CN101413868A

CN101413868A - Method for checking coking grain appearance

Info

Publication number: CN101413868A
Application number: CNA2008102309673A
Authority: CN
Inventors: 翟爱萍; 丁双玉; 尹荣花; 吴杰
Original assignee: YUGUANG ZINC INDUSTRY Co Ltd HENAN
Current assignee: YUGUANG ZINC INDUSTRY Co Ltd HENAN
Priority date: 2008-11-20
Filing date: 2008-11-20
Publication date: 2009-04-22

Abstract

The invention relates to a method for testing appearances of scorched particles which are used in the zinc smelting process. The method can faster and more exactly measure particle size distribution in the scorched particles and contents of impurities such as bastard coal and the like by two working procedures of screening and wet separation, and is a practical quality control method; firstly, the sampling is filtered by using a screening method; the sampling is sieved by sieves with the apertures of 5 and 15 mm; the plus sieve of 15 mm and the siftage of 5 mm are weighted; the contents of the plus sieve and the siftage are calculated, and are judged compared with the standard; secondly, the sieved sampling is collected again and washed by a wet cleaning process; the scorched particles are washed out by clear water, laid open, are dried, and then the impurities are pricked out; the impurities pricked out are dried and weighted; the contents of the impurities are figured out. The method has the advantage that quality judgment is more scientific and exacter.

Description

The method of checking coking grain appearance

Technical field

The present invention relates to a kind of method of the checking coking grain appearance that the outward appearance of the burnt grain that uses in the zinc metallurgical process is tested, this method is by screening and wet concentration two procedures, can measure the content of impurity such as size-grade distribution and bastard coal in the burnt grain more fast and accurately, be a kind of method of quality control of practicality.

Background technology

Direct range estimation criterion is generally adopted in the visual testing of burnt grain at present, the quality inspector according to the granularity of the experience focusing grain of individual's accumulation, contain impurity such as cash and estimate, and judge whether exceed standard.Though this method is simple, lack scientific basis, influenced greatly by factor and individual subjective factor, when lacking experience, the checker can produce bigger error.

Summary of the invention

The objective of the invention is to overcome the deficiency of traditional method of inspection and a kind of more method of the checking coking grain appearance of science of quality judging that makes is provided, " screening " is meant the sieve of burnt grain through 15mm and two kinds of specifications of 5mm sieved to detect the distribution content of granularity in the burnt grain; " wet concentration " picks out impurity such as bastard coal, to measure its impurity content after being meant that a burnt grain is by washing.

The object of the present invention is achieved like this: a kind of method of checking coking grain appearance, specific as follows:

At first adopt screening method that sampling is screened, respectively with the aperture be 5 and the sieve of 15mm sample is sieved, and the screen overflow of 15mm and the screen underflow of 5mm are weighed, calculate the content of screen overflow and screen underflow, reference standard is judged;

Secondly the sample after will sieve gathers again, adopts wet cleaning process to wash, and with clear water Jiao is rinsed well, spreads foreign bodies after the airing out, weighs after the impurity of picking out is dried, and calculates impurity content.

Before adopting screening method that sampling is screened, spot sampling 5-10Kg at first, the sampling sample is carried out " inquartation " division, be about to the abundant mixing of sample of collection, pile taper shape, it is pressed into round pie, be cut to 4 equal portions by the center by cruciform, discard 2 parts of any diagonal angle, operation is gone down successively, at last Jiao's grain is divided to 1500-2000g, and then screen and wash.

When wet cleaning process, do not gather the sample after the screening again, and carry out spot sampling 5-10Kg again, adopt inquartation with Jiao division to 1500-2000g, be about to the abundant mixing of sample 5-10Kg of collection, pile taper shape, it is pressed into round pie, be cut to 4 equal portions by the center by cruciform, discard 2 parts of any diagonal angle, operation is gone down successively, at last Jiao's grain is divided to 1500-2000g, with clear water the flour on burnt grain surface is rinsed well then, weighed after drying, select impurities and calculate impurity content.

The present invention separates greater than 15mm with less than the burnt grain of 5mm by the screening method handle; By wet cleaning process the impurity such as cash that contains that is mingled in the burnt grain is picked out, whether the calculating of weighing respectively then judge conformance with standard, thereby reach the purpose of control of quality, has quality judging more science, more accurate, advantage more efficiently.

