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A treatment method for solidification and stabilization of electrolytic manganese slag

A technology of stabilization treatment and stabilization treatment agent, which is applied in the field of electrolytic manganese slag solidification and stabilization treatment, can solve the problems of high price and poor fixation effect of ammonia nitrogen, and achieve the goal of reducing dosage, reducing the cost of solidification treatment, and strong physical and mechanical properties Effect

Active Publication Date: 2021-05-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using cement to treat electrolytic manganese slag, the treatment agent has a certain curing effect on manganese ions in the slag, but the fixation effect on ammonia nitrogen in the slag is poor. Manganese reacts under the action of alkaline reagents and air to form manganese dioxide. gas volatilization
Sodium dihydrogen phosphate + calcium oxide + magnesium oxide and polyacrylamide are used as harmless treatment agents for electrolytic manganese slag. Although heavy metals and free ammonia nitrogen can be effectively solidified, the agents used are chemical reagents, which are expensive

Method used

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  • A treatment method for solidification and stabilization of electrolytic manganese slag
  • A treatment method for solidification and stabilization of electrolytic manganese slag

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Experimental program
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Effect test

Embodiment 1

[0016] Weigh electrolytic manganese slag, add solidification and stabilization treatment agent (82.8% ferronickel slag, 17.2% sodium phosphate) by weight of electrolytic manganese slag, mix and stir for 5 minutes; then add water with 30% weight of electrolytic manganese slag, mix and stir for 5 minutes , The solidified and stabilized electrolytic manganese slag is sent to the slag warehouse for storage, in which the ferronickel slag is ground through an 80-mesh sieve, and the sieve residue is 4%.

[0017] The solidified and stabilized electrolytic manganese slag is leached by the "HJ 557-2010" method, and the toxicity leaching result is lower than the standard limit of "GB 8978-1996".

Embodiment 2

[0019] Weigh the electrolytic manganese slag, add solidification and stabilization treatment agent (76.5% ferronickel slag, 23.5% sodium phosphate) with 17% weight of electrolytic manganese slag, mix and stir for 6 minutes; then add water with 25% weight of electrolytic manganese slag, mix and stir for 3 minutes , The solidified and stabilized electrolytic manganese slag is sent to the slag warehouse for storage, in which the ferronickel slag is ground through an 80-mesh sieve with a sieve allowance of 3%.

[0020] The solidified and stabilized electrolytic manganese slag is leached by the "HJ 557-2010" method, and the toxicity leaching result is lower than the standard limit of "GB 8978-1996".

Embodiment 3

[0022] Weigh the electrolytic manganese slag, add solidification and stabilization treatment agent (68.4% ferronickel slag, 31.6% sodium phosphate) by weight of electrolytic manganese slag, mix and stir for 8 minutes; then add water with 33% weight of electrolytic manganese slag, mix and stir for 5 minutes , The solidified and stabilized electrolytic manganese slag is sent to the slag warehouse for storage, in which the ferronickel slag is ground through an 80-mesh sieve, and the sieve residue is 4%. The SEM photo of the solidified and stabilized electrolytic manganese slag is shown in figure 2 , it can be seen from the figure that after the electrolytic manganese slag is solidified and stabilized, its irregular particles and columnar particles ( figure 1 ) is integrated with the product gel to form a hardened body with a dense structure ( figure 2 ).

[0023] The solidified and stabilized electrolytic manganese slag is leached by the "HJ 557-2010" method, and the toxicity...

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Abstract

The invention relates to a solidification and stabilization treatment method for electrolytic manganese slag, belonging to the technical field of environmental protection; a mixture of ferronickel slag and phosphate is used as a solidification and stabilization treatment agent for electrolytic manganese slag, and the solidified and stabilized electrolytic manganese slag is sent to a slag storehouse Stockpiling; using this method can reduce the amount of chemical reagents, reduce the cost of solidification of electrolytic manganese slag, and at the same time can play a role in waste treatment; electrolytic manganese slag is solidified by a mixture of nickel-iron slag and phosphate, and the manganese slag Soluble manganese and ammonium ions can participate in chemical reactions and form phosphate gel minerals by chemical bonding. The phosphate chemical bonding material formed has physical wrapping and adsorption; through chemical bonding, physical adsorption, and physical wrapping triple action, Thereby realizing high efficiency and large capacity solidification of electrolytic manganese slag.

Description

technical field [0001] The invention specifically relates to a solidification and stabilization treatment method for electrolytic manganese slag, which belongs to the technical field of environmental protection. Background technique [0002] Solidification / stabilization technology is the main means of harmless treatment of toxic and hazardous solid waste in the world. It wraps toxic pollutants by adding cementing materials, viscous agents and inert materials, so that pollutants are not easy to leach. The harmless disposal of electrolytic manganese slag is mainly solidification and stabilization of toxic pollutants such as manganese, ammonia nitrogen, arsenic, mercury, selenium, chromium and other compound pollutants, and the focus is on the solidification and stabilization of soluble manganese and ammonia nitrogen. Fang Xuanjin et al. used ordinary Portland cement to solidify electrolytic manganese slag. Zhou et al. used CaO and NaOH to treat heavy metals and ammonia nitrog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00
CPCB09B3/25
Inventor 罗中秋刘佳辉周新涛和森
Owner KUNMING UNIV OF SCI & TECH
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