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Method for preparing water body chemical oxygen demand (COD) degradation catalyst by using laterite nickel ore smelting waste residue, and application of catalyst in ozone degradation of COD

A technology of laterite nickel ore and catalyst, which is applied in the field of industrial waste slag resource utilization and water pollution control, which can solve the problems of small profit margin of building materials, inability to large-scale long-distance transportation and effective utilization, etc., to eliminate environmental risks and enrich resources The effect of utilization

Active Publication Date: 2018-12-11
芜湖格丰环保科技研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because smelting waste slag is often rich in pollution factors such as Cr, Ni, Pb, etc., it can still be dissolved out even after high-temperature calcination if it is not properly disposed of; and the cost of waste slag transportation, storage and processing, etc., the profit margin of the produced building materials is small, and it cannot be sold on a large scale. Long distance transport and efficient use

Method used

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  • Method for preparing water body chemical oxygen demand (COD) degradation catalyst by using laterite nickel ore smelting waste residue, and application of catalyst in ozone degradation of COD

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The MnSO used in embodiment 1 4 The preparation method of sulfuric acid solution is: first dilute 90.26kg 98% concentrated sulfuric acid with water to 300L aqueous solution, add 20.83kg MnSO 4 After powdering, add water to 400L. MnSO 4 MnSO in sulfuric acid solution 4 Concentration is 0.052kg / L, H 2 SO 4 The concentration is 0.221kg / L (2.26mol / L).

Embodiment 2

[0056] Mn(NO) used in embodiment 2 3 ) 2 The preparation method of nitric acid solution is as follows: first dilute 167.24kg of 68% concentrated nitric acid with water to 350L aqueous solution, add 57.61kg of 50wt% Mn(NO 3 ) 2 solution, and then add water to 500L. Mn(NO 3 ) 2 The concentration is 0.058kg / L, HNO 3 The concentration is 0.227kg / L (3.61mol / L).

Embodiment 3

[0057] Mn(NO) used in embodiment 3 3 ) 2 The preparation method of the nitric acid solution is as follows: the preparation of the solution promptly dilutes 167.24kg of 68% concentrated nitric acid with water to a 300L aqueous solution, and adds 49.38kg of 50wt% Mn(NO 3 ) 2 solution, and then add water to 400L. Mn(NO 3 ) 2 The concentration is 0.062kg / L, HNO 3 The concentration is 0.284kg / L (4.51mol / L).

[0058] Example 1

[0059] The method for preparing a water body COD degradation catalyst by using laterite nickel ore smelting waste residue comprises the following steps:

[0060] (1) Weigh 200kg of the waste residue, crush it through a 100-mesh sieve, collect 100kg of crushed waste residue, vacuum suction it into a 1000L jacketed reactor, heat it with steam to control the temperature to 80°C, and add 400L MnSO 4 sulfuric acid solution, reacted at 80°C for 1h under stirring conditions.

[0061] (2) At 80°C, weigh 80kg of 300-mesh attapulgite and 20kg of 200-mesh bent...

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Abstract

The invention provides a method for preparing a water body chemical oxygen demand (COD) degradation catalyst by using laterite nickel ore smelting waste residue, and application of the catalyst in ozone degradation of COD. On the basis of addition of the nickel ore smelting waste residue, natural porous clay minerals with an amount being 35-100% of the weight of the nickel residue is supplemented,manganese salt is added to supplement the active components of the catalyst, and the manganese salt, equivalent to MnO2, accounts for 6-18% of the weight of the waste residue; the molded column stripcatalyst is prepared by the steps of acid leaching, mixing, precipitating, centrifugal washing, pugging, extruding, drying, roasting, and the like. Compared with the prior art, the high efficiency water body COD degradation catalyst prepared by the method does not produce waste gases, waste solids and the like in a technological process, only generates a small amount of saline and alkaline wastewater, and is simple and feasible in process, environmentally-friendly and high in economy. Furthermore, the method successfully overcomes the risk of leaching of poisonous metals in the waste residue;after the catalyst is used, the COD removal rate can exceed 85%, but the COD removal rate is only 65% within 40 min under the same conditions, so that the removing efficiency is increased by 31% or above.

Description

technical field [0001] The invention belongs to the field of resource utilization of industrial waste slag and water body pollution control, and specifically relates to a method for preparing a water body COD degradation catalyst by using laterite nickel ore smelting waste slag and the application of ozone to degrade COD. Background technique [0002] Laterite nickel ore is nickel-containing olivine. It is a loose clay-like ore composed of iron, aluminum, silicon and other hydrous oxides. The ore is red, so it is called laterite nickel ore. A large amount of smelting slag is often associated with the production of alloys. Since most nickel alloy manufacturing enterprises lack measures for secondary disposal and utilization of slag, millions of tons of solid waste are formed. A large amount of waste residues occupy a large site area, which not only wastes land resources but also poses a great potential pollution hazard to surrounding water bodies and soils. How to better util...

Claims

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Application Information

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IPC IPC(8): B01J23/889C02F1/78
CPCB01J23/8892C02F1/725C02F1/78
Inventor 郭进进章文贵龚梅玲奉向东
Owner 芜湖格丰环保科技研究院有限公司