Description of drawings

Fig. 1 is a process flow diagram of the present invention.

Among the figure, (1) transport burnt grain lorry, (2) sampling, (3) sample splitting and weigh, the screening of (4) sample, (5) are weighed, (6) washing, (7) foreign bodies, (8) impurity are weighed.

Embodiment

Embodiment: spot sampling 5-10Kg at first, sample is carried out " inquartation " division, be about to the abundant mixing of sample of collection, pile taper shape, it is pressed into round pie, be cut to 4 equal portions by cruciform by the center, discard 2 parts of any diagonal angle, operation is gone down successively, at last Jiao's grain is divided to 1500-2000g, screens and washes.

1, screening method: adopt the sieve focusing grain of 15mm and 5mm to sieve.To the sieve screening of the sample (1500-2000g) of on-the-spot inquartation division by 15mm and 5mm, respectively the screen overflow of 15mm and the screen underflow of 5mm are weighed, calculate screen overflow and screen underflow content, reference standard is judged;

2, wet cleaning process: the sample (1500-2000g) to on-the-spot inquartation division is rinsed the flour on surface well with clear water, weighs after drying, and selects impurities and calculates impurity content.

When wet cleaning process, also can not gather the sample after the screening again, and carry out spot sampling 5-10Kg again, adopt inquartation with Jiao division to 1500-2000g, be about to the abundant mixing of sample 5-10Kg of collection, pile taper shape, it is pressed into round pie, be cut to 4 equal portions by the center by cruciform, discard 2 parts of any diagonal angle, operation is gone down successively, at last Jiao's grain is divided to 1500-2000g, with clear water the flour on burnt grain surface is rinsed well then, weighed after drying, select impurities and calculate impurity content.

As shown in the figure; after transporting burnt grain lorry (1) arrival applying unit; the quality inspection station is at first carried out outward appearance and is judged, carries out grab sample (2), the about 5-10 kilogram of sampling weight after no abnormal; adopt inquartation to sample splitting (3); 4-5 weight of division reaches 1500-2000g, respectively with the aperture be 5 and the sieve of the 15mm sample after to division sieve (4), and to the screen underflow of the screen overflow of 15mm and 5mm weigh (5); calculate the content of screen overflow and screen underflow, reference standard is judged.Sample after the screening is gathered again, with a proper container splendid attire and wash (6), washing 3-5 selects a clean place to spread foreign bodies (7) after airing 2-3 minute out all over the back, with weighing (8) after the impurity oven dry of picking out, calculates impurity content.

Claims

1, a kind of method of checking coking grain appearance is characterized in that: specific as follows:

At first, adopt screening method that sampling is screened, respectively with the aperture be 5 and the sieve of 15mm sample is sieved, and the screen overflow of 15mm and the screen underflow of 5mm are weighed, the content of calculating screen overflow and screen underflow, reference standard is judged;

Secondly, the sample after the screening is gathered again, adopt wet cleaning process to wash, Jiao grain is rinsed well, spread foreign bodies after the airing out, weigh after the impurity of picking out is dried, calculate impurity content with clear water.

2, the method for checking coking grain appearance according to claim 1, it is characterized in that: before adopting screening method that sampling is screened, at first spot sampling 5-10Kg carries out " inquartation " division to the sampling sample, be about to the abundant mixing of sample of collection, pile taper shape, it is pressed into round pie, be cut to 4 equal portions by cruciform by the center, discard 2 parts of any diagonal angle, operation is gone down successively, at last Jiao's grain is divided to 1500-2000g, and then screens and wash.

3, the method of checking coking grain appearance according to claim 1, it is characterized in that: when wet cleaning process, do not gather the sample after the screening again, and carry out spot sampling 5-10Kg again, adopt inquartation with Jiao division to 1500-2000g, be about to the abundant mixing of sample 5-10Kg of collection, pile taper shape, it is pressed into round pie, be cut to 4 equal portions by cruciform by the center, discard 2 parts of any diagonal angle, operation is gone down successively, at last Jiao's grain is divided to 1500-2000g, with clear water the flour on burnt grain surface is rinsed well then, weigh after drying, select impurities and calculate impurity content.