A kind of modified coal tar pitch material and its preparation method and application

Abstract

The invention discloses a modified coal pitch material as well as a preparation method and an application thereof. The modified coal pitch material is composed of the following components in parts by weight: 100 parts of raw coal pitch, 100 parts of water, 0.1-1 part of stabilizing agent and 1-20 parts of Fenton reagent. The preparation method comprises the following steps: fully freezing the rawcoal pitch at the brittleness temperature; smashing and screening to obtain coal pitch powder of which the granularity is less than 80 meshes; adding the water and the stabilizing agent; dispersing by virtue of a blender at the revolving speed of 1000-5000 rpm (revolutions per minute) to obtain a suspension, and then controlling the revolving speed at 1000-5000 rpm; dripping the Fenton reagent atconstant temperature, and reacting at room temperature for 30-90 minutes after the Fenton reagent is added to obtain the modified coal pitch. The content of carcinogen benzopyrene in the modified coal pitch prepared by the preparation method at constant temperature is greatly lowered, the coking value is higher, energy is saved, and consumption is reduced. The modified coal pitch material can be used for preparing a magnesia carbon brick binder and a road paving material after being simply processed, thereby avoiding environmental pollution. In addition, the preparation method is simple.

Description

technical field

[0001] The invention relates to a modified coal tar pitch material used for paving roads and bonding magnesia-carbon bricks, as well as a preparation method and application thereof. Background technique

[0002] Coal tar pitch is the bulk product of coal deep processing. my country is a large coal country, and the output of coal tar pitch has reached 2.5 million tons. Therefore, the development and utilization of coal tar pitch has always been a subject of concern to researchers. Coal tar pitch can be used as binder for road paving materials, carbon material binder, coating and magnesia carbon brick bonding material, etc. However, because it contains more fused-ring aromatic hydrocarbons, benzopyrene is carcinogenic, so it was first restricted from use in Europe in view of environmental protection requirements in the 1990s. In recent years, with the increasing shortage of petroleum resources, the development and utilization of coal tar pitch has become the g...

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