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Control method of potassium content in ammonium molybdate solution

A control method, ammonium molybdate technology, applied in the field of metallurgy, can solve problems such as poor removal of potassium ions, difficult treatment of pickling wastewater, environmental pollution, etc., and achieve the effects of reducing adverse effects, simple and effective methods, and reducing production costs

Inactive Publication Date: 2018-06-05
JINDUICHENG MOLYBDENUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the pickling / acid precipitation process, part of the molybdenum is dissolved in the acid, the loss of molybdenum is relatively large, and a large amount of pickling wastewater that is not easy to handle is produced, which pollutes the environment
In addition, some studies have used ion exchange method to adsorb potassium with resin or zeolite, but due to the competitive adsorption between potassium and ammonium ions, the removal effect of potassium ions is not good, and a large amount of waste water is generated at the same time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] This embodiment includes the following steps:

[0021] Step 1. After mixing 30 g of high potassium molybdenum calcine and 75 g of low potassium molybdenum calcine uniformly, a mixed molybdenum calcine is obtained; the mass content of molybdenum in the high potassium molybdenum calcine is 61.42% and the mass content of potassium is 0.15% , The mass content of molybdenum in the low potassium molybdenum calcine is 63.42%, and the mass content of potassium is 0.066%;

[0022] Step 2. Add the mixed molybdenum calcine obtained in step 1 to 262.5 mL of water, wash with water for 1 hour at a temperature of 95°C, and filter to obtain a filter cake;

[0023] Step 3. Add the filter cake obtained in step 2 to ammonia water with a pH of 8.0, ammonia leaching treatment at a temperature of 60°C for 1 hour, and filtration to obtain an ammonium molybdate solution; the mass ratio of the filter cake to the ammonia water It is 1:2.

[0024] After testing, the content of each element in the ammoni...

Embodiment 2

[0026] This embodiment includes the following steps:

[0027] Step 1. Mix 20 g of high potassium molybdenum calcine and 70 g of low potassium molybdenum calcine to obtain mixed molybdenum calcine; the mass content of molybdenum in the high potassium molybdenum calcine is 62.2%, and the mass content of potassium is 0.13% , The mass content of molybdenum in the low potassium molybdenum calcine is 63.78%, and the mass content of potassium is 0.060%;

[0028] Step 2: Add the mixed molybdenum calcine obtained in step 1 to 243mL water, wash with water for 1.2h at a temperature of 98°C, and obtain a filter cake after filtration;

[0029] Step 3. Add the filter cake obtained in step 2 to ammonia water with a pH of 8.2, and ammonia leaching treatment for 1.2 h at a temperature of 65° C. to obtain an ammonium molybdate solution after filtration; the quality of the filter cake and ammonia water The ratio is 1:2.2.

[0030] After testing, the content of each element in the ammonium molybdate sol...

Embodiment 3

[0032] This embodiment includes the following steps:

[0033] Step 1. After mixing 30 g of high potassium molybdenum calcine and 90 g of low potassium molybdenum calcine uniformly, a mixed molybdenum calcine is obtained; the mass content of molybdenum in the high potassium molybdenum calcine is 63.0% and the mass content of potassium is 0.1% , The mass content of molybdenum in the low potassium molybdenum calcine is 63.42%, and the mass content of potassium is 0.066%;

[0034] Step 2: Add the mixed molybdenum calcine obtained in Step 1 to 360 mL of water, wash with water for 1.3 hours at a temperature of 99°C, and obtain a filter cake after filtration;

[0035] Step 3. Add the filter cake obtained in step 2 to ammonia water with a pH of 8.5, and ammonia leaching treatment for 1.3 hours at a temperature of 70° C. to obtain an ammonium molybdate solution after filtration; the quality of the filter cake and ammonia water The ratio is 1:2.4.

[0036] After testing, the content of each el...

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Abstract

The invention discloses a control method of potassium content in an ammonium molybdate solution. The method comprises the following steps: I, uniformly mixing high potassium molybdenum roasted sand and low potassium molybdenum roasted sand to obtain mixed molybdenum roasted sand; II, washing the mixed molybdenum roasted sand, and filtering the mixed molybdenum roasted sand to obtain filter cake; and III, adding the filter cake into ammonia water for ammonia leaching and filtering the mixture to obtain the ammonium molybdate solution. By taking mass contents of molybdenum and potassium as indexes, the raw material molybdenum roasted sand is divided into the high potassium molybdenum roasted sand and low potassium molybdenum roasted sand which are mixed in proportion, and washed and ammonialeached to obtain the ammonium molybdate solution, so that the potassium content of the raw material is controlled from source, excessive potassium is prevented from entering the ammonia water solution, and therefore, the potassium content in the ammonium molybdate solution is controlled. The ammonium molybdate solution, the molybdenum content of which is 250-300g / L and the potassium content of which is 30-40mg / Lm is obtained. The method is simple and effective and easy to implement.

Description

Technical field [0001] The invention belongs to the technical field of metallurgy, and specifically relates to a method for controlling the potassium content in an ammonium molybdate solution. Background technique [0002] Ammonium molybdate is an important metallurgical chemical raw material, mainly used to prepare molybdenum trioxide and metal molybdenum powder, and then to prepare molybdenum alloys, molybdenum wires and other molybdenum materials. In addition, ammonium molybdate can also be used to prepare catalysts and agricultural molybdenum fertilizers. . [0003] The preparation of ammonium molybdate mainly uses the principle that molybdenum trioxide is easily dissolved in ammonia water to generate ammonium molybdate solution. The raw molybdenum calcine is placed in ammonia water to leaching molybdenum in the molybdenum calcine to obtain an ammonium molybdate solution. Evaporate and crystallize to obtain ammonium molybdate product. In this process, the impurity elements in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/14C22B34/34
CPCC22B3/14C22B34/34Y02P10/20
Inventor 唐军利
Owner JINDUICHENG MOLYBDENUM CO LTD