Zirconium waste chemical treatment method
A technology for chemical treatment and zirconium waste, applied in the direction of improving process efficiency, can solve the problems of unclear dissolution, poor solubility, turbidity, etc., and achieve recovery of losses and environmental pollution problems, simple process steps, and wide operating windows. Effect
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Embodiment 1
[0017] see figure 1 , in the embodiment of the present invention, a kind of chemical treatment method of zirconium waste comprises the following steps:
[0018] Step 1: Add zirconium waste with a normal iron content of no more than 40ppm of ferric iron, pure water, and concentrated sulfuric acid to the reactor at a mass ratio of 1:1.5:2, and heat up to 80°C under stirring. The zirconium waste completely dissolved;
[0019] Step 2: While stirring, use water to cool the reactor to quickly lower the temperature of the reactor to 30°C, and then filter once with a 3927-type filter cloth to prevent filter-through during the filtration process. The 3927-type filter cloth is the 3927-type (5- 6L / s) specifications or can be replaced with more dense filter cloth, security filter, microporous membrane and other precision filtration facilities;
[0020] Step 3: pump the filtrate into the reaction kettle, add 600L of concentrated sulfuric acid according to the mass volume ratio of zircon...
Embodiment 2
[0023] see figure 1 , in the embodiment of the present invention, a kind of chemical treatment method of zirconium waste comprises the following steps:
[0024] Step 1: Add zirconium orthosulfate with a higher iron content than 40ppm to pure water and concentrated sulfuric acid in a mass ratio of 1:2:2.5 to 5m 3 Reactor, and heated up to 60°C under stirring conditions, the zirconium waste was completely dissolved;
[0025] Step 2: While stirring, use water to cool the reactor to quickly lower the temperature of the reactor to 40°C, and then use a security filter to filter twice to prevent filter-through during the filtration process, or use 3927 type (5-6L / s) Precise filtration facilities such as standard filter cloth, denser filter cloth, and microporous filter membrane;
[0026] Step 3: Pump the filtrate into the reaction kettle, add zirconium orthosulfate and concentrated sulfuric acid to 400L of concentrated sulfuric acid according to the mass volume ratio of 1:400, and ...
Embodiment 3
[0029] Dissolution activity test of zirconium orthosulfate: Weigh 50g of zirconium orthosulfate and add 50ml of pure water, put it into a 25-degree constant temperature water bath and turn on magnetic stirring. If the zirconium orthosulfate dissolves and becomes clear within 30 minutes, it is qualified.
[0030] The zirconium orthosulfate solubility and impurity iron content before and after this method process are shown in the table below:
[0031] Table 1 Solubility and Fe of zirconium waste and zirconium orthosulfate before and after treatment 3+ content
[0032]
[0033] Qualified standard for zirconium orthosulfate: 1. Water-soluble and clear. 2. Fe 3+ ≤40ppm.
[0034] As can be seen from Table 1, the zirconium orthosulfate produced by zirconium waste after the treatment of the present invention can effectively reduce the impurity Fe 3+ The content is reduced to less than 20ppm, and the produced zirconium orthosulfate can be dissolved and clear in water, reaching t...
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