Grate of heat, wear and corrosion-resisting large mechanical reciprocating incinerator and manufacture method of grate

Abstract

The invention discloses a grate of a heat, wear and corrosion-resisting large mechanical reciprocating incinerator and a manufacture method of the grate. The grate comprises the following components in percent by weight: 0.4-1.9 percent of C, 1.0-2.0 percent of Si, 1.0-1.5 percent of Mn, not more than 0.03 percent of P, not more than 0.03 percent of S, 25-28 percent of Cr, 3-4 percent of Ni, 0.02-0.08 percent of Mo, less than 0.1 percent of B, 0.1-0.5 percent of V, 0.01-0.04 percent of Ce and the balance of Fe and inevitable trace impurities. The grate gives consideration to excellent heat, wear and corrosion properties, meets the design requirement of the large mechanical reciprocating incinerator, has lower cost and long service life, can effectively reduce production cost of the waste incineration company, is especially suitable for large garbage incinerators in cities in China, and can have better popularization and application prospect.

Description

technical field [0001] The invention relates to a fire grate and a manufacturing method thereof, in particular to a heat-resistant, wear-resistant and corrosion-resistant large-scale mechanical reciprocating furnace grate and a manufacturing method thereof. Background technique [0002] The use of incineration to dispose of solid waste is an effective means to realize its harmlessness, reduction and resource utilization, and has received increasing attention both at home and abroad. The mechanical reciprocating grate incinerator has perfect and reliable technology, large capacity, and strong adaptability to garbage. It is especially suitable for the characteristics of high moisture and low calorific value of urban domestic garbage in my country, so it is widely used. The grate is an important part of the mechanical reciprocating furnace to pile up garbage and make it fully combustible. The material of the grate has an important impact on the reliability and combustion effici...

AI Technical Summary

Problems solved by technology

Aluminum-based heat-resistant cast irons such as RQTAl5-Si5, RQTAl5-Si5-Mo0.2 and RQTAl22 have excellent high-temperature oxidation resistance due to the addition of Al, but their resistance to temperature differences is poor, and the high-temperature impact value is low. Lively, it is easy to burn out in the process of alloy smelting, it needs to adopt more complex smelting equipment and technology, and the production cost is high

The heat-resistant temperature of silicon-based heat-resistant cast iron cannot reach the heat-resistant temperature of large-scale mechanical reciprocating furnaces. At the same time, its strength is low, its tendency to brittle cracks is high, it is easy to break when it is impacted, and its service life is short (less than 4000 hours). h reciprocating furnace

Therefore, the imported large-scale mechanical reciprocating furnace grate is not only not completely suitable for municipal waste incinerators, but also expensive, and the cost of grate replacement will directly greatly increase the cost of waste incineration

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