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Arsenic-iron slag cement solidifying method with humic acid serving as additive

A technology of cement solidification and additives, applied in chemical instruments and methods, solid waste removal, transportation and packaging, etc., to achieve the effect of cost saving, low price and simple steps

Inactive Publication Date: 2019-08-06
WESTERN MINING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the stabilizer sodium sulfide itself is corrosive and is easily hydrolyzed to generate toxic hydrogen sulfide gas

Method used

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  • Arsenic-iron slag cement solidifying method with humic acid serving as additive
  • Arsenic-iron slag cement solidifying method with humic acid serving as additive
  • Arsenic-iron slag cement solidifying method with humic acid serving as additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1. The arsenic slag in this example is specifically the iron salt arsenic slag of the acidic leaching solution of copper smelting dust. The main components of the arsenic slag are: Cu 0.57%, As 31.36%, Fe 23.49%, Zn 0.45%, Cd 0.31%, proceed as follows:

[0023] (1) According to the weight percentage of arsenic slag: Portland cement: humic acid = 100:15:1, take cement, arsenic slag and humic acid, grind them, pass through a 100-mesh sieve, and mix them evenly. After fully mixing the mixture with water, pour it into the mold and shake it fully. Natural curing at room temperature for 24 hours, demoulding;

[0024] (2) Curing the cured body after demolding at room temperature for 15 days;

[0025] (3) Carry out toxicity leaching test on the solidified body of the obtained arsenic slag, detect the leaching concentration of As plasma, and analyze the leaching concentration of relevant toxic substances according to the GB5085.3-2007 hazardous waste identification sta...

Embodiment 2

[0028] Embodiment 2, the arsenic slag in the present embodiment is the arsenic slag in embodiment 1, and the method is carried out according to the following steps:

[0029] (1) According to the weight percentage of arsenic slag: Portland cement: humic acid = 100:25:2, take cement, arsenic slag and humic acid, grind them, pass through a 100-mesh sieve, and mix them evenly. After fully mixing the mixture with water, pour it into the mold and shake it fully. Natural curing at room temperature for 24 hours, demoulding.

[0030] (2) Curing the cured body after demolding at room temperature for 20 days;

[0031] (3) Toxic leaching test was carried out on the solidified body of the obtained arsenic slag, and the leaching concentration of As plasma was detected, and the leaching concentration of relevant toxic substances was analyzed according to the GB5085.3-2007 hazardous waste identification standard, and the results are shown in Table 2.

[0032] Table 2 Concentration of each i...

Embodiment 3

[0034] Example 3, the arsenic slag in this embodiment is specifically the iron salt arsenic precipitation slag of the acidic leaching solution of copper smelting dust, and the main components of the arsenic precipitation slag are: Cu 0.03%, As 16.48%, Fe 16.3%, Zn 1.01%, Cd 0.45%. The method proceeds as follows:

[0035] (1) According to the weight percentage of arsenic slag: Portland cement: humic acid = 100:20:3, take cement, arsenic slag and humic acid, grind them, pass through a 100-mesh sieve, and mix them evenly. After fully mixing the mixture with water, pour it into the mold and shake it fully. Natural curing at room temperature for 24 hours, demoulding.

[0036] (2) The cured body after demoulding is naturally cured for 25 days at room temperature;

[0037] (3) Carry out toxicity leaching test on the solidified body of the obtained arsenic slag, detect the leaching concentration of As plasma, and analyze the leaching concentration of relevant toxic substances accor...

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Abstract

The invention discloses an arsenic-iron slag cement solidifying method with humic acid serving as an additive. The process comprises the steps that arsenic-iron slag, cement and the additive are mixedaccording to the mass percent ratio of 100:(15-25):(1-3); a mixture and water are fully mixed uniformly, obtained slurry is poured into a mould, vibration forming is performed, and demoulding is performed after 24 hours of natural curing; and a demoulded solidified body is subjected to 15-45 days of natural curing under the room temperature. The arsenic-iron slag cement solidifying method with humic acid serving as the additive has the advantages that the process is simple, operation is convenient, the arsenic slag solidifying efficiency is high, the treatment cost is low, and a reagent is nontoxic, and a remarkable social and environmental effect can be achieved while the cost is saved.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal smelting waste treatment, in particular to a method for solidifying arsenic-iron slag with cement. Background technique [0002] Nonferrous metal smelting is a high energy consumption and high pollution industry. China's nonferrous metal production has ranked first in the world for six consecutive years. Among them, the output of copper is second only to aluminum, and occupies an important position in the non-ferrous metal industry. Global refined copper production has shown an increasing trend from 2011 to 2017, and the continuous growth of copper production has brought severe challenges to the reduction of the total amount of pollutants in the industry. [0003] During the copper smelting process, a large amount of smoke and dust will be generated due to physical and chemical effects such as fuel combustion, gas carrying materials, and metal volatilization and oxidation at high tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
CPCB09B3/25
Inventor 严海军白鹰使政良朱伯军邢树欣唐超尧张松曹成超邵海龙李洪明
Owner WESTERN MINING CO LTD
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