SU1674969A1 - Limestone grinding unit - Google Patents

Abstract

The invention relates to installations for the preparation of calcareous flour. 11 The purpose of the invention is to increase production efficiency. The installation contains a hammer mill 1, a control circuit 2, a shaft dryer 5, a gas duct 6 and inertial separators 9 and 10. The supply of the shaft dryer with a control loop allows the plant to maintain a constant aerodynamic mode, which increases the efficiency of lime flour production. 1 il. ggazhts (L S about 1 5 About y

Description

The invention relates to carbon dioxide, for the preparation of limestone M.M.I and can be used in t on households. construction and other areas of thought

The purpose of the invention is the increase in the effek gianossia production

In the psi acha drawing ums t. and

sectional view

The installation contains a drip mill 1, a regulating congure 2, made of two non-communicating: between channels 3 and 4. formed by double walls of the shaft dryer-hay; the axo, having an exit respectively in the direction of the mill and the shaft 5 into which gas duct 6 is supplied with 1l of dry air, an agent, a flow divider 7, which distributes incoming air through the channels of the regulating circuit, a charging funnel 8, inertial separators 9 and 10 with regulating slide valves 11 and 12.

The installation works as follows.

The carbonate feedstock is fed through a feed hopper 8 into a shaft dryer 5, where it is dried and particles less than 1 mm in size are separated. This fraction is a ready-made imitation of flour / which is taken out in a gas cleaning system.

Unveiled dried material is fed to the hammer mill 1 for grinding. As a drying agent, flue gases are used that are led by the flue 6 to the lower part of the dryer where they split up into two streams, some of the gases rush towards the incoming raw material of the other part of the gases enters the mill. The distribution of flue gases into two streams and the partial formation of a grain size distribution are known. the flour is carried out with the help of the gates 11 and 12 of the inertial separators 9 and 10. The final formation of a dispersed slag of limestone flour is reached ia o

constant hydrodynamic conditions in the rotor space of a hammer mill and in a shaft dryer by supplying the required amount of gases from an air controlled circuit 2

By reducing the load on the drying

MHTU and with the response of the reduction of tk N y: pchk. 1 JHX in ner of flue gases of non-propellant type is compensated from channel 3 of the regulating circuit. When its load increases and the corresponding increase in the flue gases coming into the mine shaft, the rotor space of the hammer mill is replenished from the rocker 4

The distribution of gases between the channels of the PS unit using the air flow divider 7 (at the required position R of the regulating circuit i.e., is exhausted (ase, taken from the process line after the sys- tem. Gas cleaning

Such a design of the installation allows a constant aerodynamic regime to be rotated in the rotary space of the hammer mill and the shaft dryer, thereby ensuring a very good dispersion of the old product Ti at the time of measurement of humidity and

S5 (in a broad CI; EP.ZONR. that increases the efficiency of production and known ICCI

Claims (1)

The invention The installation of dp of limestone flour containing a pulverizing mill, mine land 1ku, inertial separators with regulating shiarii characterized in that, in order to increase production efficiency, the shaft dryer is equipped with a regulating circuit made of two incompatible channels and a distribution on the code, a flow divider of the drying agent is mounted on the circuit