Preparation method of pre-swelling plant particle pore-forming agent

Abstract

The invention relates to a preparation method of a pre-swelling plant particle pore-forming agent. The method comprises the following steps: purifying plant particles, crushing the purified plant particles and screening out the extra large particles; finely crushing the extra large particles to obtain mixed particles; soaking mixed particles into a high osmotic pressure water solution according to the proportion between mixed particles per ton and the water solution; after the mixed particles are completely soaked, throwing off the free moisture among the particles; controlling the temperature in a converter to be within the range of 80-120 DEG C, and parching to remove the water adsorbed on the surfaces of the particles; after that, enabling the particles to become powder with good fluidity; adding a hydrophobic material into the plant particles to carry out hydrophobic surface coating on the surfaces of the particles, wherein the weight of the hydrophobic material is 3-8% of the dry weight of the plant particles; discharging the coated material, and naturally cooling the material to the room temperature; carrying out fine screen on the particles until the particle sizes of the particles meet the particle requirement to obtain the finished product. The pre-swelling plant particle pore-forming agent can be used for replacing refined naphthalene, a grinding wheel production technology is not changed, and the prepared grinding wheel is good in all technical indexes, so that the pre-swelling plant particle pore-forming agent is very suitable for manufacturing the high-strength grinding wheel.

Description

technical field [0001] The invention relates to a method for manufacturing a pore-forming agent, in particular to a method for manufacturing a plant particle pore-forming agent. Background technique [0002] Pore-forming agent refers to the auxiliary agent used to generate pores in the production of grinding wheels and porous ceramics. Vitrified bonded pore grinding wheels are traditionally made of organic compounds such as refined naphthalene-para-dichlorobenzene. The pore-forming mechanism of such substances is Utilizing the characteristics of low melting boiling, easy volatilization, and easy sublimation of this kind of compound, after the product is formed, it is heated to make the pore forming agent volatilize and sublimate into the air, and the vacancies left are the "pores" in the finished product. Porogens such as refined naphthalene have a strong odor, are flammable and explosive, and are also a carcinogen and a source of environmental air pollution. Working under t...

AI Technical Summary

Problems solved by technology

Porogens such as refined naphthalene have a strong smell, are flammable and explosive, and are also a carcinogen and a source of environmental air pollution. Working under this smell will first cause nausea, dizziness and other adverse reactions

In order to solve environmental problems, people began to use non-toxic and tasteless walnut shell particles to replace refined naphthalene, but there are problems such as the walnut shell absorbs water and the particles expand during use, which will cause the volume of the green body to rebound and the green body to crack.