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Harmless and resource utilization technology combining pretreatment of electrolytic manganese residue and preparation of composite admixture for concrete from electrolytic manganese residue

An electrolytic manganese slag and pretreatment technology, applied in cement production, etc., can solve the problems of small electrolytic manganese enterprises, difficulty in achieving economical disposal scale, inability to effectively remove ammonia nitrogen and heavy metal manganese Mn in electrolytic manganese slag, and avoid secondary Effects of pollution, enhancing application value, and solving industry pain points

Pending Publication Date: 2019-01-18
四川海沛环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a harmless and resource utilization technology combining the pretreatment of electrolytic manganese slag and the composite admixture for concrete; The existing technology cannot effectively remove the pollution problems such as ammonia nitrogen and heavy metal manganese Mn in the electrolytic manganese slag, and it can also carry out more thorough harmless treatment and comprehensive resource utilization of the electrolytic manganese slag; this technology is not only suitable for large-scale The problem of harmless treatment and comprehensive resource utilization of electrolytic manganese slag produced by electrolytic manganese enterprises is also to solve the problems in the concentrated area of ​​electrolytic manganese industrialization, where individual electrolytic manganese enterprises are small in scale and difficult to achieve economical disposal scale and other industries problem

Method used

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  • Harmless and resource utilization technology combining pretreatment of electrolytic manganese residue and preparation of composite admixture for concrete from electrolytic manganese residue
  • Harmless and resource utilization technology combining pretreatment of electrolytic manganese residue and preparation of composite admixture for concrete from electrolytic manganese residue
  • Harmless and resource utilization technology combining pretreatment of electrolytic manganese residue and preparation of composite admixture for concrete from electrolytic manganese residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Pretreatment link: harmless treatment of electrolytic manganese slag with highly active lime. The components of highly active lime are shown in Table 1:

[0053] Table 1

[0054] name

SiO 2

Al 2 o 3

Fe 2 o 3

CaO

MgO

K 2 o

Na 2 o

SO 3

highly active lime

3.71

2.85

2.00

87.41

1.73

0.50

0.12

0.41

[0055] Compound high-activity lime and electrolytic manganese slag according to the mass ratio of 1:9, and vigorously stir and mix according to step (b) in step (1), with a large amount of ammonia overflowing. After testing: the sulfuric acid in the original electrolytic manganese slag Ammonium is 3.3%. After stirring and mixing for nearly 30 minutes, the content of ammonium sulfate in the obtained mixture is 1.15%, and the ammonia gas overflow rate reaches 67%. According to the step (c) in the step (1) aging storage 2.5d, during this period, turn the material twice per hour, car...

Embodiment 2

[0060] The links of making composite admixtures for concrete:

[0061]

[0062]

[0063] The data of activated desulfurization manganese slag obtained by calcination are shown in Table 5:

[0064]

[0065] The activated desulfurized manganese slag is mixed with industrial waste slag in proportion, and is ground together by a closed-circuit ball mill to form a composite admixture for concrete, which meets the technical index requirements of "JG_T 486-2015 Composite Admixture for Concrete".

[0066] In summary, the use of the electrolytic manganese slag pretreatment provided by the present invention and the harmless and resourceful utilization technology for making composite admixtures for concrete can solve the problems in the prior art that cannot effectively solve the problem of heavy metals in electrolytic manganese slag. Manganese, ammonia nitrogen pollution and other issues.

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Abstract

The invention belongs to the technical field of industrial waste treatment and provides a harmless and resource utilization technology combining pretreatment of electrolytic manganese residue and preparation of a composite admixture for concrete from the electrolytic manganese residue. The technology comprises the following steps: (1) pretreatment; (2) preparation of a composite admixture for concrete. The technology can solve the pollution problems of the prior art that the ammonia nitrogen, soluble heavy metal manganese Mn and the like in the electrolytic manganese residue cannot be effectively removed, and also can realize relatively thorough harmless treatment and comprehensive resource utilization of the electrolytic manganese residue; the technology is not only applicable to the harmless treatment and comprehensive resource utilization of a large quantity of electrolytic manganese residue generated by a relatively large electrolytic manganese enterprise, but also solves the industrial problems that single electrolytic manganese enterprise is of relatively small scale and cannot reach a scale for economical disposal and the like in the centralized industrialization region of electrolytic manganese by combining disperse harmless pretreatment and centralized preparation of the composite admixture for concrete.

Description

technical field [0001] The invention belongs to the technical field of industrial waste treatment, and in particular relates to a harmless and resource utilization technology combining the pretreatment of electrolytic manganese slag and the composite admixture for concrete. Background technique [0002] Electrolytic manganese slag is the acidic waste produced in the electrolytic manganese production process, in which the main pollutants are soluble heavy metal ions, residual acid and ammonia nitrogen. At present, the amount of comprehensive utilization of electrolytic manganese slag resources is very small, and the proportion of comprehensive utilization of resources is less than 20%. The electrolytic manganese slag is mainly disposed of by landfill and stockpiling. However, landfilling, stacking and other means not only occupy land resources, but also cause pressure on land resources, causing pollutants to infiltrate into surrounding water bodies and soil with surface runo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/17C04B7/38C04B7/44C04B7/47
CPCC04B7/17C04B7/38C04B7/44C04B7/47Y02P40/10
Inventor 王小权舒建成代礼荣邓益忠陈梦君王建义
Owner 四川海沛环保科技有限公司
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