一级品

分析认为，结合现有的原燃料条件及用户要求，综合考虑冶炼成本，以控制生铁一级品率在50%为宜。

Thus combining existing raw material and fuel condition and the consumer requests , considering smelt cost synthetically , controlling the first-grade products ratio of pig iron in 50 % is proper .

生铁一级品率控制与最佳效益分析

Control of First-grade Products Ratio of Pig Iron and Analysis of Best Benefits

一级品率提高30%；单炉产量可提高约50%，特级品SiC含量由传统技术的98%提高到99.5%以上。

The SiC content of the top-grade product is up to 99.5 % while the tradition technology is 98 % .

试验表明，铵盐法工艺可行、消耗低，主产品Ca（OH）2纯度高，副产品轻质碳酸镁符合国标一级品。

It is indicated that Ammonium salt method is technically feasible due to low consumption , high purity of the main product and by-product , light magnesium carbonate is fit for first-grade product of GB of China .

中和液的pH值控制在6.0左右时，中和液中的Na2CO3全部反应完全，并可生产出接近一级品的亚硫酸钠产品。

The first-grade Sodium Sulfite can be produced when the pH value of the neutralization liquid is controlled at about 6.0 at which conditon the Na2CO3 will be fully reacted .

在优惠工艺条件下，产品硫酸钾符合标准一级品要求，其中，K2O＞45%，Cl＜1.5%；

The product of first grade , with K 2O > 45 % and Cl < 1.5 % , was obtained under the optimum conditions .

本文研究了以直接耐晒黑G染料生产中的废钡渣为原料制取氯化钡的方法，氯化钡的得率达到废钡渣量的70.99%，产品质量达到一级品的标准。

The preparation method of barium chioride from barium waste in the benzo fast black G dye as raw material is studied . The retrieving ratio of barium chioride is 70 . 99 % of barium waste and the quality of the products reaches the standard of first chass product .

在最优操作条件下精制油酸度小于7.0mgKOH/（100mL），回收石油酸达到石油酸一级品65号酸的质量标准（SH/T0530-92）。

Under optimum operation conditions the acidity of refined oil was below 7.0 mgKOH / 100mL , and the quality of recovered acid met the 65 # petroleum acid standard ( SH / T 0530-92 ) .

实验结果表明，经微波辐照8min，所得活性炭的亚甲基蓝脱色力为15mL/0.1g，为国家标准一级品（LY216-79）的125倍，时间仅为传统方法的1/45。

According to the experimental data , the microwave processing is 45 times as fast as the conventional processing , and the methylene blue decolorizing ability is 1.25 times as strong as that of the first grade in standard of powder activated carbon of China ( LY 216-79 ) .

提高银锭一级品率的技术实践

To improve the rate of the grade one silver ingot

试验产品均达到了一级品的质量要求。

Products of quality achieve grade of one reference .

影响碳化硅冶炼一级品率的因素分析

Analysis Factor of Affecting First-Rate Product in Smelting SiC

湘西镁厂生产的金属镁产品质量达到一级品标准。

First level standard of Mg metal was produced by western Hunan Mg plant .

这些蛋都是一级品。

These eggs are all class A.

通过生产证明，此工艺生产的氟化钠产品和水合二氧化硅副产品的质量均达到或超过国家标准一级品标准，而其生产成本比其他工艺生产成本低。

The cost of the product is lower than that of the product made by other process .

提高锌白炉等级氧化锌一级品率的生产实践

The production practice of improving the rate of first-grade product of zinc oxide by zinc white furnace

新钢二铁厂提高生铁一级品率的生产实践

Production Practice about Increasing First-grade Product Rate of Pig Iron at the Second Ironmaking Plant of Xingang

我们提供的商品系一级品，相信会使你非常满意。

These goods we offer you is al quality , and we know they will give you the best of satisfaction .

特级品稀奶油可直接供给食用，一级品和二级品可作为加工奶油或其他食品的原料。

Suitable For : The fancy cream eatable without any processing ; Grade one and tow for butter processing & ingredients .

实践表明，6号高炉采取优化参数等措施后，生铁一级品率有了明显提高。

The practice shows that the rate increases obviously after improving measures such as optimizing parameters of No.6 BF are made .

上述封存好的样品，我们已经作了安排。至于一级品的袋子，不必送样品了。

Sealed sample of the above be to be take as arranged , but the bag of the1st class need not be sample .

试验结果表明，其产品氧化锌纯度可达99.6%以上，符合一级品的要求。

The results showed that the purity of Zincite as product was more than 99.6 % in according with the requirements of grade A products .

介绍了盘丝的等温淬火工艺及解决淬火变形的主要措施，为生产一级品提供了质量保证。

The paper introduces the isothermal quenching process for wirt rod and some significant measures against quenching deformation and provides quality assurance for high grade products .

装置投入运行1年来，取得了较好的环境效益和经济效益，使氟气总吸收率达99%以上，并可副产氟硅酸钠，其产品质量达一级品标准。

The unit has run for one year with good environmental and economic benefits , and the byproduct sodium fluorosilicate reaches the first-class product standard in quality .

精制后柴油储存安定性显著提高，储存3个月后，仍满足国家一级品质量要求。

Storage stability of the LCO has been evidently improved and it can still meet the requirements of national first-grade product after it has been stored for three months .

含盐合格率由90%提高至100%，一级品率由80%提至90%以上。

The percentage of product with qualified salt content is increased from 90 % to 100 % and the yield of first-level product is raised from 80 % to over 90 % .

目的是从中找出内折产生的真正原因，在生产的各个环节进行有效控制，以减少内折，提高产品的一级品率。

The aim is to find the real reason making folds and effectively control the links in the producing in order to reduce the folds and improve the quality of finished product .

中间试验表明，该工艺路线及设备设计合理可行，产品质量稳定，符合GB5309-85国标一级品标准。经用户使用，反应良好。

Pilot experiments have shown that the assembly line and the equipment design are satisfactory and the quality of the product is stable and conformable to the requirements of PRC standards GB 5309-85 .

试验结果表明，新工艺可获得符合国家标准GB－1613－79一级品硝酸钡产品，产品收率在98%以上，有较好的经济效益。

The test results indicate that the products come up to first grade of the national standard GB 1613 79 and the recovery more than 98 % , being of a good economic benefit .

针对影响工业萘质量、产率的综合因素，从提高原料质量、加强设备改造和维修、完善操作制度等方面下功夫，从而稳定了生产操作，使工业萘产率提高，质量达到一级品标准。

Through the ways of laying stress on the quality of raw materials , strengthening the transformation and maintenance of equipments and perfecting the operation , the quality and yield of industrial naphthalene is improved .