SU1435636A1 - Method of cooling sinter cake - Google Patents

Abstract

The invention relates to the field of metallurgy, specifically to agglomerative production, can be used simultaneously to cool the agglomerate, stabilize its particle size distribution and dry the components of the sinter blend with the heat of the agglomerate. The purpose of the invention is to reduce energy consumption, simplify the processing of the cake, and utilize its heat. The agglomeration spec- trum of the post drbleni is fed into the drum and mixed together with the ore components and sinter charge containing (10–30)% of moisture. The ratio of the amount of agglomerate and ore components is pooled in the range of (0.1-2.0): 1 wt.%. After cooling the agglomerate to a predetermined temperature, the mixture is dispersed at a rumble and fractions less than 5 mm are sent to the preparation of the sintering mixture. (L

Description

4 00 O1

Od

00 05

The invention relates to metallurgy, specifically to agglomeration production, and can be used simultaneously to cool the agglomerate, stabilize its grain size and dry the components of the agglomeration mixture with the heat of the agglomerate.

The purpose of the invention is energy consumption, simplification of the sinter processing schemes and utilization of its heat. Using wet components of the sintering mixture or their mixtures to cool the sintering sinter in the intermittent layer. Agglomerate can be used directly to dry the excessively wet units of the charge. Staying agglomeration spake at its cooling stages in an atmosphere of water vapor contributes to the hydration process of undigested lime in the agglomerate, its destruction in the most fragile areas and the breaking of sharp corners with repeated falls and spilling of pieces in the drum, which ensures the stabilization of mechanical strength and particle size of the finished sinter,

The components of the sintering mixture used to cool the sintering sinter are iron ore or manganese concentrates, pshamas of metallurgical production, or a mixture of these with a moisture content of 10–30%.

The method is carried out as follows.

The agglomeration spec. After crushing is fed into the drum and mixed together with the ore components of the aggregate charge containing 10-30% moisture. The ratio of the amount of agglomerate and ore components is maintained within (0.1-2.0) g 1 wt.% After cooling the agglomerate to a predetermined temperature, the mixture is scattered at the roar and fractions less than 5 mm are sent to the preparation of the sinter blend.

The choice of the lower humidity value of the cooling agent (10%) is due to the fact that at this humidity the optimum value is achieved.

five

G

five

0

five

0

five

0

five

moisture content of the sintering mixture, and its components have satisfactory flowability and metering accuracy in the preparation of the charge. The maximum permissible humidity of the cooling agent (30%) is determined based on the maximum possible. In the practical situation, the value of the hygroscopic moisture content retained by the components of the agglomerate. The presence of free moisture complicates the organization of cooling sinter sinter at the maximum permissible rate of SO C / min,

The mass ratio between the cooling agent and α-agglomeration is in the range (6.1 - 2.0); 1 determines the thermal balance of the cooling process and the maximum permissible cooling rate, and depending on the initial humidity of the cooling agent and the initial temperature of the agglomeration sinter, the average for the cooling period is the ratio between them and the change in time for this ratio during the cooling course. The lower value of the ratio (0.1: 1) is set for the initial temperature of the sintering sinter 500 - or the humidity of the cooling agent 20 - 30%, and the upper (2.0: 1) -; at a specimen temperature of 300 - or a cooling agent humidity of 10-20%. :

The pouring layer with a drop of materials ensures the crushing of the agglomeration layer and its uniform mixing with the cooling agent.

Primer p. The sintering plant is sintered, the iron ore part of which consists mainly of ore concentrate of 24 wt.% Hygroscopic and 12 wt.% Hydrated moisture.

Sinter sinter with a mass yield of 125. t / h is stirred for 500–600 with iron ore concentrate with a total moisture content of 36.0% and a mass flow rate of 75 t / h (the ratio between the concentrate and the sintering spec is 0.6: 1) and then the mixture is dispersed at the screen and 80.0 t / h of sinter of more than 5 mm class with a temperature of 100-150 ° C and 110.0 t / h of product with a mass fraction of 8% hygroscopic moisture of preparation of the sintering mixture are obtained.

When mixing, the ratio between the concentrate and the agglomeration cooling are controlled at a speed not exceeding 100 ° C / min. This is achieved by maintaining a ratio of 0.1: 1 in the first 40% of the duration of the mixing period, and 0.93: 1 in the subsequent 60%.

The proposed method makes it possible to abandon the construction of bulky complexes for the cooling of agglomeration sinter with the installation of complex equipment and forced supply of cooling air, as well as fully utilize the heat of sintering sinter to dry the components of the sintering mixture by direct contact, which saves energy costs.

The method of cooling sinter sinter, including crushing it, loading it into the cooler and feeding the cooling agent into the bed, characterized in that, in order to reduce energy consumption, simplify the processing of the cake, and heat recovery, the ore components of the sintering mixture containing 10-30% of the free moisture, mainly of the concentrate of wet enrichment, which is fed into the pouring layer of the agglomerate, and the mass ratio of the cooling agent and the sintering cake is maintained ayut in the range (0.1 - 2.0): 1.

Claims (1)

Claim A method of cooling an agglomeration cake, including crushing it, loading it into a cooler and feeding it into a layer of a cooling agent, characterized in that, in order to reduce energy consumption, simplify the processing of cake and utilize its heat, ore components of the sinter mixture containing 10 are used as a cooling agent -30% free moisture, predominantly concentrate: wet enrichment, which is fed into the overgrown layer of agglomerate, and the ratio by weight of the cooling agent and agglomeration cake is maintained in Yedelev (0,1 2,0): I. Compiled by L. Shashenkov [Editor N. Yatsola Tehred M. Didyk Corrector S. Shekmar Order 5613/24 Circulation 595 Subscription VNIIIPI of the USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushskaya nab ", d. 4/5 Production and printing company, Uzhhorod, st. Project, 4.