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Method for preparing potassium chloride fertilizer by using chlorine-containing titanium extraction slag

A technology of potassium chloride fertilizer and titanium slag, applied in the direction of potassium fertilizer, aluminum hydroxide preparation, alkali metal chloride, etc., can solve the problems of potential pollution hazards in the surrounding environment, and achieve the effect of reducing chlorine content

Active Publication Date: 2021-10-26
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] On the one hand, the titanium extraction slag contains chlorine and has potential pollution hazards to the surrounding environment. On the other hand, the domestic import of potassium chloride fertilizer has increased, and the price has reached new highs. If the chlorine in the titanium extraction slag can be used to prepare potassium chloride fertilizer , while turning waste into wealth, it can also meet the growing domestic agricultural demand, reduce imports, and meet domestic demand

Method used

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  • Method for preparing potassium chloride fertilizer by using chlorine-containing titanium extraction slag
  • Method for preparing potassium chloride fertilizer by using chlorine-containing titanium extraction slag
  • Method for preparing potassium chloride fertilizer by using chlorine-containing titanium extraction slag

Examples

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example 1

[0068] The preparation method of this example comprises the following steps:

[0069] Distilled water is used to immerse and wash the chlorine-containing titanium extraction slag, and separate the solid and liquid to obtain the first filter residue of the titanium extraction slag and the first filtrate of the chlorine-containing solution. The mass percentage of chlorine in the first filter residue is 0.45%.

[0070] The concentration of magnesium and aluminum plasma in the first filtrate was tested to be 0.12mol / L and 0.0002mol / L respectively.

[0071] According to the tested concentration of magnesium and aluminum ions, add quicklime, the amount of quicklime added is 0.1203mol / L, fully stir and age until the magnesium and aluminum ions in the filtrate are completely precipitated. The judgment of complete precipitation is that the corresponding ion content does not exceed the natural content of tap water or river and lake water near the production plant.

[0072] Filtrate th...

example 2

[0080] The preparation method of this example comprises the following steps:

[0081] Distilled water is used to immerse and wash the chlorine-containing titanium extraction slag, and separate the solid and liquid to obtain the first filter residue of the titanium extraction slag and the first filtrate of the chlorine-containing solution. The mass percentage of chlorine in the first filter residue is 0.1%.

[0082] The concentration of magnesium and aluminum plasma in the first filtrate was tested to be 0.14mol / L and 0.0006mol / L respectively.

[0083] According to the tested concentration of magnesium and aluminum ions, add quicklime in an amount of 0.1408 mol / L, fully stir and age until the magnesium and aluminum ions in the filtrate are completely precipitated. The judgment of complete precipitation is that the corresponding ion content does not exceed the natural content of tap water or river and lake water near the production plant.

[0084] Filtrate the first filtrate w...

example 3

[0092] The preparation method of this example comprises the following steps:

[0093] Distilled water is used to immerse and wash the chlorine-containing titanium extraction slag, and separate the solid and liquid to obtain the first filter residue of the titanium extraction slag and the first filtrate of the chlorine-containing solution. The mass percentage of chlorine in the first filter residue is 0.05%.

[0094] The concentration of magnesium and aluminum plasma in the first filtrate was tested to be 0.10 mol / L and 0.0004 mol / L respectively.

[0095] According to the tested concentration of magnesium and aluminum ions, add quicklime, the amount of quicklime added is 0.1006mol per liter of solution, fully stir and age until the magnesium and aluminum ions in the filtrate are completely precipitated. The judgment of complete precipitation is that the corresponding ion content does not exceed the natural content of tap water or river and lake water near the production plant....

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Abstract

The invention provides a method for preparing a potassium chloride fertilizer by using chlorine-containing titanium extraction slag. The method comprises the following steps: carrying out wet treatment on the chlorine-containing titanium extraction slag, and carrying out solid-liquid separation to obtain a first filter residue and a first filtrate; precipitating magnesium and aluminum ions in the first filtrate, and filtering to obtain second filtrate and second filter residues; concentrating the second filtrate to obtain a chlorine-containing concentrated solution; adding a potassium hydroxide solution into the chlorine-containing concentrated solution, wherein the addition amount of potassium carbonate is appropriate to enable calcium ions in the first filtrate to completely form calcium carbonate precipitates, and obtaining third filter residues and third filtrate through filtering; and heating the third filtrate, and evaporating to remove moisture to obtain the potassium chloride fertilizer. The method has the beneficial effects that solid waste resources are recycled, the chlorine element in the titanium extraction slag can be recycled, waste is turned into wealth, and adverse conditions are changed into favorable conditions.

Description

technical field [0001] The invention relates to the technical field of resource utilization, in particular to a method for preparing potassium chloride fertilizer by utilizing chlorine-containing titanium extraction slag. Background technique [0002] When Panzhihua Iron and Steel Group used the chlorination method to extract titanium from the high-titanium blast furnace, a large amount of chlorine-containing titanium extraction tailings were produced. At present, it is mainly stockpiled. While occupying a large amount of land resources, it also has potential pollution hazards to the surrounding environment. This enterprise has caused huge economic, environmental and social pressures. How to deal with and utilize these chlorine-containing titanium extraction slags has become an urgent problem to be solved in terms of sustainable development and environmental protection of this titanium extraction process. [0003] At the same time, it is reported that the domestic import of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05D1/02C01D3/04C01F5/22C01F7/34C01F11/18C04B7/147C04B18/14
CPCC05D1/02C04B7/147C04B18/141C01F5/22C01F7/34C01F11/18C01D3/04Y02W30/91Y02P40/10
Inventor 唐颂彭同江孙红娟
Owner SOUTHWEAT UNIV OF SCI & TECH
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