Method for preparing high-chromium product by combining micro waves and ultrasonic waves to leach chromite through hydrochloric acid

[0027] Example 1

[0028] Such as figure 1 As shown, the method for preparing high chromium products by leaching chromite with hydrochloric acid combined with microwave and ultrasonic, the specific steps are as follows:

[0029] Step 1. Crush the chromite to a particle size below 200 mesh to obtain chromite powder; the chromite includes the following mass percentage components: Cr 2 O 3 40.82%, SiO 2 5.02%, Al 2 O 3 13.04%, CaO2.4%, MgO10.83%, TFe19.85%, Cr 2 O 3 / FeO1.69;

[0030] Step 2. Add the chromite powder obtained in step 1 to a hydrochloric acid solution with a concentration of 11.6mol / L according to a liquid-to-solid ratio of 2:0.5mL / g. Under the condition of a microwave power of 1500g / W, the temperature is raised to 600℃, and the The power is 100W, the ultrasonic frequency is 20KHz, and the leaching is kept for 60min. After the leaching is completed, it is filtered and dried to obtain the leaching residue;

[0031] Step 3. Crush the leaching residue obtained in step 2

[0033] Example 2

[0034] Such as figure 1 As shown, the method for preparing high chromium products by leaching chromite with hydrochloric acid combined with microwave and ultrasonic, the specific steps are as follows:

[0035] Step 1. Crush the chromite to a particle size below 200 mesh to obtain chromite powder; the chromite includes the following mass percentage components: Cr 2 O 3 40.82%, SiO 2 5.02%, Al 2 O 3 13.04%, CaO2.4%, MgO10.83%, TFe19.85%, Cr 2 O 3 / FeO1.69;

[0036] Step 2. Add the chromite powder obtained in step 1 to a hydrochloric acid solution with a concentration of 12.4mol / L according to a liquid-to-solid ratio of 3:1mL / g, and heat to 400℃ under the condition of a microwave power of 1000g / W, and use the ultrasonic power The temperature is 180W, the ultrasonic frequency is 28KHz, and the leaching is kept for 20 minutes. After the leaching is completed, the leaching residue is obtained after filtering and drying;

[0037] Step 3. Crush the leaching residue ob

[0039] Example 3

[0040] Such as figure 1 As shown, the method for preparing high chromium products by leaching chromite with hydrochloric acid combined with microwave and ultrasonic waves has the following specific steps:

[0041] Step 1. Crush the chromite ore to a particle size below 200 mesh to obtain chromite powder; the chromite includes the following mass percentage components: Cr 2 O 3 40.82%, SiO 2 5.02%, Al 2 O 3 13.04%, CaO2.4%, MgO10.83%, TFe19.85%, Cr 2 O 3 / FeO1.69;

[0042] Step 2. Add the chromite powder obtained in step 1 to a hydrochloric acid solution with a concentration of 12.0mol / L according to a liquid-to-solid ratio of 3:1mL / g, and heat up to 500℃ under the condition of a microwave power of 1300g / W, and use the ultrasonic power It is 120W and the ultrasonic frequency is 24KHz to heat preservation and leaching for 40min. After the leaching is completed, it is filtered and dried to obtain the leaching residue;

[0043] Step 3. Crush the leaching residue ob