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Method for improving corrosion resistance of refractory material of heavy metal solid waste melting furnace in situ

A refractory material and anti-corrosion technology, which is applied in the field of solid waste treatment and recycling, can solve the problems of high cost and complicated manufacturing process, and achieve the effect of excellent corrosion resistance, simple method and short cycle

Inactive Publication Date: 2019-05-10
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these metal coatings have problems such a

Method used

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Experimental program
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Embodiment 1

[0010] This specific embodiment adopts the following technical solutions: a method for in situ improving the corrosion resistance of refractory materials in a heavy metal solid waste melting furnace, comprising the following steps:

[0011] A. Use sludge containing iron, chromium, nickel and aluminum as raw material, and dry it, and then mix according to the content ratio of different heavy metals. After mixing, the chromium content accounts for 24%, and the nickel content is 24%. 24%, iron 40%, aluminum 5%;

[0012] B. Add water to the mixed sludge in step (A), stir for 25 minutes according to the solid-to-liquid ratio of 1:3, then filter with suction, keep the solid sludge, and put it into an oven at 100°C for drying;

[0013] C, with the sludge obtained in the step (B), use ball mill to mix uniformly with chloride under 100rpm rotating speed, then pass through the mesh screen of 100, obtain sludge powder;

[0014] D. Put the sludge powder obtained in step (C) into a meltin...

Embodiment 2

[0019] This specific embodiment adopts the following technical solutions: a method for in situ improving the corrosion resistance of refractory materials in a heavy metal solid waste melting furnace, comprising the following steps:

[0020] A. Use sludge containing iron, chromium, nickel and aluminum as raw material, dry it, and then mix according to the content ratio of different heavy metals. After mixing, the chromium content accounts for 35%, and the nickel content is 35%. 16%, iron is 40%, aluminum is 5%;

[0021] B. Add water to the mixed sludge in step (A), stir for 15 minutes according to the solid-to-liquid ratio of 1:6, then filter with suction, keep the solid sludge, and put it into an oven at 85°C for drying;

[0022] C, with the sludge obtained in the step (B), use ball mill to mix uniformly with chloride under 200rpm rotating speed, then pass through the mesh screen of 100, obtain sludge powder;

[0023] D. Put the sludge powder obtained in step (C) into a melti...

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Abstract

The invention discloses a method for improving corrosion resistance of a refractory material of a heavy metal solid waste melting furnace in situ. According to the material preparing method, heavy metal pollutants in sludge are used for synthesizing the material, synthesizing is carried out without a valuable reagent, the corrosion resistance of the refractory material on the wall of the furnace is improved in situ, main components of the material comprise nickel ions, iron ions and chromium ions, when aluminum ions are added, the electron mutual effect between the ions can be formed, combination strength between a modified layer face and a base body is improved, the corrosion resistance of the material is improved, through control over the hydrogen flow speed in the furnace, the thicknessof a deposition material can be controlled, the method for reinforcing the refractory matter in situ is simple, convenient, easy to operate, short in period, low in cost, and excellent in corrosion resistance and has the important engineering significance, and meanwhile, industrial dangerous waste resource use is achieved.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment and resource utilization, in particular to a method for in situ improving the corrosion resistance of refractory materials in a heavy metal solid waste melting furnace. Background technique [0002] At present, a problem has been brought about in the melting process of solid waste in my country. Due to the presence of chlorine in solid waste, it has a more serious impact on the corrosion and safe operation of the incineration boiler. For example, Chinese patent 201510728758.1 is titled a preparation method of powder sintered metal porous body resistant to chlorine gas corrosion, in which nickel element powder, chromium element powder and iron element powder are mixed according to mass percentage to form a material, which has excellent resistance to chlorine gas corrosion performance. The existing materials are mainly formed by reacting reagents. Nickel is a moderately active metal t...

Claims

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Application Information

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IPC IPC(8): F27D1/16
Inventor 周吉峙季美婷侯昊张佳钱光人
Owner SHANGHAI UNIV