China University of Mining and Technology

Chenlong Duan

Yuemin Zhao

Bo Zhang

Liang Dong

Zhenfu Luo

Chenyang Zhou

Pengfei Zhao

Enhui Zhou

Zhijie Fu

Xuliang Yang

Xuchen Fan

Zengqiang Chen

Jesse Zhu

Junyu Lu

Shulei Song

Yadong Zhang

Jingfeng He

Guanghui Yan

Provided is a gas-solid fluidized bed dry beneficiation process using a beneficiation density gradient, including: in a dry beneficiation system of a gas-solid fluidized bed, selecting coarse particles and fine particles; placing the coarse particles at a bottom of the dry beneficiation system, and placing the fine particles above the coarse particles, wherein the coarse particles and the fine particles are separated under an initial condition; under an effect of a gas flow, the coarse particles and the fine particles being fluidized to form a high-density beneficiation region and a low-density beneficiation region, respectively, and the coarse particles and the fine particles being mixed at a contact interface to form an intermediate-density beneficiation region; and feeding minerals to be beneficiated from an upper portion of the dry beneficiation system to pass through the low-density beneficiation region, the intermediate-density beneficiation region, and the high-density beneficiation region in sequence.

Gas-solid fluidized bed dry beneficiation process using beneficiation density gradient

The present invention is directed towards a process for upgrading lignite comprising: prior to production pre-assess the calorific value of the coal, by selecting a relational expression between a calorific value of lignite and a degree of metamorphism, a moisture content and an ash content thereof based on a ratio of the ash content to the moisture content, pre-assess the calorific value of the coal; combining a relational expression between a production cost and the ash content and moisture content to make a cost budget; determining degrees of deashing and drying; selecting and implementing a lignite ash reduction pretreatment process; and implementing dry sorting first and then drying. The upgrading process has high sorting efficiency, high drying efficiency and low production cost, and meets the requirement for the surface moisture of the raw coal in the dry sorting operation.

Method and process for upgrading lignite by collaborative optimization of drying and dry sorting

A modular quality improvement process and quality improvement system for high density coal measures oil shale. The process comprises: performing separation on the material with a particle size larger than 13 mm by an air dense medium fluidized bed, performing separation on the material with a particle size equal to or less than 13 mm and larger than 6 mm by an air dense medium fluidized bed, performing separation on the material with a particle size equal to or less than 6 mm and larger than 3 mm by a vibrated dense medium fluidized bed, and performing separation on the material with a particle size equal to or less than 3 mm by a vibrated fluidized bed, and recovery of a medium by magnetic separation for use as a circulating medium.

Modular quality improvement process and quality improvement system for high density coal measures oil shale

A system for separation and drying of moist fine particle coal includes a blast blower, a surge tank, a moisture detection sensor, a control device and two pipelines, wherein the blast blower is communicated with the surge tank; one end of two pipelines which are connected in parallel is communicated with the surge tank, while the other end is communicated with a fluidized bed; a first pipeline includes a first valve, a first flowmeter, an air heater and an electric butterfly valve which are connected in series sequentially, while the second pipeline includes a second valve and a second flowmeter which are connected in series; the moisture detection sensor is arranged in the fluidized bed; and the control device is connected with the blast blower, the first valve, the first flowmeter, the air heater, the second valve, the second flowmeter and the moisture detection sensor.

Coupled system and method for the separation and drying of moist fine particle coal

Drying and separation vibrating fluidized bed for processing wet coal by high-temperature hot air. Wet coal is fed into a vibrating separation chamber connected to a hot air supply duct. The wet coal is vibrated as it is dried and is layered as heat and mass transfer occur between the high-temperature air and the wet coal particles. Hot air enters the bottom of separation chamber through a distribution plate that includes asbestos fiber cloth sandwiched between clamping plates. The wet coal is fed through a feeding distribution device that separates the coal pieces as they enter the separation chamber. After the coal is dried and layered, the heavy and light material exits the separation chamber through two discharge impellers.

Drying and separation integrated machine for vibrating fluidized bed

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Jiangsu, China

Chenlong Duan