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Method for preparing white carbon black and manganese fertilizer from manganese leaching residue

A technology for extracting slag and white carbon black, which is applied in the direction of silicon dioxide and silicon oxide, which can solve the problems of manganese obstacles in plants, hindering crop growth, and rising manufacturing costs, so as to increase the content of silicon dioxide and improve the degree of porosity , improve the grade effect

Inactive Publication Date: 2011-02-16
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the content of citrate-soluble manganese in the manganese fertilizer is less than 3wt%, the application amount will be large; but if it exceeds 15wt%, the manufacturing cost will rise and hinder the growth of crops; the content of citrate-soluble manganese is preferably 3wt% ~ 10wt%; The content of soluble manganese is required to be greater than 0.5wt%, but if it is greater than 7wt%, it is easy to cause manganese barriers in plants. Therefore, the range of water-soluble manganese is limited to 0.5wt% ~ 7wt%, preferably 1.5wt% ~ 3wt%

Method used

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  • Method for preparing white carbon black and manganese fertilizer from manganese leaching residue

Examples

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Effect test

Embodiment 1

[0034] A kind of method utilizing manganese leaching slag to prepare white carbon black and manganese fertilizer, the steps are as follows:

[0035](1) 100g of manganese leaching residue is washed twice with 150g of dilute sulfuric acid solution of 0.05wt%, and then washed to neutrality with tap water;

[0036] (2) filter residue and 400 g of 25 wt % sodium hydroxide solution, react at 90° C. for 5 h, filter, and wash the filter residue with distilled water to neutrality, and merge the washing solution into the filtrate, and collect the filter residue;

[0037] (3) The filtrate obtained in step (2) was successively decolorized with 0.7 g of activated carbon and 1.0 g of carboxyl-terminated hyperbranched polyester at 110° C. for 5 min to obtain a light yellow to colorless silicate aqueous solution;

[0038] (4) Add the aqueous silicate solution obtained in step (3) into the reaction kettle, add 100 g of water, slowly add 600 g of 10 wt % sulfuric acid and 0.5 g of carboxyl-term...

Embodiment 2

[0042] A kind of method utilizing manganese leaching slag to prepare white carbon black and manganese fertilizer, the steps are as follows:

[0043] (1) 100g of manganese leaching residue is washed twice with 200g of dilute sulfuric acid solution of 0.08wt%, and then washed to neutrality with tap water;

[0044] (2) React the filter residue and 500 g of 30 wt % potassium hydroxide solution at 100° C. for 4 h, filter, and wash the filter residue with distilled water to neutrality, and merge the washing liquid into the filtrate, and collect the filter residue;

[0045] (3) The filtrate obtained in step (2) was successively decolorized with 0.8 g of activated carbon and 1.0 g of carboxyl-terminated hyperbranched polyester at 120° C. for 5 minutes to obtain a light yellow to colorless silicate aqueous solution;

[0046] (4) The silicate aqueous solution that step (3) obtains is joined in the reaction kettle, add water 120g, slowly drip the sulfuric acid 400g of 20wt% and 0.7g term...

Embodiment 3

[0050] A kind of method utilizing manganese leaching slag to prepare white carbon black and manganese fertilizer, the steps are as follows:

[0051] (1) 100g of manganese leaching residue is washed twice with 250g of 1.0wt% dilute sulfuric acid aqueous solution successively, and then washed to neutrality with tap water;

[0052] (2) React the filter residue and 300 g of 40 wt % potassium hydroxide solution at 120° C. for 2 h, filter, and wash the filter residue with distilled water to neutrality, and merge the washing solution into the filtrate, and collect the filter residue;

[0053] (3) The filtrate obtained in step (2) was successively decolorized with 0.9 g of activated carbon and 0.8 g of carboxyl-terminated hyperbranched polyester at 100° C. for 5 minutes to obtain a light yellow to colorless silicate aqueous solution;

[0054] (4) Add the aqueous silicate solution obtained in step (3) into the reactor, add 150g of water, slowly add 20wt% hydrochloric acid 500g and carb...

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Abstract

The invention discloses a method for preparing white carbon black and manganese fertilizer from manganese leaching residue. The method comprises the following steps: 1, washing the manganese leaching residue with dilute sulphuric acid solution and running water in turn to obtain the residue; 2, conducting reaction between the residue and 25 to 40% strong base solution by mass at 90 to 120 DEG C for 2 to 5 h, and filtering to obtain filtrate; 3, decoloring the filtrate with active carbon and then carboxyl-terminated hyperbranched polyester at 100 to 120 DEG C to obtain the aqueous solution of silicate; 4, adding water and then inorganic acid and carboxyl-terminated hyperbranched polyester for reaction at 40 to 90 DEG C for 0.5 to 2 h to obtain the white carbon black; and 5, drying and dehydrating the residue obtained in step 2 and adding into a high-speed mixer, adding phosphoric acid, anticaking agent and manganese sulfate into the high-speed mixer, and mixing at room temperature for 10 to 20 min to obtain the manganese fertilizer. The method is simple in process and low in cost and is suitable for industrial production; and the silicon dioxide content of the prepared white carbonblack is more than 95% by mass, the specific area is more than 270 m<2> / g and the particle size is less than 50 nm.

Description

technical field [0001] The invention relates to the technical field of recovery and reuse of industrial waste slag, in particular to a method for preparing white carbon black and manganese fertilizer by using manganese leaching slag, and the method is suitable for recycling of industrial manganese leaching slag. Background technique [0002] Manganese is a raw material for the production of steel and stainless steel. Driven by the continuous growth of steel production, my country's demand for manganese ore continues to rise. As the world's largest producer of manganese-based ferroalloys, China produced 7.45 million tons of manganese-based alloys in 2008. my country is a country rich in manganese ore resources in the world, but the average grade of manganese ore in our country is low, and 93.6% of the manganese ore reserves in the country belong to poor manganese ore. According to statistics, every ton of manganese produced will bring 6-7 tons of manganese slag. Moreover, wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12C05D9/02
Inventor 李廷成张道洪周继亮叶恒朋张爱清杜冬云
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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