High-temperature-resistant oil shale powder slag cold-pressing ball and preparation method thereof

Abstract

The invention discloses a high-temperature-resistant oil shale powder slag cold-pressing ball. The oil shale powder slag cold-pressing ball is characterized by being prepared from 2 to 5 weight percent of adhesive, 5 to 10 weight percent of coal slurry and the balance of oil shale raw ores, and has the diameter of between 30 and 60mm and the intensity of between 50 and 200kg/cm<2>, wherein the adhesive is cement or a self-made adhesive and is prepared from 20 to 40 mass percent of bentonite, 20 to 30 mass percent of viscose and the balance of water. Waste oil shale powder slag is successfully prepared into the oil shale powder slag cold-pressing ball which is subjected to dry distillation in a furnace and is used for extracting petroleum; and the oil shale powder slag cold-pressing ball has high intensity, greatly reduces mining cost without the reduction in oil yield, saves resources, reduces pollution, has high temperature resistance, effectively prolongs the furnace cleaning period of an oil smelter and improves working efficiency.

Description

technical field [0001] The invention relates to the field of refining shale oil, and in particular provides a high-temperature-resistant cold-pressed ball of oil shale powder and slag and a preparation method thereof. Background technique [0002] Oil shale is an oil-bearing rock formation and is an important energy material, mainly used for power generation and extraction of shale oil. In the world, oil shale that can produce more than 0.25 barrels (ie 0.034 tons) of shale oil per ton of oil shale is often called "oil shale mine", or oil shale with an oil production rate higher than 4%. for the mine. In my country, oil shale with an oil content of more than 5% is defined as a rich ore, and reserves are calculated; oil shale with an oil content of less than 5% is defined as a lean ore, and reserves are not calculated. Oil shale reserves are huge, if converted into calorific value, the world's oil shale reserves rank second only to coal, and are 5.4 times the proven recover...

AI Technical Summary

Problems solved by technology

[0004] However, the existing retort refinery equipment (domestic Fushun retort and Brazilian retort) that can operate continuously for a long time (more than 330 days per year) has four major disadvantages: ① Detrital shale below 8-15mm (accounting for the total 20-25% of the total) was discarded; ② Massive shale [(8-15)mm, accounting for 75-80% of the total], the refining oil yield is 63% (Fushun type) ~ 90% (Brazil), namely 10~37% shale oil loss; ③The residue after dry distillation (the Fushun type is called ashes, the Brazilian type is called semi-coke) has a calorific value of 2500~3800kj / kg, and the heat loss is large; ④The environmental pollution of slag discharge, waste gas and sewage exceeds the standard

However, due to its low oil content, low calorific value, and high development and utilization costs, it is not competitive in the era of low oil and coal prices.

With the continuous growth of global energy demand and the rapid rise of world oil prices, it is of great practical significance to seek effective development and economic utilization of oil shale to alleviate the contradiction between energy supply and demand and promote social development. However, in the existing technology Even if the clastic shale below 8-15mm can be refined, there is still an important problem-short furnace cleaning cycle and low work efficiency