Mineral powder drying method and drying device

A technology of drying device and mineral powder, which is applied in the direction of drying, drying machine, heating device, etc., can solve the problems of low drying efficiency, high cost of drying equipment, inability to dry and dehydrate mineral powder, etc., and achieve the goal of drying The effect of high efficiency and low investment

Active Publication Date: 2014-10-22
TAIYUAN IRON & STEEL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low drying efficiency, high cost of drying equipment, and the drying temperature of the heat received by the mineral powder is higher than the withstand temperature of the rubber conveyor belt, it cannot be used for the drying and dehydration of the mineral powder on the conveyor belt.

Method used

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  • Mineral powder drying method and drying device
  • Mineral powder drying method and drying device
  • Mineral powder drying method and drying device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This embodiment is the drying and dehydration system of the slag powder in the 300,000-ton ferrochrome smelting project of the applicant. The actual drying and dehydration slag powder throughput is 60 tons / hour, and the actual moisture content of the slag powder is about 10~12%. The roasted ore powder is chromite powder, which requires a moisture content of 8.5-9.1%, which is less than the 9.1-9.6% required for pelletizing, and the absolute amount of moisture released per hour is 600±20Kg / h.

[0049] The gas infrared radiators all use the luma Schwank26 gas infrared radiator from Schwank, Germany. The combustion characteristics of this equipment are: the flame temperature is as high as 900 ° C, and the CO emission is very low; the flame is short, NO x Low emission and low noise. The surface of the ceramic sheet used in this equipment has a rectangular concave surface, which increases the surface area; has good heat insulation; excellent heat dissipation, can be touched ...

Embodiment 2

[0052] In this embodiment, the 18 gas infrared radiators of the first embodiment of the device are divided into three groups in turn, and each group of 6 sets controls the combustion power of the total gas in groups, and the others are the same as those of the first embodiment of the device. See Figure 4 , the solenoid valve of the first gas infrared radiator 1-18th gas infrared radiator 18 among the figure is installed like this. The first gas infrared radiator 1, the fourth gas infrared radiator 4, the seventh gas infrared radiator 7, the tenth gas infrared radiator 1, the thirteenth gas infrared radiator 13 and the sixteenth gas infrared radiator 16 are The first group, they correspond to the installed first solenoid valve 1A, fourth solenoid valve 4A, seventh solenoid valve 7A, tenth solenoid valve 10A, thirteenth solenoid valve 13A and sixteenth solenoid valve 16A, for each solenoid valve Corresponding respective gas supply branch pipes 22 are connected to the gas suppl...

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Abstract

The invention relates to a mineral powder drying method and drying device. Infrared radiators of the drying device are arranged in the direction of a conveying belt. Each infrared radiator is provided with a reflection cover, an electromagnetic valve and a non-contact temperature measurer, wherein the infrared radiator radiates mineral powder on the conveying belt, the electromagnetic valve is connected to an air inlet of the infrared radiator, the electromagnetic valve is connected with a gas branch pipe, and the gas branch pipe is communicated with a gas header pipe. The drying method comprises the steps that the dehydrated mineral powder passes through the drying device and is discharged to the conveying belt through a discharging opening, and the water content of the mineral powder ranges from 10% to 11%; infrared radiation is carried out on the mineral powder by all the gas infrared radiators in sequence under the infrared radiation effect of the gas infrared radiators, and the water content of the mineral powder is decreased to range from 8.5% to 9%; after the mineral powder is in the stable baking state, the surface temperature of the conveying belt ranges from 80 DEG C to 120 DEG C. According to the mineral powder drying method and drying device, the drying efficiency is high, and the drying equipment cost is low.

Description

technical field [0001] The invention relates to a method for drying mineral powder and a drying device thereof. Background technique [0002] The production process of chrome ore roasting pellets is roasting and agglomerating finely ground concentrate powder. It is a mixture of concentrate powder, binder (bentonite) and fuel (coke), rolled into green balls with a diameter of 8-15mm in a pelletizer, then dried, roasted, and consolidated to form a pellet with good metallurgical properties. The high-quality chromium-containing raw materials are supplied to ferrochromium alloy smelting. [0003] The main process of chrome ore roasting pellet production includes raw material preparation, batching, grinding, mixing, pelletizing, drying and roasting, cooling, finished product and return ore treatment, etc. The finely ground concentrate powder is easy to pelletize, and the finer the particle size, The higher the ball forming rate, the higher the strength of the roasted chromium or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B15/18F26B23/02
Inventor 高晔明白灵宝周宜洲李郁孙全利
Owner TAIYUAN IRON & STEEL GROUP
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