refined solution of Example 1 into a beaker, heat to 45°C and keep it warm, add 0.3224g of zirconium oxychloride, and magnetically stir at 200r / min, react for 60min, suction filter, and take the filtrate for analysis and detection.
[0053] As determined by ICP-OES, the removal rate of silicon and phosphorus was 98.9% and 98.9% after adding chemicals to the above-mentioned calcium-removing refined liquid, and the concentration of other ions basically did not change. The test results are shown in Table 3. Moreover, the measured pH value of the solution is still 1.0 and has not changed, and the residual amount of zirconium in the solution is less than 10 mg / L.
[0054] The composition of the calcium-removing refined solution after adding medicament to remove impurities in table 3
[0055] composition Al P Si Ca Ga Fe Content (mg / L) 53626 1.950 4.496 52.53 0.2428 0.000
Embodiment 3
[0057] The decalcified refined solution in this example comes from a 4,000-ton / year alumina pilot plant, and its composition is shown in Table 4.
[0058] Table 4 Composition of decalcification refining liquid in 4000t / a alumina pilot plant
[0059] composition Al P Si Ca Fe Content (mg / L) 48000～60000 100～300 10～80 0～60 0～10
[0060] The technological process of this embodiment is as figure 2 shown, including:
[0061] (1) Impurity removal reaction tank
[0062] The impurity removal reaction tank is used to add zirconium-containing reagents to the decalcification refining solution, and carry out deep impurity removal reaction in it.
[0063] Mix the refined decalcification solution (solution temperature at 45-55°C) of the 4,000-ton / year alumina pilot plant with the prepared zirconium oxychloride solution (80% by mass concentration of the agent) in the pipeline, and then mix The liquid enters the impurity removal reaction tank, wherein the d...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More