China University of Mining and Technology

Yuemin Zhao

Chenlong Duan

Bo Zhang

Liang Dong

Chengyong Zhang

Zhenfu Luo

Chenyang Zhou

Enhui Zhou

Pengfei Zhao

Chusheng Liu

Guanghui Yan

Junyu Lu

Zhijie Fu

Jingfeng He

Xuliang Yang

Xuchen Fan

Jesse Zhu

Zengqiang Chen

Zongsheng Sun

Shulei Song

Xianliang Meng

Yadong Zhang

Cheniong Duan

Haishen Jiang

Jinpeng Qiao

Hairui Diao

Jida Wu

Provided is a method for upgrading a coal slime through synergistic dehydration, including: subjecting coal slime water to be treated to filter pressing dehydration to obtain a filter cake; and crushing the filter cake, sieving and sizing, and subjecting a resulting oversize to steam transient dehydration to obtain a dehydrated coal slime.

Method for upgrading coal slime through synergistic dehydration

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

Embodiments of the invention provide a synchronous statically indeterminate mesh-beam excitation large-scale vibrating screen, including a screen box, a support spring group, a spring base, a motor mount, a tire coupling, and a motor, wherein, a statically indeterminate mesh-beam excitation body is arranged on the screen box, and the statically indeterminate mesh-beam excitation body has at least one synchronous eccentric block vibration exciter group and two self-synchronous eccentric block vibration exciter groups in it; each self-synchronous eccentric block vibration exciter group includes a self-synchronous transmission shaft fixed to the side plates of the screen box via a bearing chock, and self-synchronous eccentric blocks fixed to the side plates of the screen box in symmetry are arranged on the self-synchronous transmission shaft; the self-synchronous transmission shaft of the self-synchronous eccentric block vibration exciter group at the side of the motor is connected with a reducer via the tire coupling, and the reducer is connected to the motor via a transmission belt.

Synchronous statically indeterminate mesh-beam excitation large-scale vibrating screen

An extra-large vibrating screen with duplex statically indeterminate mesh beam excitation body and plate type combined bearing beam comprises plate type flat and rigid statically indeterminate combined bearing beam () arranged in a screen box (), a plurality of Y-shaped statically indeterminate combined reinforcing beams () arranged on the side plates () of the screen box alternately, duplex statically indeterminate supporting plates () linking a plurality of mesh beams () to the statically indeterminate connecting plate () and the side plate () so as to form a container made of a beam system, the vibration exciters () in the statically indeterminate mesh beam unit comprising eight sets of vibration exciters, which are aligned in pair horizontally and linked together through universal couplings (), and connected to the duplex statically indeterminate mesh beam excitation body () to form a highly rigid integral vibrating assembly. The vibrating screen is simple and reliable in structure, can vibrate smoothly, and therefore can be widely used in coal, metallurgical, chemical, and environmental protection industries.

Extra-large vibrating screen with duplex statically indeterminate mesh beam

An elastic sieving method and corresponding large-sized elastic vibration screen. The present invention utilizes a screening surface and a separate sieving machine. A screen mat located on the sieve box is connected to multiple small rectangular screens. While the machine is vibrating, the resonation of screen rods located on the screen mat connected by small rectangular screens are initiated to screen the material and to cause the vibration of the whole vibration screen and realize the conveyance and lamination of materials. Because the screening surface is in a state of resonance, the vibration strength is strong enough to prevent the screen meshes from becoming plugged, allowing for high sieving efficiency. A bearing in the sieving mechanism is installed with a vibration damping ring, placing the bearing in a resonant state, allowing for a low dynamic stress level, which satisfies the process requirement for large-sized vibration screen excitation units with a screening surface as wide as 4800 mm. Thus, the production efficiency of vibration screen is high, the structure of the machine is simple and easy to repair and maintain, and energy consumption is reduced. Furthermore, the dynamic stress level of the sieving machine is low, the reliability is high, and the vibrations are stable. These properties allow the present invention to have a wide range of practical applications, including uses in the coal, metallurgic, chemical and environmental protection fields.

Elastic sieving technique and corresponding large-sized elastic vibration screen

Growing community of inventors

Jiangsu, China

Yuemin Zhao